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diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -13,13 +13,18 @@
'ArcanistAmendWorkflow' => 'workflow/ArcanistAmendWorkflow.php',
'ArcanistAnoidWorkflow' => 'workflow/ArcanistAnoidWorkflow.php',
'ArcanistArcanistLinterTestCase' => 'lint/linter/__tests__/ArcanistArcanistLinterTestCase.php',
+ 'ArcanistArrayIndexSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistArrayIndexSpacingXHPASTLinterRule.php',
+ 'ArcanistArraySeparatorXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistArraySeparatorXHPASTLinterRule.php',
'ArcanistBackoutWorkflow' => 'workflow/ArcanistBackoutWorkflow.php',
'ArcanistBaseCommitParser' => 'parser/ArcanistBaseCommitParser.php',
'ArcanistBaseCommitParserTestCase' => 'parser/__tests__/ArcanistBaseCommitParserTestCase.php',
'ArcanistBaseUnitTestEngine' => 'unit/engine/ArcanistBaseUnitTestEngine.php',
'ArcanistBaseWorkflow' => 'workflow/ArcanistBaseWorkflow.php',
'ArcanistBaseXHPASTLinter' => 'lint/linter/ArcanistBaseXHPASTLinter.php',
+ 'ArcanistBinaryExpressionSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistBinaryExpressionSpacingXHPASTLinterRule.php',
+ 'ArcanistBlacklistedFunctionXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistBlacklistedFunctionXHPASTLinterRule.php',
'ArcanistBookmarkWorkflow' => 'workflow/ArcanistBookmarkWorkflow.php',
+ 'ArcanistBraceFormattingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistBraceFormattingXHPASTLinterRule.php',
'ArcanistBranchWorkflow' => 'workflow/ArcanistBranchWorkflow.php',
'ArcanistBritishTestCase' => 'configuration/__tests__/ArcanistBritishTestCase.php',
'ArcanistBrowseWorkflow' => 'workflow/ArcanistBrowseWorkflow.php',
@@ -29,10 +34,13 @@
'ArcanistCSSLintLinterTestCase' => 'lint/linter/__tests__/ArcanistCSSLintLinterTestCase.php',
'ArcanistCSharpLinter' => 'lint/linter/ArcanistCSharpLinter.php',
'ArcanistCallConduitWorkflow' => 'workflow/ArcanistCallConduitWorkflow.php',
+ 'ArcanistCallFormattingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistCallFormattingXHPASTLinterRule.php',
+ 'ArcanistCallTimePassByReferenceXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistCallTimePassByReferenceXHPASTLinterRule.php',
'ArcanistCapabilityNotSupportedException' => 'workflow/exception/ArcanistCapabilityNotSupportedException.php',
'ArcanistCheckstyleXMLLintRenderer' => 'lint/renderer/ArcanistCheckstyleXMLLintRenderer.php',
'ArcanistChmodLinter' => 'lint/linter/ArcanistChmodLinter.php',
'ArcanistChmodLinterTestCase' => 'lint/linter/__tests__/ArcanistChmodLinterTestCase.php',
+ 'ArcanistClassFilenameMismatchXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistClassFilenameMismatchXHPASTLinterRule.php',
'ArcanistCloseRevisionWorkflow' => 'workflow/ArcanistCloseRevisionWorkflow.php',
'ArcanistCloseWorkflow' => 'workflow/ArcanistCloseWorkflow.php',
'ArcanistClosureLinter' => 'lint/linter/ArcanistClosureLinter.php',
@@ -41,20 +49,26 @@
'ArcanistCoffeeLintLinterTestCase' => 'lint/linter/__tests__/ArcanistCoffeeLintLinterTestCase.php',
'ArcanistCommentRemover' => 'parser/ArcanistCommentRemover.php',
'ArcanistCommentRemoverTestCase' => 'parser/__tests__/ArcanistCommentRemoverTestCase.php',
+ 'ArcanistCommentSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistCommentSpacingXHPASTLinterRule.php',
+ 'ArcanistCommentStyleXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistCommentStyleXHPASTLinterRule.php',
'ArcanistCommitLinter' => 'lint/linter/ArcanistCommitLinter.php',
'ArcanistCommitLinterTestCase' => 'lint/linter/__tests__/ArcanistCommitLinterTestCase.php',
'ArcanistCommitWorkflow' => 'workflow/ArcanistCommitWorkflow.php',
'ArcanistCompilerLikeLintRenderer' => 'lint/renderer/ArcanistCompilerLikeLintRenderer.php',
+ 'ArcanistConcatenationSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistConcatenationSpacingXHPASTLinterRule.php',
'ArcanistConduitLinter' => 'lint/linter/ArcanistConduitLinter.php',
'ArcanistConfiguration' => 'configuration/ArcanistConfiguration.php',
'ArcanistConfigurationDrivenLintEngine' => 'lint/engine/ArcanistConfigurationDrivenLintEngine.php',
'ArcanistConfigurationManager' => 'configuration/ArcanistConfigurationManager.php',
'ArcanistConsoleLintRenderer' => 'lint/renderer/ArcanistConsoleLintRenderer.php',
+ 'ArcanistConstructorParenthesesXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistConstructorParenthesesXHPASTLinterRule.php',
+ 'ArcanistControlStatementSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistControlStatementSpacingXHPASTLinterRule.php',
'ArcanistCoverWorkflow' => 'workflow/ArcanistCoverWorkflow.php',
'ArcanistCppcheckLinter' => 'lint/linter/ArcanistCppcheckLinter.php',
'ArcanistCppcheckLinterTestCase' => 'lint/linter/__tests__/ArcanistCppcheckLinterTestCase.php',
'ArcanistCpplintLinter' => 'lint/linter/ArcanistCpplintLinter.php',
'ArcanistCpplintLinterTestCase' => 'lint/linter/__tests__/ArcanistCpplintLinterTestCase.php',
+ 'ArcanistDeclarationFormattingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistDeclarationFormattingXHPASTLinterRule.php',
'ArcanistDiffChange' => 'parser/diff/ArcanistDiffChange.php',
'ArcanistDiffChangeType' => 'parser/diff/ArcanistDiffChangeType.php',
'ArcanistDiffHunk' => 'parser/diff/ArcanistDiffHunk.php',
@@ -68,11 +82,19 @@
'ArcanistDifferentialDependencyGraph' => 'differential/ArcanistDifferentialDependencyGraph.php',
'ArcanistDifferentialRevisionHash' => 'differential/constants/ArcanistDifferentialRevisionHash.php',
'ArcanistDifferentialRevisionStatus' => 'differential/constants/ArcanistDifferentialRevisionStatus.php',
+ 'ArcanistDoubleQuoteXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistDoubleQuoteXHPASTLinterRule.php',
'ArcanistDownloadWorkflow' => 'workflow/ArcanistDownloadWorkflow.php',
+ 'ArcanistDuplicateKeysInArrayXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistDuplicateKeysInArrayXHPASTLinterRule.php',
+ 'ArcanistDuplicateSwitchCaseXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistDuplicateSwitchCaseXHPASTLinterRule.php',
+ 'ArcanistDynamicDefineXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistDynamicDefineXHPASTLinterRule.php',
+ 'ArcanistElseIfUsageXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistElseIfUsageXHPASTLinterRule.php',
+ 'ArcanistEmptyBlockStatementXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistEmptyBlockStatementXHPASTLinterRule.php',
'ArcanistEventType' => 'events/constant/ArcanistEventType.php',
+ 'ArcanistExitExpressionXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistExitExpressionXHPASTLinterRule.php',
'ArcanistExportWorkflow' => 'workflow/ArcanistExportWorkflow.php',
'ArcanistExternalLinter' => 'lint/linter/ArcanistExternalLinter.php',
'ArcanistExternalLinterTestCase' => 'lint/linter/__tests__/ArcanistExternalLinterTestCase.php',
+ 'ArcanistExtractUsageXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistExtractUsageXHPASTLinterRule.php',
'ArcanistFeatureWorkflow' => 'workflow/ArcanistFeatureWorkflow.php',
'ArcanistFilenameLinter' => 'lint/linter/ArcanistFilenameLinter.php',
'ArcanistFilenameLinterTestCase' => 'lint/linter/__tests__/ArcanistFilenameLinterTestCase.php',
@@ -97,6 +119,9 @@
'ArcanistHgProxyServer' => 'hgdaemon/ArcanistHgProxyServer.php',
'ArcanistHgServerChannel' => 'hgdaemon/ArcanistHgServerChannel.php',
'ArcanistHookAPI' => 'repository/hookapi/ArcanistHookAPI.php',
+ 'ArcanistImplicitConstructorXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistImplicitConstructorXHPASTLinterRule.php',
+ 'ArcanistImplicitFallthroughXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistImplicitFallthroughXHPASTLinterRule.php',
+ 'ArcanistImplicitVisibilityXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistImplicitVisibilityXHPASTLinterRule.php',
'ArcanistInstallCertificateWorkflow' => 'workflow/ArcanistInstallCertificateWorkflow.php',
'ArcanistJSHintLinter' => 'lint/linter/ArcanistJSHintLinter.php',
'ArcanistJSHintLinterTestCase' => 'lint/linter/__tests__/ArcanistJSHintLinterTestCase.php',
@@ -107,7 +132,9 @@
'ArcanistJSONLinterTestCase' => 'lint/linter/__tests__/ArcanistJSONLinterTestCase.php',
'ArcanistJscsLinter' => 'lint/linter/ArcanistJscsLinter.php',
'ArcanistJscsLinterTestCase' => 'lint/linter/__tests__/ArcanistJscsLinterTestCase.php',
+ 'ArcanistKeywordCasingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistKeywordCasingXHPASTLinterRule.php',
'ArcanistLandWorkflow' => 'workflow/ArcanistLandWorkflow.php',
+ 'ArcanistLanguageConstructParenthesesXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistLanguageConstructParenthesesXHPASTLinterRule.php',
'ArcanistLesscLinter' => 'lint/linter/ArcanistLesscLinter.php',
'ArcanistLesscLinterTestCase' => 'lint/linter/__tests__/ArcanistLesscLinterTestCase.php',
'ArcanistLiberateWorkflow' => 'workflow/ArcanistLiberateWorkflow.php',
@@ -129,6 +156,7 @@
'ArcanistMergeConflictLinter' => 'lint/linter/ArcanistMergeConflictLinter.php',
'ArcanistMergeConflictLinterTestCase' => 'lint/linter/__tests__/ArcanistMergeConflictLinterTestCase.php',
'ArcanistMissingLinterException' => 'lint/linter/exception/ArcanistMissingLinterException.php',
+ 'ArcanistNamingConventionXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistNamingConventionXHPASTLinterRule.php',
'ArcanistNoEffectException' => 'exception/usage/ArcanistNoEffectException.php',
'ArcanistNoEngineException' => 'exception/usage/ArcanistNoEngineException.php',
'ArcanistNoLintLinter' => 'lint/linter/ArcanistNoLintLinter.php',
@@ -136,6 +164,12 @@
'ArcanistNoneLintRenderer' => 'lint/renderer/ArcanistNoneLintRenderer.php',
'ArcanistPEP8Linter' => 'lint/linter/ArcanistPEP8Linter.php',
'ArcanistPEP8LinterTestCase' => 'lint/linter/__tests__/ArcanistPEP8LinterTestCase.php',
+ 'ArcanistPHPCloseTagXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPHPCloseTagXHPASTLinterRule.php',
+ 'ArcanistPHPCompatibilityXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPHPCompatibilityXHPASTLinterRule.php',
+ 'ArcanistPHPEchoTagXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPHPEchoTagXHPASTLinterRule.php',
+ 'ArcanistPHPOpenTagXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPHPOpenTagXHPASTLinterRule.php',
+ 'ArcanistPHPShortTagXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPHPShortTagXHPASTLinterRule.php',
+ 'ArcanistParenthesesSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistParenthesesSpacingXHPASTLinterRule.php',
'ArcanistPasteWorkflow' => 'workflow/ArcanistPasteWorkflow.php',
'ArcanistPatchWorkflow' => 'workflow/ArcanistPatchWorkflow.php',
'ArcanistPhpLinter' => 'lint/linter/ArcanistPhpLinter.php',
@@ -151,6 +185,8 @@
'ArcanistPhutilTestTerminatedException' => 'unit/engine/phutil/testcase/ArcanistPhutilTestTerminatedException.php',
'ArcanistPhutilXHPASTLinter' => 'lint/linter/ArcanistPhutilXHPASTLinter.php',
'ArcanistPhutilXHPASTLinterTestCase' => 'lint/linter/__tests__/ArcanistPhutilXHPASTLinterTestCase.php',
+ 'ArcanistPlusOperatorOnStringsXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPlusOperatorOnStringsXHPASTLinterRule.php',
+ 'ArcanistPregQuoteMisuseXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPregQuoteMisuseXHPASTLinterRule.php',
'ArcanistPuppetLintLinter' => 'lint/linter/ArcanistPuppetLintLinter.php',
'ArcanistPuppetLintLinterTestCase' => 'lint/linter/__tests__/ArcanistPuppetLintLinterTestCase.php',
'ArcanistPyFlakesLinter' => 'lint/linter/ArcanistPyFlakesLinter.php',
@@ -160,30 +196,40 @@
'ArcanistRepositoryAPI' => 'repository/api/ArcanistRepositoryAPI.php',
'ArcanistRepositoryAPIMiscTestCase' => 'repository/api/__tests__/ArcanistRepositoryAPIMiscTestCase.php',
'ArcanistRepositoryAPIStateTestCase' => 'repository/api/__tests__/ArcanistRepositoryAPIStateTestCase.php',
+ 'ArcanistReusedIteratorReferenceXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistReusedIteratorReferenceXHPASTLinterRule.php',
+ 'ArcanistReusedIteratorsXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistReusedIteratorsXHPASTLinterRule.php',
'ArcanistRevertWorkflow' => 'workflow/ArcanistRevertWorkflow.php',
'ArcanistRubyLinter' => 'lint/linter/ArcanistRubyLinter.php',
'ArcanistRubyLinterTestCase' => 'lint/linter/__tests__/ArcanistRubyLinterTestCase.php',
'ArcanistScriptAndRegexLinter' => 'lint/linter/ArcanistScriptAndRegexLinter.php',
+ 'ArcanistSemicolonSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistSemicolonSpacingXHPASTLinterRule.php',
'ArcanistSetConfigWorkflow' => 'workflow/ArcanistSetConfigWorkflow.php',
'ArcanistSettings' => 'configuration/ArcanistSettings.php',
'ArcanistShellCompleteWorkflow' => 'workflow/ArcanistShellCompleteWorkflow.php',
'ArcanistSingleLintEngine' => 'lint/engine/ArcanistSingleLintEngine.php',
+ 'ArcanistSlownessXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistSlownessXHPASTLinterRule.php',
'ArcanistSpellingLinter' => 'lint/linter/ArcanistSpellingLinter.php',
'ArcanistSpellingLinterTestCase' => 'lint/linter/__tests__/ArcanistSpellingLinterTestCase.php',
'ArcanistStartWorkflow' => 'workflow/ArcanistStartWorkflow.php',
+ 'ArcanistStaticThisXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistStaticThisXHPASTLinterRule.php',
'ArcanistStopWorkflow' => 'workflow/ArcanistStopWorkflow.php',
'ArcanistSubversionAPI' => 'repository/api/ArcanistSubversionAPI.php',
'ArcanistSubversionHookAPI' => 'repository/hookapi/ArcanistSubversionHookAPI.php',
'ArcanistSummaryLintRenderer' => 'lint/renderer/ArcanistSummaryLintRenderer.php',
'ArcanistSvnHookPreCommitWorkflow' => 'workflow/ArcanistSvnHookPreCommitWorkflow.php',
+ 'ArcanistSyntaxErrorXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistSyntaxErrorXHPASTLinterRule.php',
'ArcanistTasksWorkflow' => 'workflow/ArcanistTasksWorkflow.php',
+ 'ArcanistTautologicalExpressionXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistTautologicalExpressionXHPASTLinterRule.php',
'ArcanistTestCase' => 'infrastructure/testing/ArcanistTestCase.php',
'ArcanistTestResultParser' => 'unit/parser/ArcanistTestResultParser.php',
'ArcanistTextLinter' => 'lint/linter/ArcanistTextLinter.php',
'ArcanistTextLinterTestCase' => 'lint/linter/__tests__/ArcanistTextLinterTestCase.php',
'ArcanistTimeWorkflow' => 'workflow/ArcanistTimeWorkflow.php',
+ 'ArcanistTodoCommentXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistTodoCommentXHPASTLinterRule.php',
'ArcanistTodoWorkflow' => 'workflow/ArcanistTodoWorkflow.php',
+ 'ArcanistUnableToParseXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistUnableToParseXHPASTLinterRule.php',
'ArcanistUncommittedChangesException' => 'exception/usage/ArcanistUncommittedChangesException.php',
+ 'ArcanistUndeclaredVariableXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistUndeclaredVariableXHPASTLinterRule.php',
'ArcanistUnitConsoleRenderer' => 'unit/renderer/ArcanistUnitConsoleRenderer.php',
'ArcanistUnitRenderer' => 'unit/renderer/ArcanistUnitRenderer.php',
'ArcanistUnitTestEngine' => 'unit/engine/ArcanistUnitTestEngine.php',
@@ -194,6 +240,8 @@
'ArcanistUploadWorkflow' => 'workflow/ArcanistUploadWorkflow.php',
'ArcanistUsageException' => 'exception/ArcanistUsageException.php',
'ArcanistUserAbortException' => 'exception/usage/ArcanistUserAbortException.php',
+ 'ArcanistVariableReusedAsIteratorXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistVariableReusedAsIteratorXHPASTLinterRule.php',
+ 'ArcanistVariableVariableXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistVariableVariableXHPASTLinterRule.php',
'ArcanistVersionWorkflow' => 'workflow/ArcanistVersionWorkflow.php',
'ArcanistWhichWorkflow' => 'workflow/ArcanistWhichWorkflow.php',
'ArcanistWorkflow' => 'workflow/ArcanistWorkflow.php',
@@ -203,6 +251,7 @@
'ArcanistXHPASTLintSwitchHook' => 'lint/linter/xhpast/ArcanistXHPASTLintSwitchHook.php',
'ArcanistXHPASTLintTestSwitchHook' => 'lint/linter/__tests__/ArcanistXHPASTLintTestSwitchHook.php',
'ArcanistXHPASTLinter' => 'lint/linter/ArcanistXHPASTLinter.php',
+ 'ArcanistXHPASTLinterRule' => 'lint/linter/xhpast/ArcanistXHPASTLinterRule.php',
'ArcanistXHPASTLinterTestCase' => 'lint/linter/__tests__/ArcanistXHPASTLinterTestCase.php',
'ArcanistXMLLinter' => 'lint/linter/ArcanistXMLLinter.php',
'ArcanistXMLLinterTestCase' => 'lint/linter/__tests__/ArcanistXMLLinterTestCase.php',
@@ -224,12 +273,17 @@
'ArcanistAmendWorkflow' => 'ArcanistWorkflow',
'ArcanistAnoidWorkflow' => 'ArcanistWorkflow',
'ArcanistArcanistLinterTestCase' => 'ArcanistLinterTestCase',
+ 'ArcanistArrayIndexSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistArraySeparatorXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistBackoutWorkflow' => 'ArcanistWorkflow',
'ArcanistBaseCommitParserTestCase' => 'ArcanistTestCase',
'ArcanistBaseUnitTestEngine' => 'ArcanistUnitTestEngine',
'ArcanistBaseWorkflow' => 'ArcanistWorkflow',
'ArcanistBaseXHPASTLinter' => 'ArcanistFutureLinter',
+ 'ArcanistBinaryExpressionSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistBlacklistedFunctionXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistBookmarkWorkflow' => 'ArcanistFeatureWorkflow',
+ 'ArcanistBraceFormattingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistBranchWorkflow' => 'ArcanistFeatureWorkflow',
'ArcanistBritishTestCase' => 'ArcanistTestCase',
'ArcanistBrowseWorkflow' => 'ArcanistWorkflow',
@@ -238,10 +292,13 @@
'ArcanistCSSLintLinterTestCase' => 'ArcanistExternalLinterTestCase',
'ArcanistCSharpLinter' => 'ArcanistLinter',
'ArcanistCallConduitWorkflow' => 'ArcanistWorkflow',
+ 'ArcanistCallFormattingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistCallTimePassByReferenceXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistCapabilityNotSupportedException' => 'Exception',
'ArcanistCheckstyleXMLLintRenderer' => 'ArcanistLintRenderer',
'ArcanistChmodLinter' => 'ArcanistLinter',
'ArcanistChmodLinterTestCase' => 'ArcanistArcanistLinterTestCase',
+ 'ArcanistClassFilenameMismatchXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistCloseRevisionWorkflow' => 'ArcanistWorkflow',
'ArcanistCloseWorkflow' => 'ArcanistWorkflow',
'ArcanistClosureLinter' => 'ArcanistExternalLinter',
@@ -249,28 +306,42 @@
'ArcanistCoffeeLintLinter' => 'ArcanistExternalLinter',
'ArcanistCoffeeLintLinterTestCase' => 'ArcanistExternalLinterTestCase',
'ArcanistCommentRemoverTestCase' => 'ArcanistTestCase',
+ 'ArcanistCommentSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistCommentStyleXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistCommitLinter' => 'ArcanistLinter',
'ArcanistCommitLinterTestCase' => 'ArcanistArcanistLinterTestCase',
'ArcanistCommitWorkflow' => 'ArcanistWorkflow',
'ArcanistCompilerLikeLintRenderer' => 'ArcanistLintRenderer',
+ 'ArcanistConcatenationSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistConduitLinter' => 'ArcanistLinter',
'ArcanistConfigurationDrivenLintEngine' => 'ArcanistLintEngine',
'ArcanistConsoleLintRenderer' => 'ArcanistLintRenderer',
+ 'ArcanistConstructorParenthesesXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistControlStatementSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistCoverWorkflow' => 'ArcanistWorkflow',
'ArcanistCppcheckLinter' => 'ArcanistExternalLinter',
'ArcanistCppcheckLinterTestCase' => 'ArcanistExternalLinterTestCase',
'ArcanistCpplintLinter' => 'ArcanistExternalLinter',
'ArcanistCpplintLinterTestCase' => 'ArcanistExternalLinterTestCase',
+ 'ArcanistDeclarationFormattingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistDiffParserTestCase' => 'ArcanistTestCase',
'ArcanistDiffUtilsTestCase' => 'ArcanistTestCase',
'ArcanistDiffWorkflow' => 'ArcanistWorkflow',
'ArcanistDifferentialCommitMessageParserException' => 'Exception',
'ArcanistDifferentialDependencyGraph' => 'AbstractDirectedGraph',
+ 'ArcanistDoubleQuoteXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistDownloadWorkflow' => 'ArcanistWorkflow',
+ 'ArcanistDuplicateKeysInArrayXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistDuplicateSwitchCaseXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistDynamicDefineXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistElseIfUsageXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistEmptyBlockStatementXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistEventType' => 'PhutilEventType',
+ 'ArcanistExitExpressionXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistExportWorkflow' => 'ArcanistWorkflow',
'ArcanistExternalLinter' => 'ArcanistFutureLinter',
'ArcanistExternalLinterTestCase' => 'ArcanistLinterTestCase',
+ 'ArcanistExtractUsageXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistFeatureWorkflow' => 'ArcanistWorkflow',
'ArcanistFilenameLinter' => 'ArcanistLinter',
'ArcanistFilenameLinterTestCase' => 'ArcanistArcanistLinterTestCase',
@@ -292,6 +363,9 @@
'ArcanistHelpWorkflow' => 'ArcanistWorkflow',
'ArcanistHgClientChannel' => 'PhutilProtocolChannel',
'ArcanistHgServerChannel' => 'PhutilProtocolChannel',
+ 'ArcanistImplicitConstructorXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistImplicitFallthroughXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistImplicitVisibilityXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistInstallCertificateWorkflow' => 'ArcanistWorkflow',
'ArcanistJSHintLinter' => 'ArcanistExternalLinter',
'ArcanistJSHintLinterTestCase' => 'ArcanistExternalLinterTestCase',
@@ -302,7 +376,9 @@
'ArcanistJSONLinterTestCase' => 'ArcanistArcanistLinterTestCase',
'ArcanistJscsLinter' => 'ArcanistExternalLinter',
'ArcanistJscsLinterTestCase' => 'ArcanistExternalLinterTestCase',
+ 'ArcanistKeywordCasingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistLandWorkflow' => 'ArcanistWorkflow',
+ 'ArcanistLanguageConstructParenthesesXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistLesscLinter' => 'ArcanistExternalLinter',
'ArcanistLesscLinterTestCase' => 'ArcanistExternalLinterTestCase',
'ArcanistLiberateWorkflow' => 'ArcanistWorkflow',
@@ -316,6 +392,7 @@
'ArcanistMergeConflictLinter' => 'ArcanistLinter',
'ArcanistMergeConflictLinterTestCase' => 'ArcanistArcanistLinterTestCase',
'ArcanistMissingLinterException' => 'Exception',
+ 'ArcanistNamingConventionXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistNoEffectException' => 'ArcanistUsageException',
'ArcanistNoEngineException' => 'ArcanistUsageException',
'ArcanistNoLintLinter' => 'ArcanistLinter',
@@ -323,6 +400,12 @@
'ArcanistNoneLintRenderer' => 'ArcanistLintRenderer',
'ArcanistPEP8Linter' => 'ArcanistExternalLinter',
'ArcanistPEP8LinterTestCase' => 'ArcanistExternalLinterTestCase',
+ 'ArcanistPHPCloseTagXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistPHPCompatibilityXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistPHPEchoTagXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistPHPOpenTagXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistPHPShortTagXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistParenthesesSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistPasteWorkflow' => 'ArcanistWorkflow',
'ArcanistPatchWorkflow' => 'ArcanistWorkflow',
'ArcanistPhpLinter' => 'ArcanistExternalLinter',
@@ -337,6 +420,8 @@
'ArcanistPhutilTestTerminatedException' => 'Exception',
'ArcanistPhutilXHPASTLinter' => 'ArcanistBaseXHPASTLinter',
'ArcanistPhutilXHPASTLinterTestCase' => 'ArcanistArcanistLinterTestCase',
+ 'ArcanistPlusOperatorOnStringsXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistPregQuoteMisuseXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistPuppetLintLinter' => 'ArcanistExternalLinter',
'ArcanistPuppetLintLinterTestCase' => 'ArcanistExternalLinterTestCase',
'ArcanistPyFlakesLinter' => 'ArcanistExternalLinter',
@@ -345,28 +430,38 @@
'ArcanistPyLintLinterTestCase' => 'ArcanistExternalLinterTestCase',
'ArcanistRepositoryAPIMiscTestCase' => 'ArcanistTestCase',
'ArcanistRepositoryAPIStateTestCase' => 'ArcanistTestCase',
+ 'ArcanistReusedIteratorReferenceXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistReusedIteratorsXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistRevertWorkflow' => 'ArcanistWorkflow',
'ArcanistRubyLinter' => 'ArcanistExternalLinter',
'ArcanistRubyLinterTestCase' => 'ArcanistExternalLinterTestCase',
'ArcanistScriptAndRegexLinter' => 'ArcanistLinter',
+ 'ArcanistSemicolonSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistSetConfigWorkflow' => 'ArcanistWorkflow',
'ArcanistShellCompleteWorkflow' => 'ArcanistWorkflow',
'ArcanistSingleLintEngine' => 'ArcanistLintEngine',
+ 'ArcanistSlownessXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistSpellingLinter' => 'ArcanistLinter',
'ArcanistSpellingLinterTestCase' => 'ArcanistArcanistLinterTestCase',
'ArcanistStartWorkflow' => 'ArcanistPhrequentWorkflow',
+ 'ArcanistStaticThisXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistStopWorkflow' => 'ArcanistPhrequentWorkflow',
'ArcanistSubversionAPI' => 'ArcanistRepositoryAPI',
'ArcanistSubversionHookAPI' => 'ArcanistHookAPI',
'ArcanistSummaryLintRenderer' => 'ArcanistLintRenderer',
'ArcanistSvnHookPreCommitWorkflow' => 'ArcanistWorkflow',
+ 'ArcanistSyntaxErrorXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistTasksWorkflow' => 'ArcanistWorkflow',
+ 'ArcanistTautologicalExpressionXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistTestCase' => 'ArcanistPhutilTestCase',
'ArcanistTextLinter' => 'ArcanistLinter',
'ArcanistTextLinterTestCase' => 'ArcanistArcanistLinterTestCase',
'ArcanistTimeWorkflow' => 'ArcanistPhrequentWorkflow',
+ 'ArcanistTodoCommentXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistTodoWorkflow' => 'ArcanistWorkflow',
+ 'ArcanistUnableToParseXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistUncommittedChangesException' => 'ArcanistUsageException',
+ 'ArcanistUndeclaredVariableXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistUnitConsoleRenderer' => 'ArcanistUnitRenderer',
'ArcanistUnitTestableLintEngine' => 'ArcanistLintEngine',
'ArcanistUnitWorkflow' => 'ArcanistWorkflow',
@@ -374,6 +469,8 @@
'ArcanistUploadWorkflow' => 'ArcanistWorkflow',
'ArcanistUsageException' => 'Exception',
'ArcanistUserAbortException' => 'ArcanistUsageException',
+ 'ArcanistVariableReusedAsIteratorXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+ 'ArcanistVariableVariableXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
'ArcanistVersionWorkflow' => 'ArcanistWorkflow',
'ArcanistWhichWorkflow' => 'ArcanistWorkflow',
'ArcanistWorkflow' => 'Phobject',
diff --git a/src/lint/linter/ArcanistXHPASTLinter.php b/src/lint/linter/ArcanistXHPASTLinter.php
--- a/src/lint/linter/ArcanistXHPASTLinter.php
+++ b/src/lint/linter/ArcanistXHPASTLinter.php
@@ -5,60 +5,11 @@
*/
final class ArcanistXHPASTLinter extends ArcanistBaseXHPASTLinter {
- const LINT_PHP_SYNTAX_ERROR = 1;
- const LINT_UNABLE_TO_PARSE = 2;
- const LINT_VARIABLE_VARIABLE = 3;
- const LINT_EXTRACT_USE = 4;
- const LINT_UNDECLARED_VARIABLE = 5;
- const LINT_PHP_SHORT_TAG = 6;
- const LINT_PHP_ECHO_TAG = 7;
- const LINT_PHP_CLOSE_TAG = 8;
- const LINT_NAMING_CONVENTIONS = 9;
- const LINT_IMPLICIT_CONSTRUCTOR = 10;
- const LINT_DYNAMIC_DEFINE = 12;
- const LINT_STATIC_THIS = 13;
- const LINT_PREG_QUOTE_MISUSE = 14;
- const LINT_PHP_OPEN_TAG = 15;
- const LINT_TODO_COMMENT = 16;
- const LINT_EXIT_EXPRESSION = 17;
- const LINT_COMMENT_STYLE = 18;
- const LINT_CLASS_FILENAME_MISMATCH = 19;
- const LINT_TAUTOLOGICAL_EXPRESSION = 20;
- const LINT_PLUS_OPERATOR_ON_STRINGS = 21;
- const LINT_DUPLICATE_KEYS_IN_ARRAY = 22;
- const LINT_REUSED_ITERATORS = 23;
- const LINT_BRACE_FORMATTING = 24;
- const LINT_PARENTHESES_SPACING = 25;
- const LINT_CONTROL_STATEMENT_SPACING = 26;
- const LINT_BINARY_EXPRESSION_SPACING = 27;
- const LINT_ARRAY_INDEX_SPACING = 28;
- const LINT_IMPLICIT_FALLTHROUGH = 30;
- const LINT_REUSED_AS_ITERATOR = 32;
- const LINT_COMMENT_SPACING = 34;
- const LINT_SLOWNESS = 36;
- const LINT_CLOSING_CALL_PAREN = 37;
- const LINT_CLOSING_DECL_PAREN = 38;
- const LINT_REUSED_ITERATOR_REFERENCE = 39;
- const LINT_KEYWORD_CASING = 40;
- const LINT_DOUBLE_QUOTE = 41;
- const LINT_ELSEIF_USAGE = 42;
- const LINT_SEMICOLON_SPACING = 43;
- const LINT_CONCATENATION_OPERATOR = 44;
- const LINT_PHP_COMPATIBILITY = 45;
- const LINT_LANGUAGE_CONSTRUCT_PAREN = 46;
- const LINT_EMPTY_STATEMENT = 47;
- const LINT_ARRAY_SEPARATOR = 48;
- const LINT_CONSTRUCTOR_PARENTHESES = 49;
- const LINT_DUPLICATE_SWITCH_CASE = 50;
- const LINT_BLACKLISTED_FUNCTION = 51;
- const LINT_IMPLICIT_VISIBILITY = 52;
- const LINT_CALL_TIME_PASS_BY_REF = 53;
+ private $rules = array();
- private $blacklistedFunctions = array();
- private $naminghook;
- private $switchhook;
- private $version;
- private $windowsVersion;
+ public function __construct() {
+ $this->rules = self::getLinterRules();
+ }
public function getInfoName() {
return 'XHPAST Lint';
@@ -68,59 +19,6 @@
return pht('Use XHPAST to enforce coding conventions on PHP source files.');
}
- public function getLintNameMap() {
- return array(
- self::LINT_PHP_SYNTAX_ERROR => 'PHP Syntax Error!',
- self::LINT_UNABLE_TO_PARSE => 'Unable to Parse',
- self::LINT_VARIABLE_VARIABLE => 'Use of Variable Variable',
- self::LINT_EXTRACT_USE => 'Use of extract()',
- self::LINT_UNDECLARED_VARIABLE => 'Use of Undeclared Variable',
- self::LINT_PHP_SHORT_TAG => 'Use of Short Tag "<?"',
- self::LINT_PHP_ECHO_TAG => 'Use of Echo Tag "<?="',
- self::LINT_PHP_CLOSE_TAG => 'Use of Close Tag "?>"',
- self::LINT_NAMING_CONVENTIONS => 'Naming Conventions',
- self::LINT_IMPLICIT_CONSTRUCTOR => 'Implicit Constructor',
- self::LINT_DYNAMIC_DEFINE => 'Dynamic define()',
- self::LINT_STATIC_THIS => 'Use of $this in Static Context',
- self::LINT_PREG_QUOTE_MISUSE => 'Misuse of preg_quote()',
- self::LINT_PHP_OPEN_TAG => 'Expected Open Tag',
- self::LINT_TODO_COMMENT => 'TODO Comment',
- self::LINT_EXIT_EXPRESSION => 'Exit Used as Expression',
- self::LINT_COMMENT_STYLE => 'Comment Style',
- self::LINT_CLASS_FILENAME_MISMATCH => 'Class-Filename Mismatch',
- self::LINT_TAUTOLOGICAL_EXPRESSION => 'Tautological Expression',
- self::LINT_PLUS_OPERATOR_ON_STRINGS => 'Not String Concatenation',
- self::LINT_DUPLICATE_KEYS_IN_ARRAY => 'Duplicate Keys in Array',
- self::LINT_REUSED_ITERATORS => 'Reuse of Iterator Variable',
- self::LINT_BRACE_FORMATTING => 'Brace placement',
- self::LINT_PARENTHESES_SPACING => 'Spaces Inside Parentheses',
- self::LINT_CONTROL_STATEMENT_SPACING => 'Space After Control Statement',
- self::LINT_BINARY_EXPRESSION_SPACING => 'Space Around Binary Operator',
- self::LINT_ARRAY_INDEX_SPACING => 'Spacing Before Array Index',
- self::LINT_IMPLICIT_FALLTHROUGH => 'Implicit Fallthrough',
- self::LINT_REUSED_AS_ITERATOR => 'Variable Reused As Iterator',
- self::LINT_COMMENT_SPACING => 'Comment Spaces',
- self::LINT_SLOWNESS => 'Slow Construct',
- self::LINT_CLOSING_CALL_PAREN => 'Call Formatting',
- self::LINT_CLOSING_DECL_PAREN => 'Declaration Formatting',
- self::LINT_REUSED_ITERATOR_REFERENCE => 'Reuse of Iterator References',
- self::LINT_KEYWORD_CASING => 'Keyword Conventions',
- self::LINT_DOUBLE_QUOTE => 'Unnecessary Double Quotes',
- self::LINT_ELSEIF_USAGE => 'ElseIf Usage',
- self::LINT_SEMICOLON_SPACING => 'Semicolon Spacing',
- self::LINT_CONCATENATION_OPERATOR => 'Concatenation Spacing',
- self::LINT_PHP_COMPATIBILITY => 'PHP Compatibility',
- self::LINT_LANGUAGE_CONSTRUCT_PAREN => 'Language Construct Parentheses',
- self::LINT_EMPTY_STATEMENT => 'Empty Block Statement',
- self::LINT_ARRAY_SEPARATOR => 'Array Separator',
- self::LINT_CONSTRUCTOR_PARENTHESES => 'Constructor Parentheses',
- self::LINT_DUPLICATE_SWITCH_CASE => 'Duplicate Case Statements',
- self::LINT_BLACKLISTED_FUNCTION => 'Use of Blacklisted Function',
- self::LINT_IMPLICIT_VISIBILITY => 'Implicit Method Visibility',
- self::LINT_CALL_TIME_PASS_BY_REF => 'Call-Time Pass-By-Reference',
- );
- }
-
public function getLinterName() {
return 'XHP';
}
@@ -129,2990 +27,105 @@
return 'xhpast';
}
- public function getLintSeverityMap() {
- $disabled = ArcanistLintSeverity::SEVERITY_DISABLED;
- $advice = ArcanistLintSeverity::SEVERITY_ADVICE;
- $warning = ArcanistLintSeverity::SEVERITY_WARNING;
+ public function getLintNameMap() {
+ return mpull($this->rules, 'getLintName', 'getLintID');
+ }
- return array(
- self::LINT_TODO_COMMENT => $disabled,
- self::LINT_UNABLE_TO_PARSE => $warning,
- self::LINT_NAMING_CONVENTIONS => $warning,
- self::LINT_PREG_QUOTE_MISUSE => $advice,
- self::LINT_BRACE_FORMATTING => $warning,
- self::LINT_PARENTHESES_SPACING => $warning,
- self::LINT_CONTROL_STATEMENT_SPACING => $warning,
- self::LINT_BINARY_EXPRESSION_SPACING => $warning,
- self::LINT_ARRAY_INDEX_SPACING => $warning,
- self::LINT_IMPLICIT_FALLTHROUGH => $warning,
- self::LINT_SLOWNESS => $warning,
- self::LINT_COMMENT_SPACING => $advice,
- self::LINT_CLOSING_CALL_PAREN => $warning,
- self::LINT_CLOSING_DECL_PAREN => $warning,
- self::LINT_REUSED_ITERATOR_REFERENCE => $warning,
- self::LINT_KEYWORD_CASING => $warning,
- self::LINT_DOUBLE_QUOTE => $advice,
- self::LINT_ELSEIF_USAGE => $advice,
- self::LINT_SEMICOLON_SPACING => $advice,
- self::LINT_CONCATENATION_OPERATOR => $warning,
- self::LINT_LANGUAGE_CONSTRUCT_PAREN => $warning,
- self::LINT_EMPTY_STATEMENT => $advice,
- self::LINT_ARRAY_SEPARATOR => $advice,
- self::LINT_CONSTRUCTOR_PARENTHESES => $advice,
- self::LINT_IMPLICIT_VISIBILITY => $advice,
- );
+ public function getLintSeverityMap() {
+ return mpull($this->rules, 'getLintSeverity', 'getLintID');
}
public function getLinterConfigurationOptions() {
- return parent::getLinterConfigurationOptions() + array(
- 'xhpast.blacklisted.function' => array(
- 'type' => 'optional map<string, string>',
- 'help' => pht('Blacklisted functions which should not be used.'),
- ),
- 'xhpast.naminghook' => array(
- 'type' => 'optional string',
- 'help' => pht(
- 'Name of a concrete subclass of ArcanistXHPASTLintNamingHook which '.
- 'enforces more granular naming convention rules for symbols.'),
- ),
- 'xhpast.switchhook' => array(
- 'type' => 'optional string',
- 'help' => pht(
- 'Name of a concrete subclass of ArcanistXHPASTLintSwitchHook which '.
- 'tunes the analysis of switch() statements for this linter.'),
- ),
- 'xhpast.php-version' => array(
- 'type' => 'optional string',
- 'help' => pht('PHP version to target.'),
- ),
- 'xhpast.php-version.windows' => array(
- 'type' => 'optional string',
- 'help' => pht('PHP version to target on Windows.'),
- ),
- );
+ return parent::getLinterConfigurationOptions() + array_mergev(
+ mpull($this->rules, 'getLinterConfigurationOptions'));
}
public function setLinterConfigurationValue($key, $value) {
- switch ($key) {
- case 'xhpast.blacklisted.function':
- $this->blacklistedFunctions = $value;
- return;
- case 'xhpast.naminghook':
- $this->naminghook = $value;
- return;
- case 'xhpast.switchhook':
- $this->switchhook = $value;
- return;
- case 'xhpast.php-version':
- $this->version = $value;
- return;
- case 'xhpast.php-version.windows':
- $this->windowsVersion = $value;
- return;
- }
-
- return parent::setLinterConfigurationValue($key, $value);
- }
-
- public function getVersion() {
- // The version number should be incremented whenever a new rule is added.
- return '15';
- }
-
- protected function resolveFuture($path, Future $future) {
- $tree = $this->getXHPASTTreeForPath($path);
- if (!$tree) {
- $ex = $this->getXHPASTExceptionForPath($path);
- if ($ex instanceof XHPASTSyntaxErrorException) {
- $this->raiseLintAtLine(
- $ex->getErrorLine(),
- 1,
- self::LINT_PHP_SYNTAX_ERROR,
- 'This file contains a syntax error: '.$ex->getMessage());
- } else if ($ex instanceof Exception) {
- $this->raiseLintAtPath(self::LINT_UNABLE_TO_PARSE, $ex->getMessage());
- }
- return;
- }
-
- $root = $tree->getRootNode();
-
- $method_codes = array(
- 'lintStrstrUsedForCheck' => self::LINT_SLOWNESS,
- 'lintStrposUsedForStart' => self::LINT_SLOWNESS,
- 'lintImplicitFallthrough' => self::LINT_IMPLICIT_FALLTHROUGH,
- 'lintBraceFormatting' => self::LINT_BRACE_FORMATTING,
- 'lintTautologicalExpressions' => self::LINT_TAUTOLOGICAL_EXPRESSION,
- 'lintCommentSpaces' => self::LINT_COMMENT_SPACING,
- 'lintHashComments' => self::LINT_COMMENT_STYLE,
- 'lintReusedIterators' => self::LINT_REUSED_ITERATORS,
- 'lintReusedIteratorReferences' => self::LINT_REUSED_ITERATOR_REFERENCE,
- 'lintVariableVariables' => self::LINT_VARIABLE_VARIABLE,
- 'lintUndeclaredVariables' => array(
- self::LINT_EXTRACT_USE,
- self::LINT_REUSED_AS_ITERATOR,
- self::LINT_UNDECLARED_VARIABLE,
- ),
- 'lintPHPTagUse' => array(
- self::LINT_PHP_SHORT_TAG,
- self::LINT_PHP_ECHO_TAG,
- self::LINT_PHP_OPEN_TAG,
- self::LINT_PHP_CLOSE_TAG,
- ),
- 'lintNamingConventions' => self::LINT_NAMING_CONVENTIONS,
- 'lintSurpriseConstructors' => self::LINT_IMPLICIT_CONSTRUCTOR,
- 'lintParenthesesShouldHugExpressions' => self::LINT_PARENTHESES_SPACING,
- 'lintSpaceAfterControlStatementKeywords' =>
- self::LINT_CONTROL_STATEMENT_SPACING,
- 'lintSpaceAroundBinaryOperators' => self::LINT_BINARY_EXPRESSION_SPACING,
- 'lintDynamicDefines' => self::LINT_DYNAMIC_DEFINE,
- 'lintUseOfThisInStaticMethods' => self::LINT_STATIC_THIS,
- 'lintPregQuote' => self::LINT_PREG_QUOTE_MISUSE,
- 'lintExitExpressions' => self::LINT_EXIT_EXPRESSION,
- 'lintArrayIndexWhitespace' => self::LINT_ARRAY_INDEX_SPACING,
- 'lintTODOComments' => self::LINT_TODO_COMMENT,
- 'lintPrimaryDeclarationFilenameMatch' =>
- self::LINT_CLASS_FILENAME_MISMATCH,
- 'lintPlusOperatorOnStrings' => self::LINT_PLUS_OPERATOR_ON_STRINGS,
- 'lintDuplicateKeysInArray' => self::LINT_DUPLICATE_KEYS_IN_ARRAY,
- 'lintClosingCallParen' => self::LINT_CLOSING_CALL_PAREN,
- 'lintClosingDeclarationParen' => self::LINT_CLOSING_DECL_PAREN,
- 'lintKeywordCasing' => self::LINT_KEYWORD_CASING,
- 'lintStrings' => self::LINT_DOUBLE_QUOTE,
- 'lintElseIfStatements' => self::LINT_ELSEIF_USAGE,
- 'lintSemicolons' => self::LINT_SEMICOLON_SPACING,
- 'lintSpaceAroundConcatenationOperators' =>
- self::LINT_CONCATENATION_OPERATOR,
- 'lintPHPCompatibility' => self::LINT_PHP_COMPATIBILITY,
- 'lintLanguageConstructParentheses' => self::LINT_LANGUAGE_CONSTRUCT_PAREN,
- 'lintEmptyBlockStatements' => self::LINT_EMPTY_STATEMENT,
- 'lintArraySeparator' => self::LINT_ARRAY_SEPARATOR,
- 'lintConstructorParentheses' => self::LINT_CONSTRUCTOR_PARENTHESES,
- 'lintSwitchStatements' => self::LINT_DUPLICATE_SWITCH_CASE,
- 'lintBlacklistedFunction' => self::LINT_BLACKLISTED_FUNCTION,
- 'lintMethodModifier' => self::LINT_IMPLICIT_VISIBILITY,
- 'lintPropertyModifier' => self::LINT_IMPLICIT_VISIBILITY,
- 'lintCallTimePassByReference' => self::LINT_CALL_TIME_PASS_BY_REF,
- );
-
- foreach ($method_codes as $method => $codes) {
- foreach ((array)$codes as $code) {
- if ($this->isCodeEnabled($code)) {
- call_user_func(array($this, $method), $root);
- break;
- }
- }
- }
- }
-
- private function lintStrstrUsedForCheck(XHPASTNode $root) {
- $expressions = $root->selectDescendantsOfType('n_BINARY_EXPRESSION');
- foreach ($expressions as $expression) {
- $operator = $expression->getChildOfType(1, 'n_OPERATOR');
- $operator = $operator->getConcreteString();
-
- if ($operator !== '===' && $operator !== '!==') {
- continue;
- }
-
- $false = $expression->getChildByIndex(0);
- if ($false->getTypeName() === 'n_SYMBOL_NAME' &&
- $false->getConcreteString() === 'false') {
- $strstr = $expression->getChildByIndex(2);
- } else {
- $strstr = $false;
- $false = $expression->getChildByIndex(2);
- if ($false->getTypeName() !== 'n_SYMBOL_NAME' ||
- $false->getConcreteString() !== 'false') {
- continue;
- }
- }
-
- if ($strstr->getTypeName() !== 'n_FUNCTION_CALL') {
- continue;
- }
-
- $name = strtolower($strstr->getChildByIndex(0)->getConcreteString());
- if ($name === 'strstr' || $name === 'strchr') {
- $this->raiseLintAtNode(
- $strstr,
- self::LINT_SLOWNESS,
- 'Use strpos() for checking if the string contains something.');
- } else if ($name === 'stristr') {
- $this->raiseLintAtNode(
- $strstr,
- self::LINT_SLOWNESS,
- 'Use stripos() for checking if the string contains something.');
- }
- }
- }
-
- private function lintStrposUsedForStart(XHPASTNode $root) {
- $expressions = $root->selectDescendantsOfType('n_BINARY_EXPRESSION');
- foreach ($expressions as $expression) {
- $operator = $expression->getChildOfType(1, 'n_OPERATOR');
- $operator = $operator->getConcreteString();
-
- if ($operator !== '===' && $operator !== '!==') {
- continue;
- }
-
- $zero = $expression->getChildByIndex(0);
- if ($zero->getTypeName() === 'n_NUMERIC_SCALAR' &&
- $zero->getConcreteString() === '0') {
- $strpos = $expression->getChildByIndex(2);
- } else {
- $strpos = $zero;
- $zero = $expression->getChildByIndex(2);
- if ($zero->getTypeName() !== 'n_NUMERIC_SCALAR' ||
- $zero->getConcreteString() !== '0') {
- continue;
- }
- }
-
- if ($strpos->getTypeName() !== 'n_FUNCTION_CALL') {
- continue;
- }
-
- $name = strtolower($strpos->getChildByIndex(0)->getConcreteString());
- if ($name === 'strpos') {
- $this->raiseLintAtNode(
- $strpos,
- self::LINT_SLOWNESS,
- 'Use strncmp() for checking if the string starts with something.');
- } else if ($name === 'stripos') {
- $this->raiseLintAtNode(
- $strpos,
- self::LINT_SLOWNESS,
- 'Use strncasecmp() for checking if the string starts with '.
- 'something.');
- }
- }
- }
-
- private function lintPHPCompatibility(XHPASTNode $root) {
- if (!$this->version) {
- return;
- }
-
- $target = phutil_get_library_root('phutil').
- '/../resources/php_compat_info.json';
- $compat_info = phutil_json_decode(Filesystem::readFile($target));
-
- // Create a whitelist for symbols which are being used conditionally.
- $whitelist = array(
- 'class' => array(),
- 'function' => array(),
- );
+ static $map;
- $conditionals = $root->selectDescendantsOfType('n_IF');
- foreach ($conditionals as $conditional) {
- $condition = $conditional->getChildOfType(0, 'n_CONTROL_CONDITION');
- $function = $condition->getChildByIndex(0);
+ if ($map === null) {
+ $map = array();
- if ($function->getTypeName() != 'n_FUNCTION_CALL') {
- continue;
- }
-
- $function_token = $function
- ->getChildByIndex(0);
-
- if ($function_token->getTypeName() != 'n_SYMBOL_NAME') {
- // This may be `Class::method(...)` or `$var(...)`.
- continue;
- }
-
- $function_name = $function_token->getConcreteString();
-
- switch ($function_name) {
- case 'class_exists':
- case 'function_exists':
- case 'interface_exists':
- $type = null;
- switch ($function_name) {
- case 'class_exists':
- $type = 'class';
- break;
-
- case 'function_exists':
- $type = 'function';
- break;
-
- case 'interface_exists':
- $type = 'interface';
- break;
- }
-
- $params = $function->getChildOfType(1, 'n_CALL_PARAMETER_LIST');
- $symbol = $params->getChildByIndex(0);
-
- if (!$symbol->isStaticScalar()) {
- continue;
- }
-
- $symbol_name = $symbol->evalStatic();
- if (!idx($whitelist[$type], $symbol_name)) {
- $whitelist[$type][$symbol_name] = array();
- }
-
- $span = $conditional
- ->getChildByIndex(1)
- ->getTokens();
-
- $whitelist[$type][$symbol_name][] = range(
- head_key($span),
- last_key($span));
- break;
- }
- }
-
- $calls = $root->selectDescendantsOfType('n_FUNCTION_CALL');
- foreach ($calls as $call) {
- $node = $call->getChildByIndex(0);
- $name = $node->getConcreteString();
-
- $version = idx($compat_info['functions'], $name, array());
- $min = idx($version, 'min');
- $max = idx($version, 'max');
-
- // Check if whitelisted.
- $whitelisted = false;
- foreach (idx($whitelist['function'], $name, array()) as $range) {
- if (array_intersect($range, array_keys($node->getTokens()))) {
- $whitelisted = true;
- break;
- }
- }
-
- if ($whitelisted) {
- continue;
- }
-
- if ($min && version_compare($min, $this->version, '>')) {
- $this->raiseLintAtNode(
- $node,
- self::LINT_PHP_COMPATIBILITY,
- pht(
- 'This codebase targets PHP %s, but `%s()` was not '.
- 'introduced until PHP %s.',
- $this->version,
- $name,
- $min));
- } else if ($max && version_compare($max, $this->version, '<')) {
- $this->raiseLintAtNode(
- $node,
- self::LINT_PHP_COMPATIBILITY,
- pht(
- 'This codebase targets PHP %s, but `%s()` was '.
- 'removed in PHP %s.',
- $this->version,
- $name,
- $max));
- } else if (array_key_exists($name, $compat_info['params'])) {
- $params = $call->getChildOfType(1, 'n_CALL_PARAMETER_LIST');
- foreach (array_values($params->getChildren()) as $i => $param) {
- $version = idx($compat_info['params'][$name], $i);
- if ($version && version_compare($version, $this->version, '>')) {
- $this->raiseLintAtNode(
- $param,
- self::LINT_PHP_COMPATIBILITY,
- pht(
- 'This codebase targets PHP %s, but parameter %d '.
- 'of `%s()` was not introduced until PHP %s.',
- $this->version,
- $i + 1,
- $name,
- $version));
- }
- }
- }
-
- if ($this->windowsVersion) {
- $windows = idx($compat_info['functions_windows'], $name);
-
- if ($windows === false) {
- $this->raiseLintAtNode(
- $node,
- self::LINT_PHP_COMPATIBILITY,
- pht(
- 'This codebase targets PHP %s on Windows, '.
- 'but `%s()` is not available there.',
- $this->windowsVersion,
- $name));
- } else if (version_compare($windows, $this->windowsVersion, '>')) {
- $this->raiseLintAtNode(
- $node,
- self::LINT_PHP_COMPATIBILITY,
- pht(
- 'This codebase targets PHP %s on Windows, '.
- 'but `%s()` is not available there until PHP %s.',
- $this->windowsVersion,
- $name,
- $windows));
- }
- }
- }
-
- $classes = $root->selectDescendantsOfType('n_CLASS_NAME');
- foreach ($classes as $node) {
- $name = $node->getConcreteString();
- $version = idx($compat_info['interfaces'], $name, array());
- $version = idx($compat_info['classes'], $name, $version);
- $min = idx($version, 'min');
- $max = idx($version, 'max');
- // Check if whitelisted.
- $whitelisted = false;
- foreach (idx($whitelist['class'], $name, array()) as $range) {
- if (array_intersect($range, array_keys($node->getTokens()))) {
- $whitelisted = true;
- break;
- }
- }
-
- if ($whitelisted) {
- continue;
+ foreach ($this->rules as $rule) {
+ foreach ($rule->getLinterConfigurationOptions() as $k => $spec) {
+ $map[$k] = $rule;
}
-
- if ($min && version_compare($min, $this->version, '>')) {
- $this->raiseLintAtNode(
- $node,
- self::LINT_PHP_COMPATIBILITY,
- pht(
- 'This codebase targets PHP %s, but `%s` was not '.
- 'introduced until PHP %s.',
- $this->version,
- $name,
- $min));
- } else if ($max && version_compare($max, $this->version, '<')) {
- $this->raiseLintAtNode(
- $node,
- self::LINT_PHP_COMPATIBILITY,
- pht(
- 'This codebase targets PHP %s, but `%s` was '.
- 'removed in PHP %s.',
- $this->version,
- $name,
- $max));
}
}
- // TODO: Technically, this will include function names. This is unlikely to
- // cause any issues (unless, of course, there existed a function that had
- // the same name as some constant).
- $constants = $root->selectDescendantsOfTypes(array(
- 'n_SYMBOL_NAME',
- 'n_MAGIC_SCALAR',
- ));
- foreach ($constants as $node) {
- $name = $node->getConcreteString();
- $version = idx($compat_info['constants'], $name, array());
- $min = idx($version, 'min');
- $max = idx($version, 'max');
-
- if ($min && version_compare($min, $this->version, '>')) {
- $this->raiseLintAtNode(
- $node,
- self::LINT_PHP_COMPATIBILITY,
- pht(
- 'This codebase targets PHP %s, but `%s` was not '.
- 'introduced until PHP %s.',
- $this->version,
- $name,
- $min));
- } else if ($max && version_compare($max, $this->version, '<')) {
- $this->raiseLintAtNode(
- $node,
- self::LINT_PHP_COMPATIBILITY,
- pht(
- 'This codebase targets PHP %s, but `%s` was '.
- 'removed in PHP %s.',
- $this->version,
- $name,
- $max));
- }
- }
-
- if (version_compare($this->version, '5.3.0') < 0) {
- $this->lintPHP53Features($root);
- } else {
- $this->lintPHP53Incompatibilities($root);
- }
+ $rule = idx($map, $key);
- if (version_compare($this->version, '5.4.0') < 0) {
- $this->lintPHP54Features($root);
+ if ($rule) {
+ $rule->setLinterConfigurationValue($key, $value);
} else {
- $this->lintPHP54Incompatibilities($root);
- }
- }
-
- private function lintPHP53Features(XHPASTNode $root) {
- $functions = $root->selectTokensOfType('T_FUNCTION');
- foreach ($functions as $function) {
- $next = $function->getNextToken();
- while ($next) {
- if ($next->isSemantic()) {
- break;
- }
- $next = $next->getNextToken();
- }
-
- if ($next) {
- if ($next->getTypeName() === '(') {
- $this->raiseLintAtToken(
- $function,
- self::LINT_PHP_COMPATIBILITY,
- "This codebase targets PHP {$this->version}, but anonymous ".
- "functions were not introduced until PHP 5.3.");
- }
- }
- }
-
- $namespaces = $root->selectTokensOfType('T_NAMESPACE');
- foreach ($namespaces as $namespace) {
- $this->raiseLintAtToken(
- $namespace,
- self::LINT_PHP_COMPATIBILITY,
- "This codebase targets PHP {$this->version}, but namespaces were not ".
- "introduced until PHP 5.3.");
- }
-
- // NOTE: This is only "use x;", in anonymous functions the node type is
- // n_LEXICAL_VARIABLE_LIST even though both tokens are T_USE.
-
- // TODO: We parse n_USE in a slightly crazy way right now; that would be
- // a better selector once it's fixed.
-
- $uses = $root->selectDescendantsOfType('n_USE_LIST');
- foreach ($uses as $use) {
- $this->raiseLintAtNode(
- $use,
- self::LINT_PHP_COMPATIBILITY,
- "This codebase targets PHP {$this->version}, but namespaces were not ".
- "introduced until PHP 5.3.");
- }
-
- $statics = $root->selectDescendantsOfType('n_CLASS_STATIC_ACCESS');
- foreach ($statics as $static) {
- $name = $static->getChildByIndex(0);
- if ($name->getTypeName() != 'n_CLASS_NAME') {
- continue;
- }
- if ($name->getConcreteString() === 'static') {
- $this->raiseLintAtNode(
- $name,
- self::LINT_PHP_COMPATIBILITY,
- "This codebase targets PHP {$this->version}, but `static::` was not ".
- "introduced until PHP 5.3.");
- }
- }
-
- $ternaries = $root->selectDescendantsOfType('n_TERNARY_EXPRESSION');
- foreach ($ternaries as $ternary) {
- $yes = $ternary->getChildByIndex(1);
- if ($yes->getTypeName() === 'n_EMPTY') {
- $this->raiseLintAtNode(
- $ternary,
- self::LINT_PHP_COMPATIBILITY,
- "This codebase targets PHP {$this->version}, but short ternary was ".
- "not introduced until PHP 5.3.");
- }
- }
-
- $heredocs = $root->selectDescendantsOfType('n_HEREDOC');
- foreach ($heredocs as $heredoc) {
- if (preg_match('/^<<<[\'"]/', $heredoc->getConcreteString())) {
- $this->raiseLintAtNode(
- $heredoc,
- self::LINT_PHP_COMPATIBILITY,
- "This codebase targets PHP {$this->version}, but nowdoc was not ".
- "introduced until PHP 5.3.");
- }
+ return parent::setLinterConfigurationValue($key, $value);
}
}
- private function lintPHP53Incompatibilities(XHPASTNode $root) {}
-
- private function lintPHP54Features(XHPASTNode $root) {
- $indexes = $root->selectDescendantsOfType('n_INDEX_ACCESS');
- foreach ($indexes as $index) {
- switch ($index->getChildByIndex(0)->getTypeName()) {
- case 'n_FUNCTION_CALL':
- case 'n_METHOD_CALL':
- $this->raiseLintAtNode(
- $index->getChildByIndex(1),
- self::LINT_PHP_COMPATIBILITY,
- pht(
- 'The `%s` syntax was not introduced until PHP 5.4, but this '.
- 'codebase targets an earlier version of PHP. You can rewrite '.
- 'this expression using `%s`.',
- 'f()[...]',
- 'idx()'));
- break;
- }
- }
+ public function getVersion() {
+ // TODO: Improve this.
+ return count($this->getLinterRules());
}
- private function lintPHP54Incompatibilities(XHPASTNode $root) {
- $breaks = $root->selectDescendantsOfTypes(array('n_BREAK', 'n_CONTINUE'));
- foreach ($breaks as $break) {
- $arg = $break->getChildByIndex(0);
+ public static function getLinterRules() {
+ static $rules;
- switch ($arg->getTypeName()) {
- case 'n_EMPTY':
- break;
+ if ($rules === null) {
+ $rules_map = id(new PhutilSymbolLoader())
+ ->setAncestorClass('ArcanistXHPASTLinterRule')
+ ->loadObjects();
- case 'n_NUMERIC_SCALAR':
- if ($arg->getConcreteString() != '0') {
- break;
- }
+ foreach ($rules_map as $class => $rule) {
+ $id = $rule->getLintID();
- default:
- $this->raiseLintAtNode(
- $break->getChildByIndex(0),
- self::LINT_PHP_COMPATIBILITY,
+ if (isset($rules_map[$id])) {
+ throw new Exception(
pht(
- 'The `%s` and `%s` statements no longer accept '.
- 'variable arguments.',
- 'break',
- 'continue'));
- break;
- }
- }
- }
-
- private function lintImplicitFallthrough(XHPASTNode $root) {
- $hook_obj = null;
- $working_copy = $this->getEngine()->getWorkingCopy();
- if ($working_copy) {
- $hook_class = $this->switchhook
- ? $this->switchhook
- : $this->getDeprecatedConfiguration('lint.xhpast.switchhook');
- if ($hook_class) {
- $hook_obj = newv($hook_class, array());
- assert_instances_of(array($hook_obj), 'ArcanistXHPASTLintSwitchHook');
- }
- }
-
- $switches = $root->selectDescendantsOfType('n_SWITCH');
- foreach ($switches as $switch) {
- $blocks = array();
-
- $cases = $switch->selectDescendantsOfType('n_CASE');
- foreach ($cases as $case) {
- $blocks[] = $case;
- }
-
- $defaults = $switch->selectDescendantsOfType('n_DEFAULT');
- foreach ($defaults as $default) {
- $blocks[] = $default;
- }
-
-
- foreach ($blocks as $key => $block) {
- // Collect all the tokens in this block which aren't at top level.
- // We want to ignore "break", and "continue" in these blocks.
- $lower_level = $block->selectDescendantsOfType('n_WHILE');
- $lower_level->add($block->selectDescendantsOfType('n_DO_WHILE'));
- $lower_level->add($block->selectDescendantsOfType('n_FOR'));
- $lower_level->add($block->selectDescendantsOfType('n_FOREACH'));
- $lower_level->add($block->selectDescendantsOfType('n_SWITCH'));
- $lower_level_tokens = array();
- foreach ($lower_level as $lower_level_block) {
- $lower_level_tokens += $lower_level_block->getTokens();
- }
-
- // Collect all the tokens in this block which aren't in this scope
- // (because they're inside class, function or interface declarations).
- // We want to ignore all of these tokens.
- $decls = $block->selectDescendantsOfType('n_FUNCTION_DECLARATION');
- $decls->add($block->selectDescendantsOfType('n_CLASS_DECLARATION'));
- // For completeness; these can't actually have anything.
- $decls->add($block->selectDescendantsOfType('n_INTERFACE_DECLARATION'));
- $different_scope_tokens = array();
- foreach ($decls as $decl) {
- $different_scope_tokens += $decl->getTokens();
- }
-
- $lower_level_tokens += $different_scope_tokens;
-
- // Get all the trailing nonsemantic tokens, since we need to look for
- // "fallthrough" comments past the end of the semantic block.
-
- $tokens = $block->getTokens();
- $last = end($tokens);
- while ($last && $last = $last->getNextToken()) {
- if ($last->isSemantic()) {
- break;
- }
- $tokens[$last->getTokenID()] = $last;
- }
-
- $blocks[$key] = array(
- $tokens,
- $lower_level_tokens,
- $different_scope_tokens,
- );
- }
-
- foreach ($blocks as $token_lists) {
- list(
- $tokens,
- $lower_level_tokens,
- $different_scope_tokens) = $token_lists;
-
- // Test each block (case or default statement) to see if it's OK. It's
- // OK if:
- //
- // - it is empty; or
- // - it ends in break, return, throw, continue or exit at top level; or
- // - it has a comment with "fallthrough" in its text.
-
- // Empty blocks are OK, so we start this at `true` and only set it to
- // false if we find a statement.
- $block_ok = true;
-
- // Keeps track of whether the current statement is one that validates
- // the block (break, return, throw, continue) or something else.
- $statement_ok = false;
-
- foreach ($tokens as $token_id => $token) {
- if (!$token->isSemantic()) {
- // Liberally match "fall" in the comment text so that comments like
- // "fallthru", "fall through", "fallthrough", etc., are accepted.
- if (preg_match('/fall/i', $token->getValue())) {
- $block_ok = true;
- break;
- }
- continue;
- }
-
- $tok_type = $token->getTypeName();
-
- if ($tok_type === 'T_FUNCTION' ||
- $tok_type === 'T_CLASS' ||
- $tok_type === 'T_INTERFACE') {
- // These aren't statements, but mark the block as nonempty anyway.
- $block_ok = false;
- continue;
- }
-
- if ($tok_type === ';') {
- if ($statement_ok) {
- $statment_ok = false;
- } else {
- $block_ok = false;
- }
- continue;
- }
-
- if ($tok_type === 'T_BREAK' ||
- $tok_type === 'T_CONTINUE') {
- if (empty($lower_level_tokens[$token_id])) {
- $statement_ok = true;
- $block_ok = true;
- }
- continue;
- }
-
- if ($tok_type === 'T_RETURN' ||
- $tok_type === 'T_THROW' ||
- $tok_type === 'T_EXIT' ||
- ($hook_obj && $hook_obj->checkSwitchToken($token))) {
- if (empty($different_scope_tokens[$token_id])) {
- $statement_ok = true;
- $block_ok = true;
- }
- continue;
- }
- }
-
- if (!$block_ok) {
- $this->raiseLintAtToken(
- head($tokens),
- self::LINT_IMPLICIT_FALLTHROUGH,
- "This 'case' or 'default' has a nonempty block which does not ".
- "end with 'break', 'continue', 'return', 'throw' or 'exit'. Did ".
- "you forget to add one of those? If you intend to fall through, ".
- "add a '// fallthrough' comment to silence this warning.");
- }
- }
- }
- }
-
- private function lintBraceFormatting(XHPASTNode $root) {
- foreach ($root->selectDescendantsOfType('n_STATEMENT_LIST') as $list) {
- $tokens = $list->getTokens();
- if (!$tokens || head($tokens)->getValue() != '{') {
- continue;
- }
- list($before, $after) = $list->getSurroundingNonsemanticTokens();
- if (!$before) {
- $first = head($tokens);
-
- // Only insert the space if we're after a closing parenthesis. If
- // we're in a construct like "else{}", other rules will insert space
- // after the 'else' correctly.
- $prev = $first->getPrevToken();
- if (!$prev || $prev->getValue() !== ')') {
- continue;
- }
-
- $this->raiseLintAtToken(
- $first,
- self::LINT_BRACE_FORMATTING,
- 'Put opening braces on the same line as control statements and '.
- 'declarations, with a single space before them.',
- ' '.$first->getValue());
- } else if (count($before) === 1) {
- $before = reset($before);
- if ($before->getValue() !== ' ') {
- $this->raiseLintAtToken(
- $before,
- self::LINT_BRACE_FORMATTING,
- 'Put opening braces on the same line as control statements and '.
- 'declarations, with a single space before them.',
- ' ');
- }
- }
- }
-
- $nodes = $root->selectDescendantsOfType('n_STATEMENT');
- foreach ($nodes as $node) {
- $parent = $node->getParentNode();
-
- if (!$parent) {
- continue;
- }
-
- $type = $parent->getTypeName();
- if ($type != 'n_STATEMENT_LIST' && $type != 'n_DECLARE') {
- $this->raiseLintAtNode(
- $node,
- self::LINT_BRACE_FORMATTING,
- 'Use braces to surround a statement block.');
- }
- }
-
- $nodes = $root->selectDescendantsOfTypes(array(
- 'n_DO_WHILE',
- 'n_ELSE',
- 'n_ELSEIF',
- ));
- foreach ($nodes as $list) {
- $tokens = $list->getTokens();
- if (!$tokens || last($tokens)->getValue() != '}') {
- continue;
- }
- list($before, $after) = $list->getSurroundingNonsemanticTokens();
- if (!$before) {
- $first = last($tokens);
-
- $this->raiseLintAtToken(
- $first,
- self::LINT_BRACE_FORMATTING,
- 'Put opening braces on the same line as control statements and '.
- 'declarations, with a single space before them.',
- ' '.$first->getValue());
- } else if (count($before) === 1) {
- $before = reset($before);
- if ($before->getValue() !== ' ') {
- $this->raiseLintAtToken(
- $before,
- self::LINT_BRACE_FORMATTING,
- 'Put opening braces on the same line as control statements and '.
- 'declarations, with a single space before them.',
- ' ');
- }
- }
- }
- }
-
- private function lintTautologicalExpressions(XHPASTNode $root) {
- $expressions = $root->selectDescendantsOfType('n_BINARY_EXPRESSION');
-
- static $operators = array(
- '-' => true,
- '/' => true,
- '-=' => true,
- '/=' => true,
- '<=' => true,
- '<' => true,
- '==' => true,
- '===' => true,
- '!=' => true,
- '!==' => true,
- '>=' => true,
- '>' => true,
- );
-
- static $logical = array(
- '||' => true,
- '&&' => true,
- );
-
- foreach ($expressions as $expr) {
- $operator = $expr->getChildByIndex(1)->getConcreteString();
- if (!empty($operators[$operator])) {
- $left = $expr->getChildByIndex(0)->getSemanticString();
- $right = $expr->getChildByIndex(2)->getSemanticString();
-
- if ($left === $right) {
- $this->raiseLintAtNode(
- $expr,
- self::LINT_TAUTOLOGICAL_EXPRESSION,
- 'Both sides of this expression are identical, so it always '.
- 'evaluates to a constant.');
+ 'Two linter rules (`%s`, `%s`) share the same lint ID (%d). '.
+ 'Each linter rule must have a unique ID.',
+ $class,
+ get_class($rules_map[$id]),
+ $id));
}
- }
-
- if (!empty($logical[$operator])) {
- $left = $expr->getChildByIndex(0)->getSemanticString();
- $right = $expr->getChildByIndex(2)->getSemanticString();
-
- // NOTE: These will be null to indicate "could not evaluate".
- $left = $this->evaluateStaticBoolean($left);
- $right = $this->evaluateStaticBoolean($right);
- if (($operator === '||' && ($left === true || $right === true)) ||
- ($operator === '&&' && ($left === false || $right === false))) {
- $this->raiseLintAtNode(
- $expr,
- self::LINT_TAUTOLOGICAL_EXPRESSION,
- 'The logical value of this expression is static. Did you forget '.
- 'to remove some debugging code?');
- }
+ $rules_map[$id] = $rule;
}
- }
- }
-
- /**
- * Statically evaluate a boolean value from an XHP tree.
- *
- * TODO: Improve this and move it to XHPAST proper?
- *
- * @param string The "semantic string" of a single value.
- * @return mixed ##true## or ##false## if the value could be evaluated
- * statically; ##null## if static evaluation was not possible.
- */
- private function evaluateStaticBoolean($string) {
- switch (strtolower($string)) {
- case '0':
- case 'null':
- case 'false':
- return false;
- case '1':
- case 'true':
- return true;
- }
- return null;
- }
-
- protected function lintCommentSpaces(XHPASTNode $root) {
- foreach ($root->selectTokensOfType('T_COMMENT') as $comment) {
- $value = $comment->getValue();
- if ($value[0] !== '#') {
- $match = null;
- if (preg_match('@^(/[/*]+)[^/*\s]@', $value, $match)) {
- $this->raiseLintAtOffset(
- $comment->getOffset(),
- self::LINT_COMMENT_SPACING,
- 'Put space after comment start.',
- $match[1],
- $match[1].' ');
- }
- }
+ $rules = $rules_map;
}
- }
-
-
- protected function lintHashComments(XHPASTNode $root) {
- foreach ($root->selectTokensOfType('T_COMMENT') as $comment) {
- $value = $comment->getValue();
- if ($value[0] !== '#') {
- continue;
- }
- $this->raiseLintAtOffset(
- $comment->getOffset(),
- self::LINT_COMMENT_STYLE,
- 'Use "//" single-line comments, not "#".',
- '#',
- (preg_match('/^#\S/', $value) ? '// ' : '//'));
- }
+ return $rules;
}
- /**
- * Find cases where loops get nested inside each other but use the same
- * iterator variable. For example:
- *
- * COUNTEREXAMPLE
- * foreach ($list as $thing) {
- * foreach ($stuff as $thing) { // <-- Raises an error for reuse of $thing
- * // ...
- * }
- * }
- *
- */
- private function lintReusedIterators(XHPASTNode $root) {
- $used_vars = array();
-
- $for_loops = $root->selectDescendantsOfType('n_FOR');
- foreach ($for_loops as $for_loop) {
- $var_map = array();
-
- // Find all the variables that are assigned to in the for() expression.
- $for_expr = $for_loop->getChildOfType(0, 'n_FOR_EXPRESSION');
- $bin_exprs = $for_expr->selectDescendantsOfType('n_BINARY_EXPRESSION');
- foreach ($bin_exprs as $bin_expr) {
- if ($bin_expr->getChildByIndex(1)->getConcreteString() === '=') {
- $var = $bin_expr->getChildByIndex(0);
- $var_map[$var->getConcreteString()] = $var;
- }
- }
-
- $used_vars[$for_loop->getID()] = $var_map;
- }
-
- $foreach_loops = $root->selectDescendantsOfType('n_FOREACH');
- foreach ($foreach_loops as $foreach_loop) {
- $var_map = array();
-
- $foreach_expr = $foreach_loop->getChildOftype(0, 'n_FOREACH_EXPRESSION');
-
- // We might use one or two vars, i.e. "foreach ($x as $y => $z)" or
- // "foreach ($x as $y)".
- $possible_used_vars = array(
- $foreach_expr->getChildByIndex(1),
- $foreach_expr->getChildByIndex(2),
- );
- foreach ($possible_used_vars as $var) {
- if ($var->getTypeName() === 'n_EMPTY') {
- continue;
- }
- $name = $var->getConcreteString();
- $name = trim($name, '&'); // Get rid of ref silliness.
- $var_map[$name] = $var;
+ protected function resolveFuture($path, Future $future) {
+ $tree = $this->getXHPASTTreeForPath($path);
+ if (!$tree) {
+ $ex = $this->getXHPASTExceptionForPath($path);
+ if ($ex instanceof XHPASTSyntaxErrorException) {
+ $this->raiseLintAtLine(
+ $ex->getErrorLine(),
+ 1,
+ ArcanistSyntaxErrorXHPASTLinterRule::ID,
+ pht(
+ 'This file contains a syntax error: %s',
+ $ex->getMessage()));
+ } else if ($ex instanceof Exception) {
+ $this->raiseLintAtPath(
+ ArcanistUnableToParseXHPASTLinterRule::ID,
+ $ex->getMessage());
}
-
- $used_vars[$foreach_loop->getID()] = $var_map;
+ return;
}
- $all_loops = $for_loops->add($foreach_loops);
- foreach ($all_loops as $loop) {
- $child_for_loops = $loop->selectDescendantsOfType('n_FOR');
- $child_foreach_loops = $loop->selectDescendantsOfType('n_FOREACH');
- $child_loops = $child_for_loops->add($child_foreach_loops);
-
- $outer_vars = $used_vars[$loop->getID()];
- foreach ($child_loops as $inner_loop) {
- $inner_vars = $used_vars[$inner_loop->getID()];
- $shared = array_intersect_key($outer_vars, $inner_vars);
- if ($shared) {
- $shared_desc = implode(', ', array_keys($shared));
- $message = $this->raiseLintAtNode(
- $inner_loop->getChildByIndex(0),
- self::LINT_REUSED_ITERATORS,
- "This loop reuses iterator variables ({$shared_desc}) from an ".
- "outer loop. You might be clobbering the outer iterator. Change ".
- "the inner loop to use a different iterator name.");
+ $root = $tree->getRootNode();
+ $rules = $this->getLinterRules();
- $locations = array();
- foreach ($shared as $var) {
- $locations[] = $this->getOtherLocation($var->getOffset());
- }
- $message->setOtherLocations($locations);
- }
+ foreach ($rules as $rule) {
+ if ($this->isCodeEnabled($rule->getLintID())) {
+ $rule->setLinter($this);
+ $rule->process($root);
}
}
}
- /**
- * Find cases where a foreach loop is being iterated using a variable
- * reference and the same variable is used outside of the loop without
- * calling unset() or reassigning the variable to another variable
- * reference.
- *
- * COUNTEREXAMPLE
- * foreach ($ar as &$a) {
- * // ...
- * }
- * $a = 1; // <-- Raises an error for using $a
- *
- */
- protected function lintReusedIteratorReferences(XHPASTNode $root) {
-
- $fdefs = $root->selectDescendantsOfType('n_FUNCTION_DECLARATION');
- $mdefs = $root->selectDescendantsOfType('n_METHOD_DECLARATION');
- $defs = $fdefs->add($mdefs);
-
- foreach ($defs as $def) {
-
- $body = $def->getChildByIndex(5);
- if ($body->getTypeName() === 'n_EMPTY') {
- // Abstract method declaration.
- continue;
- }
-
- $exclude = array();
-
- // Exclude uses of variables, unsets, and foreach loops
- // within closures - they are checked on their own
- $func_defs = $body->selectDescendantsOfType('n_FUNCTION_DECLARATION');
- foreach ($func_defs as $func_def) {
- $vars = $func_def->selectDescendantsOfType('n_VARIABLE');
- foreach ($vars as $var) {
- $exclude[$var->getID()] = true;
- }
-
- $unset_lists = $func_def->selectDescendantsOfType('n_UNSET_LIST');
- foreach ($unset_lists as $unset_list) {
- $exclude[$unset_list->getID()] = true;
- }
-
- $foreaches = $func_def->selectDescendantsOfType('n_FOREACH');
- foreach ($foreaches as $foreach) {
- $exclude[$foreach->getID()] = true;
- }
- }
-
- // Find all variables that are unset within the scope
- $unset_vars = array();
- $unset_lists = $body->selectDescendantsOfType('n_UNSET_LIST');
- foreach ($unset_lists as $unset_list) {
- if (isset($exclude[$unset_list->getID()])) {
- continue;
- }
-
- $unset_list_vars = $unset_list->selectDescendantsOfType('n_VARIABLE');
- foreach ($unset_list_vars as $var) {
- $concrete = $this->getConcreteVariableString($var);
- $unset_vars[$concrete][] = $var->getOffset();
- $exclude[$var->getID()] = true;
- }
- }
-
- // Find all reference variables in foreach expressions
- $reference_vars = array();
- $foreaches = $body->selectDescendantsOfType('n_FOREACH');
- foreach ($foreaches as $foreach) {
- if (isset($exclude[$foreach->getID()])) {
- continue;
- }
-
- $foreach_expr = $foreach->getChildOfType(0, 'n_FOREACH_EXPRESSION');
- $var = $foreach_expr->getChildByIndex(2);
- if ($var->getTypeName() !== 'n_VARIABLE_REFERENCE') {
- continue;
- }
-
- $reference = $var->getChildByIndex(0);
- if ($reference->getTypeName() !== 'n_VARIABLE') {
- continue;
- }
-
- $reference_name = $this->getConcreteVariableString($reference);
- $reference_vars[$reference_name][] = $reference->getOffset();
- $exclude[$reference->getID()] = true;
-
- // Exclude uses of the reference variable within the foreach loop
- $foreach_vars = $foreach->selectDescendantsOfType('n_VARIABLE');
- foreach ($foreach_vars as $var) {
- $name = $this->getConcreteVariableString($var);
- if ($name === $reference_name) {
- $exclude[$var->getID()] = true;
- }
- }
- }
-
- // Allow usage if the reference variable is assigned to another
- // reference variable
- $binary = $body->selectDescendantsOfType('n_BINARY_EXPRESSION');
- foreach ($binary as $expr) {
- if ($expr->getChildByIndex(1)->getConcreteString() !== '=') {
- continue;
- }
- $lval = $expr->getChildByIndex(0);
- if ($lval->getTypeName() !== 'n_VARIABLE') {
- continue;
- }
- $rval = $expr->getChildByIndex(2);
- if ($rval->getTypeName() !== 'n_VARIABLE_REFERENCE') {
- continue;
- }
-
- // Counts as unsetting a variable
- $concrete = $this->getConcreteVariableString($lval);
- $unset_vars[$concrete][] = $lval->getOffset();
- $exclude[$lval->getID()] = true;
- }
-
- $all_vars = array();
- $all = $body->selectDescendantsOfType('n_VARIABLE');
- foreach ($all as $var) {
- if (isset($exclude[$var->getID()])) {
- continue;
- }
-
- $name = $this->getConcreteVariableString($var);
-
- if (!isset($reference_vars[$name])) {
- continue;
- }
-
- // Find the closest reference offset to this variable
- $reference_offset = null;
- foreach ($reference_vars[$name] as $offset) {
- if ($offset < $var->getOffset()) {
- $reference_offset = $offset;
- } else {
- break;
- }
- }
- if (!$reference_offset) {
- continue;
- }
-
- // Check if an unset exists between reference and usage of this
- // variable
- $warn = true;
- if (isset($unset_vars[$name])) {
- foreach ($unset_vars[$name] as $unset_offset) {
- if ($unset_offset > $reference_offset &&
- $unset_offset < $var->getOffset()) {
- $warn = false;
- break;
- }
- }
- }
- if ($warn) {
- $this->raiseLintAtNode(
- $var,
- self::LINT_REUSED_ITERATOR_REFERENCE,
- 'This variable was used already as a by-reference iterator '.
- 'variable. Such variables survive outside the foreach loop, '.
- 'do not reuse.');
- }
- }
-
- }
- }
-
- protected function lintVariableVariables(XHPASTNode $root) {
- $vvars = $root->selectDescendantsOfType('n_VARIABLE_VARIABLE');
- foreach ($vvars as $vvar) {
- $this->raiseLintAtNode(
- $vvar,
- self::LINT_VARIABLE_VARIABLE,
- 'Rewrite this code to use an array. Variable variables are unclear '.
- 'and hinder static analysis.');
- }
- }
-
- private function lintUndeclaredVariables(XHPASTNode $root) {
- // These things declare variables in a function:
- // Explicit parameters
- // Assignment
- // Assignment via list()
- // Static
- // Global
- // Lexical vars
- // Builtins ($this)
- // foreach()
- // catch
- //
- // These things make lexical scope unknowable:
- // Use of extract()
- // Assignment to variable variables ($$x)
- // Global with variable variables
- //
- // These things don't count as "using" a variable:
- // isset()
- // empty()
- // Static class variables
- //
- // The general approach here is to find each function/method declaration,
- // then:
- //
- // 1. Identify all the variable declarations, and where they first occur
- // in the function/method declaration.
- // 2. Identify all the uses that don't really count (as above).
- // 3. Everything else must be a use of a variable.
- // 4. For each variable, check if any uses occur before the declaration
- // and warn about them.
- //
- // We also keep track of where lexical scope becomes unknowable (e.g.,
- // because the function calls extract() or uses dynamic variables,
- // preventing us from keeping track of which variables are defined) so we
- // can stop issuing warnings after that.
- //
- // TODO: Support functions defined inside other functions which is commonly
- // used with anonymous functions.
-
- $fdefs = $root->selectDescendantsOfType('n_FUNCTION_DECLARATION');
- $mdefs = $root->selectDescendantsOfType('n_METHOD_DECLARATION');
- $defs = $fdefs->add($mdefs);
-
- foreach ($defs as $def) {
-
- // We keep track of the first offset where scope becomes unknowable, and
- // silence any warnings after that. Default it to INT_MAX so we can min()
- // it later to keep track of the first problem we encounter.
- $scope_destroyed_at = PHP_INT_MAX;
-
- $declarations = array(
- '$this' => 0,
- ) + array_fill_keys($this->getSuperGlobalNames(), 0);
- $declaration_tokens = array();
- $exclude_tokens = array();
- $vars = array();
-
- // First up, find all the different kinds of declarations, as explained
- // above. Put the tokens into the $vars array.
-
- $param_list = $def->getChildOfType(3, 'n_DECLARATION_PARAMETER_LIST');
- $param_vars = $param_list->selectDescendantsOfType('n_VARIABLE');
- foreach ($param_vars as $var) {
- $vars[] = $var;
- }
-
- // This is PHP5.3 closure syntax: function () use ($x) {};
- $lexical_vars = $def
- ->getChildByIndex(4)
- ->selectDescendantsOfType('n_VARIABLE');
- foreach ($lexical_vars as $var) {
- $vars[] = $var;
- }
-
- $body = $def->getChildByIndex(5);
- if ($body->getTypeName() === 'n_EMPTY') {
- // Abstract method declaration.
- continue;
- }
-
- $static_vars = $body
- ->selectDescendantsOfType('n_STATIC_DECLARATION')
- ->selectDescendantsOfType('n_VARIABLE');
- foreach ($static_vars as $var) {
- $vars[] = $var;
- }
-
-
- $global_vars = $body
- ->selectDescendantsOfType('n_GLOBAL_DECLARATION_LIST');
- foreach ($global_vars as $var_list) {
- foreach ($var_list->getChildren() as $var) {
- if ($var->getTypeName() === 'n_VARIABLE') {
- $vars[] = $var;
- } else {
- // Dynamic global variable, i.e. "global $$x;".
- $scope_destroyed_at = min($scope_destroyed_at, $var->getOffset());
- // An error is raised elsewhere, no need to raise here.
- }
- }
- }
-
- // Include "catch (Exception $ex)", but not variables in the body of the
- // catch block.
- $catches = $body->selectDescendantsOfType('n_CATCH');
- foreach ($catches as $catch) {
- $vars[] = $catch->getChildOfType(1, 'n_VARIABLE');
- }
-
- $binary = $body->selectDescendantsOfType('n_BINARY_EXPRESSION');
- foreach ($binary as $expr) {
- if ($expr->getChildByIndex(1)->getConcreteString() !== '=') {
- continue;
- }
- $lval = $expr->getChildByIndex(0);
- if ($lval->getTypeName() === 'n_VARIABLE') {
- $vars[] = $lval;
- } else if ($lval->getTypeName() === 'n_LIST') {
- // Recursivey grab everything out of list(), since the grammar
- // permits list() to be nested. Also note that list() is ONLY valid
- // as an lval assignments, so we could safely lift this out of the
- // n_BINARY_EXPRESSION branch.
- $assign_vars = $lval->selectDescendantsOfType('n_VARIABLE');
- foreach ($assign_vars as $var) {
- $vars[] = $var;
- }
- }
-
- if ($lval->getTypeName() === 'n_VARIABLE_VARIABLE') {
- $scope_destroyed_at = min($scope_destroyed_at, $lval->getOffset());
- // No need to raise here since we raise an error elsewhere.
- }
- }
-
- $calls = $body->selectDescendantsOfType('n_FUNCTION_CALL');
- foreach ($calls as $call) {
- $name = strtolower($call->getChildByIndex(0)->getConcreteString());
-
- if ($name === 'empty' || $name === 'isset') {
- $params = $call
- ->getChildOfType(1, 'n_CALL_PARAMETER_LIST')
- ->selectDescendantsOfType('n_VARIABLE');
- foreach ($params as $var) {
- $exclude_tokens[$var->getID()] = true;
- }
- continue;
- }
- if ($name !== 'extract') {
- continue;
- }
- $scope_destroyed_at = min($scope_destroyed_at, $call->getOffset());
- $this->raiseLintAtNode(
- $call,
- self::LINT_EXTRACT_USE,
- 'Avoid extract(). It is confusing and hinders static analysis.');
- }
-
- // Now we have every declaration except foreach(), handled below. Build
- // two maps, one which just keeps track of which tokens are part of
- // declarations ($declaration_tokens) and one which has the first offset
- // where a variable is declared ($declarations).
-
- foreach ($vars as $var) {
- $concrete = $this->getConcreteVariableString($var);
- $declarations[$concrete] = min(
- idx($declarations, $concrete, PHP_INT_MAX),
- $var->getOffset());
- $declaration_tokens[$var->getID()] = true;
- }
-
- // Excluded tokens are ones we don't "count" as being used, described
- // above. Put them into $exclude_tokens.
-
- $class_statics = $body
- ->selectDescendantsOfType('n_CLASS_STATIC_ACCESS');
- $class_static_vars = $class_statics
- ->selectDescendantsOfType('n_VARIABLE');
- foreach ($class_static_vars as $var) {
- $exclude_tokens[$var->getID()] = true;
- }
-
-
- // Find all the variables in scope, and figure out where they are used.
- // We want to find foreach() iterators which are both declared before and
- // used after the foreach() loop.
-
- $uses = array();
-
- $all_vars = $body->selectDescendantsOfType('n_VARIABLE');
- $all = array();
-
- // NOTE: $all_vars is not a real array so we can't unset() it.
- foreach ($all_vars as $var) {
-
- // Be strict since it's easier; we don't let you reuse an iterator you
- // declared before a loop after the loop, even if you're just assigning
- // to it.
-
- $concrete = $this->getConcreteVariableString($var);
- $uses[$concrete][$var->getID()] = $var->getOffset();
-
- if (isset($declaration_tokens[$var->getID()])) {
- // We know this is part of a declaration, so it's fine.
- continue;
- }
- if (isset($exclude_tokens[$var->getID()])) {
- // We know this is part of isset() or similar, so it's fine.
- continue;
- }
-
- $all[$var->getOffset()] = $concrete;
- }
-
-
- // Do foreach() last, we want to handle implicit redeclaration of a
- // variable already in scope since this probably means we're ovewriting a
- // local.
-
- // NOTE: Processing foreach expressions in order allows programs which
- // reuse iterator variables in other foreach() loops -- this is fine. We
- // have a separate warning to prevent nested loops from reusing the same
- // iterators.
-
- $foreaches = $body->selectDescendantsOfType('n_FOREACH');
- $all_foreach_vars = array();
- foreach ($foreaches as $foreach) {
- $foreach_expr = $foreach->getChildOfType(0, 'n_FOREACH_EXPRESSION');
-
- $foreach_vars = array();
-
- // Determine the end of the foreach() loop.
- $foreach_tokens = $foreach->getTokens();
- $last_token = end($foreach_tokens);
- $foreach_end = $last_token->getOffset();
-
- $key_var = $foreach_expr->getChildByIndex(1);
- if ($key_var->getTypeName() === 'n_VARIABLE') {
- $foreach_vars[] = $key_var;
- }
-
- $value_var = $foreach_expr->getChildByIndex(2);
- if ($value_var->getTypeName() === 'n_VARIABLE') {
- $foreach_vars[] = $value_var;
- } else {
- // The root-level token may be a reference, as in:
- // foreach ($a as $b => &$c) { ... }
- // Reach into the n_VARIABLE_REFERENCE node to grab the n_VARIABLE
- // node.
- $var = $value_var->getChildByIndex(0);
- if ($var->getTypeName() === 'n_VARIABLE_VARIABLE') {
- $var = $var->getChildByIndex(0);
- }
- $foreach_vars[] = $var;
- }
-
- // Remove all uses of the iterators inside of the foreach() loop from
- // the $uses map.
-
- foreach ($foreach_vars as $var) {
- $concrete = $this->getConcreteVariableString($var);
- $offset = $var->getOffset();
-
- foreach ($uses[$concrete] as $id => $use_offset) {
- if (($use_offset >= $offset) && ($use_offset < $foreach_end)) {
- unset($uses[$concrete][$id]);
- }
- }
-
- $all_foreach_vars[] = $var;
- }
- }
-
- foreach ($all_foreach_vars as $var) {
- $concrete = $this->getConcreteVariableString($var);
- $offset = $var->getOffset();
-
- // If a variable was declared before a foreach() and is used after
- // it, raise a message.
-
- if (isset($declarations[$concrete])) {
- if ($declarations[$concrete] < $offset) {
- if (!empty($uses[$concrete]) &&
- max($uses[$concrete]) > $offset) {
- $message = $this->raiseLintAtNode(
- $var,
- self::LINT_REUSED_AS_ITERATOR,
- 'This iterator variable is a previously declared local '.
- 'variable. To avoid overwriting locals, do not reuse them '.
- 'as iterator variables.');
- $message->setOtherLocations(array(
- $this->getOtherLocation($declarations[$concrete]),
- $this->getOtherLocation(max($uses[$concrete])),
- ));
- }
- }
- }
-
- // This is a declaration, exclude it from the "declare variables prior
- // to use" check below.
- unset($all[$var->getOffset()]);
-
- $vars[] = $var;
- }
-
- // Now rebuild declarations to include foreach().
-
- foreach ($vars as $var) {
- $concrete = $this->getConcreteVariableString($var);
- $declarations[$concrete] = min(
- idx($declarations, $concrete, PHP_INT_MAX),
- $var->getOffset());
- $declaration_tokens[$var->getID()] = true;
- }
-
- foreach (array('n_STRING_SCALAR', 'n_HEREDOC') as $type) {
- foreach ($body->selectDescendantsOfType($type) as $string) {
- foreach ($string->getStringVariables() as $offset => $var) {
- $all[$string->getOffset() + $offset - 1] = '$'.$var;
- }
- }
- }
-
- // Issue a warning for every variable token, unless it appears in a
- // declaration, we know about a prior declaration, we have explicitly
- // exlcuded it, or scope has been made unknowable before it appears.
-
- $issued_warnings = array();
- foreach ($all as $offset => $concrete) {
- if ($offset >= $scope_destroyed_at) {
- // This appears after an extract() or $$var so we have no idea
- // whether it's legitimate or not. We raised a harshly-worded warning
- // when scope was made unknowable, so just ignore anything we can't
- // figure out.
- continue;
- }
- if ($offset >= idx($declarations, $concrete, PHP_INT_MAX)) {
- // The use appears after the variable is declared, so it's fine.
- continue;
- }
- if (!empty($issued_warnings[$concrete])) {
- // We've already issued a warning for this variable so we don't need
- // to issue another one.
- continue;
- }
- $this->raiseLintAtOffset(
- $offset,
- self::LINT_UNDECLARED_VARIABLE,
- 'Declare variables prior to use (even if you are passing them '.
- 'as reference parameters). You may have misspelled this '.
- 'variable name.',
- $concrete);
- $issued_warnings[$concrete] = true;
- }
- }
- }
-
- private function getConcreteVariableString(XHPASTNode $var) {
- $concrete = $var->getConcreteString();
- // Strip off curly braces as in $obj->{$property}.
- $concrete = trim($concrete, '{}');
- return $concrete;
- }
-
- private function lintPHPTagUse(XHPASTNode $root) {
- $tokens = $root->getTokens();
- foreach ($tokens as $token) {
- if ($token->getTypeName() === 'T_OPEN_TAG') {
- if (trim($token->getValue()) === '<?') {
- $this->raiseLintAtToken(
- $token,
- self::LINT_PHP_SHORT_TAG,
- 'Use the full form of the PHP open tag, "<?php".',
- "<?php\n");
- }
- break;
- } else if ($token->getTypeName() === 'T_OPEN_TAG_WITH_ECHO') {
- $this->raiseLintAtToken(
- $token,
- self::LINT_PHP_ECHO_TAG,
- 'Avoid the PHP echo short form, "<?=".');
- break;
- } else {
- if (!preg_match('/^#!/', $token->getValue())) {
- $this->raiseLintAtToken(
- $token,
- self::LINT_PHP_OPEN_TAG,
- 'PHP files should start with "<?php", which may be preceded by '.
- 'a "#!" line for scripts.');
- }
- break;
- }
- }
-
- foreach ($root->selectTokensOfType('T_CLOSE_TAG') as $token) {
- $this->raiseLintAtToken(
- $token,
- self::LINT_PHP_CLOSE_TAG,
- 'Do not use the PHP closing tag, "?>".');
- }
- }
-
- private function lintNamingConventions(XHPASTNode $root) {
- // We're going to build up a list of <type, name, token, error> tuples
- // and then try to instantiate a hook class which has the opportunity to
- // override us.
- $names = array();
-
- $classes = $root->selectDescendantsOfType('n_CLASS_DECLARATION');
- foreach ($classes as $class) {
- $name_token = $class->getChildByIndex(1);
- $name_string = $name_token->getConcreteString();
-
- $names[] = array(
- 'class',
- $name_string,
- $name_token,
- ArcanistXHPASTLintNamingHook::isUpperCamelCase($name_string)
- ? null
- : 'Follow naming conventions: classes should be named using '.
- 'UpperCamelCase.',
- );
- }
-
- $ifaces = $root->selectDescendantsOfType('n_INTERFACE_DECLARATION');
- foreach ($ifaces as $iface) {
- $name_token = $iface->getChildByIndex(1);
- $name_string = $name_token->getConcreteString();
- $names[] = array(
- 'interface',
- $name_string,
- $name_token,
- ArcanistXHPASTLintNamingHook::isUpperCamelCase($name_string)
- ? null
- : 'Follow naming conventions: interfaces should be named using '.
- 'UpperCamelCase.',
- );
- }
-
-
- $functions = $root->selectDescendantsOfType('n_FUNCTION_DECLARATION');
- foreach ($functions as $function) {
- $name_token = $function->getChildByIndex(2);
- if ($name_token->getTypeName() === 'n_EMPTY') {
- // Unnamed closure.
- continue;
- }
- $name_string = $name_token->getConcreteString();
- $names[] = array(
- 'function',
- $name_string,
- $name_token,
- ArcanistXHPASTLintNamingHook::isLowercaseWithUnderscores(
- ArcanistXHPASTLintNamingHook::stripPHPFunction($name_string))
- ? null
- : 'Follow naming conventions: functions should be named using '.
- 'lowercase_with_underscores.',
- );
- }
-
-
- $methods = $root->selectDescendantsOfType('n_METHOD_DECLARATION');
- foreach ($methods as $method) {
- $name_token = $method->getChildByIndex(2);
- $name_string = $name_token->getConcreteString();
- $names[] = array(
- 'method',
- $name_string,
- $name_token,
- ArcanistXHPASTLintNamingHook::isLowerCamelCase(
- ArcanistXHPASTLintNamingHook::stripPHPFunction($name_string))
- ? null
- : 'Follow naming conventions: methods should be named using '.
- 'lowerCamelCase.',
- );
- }
-
- $param_tokens = array();
-
- $params = $root->selectDescendantsOfType('n_DECLARATION_PARAMETER_LIST');
- foreach ($params as $param_list) {
- foreach ($param_list->getChildren() as $param) {
- $name_token = $param->getChildByIndex(1);
- if ($name_token->getTypeName() === 'n_VARIABLE_REFERENCE') {
- $name_token = $name_token->getChildOfType(0, 'n_VARIABLE');
- }
- $param_tokens[$name_token->getID()] = true;
- $name_string = $name_token->getConcreteString();
-
- $names[] = array(
- 'parameter',
- $name_string,
- $name_token,
- ArcanistXHPASTLintNamingHook::isLowercaseWithUnderscores(
- ArcanistXHPASTLintNamingHook::stripPHPVariable($name_string))
- ? null
- : 'Follow naming conventions: parameters should be named using '.
- 'lowercase_with_underscores.',
- );
- }
- }
-
-
- $constants = $root->selectDescendantsOfType(
- 'n_CLASS_CONSTANT_DECLARATION_LIST');
- foreach ($constants as $constant_list) {
- foreach ($constant_list->getChildren() as $constant) {
- $name_token = $constant->getChildByIndex(0);
- $name_string = $name_token->getConcreteString();
- $names[] = array(
- 'constant',
- $name_string,
- $name_token,
- ArcanistXHPASTLintNamingHook::isUppercaseWithUnderscores($name_string)
- ? null
- : 'Follow naming conventions: class constants should be named '.
- 'using UPPERCASE_WITH_UNDERSCORES.',
- );
- }
- }
-
- $member_tokens = array();
-
- $props = $root->selectDescendantsOfType('n_CLASS_MEMBER_DECLARATION_LIST');
- foreach ($props as $prop_list) {
- foreach ($prop_list->getChildren() as $token_id => $prop) {
- if ($prop->getTypeName() === 'n_CLASS_MEMBER_MODIFIER_LIST') {
- continue;
- }
-
- $name_token = $prop->getChildByIndex(0);
- $member_tokens[$name_token->getID()] = true;
-
- $name_string = $name_token->getConcreteString();
- $names[] = array(
- 'member',
- $name_string,
- $name_token,
- ArcanistXHPASTLintNamingHook::isLowerCamelCase(
- ArcanistXHPASTLintNamingHook::stripPHPVariable($name_string))
- ? null
- : 'Follow naming conventions: class properties should be named '.
- 'using lowerCamelCase.',
- );
- }
- }
-
- $superglobal_map = array_fill_keys(
- $this->getSuperGlobalNames(),
- true);
-
-
- $fdefs = $root->selectDescendantsOfType('n_FUNCTION_DECLARATION');
- $mdefs = $root->selectDescendantsOfType('n_METHOD_DECLARATION');
- $defs = $fdefs->add($mdefs);
-
- foreach ($defs as $def) {
- $globals = $def->selectDescendantsOfType('n_GLOBAL_DECLARATION_LIST');
- $globals = $globals->selectDescendantsOfType('n_VARIABLE');
-
- $globals_map = array();
- foreach ($globals as $global) {
- $global_string = $global->getConcreteString();
- $globals_map[$global_string] = true;
- $names[] = array(
- 'user',
- $global_string,
- $global,
-
- // No advice for globals, but hooks have an option to provide some.
- null,
- );
- }
-
- // Exclude access of static properties, since lint will be raised at
- // their declaration if they're invalid and they may not conform to
- // variable rules. This is slightly overbroad (includes the entire
- // rhs of a "Class::..." token) to cover cases like "Class:$x[0]". These
- // variables are simply made exempt from naming conventions.
- $exclude_tokens = array();
- $statics = $def->selectDescendantsOfType('n_CLASS_STATIC_ACCESS');
- foreach ($statics as $static) {
- $rhs = $static->getChildByIndex(1);
- if ($rhs->getTypeName() == 'n_VARIABLE') {
- $exclude_tokens[$rhs->getID()] = true;
- } else {
- $rhs_vars = $rhs->selectDescendantsOfType('n_VARIABLE');
- foreach ($rhs_vars as $var) {
- $exclude_tokens[$var->getID()] = true;
- }
- }
- }
-
- $vars = $def->selectDescendantsOfType('n_VARIABLE');
- foreach ($vars as $token_id => $var) {
- if (isset($member_tokens[$token_id])) {
- continue;
- }
- if (isset($param_tokens[$token_id])) {
- continue;
- }
- if (isset($exclude_tokens[$token_id])) {
- continue;
- }
-
- $var_string = $var->getConcreteString();
-
- // Awkward artifact of "$o->{$x}".
- $var_string = trim($var_string, '{}');
-
- if (isset($superglobal_map[$var_string])) {
- continue;
- }
- if (isset($globals_map[$var_string])) {
- continue;
- }
-
- $names[] = array(
- 'variable',
- $var_string,
- $var,
- ArcanistXHPASTLintNamingHook::isLowercaseWithUnderscores(
- ArcanistXHPASTLintNamingHook::stripPHPVariable($var_string))
- ? null
- : 'Follow naming conventions: variables should be named using '.
- 'lowercase_with_underscores.',
- );
- }
- }
-
- $engine = $this->getEngine();
- $working_copy = $engine->getWorkingCopy();
-
- if ($working_copy) {
- // If a naming hook is configured, give it a chance to override the
- // default results for all the symbol names.
- $hook_class = $this->naminghook
- ? $this->naminghook
- : $working_copy->getProjectConfig('lint.xhpast.naminghook');
- if ($hook_class) {
- $hook_obj = newv($hook_class, array());
- foreach ($names as $k => $name_attrs) {
- list($type, $name, $token, $default) = $name_attrs;
- $result = $hook_obj->lintSymbolName($type, $name, $default);
- $names[$k][3] = $result;
- }
- }
- }
-
- // Raise anything we're left with.
- foreach ($names as $k => $name_attrs) {
- list($type, $name, $token, $result) = $name_attrs;
- if ($result) {
- $this->raiseLintAtNode(
- $token,
- self::LINT_NAMING_CONVENTIONS,
- $result);
- }
- }
- }
-
- private function lintSurpriseConstructors(XHPASTNode $root) {
- $classes = $root->selectDescendantsOfType('n_CLASS_DECLARATION');
- foreach ($classes as $class) {
- $class_name = $class->getChildByIndex(1)->getConcreteString();
- $methods = $class->selectDescendantsOfType('n_METHOD_DECLARATION');
- foreach ($methods as $method) {
- $method_name_token = $method->getChildByIndex(2);
- $method_name = $method_name_token->getConcreteString();
- if (strtolower($class_name) === strtolower($method_name)) {
- $this->raiseLintAtNode(
- $method_name_token,
- self::LINT_IMPLICIT_CONSTRUCTOR,
- 'Name constructors __construct() explicitly. This method is a '.
- 'constructor because it has the same name as the class it is '.
- 'defined in.');
- }
- }
- }
- }
-
- private function lintParenthesesShouldHugExpressions(XHPASTNode $root) {
- $calls = $root->selectDescendantsOfType('n_CALL_PARAMETER_LIST');
- $controls = $root->selectDescendantsOfType('n_CONTROL_CONDITION');
- $fors = $root->selectDescendantsOfType('n_FOR_EXPRESSION');
- $foreach = $root->selectDescendantsOfType('n_FOREACH_EXPRESSION');
- $decl = $root->selectDescendantsOfType('n_DECLARATION_PARAMETER_LIST');
-
- $all_paren_groups = $calls
- ->add($controls)
- ->add($fors)
- ->add($foreach)
- ->add($decl);
- foreach ($all_paren_groups as $group) {
- $tokens = $group->getTokens();
-
- $token_o = array_shift($tokens);
- $token_c = array_pop($tokens);
- if ($token_o->getTypeName() !== '(') {
- throw new Exception('Expected open paren!');
- }
- if ($token_c->getTypeName() !== ')') {
- throw new Exception('Expected close paren!');
- }
-
- $nonsem_o = $token_o->getNonsemanticTokensAfter();
- $nonsem_c = $token_c->getNonsemanticTokensBefore();
-
- if (!$nonsem_o) {
- continue;
- }
-
- $raise = array();
-
- $string_o = implode('', mpull($nonsem_o, 'getValue'));
- if (preg_match('/^[ ]+$/', $string_o)) {
- $raise[] = array($nonsem_o, $string_o);
- }
-
- if ($nonsem_o !== $nonsem_c) {
- $string_c = implode('', mpull($nonsem_c, 'getValue'));
- if (preg_match('/^[ ]+$/', $string_c)) {
- $raise[] = array($nonsem_c, $string_c);
- }
- }
-
- foreach ($raise as $warning) {
- list($tokens, $string) = $warning;
- $this->raiseLintAtOffset(
- reset($tokens)->getOffset(),
- self::LINT_PARENTHESES_SPACING,
- 'Parentheses should hug their contents.',
- $string,
- '');
- }
- }
- }
-
- private function lintSpaceAfterControlStatementKeywords(XHPASTNode $root) {
- foreach ($root->getTokens() as $id => $token) {
- switch ($token->getTypeName()) {
- case 'T_IF':
- case 'T_ELSE':
- case 'T_FOR':
- case 'T_FOREACH':
- case 'T_WHILE':
- case 'T_DO':
- case 'T_SWITCH':
- $after = $token->getNonsemanticTokensAfter();
- if (empty($after)) {
- $this->raiseLintAtToken(
- $token,
- self::LINT_CONTROL_STATEMENT_SPACING,
- 'Convention: put a space after control statements.',
- $token->getValue().' ');
- } else if (count($after) === 1) {
- $space = head($after);
-
- // If we have an else clause with braces, $space may not be
- // a single white space. e.g.,
- //
- // if ($x)
- // echo 'foo'
- // else // <- $space is not " " but "\n ".
- // echo 'bar'
- //
- // We just require it starts with either a whitespace or a newline.
- if ($token->getTypeName() === 'T_ELSE' ||
- $token->getTypeName() === 'T_DO') {
- break;
- }
-
- if ($space->isAnyWhitespace() && $space->getValue() !== ' ') {
- $this->raiseLintAtToken(
- $space,
- self::LINT_CONTROL_STATEMENT_SPACING,
- 'Convention: put a single space after control statements.',
- ' ');
- }
- }
- break;
- }
- }
- }
-
- private function lintSpaceAroundBinaryOperators(XHPASTNode $root) {
- $expressions = $root->selectDescendantsOfType('n_BINARY_EXPRESSION');
- foreach ($expressions as $expression) {
- $operator = $expression->getChildByIndex(1);
- $operator_value = $operator->getConcreteString();
- list($before, $after) = $operator->getSurroundingNonsemanticTokens();
-
- $replace = null;
- if (empty($before) && empty($after)) {
- $replace = " {$operator_value} ";
- } else if (empty($before)) {
- $replace = " {$operator_value}";
- } else if (empty($after)) {
- $replace = "{$operator_value} ";
- }
-
- if ($replace !== null) {
- $this->raiseLintAtNode(
- $operator,
- self::LINT_BINARY_EXPRESSION_SPACING,
- 'Convention: logical and arithmetic operators should be '.
- 'surrounded by whitespace.',
- $replace);
- }
- }
-
- $tokens = $root->selectTokensOfType(',');
- foreach ($tokens as $token) {
- $next = $token->getNextToken();
- switch ($next->getTypeName()) {
- case ')':
- case 'T_WHITESPACE':
- break;
- default:
- $this->raiseLintAtToken(
- $token,
- self::LINT_BINARY_EXPRESSION_SPACING,
- 'Convention: comma should be followed by space.',
- ', ');
- break;
- }
- }
-
- $tokens = $root->selectTokensOfType('T_DOUBLE_ARROW');
- foreach ($tokens as $token) {
- $prev = $token->getPrevToken();
- $next = $token->getNextToken();
-
- $prev_type = $prev->getTypeName();
- $next_type = $next->getTypeName();
-
- $prev_space = ($prev_type === 'T_WHITESPACE');
- $next_space = ($next_type === 'T_WHITESPACE');
-
- $replace = null;
- if (!$prev_space && !$next_space) {
- $replace = ' => ';
- } else if ($prev_space && !$next_space) {
- $replace = '=> ';
- } else if (!$prev_space && $next_space) {
- $replace = ' =>';
- }
-
- if ($replace !== null) {
- $this->raiseLintAtToken(
- $token,
- self::LINT_BINARY_EXPRESSION_SPACING,
- 'Convention: double arrow should be surrounded by whitespace.',
- $replace);
- }
- }
-
- $parameters = $root->selectDescendantsOfType('n_DECLARATION_PARAMETER');
- foreach ($parameters as $parameter) {
- if ($parameter->getChildByIndex(2)->getTypeName() == 'n_EMPTY') {
- continue;
- }
-
- $operator = head($parameter->selectTokensOfType('='));
- $before = $operator->getNonsemanticTokensBefore();
- $after = $operator->getNonsemanticTokensAfter();
-
- $replace = null;
- if (empty($before) && empty($after)) {
- $replace = ' = ';
- } else if (empty($before)) {
- $replace = ' =';
- } else if (empty($after)) {
- $replace = '= ';
- }
-
- if ($replace !== null) {
- $this->raiseLintAtToken(
- $operator,
- self::LINT_BINARY_EXPRESSION_SPACING,
- 'Convention: logical and arithmetic operators should be '.
- 'surrounded by whitespace.',
- $replace);
- }
- }
- }
-
- private function lintSpaceAroundConcatenationOperators(XHPASTNode $root) {
- $tokens = $root->selectTokensOfType('.');
- foreach ($tokens as $token) {
- $prev = $token->getPrevToken();
- $next = $token->getNextToken();
-
- foreach (array('prev' => $prev, 'next' => $next) as $wtoken) {
- if ($wtoken->getTypeName() !== 'T_WHITESPACE') {
- continue;
- }
-
- $value = $wtoken->getValue();
- if (strpos($value, "\n") !== false) {
- // If the whitespace has a newline, it's conventional.
- continue;
- }
-
- $next = $wtoken->getNextToken();
- if ($next && $next->getTypeName() === 'T_COMMENT') {
- continue;
- }
-
- $this->raiseLintAtToken(
- $wtoken,
- self::LINT_CONCATENATION_OPERATOR,
- 'Convention: no spaces around "." (string concatenation) operator.',
- '');
- }
- }
- }
-
- private function lintDynamicDefines(XHPASTNode $root) {
- $calls = $root->selectDescendantsOfType('n_FUNCTION_CALL');
- foreach ($calls as $call) {
- $name = $call->getChildByIndex(0)->getConcreteString();
- if (strtolower($name) === 'define') {
- $parameter_list = $call->getChildOfType(1, 'n_CALL_PARAMETER_LIST');
- $defined = $parameter_list->getChildByIndex(0);
- if (!$defined->isStaticScalar()) {
- $this->raiseLintAtNode(
- $defined,
- self::LINT_DYNAMIC_DEFINE,
- 'First argument to define() must be a string literal.');
- }
- }
- }
- }
-
- private function lintUseOfThisInStaticMethods(XHPASTNode $root) {
- $classes = $root->selectDescendantsOfType('n_CLASS_DECLARATION');
- foreach ($classes as $class) {
- $methods = $class->selectDescendantsOfType('n_METHOD_DECLARATION');
- foreach ($methods as $method) {
-
- $attributes = $method
- ->getChildByIndex(0, 'n_METHOD_MODIFIER_LIST')
- ->selectDescendantsOfType('n_STRING');
-
- $method_is_static = false;
- $method_is_abstract = false;
- foreach ($attributes as $attribute) {
- if (strtolower($attribute->getConcreteString()) === 'static') {
- $method_is_static = true;
- }
- if (strtolower($attribute->getConcreteString()) === 'abstract') {
- $method_is_abstract = true;
- }
- }
-
- if ($method_is_abstract) {
- continue;
- }
-
- if (!$method_is_static) {
- continue;
- }
-
- $body = $method->getChildOfType(5, 'n_STATEMENT_LIST');
-
- $variables = $body->selectDescendantsOfType('n_VARIABLE');
- foreach ($variables as $variable) {
- if ($method_is_static &&
- strtolower($variable->getConcreteString()) === '$this') {
- $this->raiseLintAtNode(
- $variable,
- self::LINT_STATIC_THIS,
- 'You can not reference "$this" inside a static method.');
- }
- }
- }
- }
- }
-
- /**
- * preg_quote() takes two arguments, but the second one is optional because
- * it is possible to use (), [] or {} as regular expression delimiters. If
- * you don't pass a second argument, you're probably going to get something
- * wrong.
- */
- private function lintPregQuote(XHPASTNode $root) {
- $function_calls = $root->selectDescendantsOfType('n_FUNCTION_CALL');
- foreach ($function_calls as $call) {
- $name = $call->getChildByIndex(0)->getConcreteString();
- if (strtolower($name) === 'preg_quote') {
- $parameter_list = $call->getChildOfType(1, 'n_CALL_PARAMETER_LIST');
- if (count($parameter_list->getChildren()) !== 2) {
- $this->raiseLintAtNode(
- $call,
- self::LINT_PREG_QUOTE_MISUSE,
- 'If you use pattern delimiters that require escaping (such as //, '.
- 'but not ()) then you should pass two arguments to preg_quote(), '.
- 'so that preg_quote() knows which delimiter to escape.');
- }
- }
- }
- }
-
- /**
- * Exit is parsed as an expression, but using it as such is almost always
- * wrong. That is, this is valid:
- *
- * strtoupper(33 * exit - 6);
- *
- * When exit is used as an expression, it causes the program to terminate with
- * exit code 0. This is likely not what is intended; these statements have
- * different effects:
- *
- * exit(-1);
- * exit -1;
- *
- * The former exits with a failure code, the latter with a success code!
- */
- private function lintExitExpressions(XHPASTNode $root) {
- $unaries = $root->selectDescendantsOfType('n_UNARY_PREFIX_EXPRESSION');
- foreach ($unaries as $unary) {
- $operator = $unary->getChildByIndex(0)->getConcreteString();
- if (strtolower($operator) === 'exit') {
- if ($unary->getParentNode()->getTypeName() !== 'n_STATEMENT') {
- $this->raiseLintAtNode(
- $unary,
- self::LINT_EXIT_EXPRESSION,
- 'Use exit as a statement, not an expression.');
- }
- }
- }
- }
-
- private function lintArrayIndexWhitespace(XHPASTNode $root) {
- $indexes = $root->selectDescendantsOfType('n_INDEX_ACCESS');
- foreach ($indexes as $index) {
- $tokens = $index->getChildByIndex(0)->getTokens();
- $last = array_pop($tokens);
- $trailing = $last->getNonsemanticTokensAfter();
- $trailing_text = implode('', mpull($trailing, 'getValue'));
- if (preg_match('/^ +$/', $trailing_text)) {
- $this->raiseLintAtOffset(
- $last->getOffset() + strlen($last->getValue()),
- self::LINT_ARRAY_INDEX_SPACING,
- 'Convention: no spaces before index access.',
- $trailing_text,
- '');
- }
- }
- }
-
- private function lintTODOComments(XHPASTNode $root) {
- $comments = $root->selectTokensOfType('T_COMMENT') +
- $root->selectTokensOfType('T_DOC_COMMENT');
-
- foreach ($comments as $token) {
- $value = $token->getValue();
- if ($token->getTypeName() === 'T_DOC_COMMENT') {
- $regex = '/(TODO|@todo)/';
- } else {
- $regex = '/TODO/';
- }
-
- $matches = null;
- $preg = preg_match_all(
- $regex,
- $value,
- $matches,
- PREG_OFFSET_CAPTURE);
-
- foreach ($matches[0] as $match) {
- list($string, $offset) = $match;
- $this->raiseLintAtOffset(
- $token->getOffset() + $offset,
- self::LINT_TODO_COMMENT,
- 'This comment has a TODO.',
- $string);
- }
- }
- }
-
- /**
- * Lint that if the file declares exactly one interface or class,
- * the name of the file matches the name of the class,
- * unless the classname is funky like an XHP element.
- */
- private function lintPrimaryDeclarationFilenameMatch(XHPASTNode $root) {
- $classes = $root->selectDescendantsOfType('n_CLASS_DECLARATION');
- $interfaces = $root->selectDescendantsOfType('n_INTERFACE_DECLARATION');
-
- if (count($classes) + count($interfaces) !== 1) {
- return;
- }
-
- $declarations = count($classes) ? $classes : $interfaces;
- $declarations->rewind();
- $declaration = $declarations->current();
-
- $decl_name = $declaration->getChildByIndex(1);
- $decl_string = $decl_name->getConcreteString();
-
- // Exclude strangely named classes, e.g. XHP tags.
- if (!preg_match('/^\w+$/', $decl_string)) {
- return;
- }
-
- $rename = $decl_string.'.php';
-
- $path = $this->getActivePath();
- $filename = basename($path);
-
- if ($rename === $filename) {
- return;
- }
-
- $this->raiseLintAtNode(
- $decl_name,
- self::LINT_CLASS_FILENAME_MISMATCH,
- "The name of this file differs from the name of the class or interface ".
- "it declares. Rename the file to '{$rename}'.");
- }
-
- private function lintPlusOperatorOnStrings(XHPASTNode $root) {
- $binops = $root->selectDescendantsOfType('n_BINARY_EXPRESSION');
- foreach ($binops as $binop) {
- $op = $binop->getChildByIndex(1);
- if ($op->getConcreteString() !== '+') {
- continue;
- }
-
- $left = $binop->getChildByIndex(0);
- $right = $binop->getChildByIndex(2);
- if (($left->getTypeName() === 'n_STRING_SCALAR') ||
- ($right->getTypeName() === 'n_STRING_SCALAR')) {
- $this->raiseLintAtNode(
- $binop,
- self::LINT_PLUS_OPERATOR_ON_STRINGS,
- "In PHP, '.' is the string concatenation operator, not '+'. This ".
- "expression uses '+' with a string literal as an operand.");
- }
- }
- }
-
- /**
- * Finds duplicate keys in array initializers, as in
- * array(1 => 'anything', 1 => 'foo'). Since the first entry is ignored,
- * this is almost certainly an error.
- */
- private function lintDuplicateKeysInArray(XHPASTNode $root) {
- $array_literals = $root->selectDescendantsOfType('n_ARRAY_LITERAL');
- foreach ($array_literals as $array_literal) {
- $nodes_by_key = array();
- $keys_warn = array();
- $list_node = $array_literal->getChildByIndex(0);
- foreach ($list_node->getChildren() as $array_entry) {
- $key_node = $array_entry->getChildByIndex(0);
-
- switch ($key_node->getTypeName()) {
- case 'n_STRING_SCALAR':
- case 'n_NUMERIC_SCALAR':
- // Scalars: array(1 => 'v1', '1' => 'v2');
- $key = 'scalar:'.(string)$key_node->evalStatic();
- break;
-
- case 'n_SYMBOL_NAME':
- case 'n_VARIABLE':
- case 'n_CLASS_STATIC_ACCESS':
- // Constants: array(CONST => 'v1', CONST => 'v2');
- // Variables: array($a => 'v1', $a => 'v2');
- // Class constants and vars: array(C::A => 'v1', C::A => 'v2');
- $key = $key_node->getTypeName().':'.$key_node->getConcreteString();
- break;
-
- default:
- $key = null;
- break;
- }
-
- if ($key !== null) {
- if (isset($nodes_by_key[$key])) {
- $keys_warn[$key] = true;
- }
- $nodes_by_key[$key][] = $key_node;
- }
- }
-
- foreach ($keys_warn as $key => $_) {
- $node = array_pop($nodes_by_key[$key]);
- $message = $this->raiseLintAtNode(
- $node,
- self::LINT_DUPLICATE_KEYS_IN_ARRAY,
- 'Duplicate key in array initializer. PHP will ignore all '.
- 'but the last entry.');
-
- $locations = array();
- foreach ($nodes_by_key[$key] as $node) {
- $locations[] = $this->getOtherLocation($node->getOffset());
- }
- $message->setOtherLocations($locations);
- }
- }
- }
-
- private function lintClosingCallParen(XHPASTNode $root) {
- $calls = $root->selectDescendantsOfType('n_FUNCTION_CALL');
- $calls = $calls->add($root->selectDescendantsOfType('n_METHOD_CALL'));
-
- foreach ($calls as $call) {
- // If the last parameter of a call is a HEREDOC, don't apply this rule.
- $params = $call
- ->getChildOfType(1, 'n_CALL_PARAMETER_LIST')
- ->getChildren();
-
- if ($params) {
- $last_param = last($params);
- if ($last_param->getTypeName() === 'n_HEREDOC') {
- continue;
- }
- }
-
- $tokens = $call->getTokens();
- $last = array_pop($tokens);
-
- $trailing = $last->getNonsemanticTokensBefore();
- $trailing_text = implode('', mpull($trailing, 'getValue'));
- if (preg_match('/^\s+$/', $trailing_text)) {
- $this->raiseLintAtOffset(
- $last->getOffset() - strlen($trailing_text),
- self::LINT_CLOSING_CALL_PAREN,
- 'Convention: no spaces before closing parenthesis in calls.',
- $trailing_text,
- '');
- }
- }
- }
-
- private function lintClosingDeclarationParen(XHPASTNode $root) {
- $decs = $root->selectDescendantsOfType('n_FUNCTION_DECLARATION');
- $decs = $decs->add($root->selectDescendantsOfType('n_METHOD_DECLARATION'));
-
- foreach ($decs as $dec) {
- $params = $dec->getChildOfType(3, 'n_DECLARATION_PARAMETER_LIST');
- $tokens = $params->getTokens();
- $last = array_pop($tokens);
-
- $trailing = $last->getNonsemanticTokensBefore();
- $trailing_text = implode('', mpull($trailing, 'getValue'));
- if (preg_match('/^\s+$/', $trailing_text)) {
- $this->raiseLintAtOffset(
- $last->getOffset() - strlen($trailing_text),
- self::LINT_CLOSING_DECL_PAREN,
- 'Convention: no spaces before closing parenthesis in function and '.
- 'method declarations.',
- $trailing_text,
- '');
- }
- }
- }
-
- private function lintKeywordCasing(XHPASTNode $root) {
- $keywords = array();
-
- $symbols = $root->selectDescendantsOfType('n_SYMBOL_NAME');
- foreach ($symbols as $symbol) {
- $keywords[] = head($symbol->getTokens());
- }
-
- $arrays = $root->selectDescendantsOfType('n_ARRAY_LITERAL');
- foreach ($arrays as $array) {
- $keywords[] = head($array->getTokens());
- }
-
- $typehints = $root->selectDescendantsOfType('n_TYPE_NAME');
- foreach ($typehints as $typehint) {
- $keywords[] = head($typehint->getTokens());
- }
-
- $new_invocations = $root->selectDescendantsOfType('n_NEW');
- foreach ($new_invocations as $invocation) {
- $keywords[] = head($invocation->getTokens());
- }
-
- $class_declarations = $root->selectDescendantsOfType('n_CLASS_DECLARATION');
- foreach ($class_declarations as $declaration) {
- $keywords[] = head($declaration->getTokens());
- }
-
- // NOTE: Although PHP generally allows arbitrary casing for all language
- // keywords, it's exceedingly rare for anyone to type, e.g., "CLASS" or
- // "cLaSs" in the wild. This list just attempts to cover unconventional
- // spellings which see some level of use, not all keywords exhaustively.
- // There is no token or node type which spans all keywords, so this is
- // significantly simpler.
-
- static $keyword_map = array(
- 'true' => 'true',
- 'false' => 'false',
- 'null' => 'null',
- 'array' => 'array',
- 'new' => 'new',
- 'class' => 'class',
- );
-
- foreach ($keywords as $keyword) {
- $value = $keyword->getValue();
- $value_key = strtolower($value);
- if (!isset($keyword_map[$value_key])) {
- continue;
- }
- $expected_spelling = $keyword_map[$value_key];
- if ($value !== $expected_spelling) {
- $this->raiseLintAtToken(
- $keyword,
- self::LINT_KEYWORD_CASING,
- "Convention: spell keyword '{$value}' as '{$expected_spelling}'.",
- $expected_spelling);
- }
- }
- }
-
- private function lintStrings(XHPASTNode $root) {
- $nodes = $root->selectDescendantsOfTypes(array(
- 'n_CONCATENATION_LIST',
- 'n_STRING_SCALAR',
- ));
-
- foreach ($nodes as $node) {
- $strings = array();
-
- if ($node->getTypeName() === 'n_CONCATENATION_LIST') {
- $strings = $node->selectDescendantsOfType('n_STRING_SCALAR');
- } else if ($node->getTypeName() === 'n_STRING_SCALAR') {
- $strings = array($node);
-
- if ($node->getParentNode()->getTypeName() === 'n_CONCATENATION_LIST') {
- continue;
- }
- }
-
- $valid = false;
- $invalid_nodes = array();
- $fixes = array();
-
- foreach ($strings as $string) {
- $concrete_string = $string->getConcreteString();
- $single_quoted = ($concrete_string[0] === "'");
- $contents = substr($concrete_string, 1, -1);
-
- // Double quoted strings are allowed when the string contains the
- // following characters.
- static $allowed_chars = array(
- '\n',
- '\r',
- '\t',
- '\v',
- '\e',
- '\f',
- '\'',
- '\0',
- '\1',
- '\2',
- '\3',
- '\4',
- '\5',
- '\6',
- '\7',
- '\x',
- );
-
- $contains_special_chars = false;
- foreach ($allowed_chars as $allowed_char) {
- if (strpos($contents, $allowed_char) !== false) {
- $contains_special_chars = true;
- }
- }
-
- if (!$string->isConstantString()) {
- $valid = true;
- } else if ($contains_special_chars && !$single_quoted) {
- $valid = true;
- } else if (!$contains_special_chars && !$single_quoted) {
- $invalid_nodes[] = $string;
- $fixes[$string->getID()] = "'".str_replace('\"', '"', $contents)."'";
- }
- }
-
- if (!$valid) {
- foreach ($invalid_nodes as $invalid_node) {
- $this->raiseLintAtNode(
- $invalid_node,
- self::LINT_DOUBLE_QUOTE,
- pht(
- 'String does not require double quotes. For consistency, '.
- 'prefer single quotes.'),
- $fixes[$invalid_node->getID()]);
- }
- }
- }
- }
-
- protected function lintElseIfStatements(XHPASTNode $root) {
- $tokens = $root->selectTokensOfType('T_ELSEIF');
-
- foreach ($tokens as $token) {
- $this->raiseLintAtToken(
- $token,
- self::LINT_ELSEIF_USAGE,
- pht('Usage of `else if` is preferred over `elseif`.'),
- 'else if');
- }
- }
-
- protected function lintSemicolons(XHPASTNode $root) {
- $tokens = $root->selectTokensOfType(';');
-
- foreach ($tokens as $token) {
- $prev = $token->getPrevToken();
-
- if ($prev->isAnyWhitespace()) {
- $this->raiseLintAtToken(
- $prev,
- self::LINT_SEMICOLON_SPACING,
- pht('Space found before semicolon.'),
- '');
- }
- }
- }
-
- protected function lintLanguageConstructParentheses(XHPASTNode $root) {
- $nodes = $root->selectDescendantsOfTypes(array(
- 'n_INCLUDE_FILE',
- 'n_ECHO_LIST',
- ));
-
- foreach ($nodes as $node) {
- $child = head($node->getChildren());
-
- if ($child->getTypeName() === 'n_PARENTHETICAL_EXPRESSION') {
- list($before, $after) = $child->getSurroundingNonsemanticTokens();
-
- $replace = preg_replace(
- '/^\((.*)\)$/',
- '$1',
- $child->getConcreteString());
-
- if (!$before) {
- $replace = ' '.$replace;
- }
-
- $this->raiseLintAtNode(
- $child,
- self::LINT_LANGUAGE_CONSTRUCT_PAREN,
- pht('Language constructs do not require parentheses.'),
- $replace);
- }
- }
- }
-
- protected function lintEmptyBlockStatements(XHPASTNode $root) {
- $nodes = $root->selectDescendantsOfType('n_STATEMENT_LIST');
-
- foreach ($nodes as $node) {
- $tokens = $node->getTokens();
- $token = head($tokens);
-
- if (count($tokens) <= 2) {
- continue;
- }
-
- // Safety check... if the first token isn't an opening brace then
- // there's nothing to do here.
- if ($token->getTypeName() != '{') {
- continue;
- }
-
- $only_whitespace = true;
- for ($token = $token->getNextToken();
- $token && $token->getTypeName() != '}';
- $token = $token->getNextToken()) {
- $only_whitespace = $only_whitespace && $token->isAnyWhitespace();
- }
-
- if (count($tokens) > 2 && $only_whitespace) {
- $this->raiseLintAtNode(
- $node,
- self::LINT_EMPTY_STATEMENT,
- pht(
- "Braces for an empty block statement shouldn't ".
- "contain only whitespace."),
- '{}');
- }
- }
- }
-
- protected function lintArraySeparator(XHPASTNode $root) {
- $arrays = $root->selectDescendantsOfType('n_ARRAY_LITERAL');
-
- foreach ($arrays as $array) {
- $value_list = $array->getChildOfType(0, 'n_ARRAY_VALUE_LIST');
- $values = $value_list->getChildrenOfType('n_ARRAY_VALUE');
-
- if (!$values) {
- // There is no need to check an empty array.
- continue;
- }
-
- $multiline = $array->getLineNumber() != $array->getEndLineNumber();
-
- $value = last($values);
- $after = last($value->getTokens())->getNextToken();
-
- if ($multiline && (!$after || $after->getValue() != ',')) {
- if ($value->getChildByIndex(1)->getTypeName() == 'n_HEREDOC') {
- continue;
- }
-
- $this->raiseLintAtNode(
- $value,
- self::LINT_ARRAY_SEPARATOR,
- pht('Multi-lined arrays should have trailing commas.'),
- $value->getConcreteString().',');
- } else if (!$multiline && $after && $after->getValue() == ',') {
- $this->raiseLintAtToken(
- $after,
- self::LINT_ARRAY_SEPARATOR,
- pht('Single lined arrays should not have a trailing comma.'),
- '');
- }
- }
- }
-
- private function lintConstructorParentheses(XHPASTNode $root) {
- $nodes = $root->selectDescendantsOfType('n_NEW');
-
- foreach ($nodes as $node) {
- $class = $node->getChildByIndex(0);
- $params = $node->getChildByIndex(1);
-
- if ($params->getTypeName() == 'n_EMPTY') {
- $this->raiseLintAtNode(
- $class,
- self::LINT_CONSTRUCTOR_PARENTHESES,
- pht('Use parentheses when invoking a constructor.'),
- $class->getConcreteString().'()');
- }
- }
- }
-
- private function lintSwitchStatements(XHPASTNode $root) {
- $switch_statements = $root->selectDescendantsOfType('n_SWITCH');
-
- foreach ($switch_statements as $switch_statement) {
- $case_statements = $switch_statement
- ->getChildOfType(1, 'n_STATEMENT_LIST')
- ->getChildrenOfType('n_CASE');
- $nodes_by_case = array();
-
- foreach ($case_statements as $case_statement) {
- $case = $case_statement
- ->getChildByIndex(0)
- ->getSemanticString();
- $nodes_by_case[$case][] = $case_statement;
- }
-
- foreach ($nodes_by_case as $case => $nodes) {
- if (count($nodes) <= 1) {
- continue;
- }
-
- $node = array_pop($nodes_by_case[$case]);
- $message = $this->raiseLintAtNode(
- $node,
- self::LINT_DUPLICATE_SWITCH_CASE,
- pht(
- 'Duplicate case in switch statement. PHP will ignore all '.
- 'but the first case.'));
-
- $locations = array();
- foreach ($nodes_by_case[$case] as $node) {
- $locations[] = $this->getOtherLocation($node->getOffset());
- }
- $message->setOtherLocations($locations);
- }
- }
- }
-
- private function lintBlacklistedFunction(XHPASTNode $root) {
- $calls = $root->selectDescendantsOfType('n_FUNCTION_CALL');
-
- foreach ($calls as $call) {
- $node = $call->getChildByIndex(0);
- $name = $node->getConcreteString();
-
- $reason = idx($this->blacklistedFunctions, $name);
-
- if ($reason) {
- $this->raiseLintAtNode(
- $node,
- self::LINT_BLACKLISTED_FUNCTION,
- $reason);
- }
- }
- }
-
- private function lintMethodModifier(XHPASTNode $root) {
- static $visibilities = array(
- 'public',
- 'protected',
- 'private',
- );
-
- $methods = $root->selectDescendantsOfType('n_METHOD_DECLARATION');
-
- foreach ($methods as $method) {
- $modifiers_list = $method->getChildOfType(
- 0,
- 'n_METHOD_MODIFIER_LIST');
-
- foreach ($modifiers_list->getChildren() as $modifier) {
- if (in_array($modifier->getConcreteString(), $visibilities)) {
- continue 2;
- }
- }
-
- if ($modifiers_list->getChildren()) {
- $node = $modifiers_list;
- } else {
- $node = $method;
- }
-
- $this->raiseLintAtNode(
- $node,
- self::LINT_IMPLICIT_VISIBILITY,
- pht('Methods should have their visibility declared explicitly.'),
- 'public '.$node->getConcreteString());
- }
- }
-
- private function lintPropertyModifier(XHPASTNode $root) {
- static $visibilities = array(
- 'public',
- 'protected',
- 'private',
- );
-
- $nodes = $root->selectDescendantsOfType('n_CLASS_MEMBER_MODIFIER_LIST');
-
- foreach ($nodes as $node) {
- $modifiers = $node->getChildren();
-
- foreach ($modifiers as $modifier) {
- if ($modifier->getConcreteString() == 'var') {
- $this->raiseLintAtNode(
- $modifier,
- self::LINT_IMPLICIT_VISIBILITY,
- pht(
- 'Use `%s` instead of `%s` to indicate public visibility.',
- 'public',
- 'var'),
- 'public');
- continue 2;
- }
-
- if (in_array($modifier->getConcreteString(), $visibilities)) {
- continue 2;
- }
- }
-
- $this->raiseLintAtNode(
- $node,
- self::LINT_IMPLICIT_VISIBILITY,
- pht('Properties should have their visibility declared explicitly.'),
- 'public '.$node->getConcreteString());
- }
- }
-
- private function lintCallTimePassByReference(XHPASTNode $root) {
- $nodes = $root->selectDescendantsOfType('n_CALL_PARAMETER_LIST');
-
- foreach ($nodes as $node) {
- $parameters = $node->selectDescendantsOfType('n_VARIABLE_REFERENCE');
-
- foreach ($parameters as $parameter) {
- $this->raiseLintAtNode(
- $parameter,
- self::LINT_CALL_TIME_PASS_BY_REF,
- pht('Call-time pass-by-reference calls are prohibited.'));
- }
- }
- }
-
- public function getSuperGlobalNames() {
- return array(
- '$GLOBALS',
- '$_SERVER',
- '$_GET',
- '$_POST',
- '$_FILES',
- '$_COOKIE',
- '$_SESSION',
- '$_REQUEST',
- '$_ENV',
- );
- }
-
}
diff --git a/src/lint/linter/__tests__/xhpast/reused-iterator-reference.lint-test b/src/lint/linter/__tests__/xhpast/reused-iterator-reference.lint-test
--- a/src/lint/linter/__tests__/xhpast/reused-iterator-reference.lint-test
+++ b/src/lint/linter/__tests__/xhpast/reused-iterator-reference.lint-test
@@ -131,3 +131,6 @@
error:87:3
warning:110:5
warning:120:3
+~~~~~~~~~~
+~~~~~~~~~~
+{"config": {"xhpast.php-version": "5.3.0"}}
diff --git a/src/lint/linter/__tests__/xhpast/switches.lint-test b/src/lint/linter/__tests__/xhpast/switches.lint-test
--- a/src/lint/linter/__tests__/xhpast/switches.lint-test
+++ b/src/lint/linter/__tests__/xhpast/switches.lint-test
@@ -93,4 +93,4 @@
warning:75:3
~~~~~~~~~~
~~~~~~~~~~
-{"config":{"xhpast.switchhook":"ArcanistXHPASTLintTestSwitchHook"}}
+{"config":{"xhpast.switchhook":"ArcanistXHPASTLintTestSwitchHook", "xhpast.php-version": "5.3.0"}}
diff --git a/src/lint/linter/xhpast/ArcanistXHPASTLinterRule.php b/src/lint/linter/xhpast/ArcanistXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/ArcanistXHPASTLinterRule.php
@@ -0,0 +1,160 @@
+<?php
+
+abstract class ArcanistXHPASTLinterRule {
+
+ private $linter = null;
+
+ public final function getLintID() {
+ $class = new ReflectionClass($this);
+
+ $const = $class->getConstant('ID');
+ if ($const === false) {
+ throw new Exception(
+ pht(
+ '`%s` class `%s` must define an ID constant.',
+ __CLASS__,
+ get_class($this)));
+ }
+
+ if (!is_int($const)) {
+ throw new Exception(
+ pht(
+ '`%s` class `%s` has an invalid ID constant. ID must be an integer.',
+ __CLASS__,
+ get_class($this)));
+ }
+
+ return $const;
+ }
+
+ public abstract function getLintName();
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_ERROR;
+ }
+
+ public function getLinterConfigurationOptions() {
+ return array();
+ }
+
+ public function setLinterConfigurationValue($key, $value) {}
+
+ public abstract function process(XHPASTNode $root);
+
+ public final function setLinter(ArcanistXHPASTLinter $linter) {
+ $this->linter = $linter;
+ }
+
+ protected final function raiseLintAtNode(
+ XHPASTNode $node,
+ $desc,
+ $replace = null) {
+
+ // TODO: This is an ugly hack.
+ $method = new ReflectionMethod($this->linter, 'raiseLintAtNode');
+ $method->setAccessible(true);
+
+ return $method->invoke(
+ $this->linter,
+ $node,
+ $this->getLintID(),
+ $desc,
+ $replace);
+ }
+
+ protected final function raiseLintAtOffset(
+ $offset,
+ $desc,
+ $text = null,
+ $replace = null) {
+
+ // TODO: This is an ugly hack.
+ $method = new ReflectionMethod($this->linter, 'raiseLintAtOffset');
+ $method->setAccessible(true);
+
+ return $method->invoke(
+ $this->linter,
+ $offset,
+ $this->getLintID(),
+ $desc,
+ $text,
+ $replace);
+ }
+
+ protected final function raiseLintAtToken(
+ XHPASTToken $token,
+ $desc,
+ $replace = null) {
+
+ // TODO: This is an ugly hack.
+ $method = new ReflectionMethod($this->linter, 'raiseLintAtToken');
+ $method->setAccessible(true);
+
+ return $method->invoke(
+ $this->linter,
+ $token,
+ $this->getLintID(),
+ $desc,
+ $replace);
+ }
+
+ public final function getActivePath() {
+ return $this->linter->getActivePath();
+ }
+
+ public final function getOtherLocation($offset, $path = null) {
+ return $this->linter->getOtherLocation($offset, $path);
+ }
+
+ public final function getEngine() {
+ // TODO: This is an ugly hack.
+ $method = new ReflectionMethod($this->linter, 'getEngine');
+ $method->setAccessible(true);
+
+ return $method->invoke($this->linter);
+ }
+
+ /**
+ * Statically evaluate a boolean value from an XHP tree.
+ *
+ * TODO: Improve this and move it to XHPAST proper?
+ *
+ * @param string The "semantic string" of a single value.
+ * @return mixed `true` or `false` if the value could be evaluated
+ * statically; `null` if static evaluation was not possible.
+ */
+ protected function evaluateStaticBoolean($string) {
+ switch (strtolower($string)) {
+ case '0':
+ case 'null':
+ case 'false':
+ return false;
+ case '1':
+ case 'true':
+ return true;
+ }
+ return null;
+ }
+
+ protected function getConcreteVariableString(XHPASTNode $var) {
+ $concrete = $var->getConcreteString();
+ // Strip off curly braces as in `$obj->{$property}`.
+ $concrete = trim($concrete, '{}');
+ return $concrete;
+ }
+
+ protected function getSuperGlobalNames() {
+ return array(
+ '$GLOBALS',
+ '$_SERVER',
+ '$_GET',
+ '$_POST',
+ '$_FILES',
+ '$_COOKIE',
+ '$_SESSION',
+ '$_REQUEST',
+ '$_ENV',
+ );
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistArrayIndexSpacingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistArrayIndexSpacingXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistArrayIndexSpacingXHPASTLinterRule.php
@@ -0,0 +1,35 @@
+<?php
+
+final class ArcanistArrayIndexSpacingXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 28;
+
+ public function getLintName() {
+ return pht('Spacing Before Array Index');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ public function process(XHPASTNode $root) {
+ $indexes = $root->selectDescendantsOfType('n_INDEX_ACCESS');
+
+ foreach ($indexes as $index) {
+ $tokens = $index->getChildByIndex(0)->getTokens();
+ $last = array_pop($tokens);
+ $trailing = $last->getNonsemanticTokensAfter();
+ $trailing_text = implode('', mpull($trailing, 'getValue'));
+
+ if (preg_match('/^ +$/', $trailing_text)) {
+ $this->raiseLintAtOffset(
+ $last->getOffset() + strlen($last->getValue()),
+ pht('Convention: no spaces before index access.'),
+ $trailing_text,
+ '');
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistArraySeparatorXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistArraySeparatorXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistArraySeparatorXHPASTLinterRule.php
@@ -0,0 +1,51 @@
+<?php
+
+final class ArcanistArraySeparatorXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 48;
+
+ public function getLintName() {
+ return pht('Array Separator');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_ADVICE;
+ }
+
+ public function process(XHPASTNode $root) {
+ $arrays = $root->selectDescendantsOfType('n_ARRAY_LITERAL');
+
+ foreach ($arrays as $array) {
+ $value_list = $array->getChildOfType(0, 'n_ARRAY_VALUE_LIST');
+ $values = $value_list->getChildrenOfType('n_ARRAY_VALUE');
+
+ if (!$values) {
+ // There is no need to check an empty array.
+ continue;
+ }
+
+ $multiline = $array->getLineNumber() != $array->getEndLineNumber();
+
+ $value = last($values);
+ $after = last($value->getTokens())->getNextToken();
+
+ if ($multiline && (!$after || $after->getValue() != ',')) {
+ if ($value->getChildByIndex(1)->getTypeName() == 'n_HEREDOC') {
+ continue;
+ }
+
+ $this->raiseLintAtNode(
+ $value,
+ pht('Multi-lined arrays should have trailing commas.'),
+ $value->getConcreteString().',');
+ } else if (!$multiline && $after && $after->getValue() == ',') {
+ $this->raiseLintAtToken(
+ $after,
+ pht('Single lined arrays should not have a trailing comma.'),
+ '');
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistBinaryExpressionSpacingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistBinaryExpressionSpacingXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistBinaryExpressionSpacingXHPASTLinterRule.php
@@ -0,0 +1,117 @@
+<?php
+
+final class ArcanistBinaryExpressionSpacingXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 27;
+
+ public function getLintName() {
+ return pht('Space Around Binary Operator');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ public function process(XHPASTNode $root) {
+ $expressions = $root->selectDescendantsOfType('n_BINARY_EXPRESSION');
+
+ foreach ($expressions as $expression) {
+ $operator = $expression->getChildByIndex(1);
+ $operator_value = $operator->getConcreteString();
+ list($before, $after) = $operator->getSurroundingNonsemanticTokens();
+
+ $replace = null;
+ if (empty($before) && empty($after)) {
+ $replace = " {$operator_value} ";
+ } else if (empty($before)) {
+ $replace = " {$operator_value}";
+ } else if (empty($after)) {
+ $replace = "{$operator_value} ";
+ }
+
+ if ($replace !== null) {
+ $this->raiseLintAtNode(
+ $operator,
+ pht(
+ 'Convention: logical and arithmetic operators should be '.
+ 'surrounded by whitespace.'),
+ $replace);
+ }
+ }
+
+ $tokens = $root->selectTokensOfType(',');
+ foreach ($tokens as $token) {
+ $next = $token->getNextToken();
+ switch ($next->getTypeName()) {
+ case ')':
+ case 'T_WHITESPACE':
+ break;
+ default:
+ $this->raiseLintAtToken(
+ $token,
+ pht('Convention: comma should be followed by space.'),
+ ', ');
+ break;
+ }
+ }
+
+ $tokens = $root->selectTokensOfType('T_DOUBLE_ARROW');
+ foreach ($tokens as $token) {
+ $prev = $token->getPrevToken();
+ $next = $token->getNextToken();
+
+ $prev_type = $prev->getTypeName();
+ $next_type = $next->getTypeName();
+
+ $prev_space = ($prev_type === 'T_WHITESPACE');
+ $next_space = ($next_type === 'T_WHITESPACE');
+
+ $replace = null;
+ if (!$prev_space && !$next_space) {
+ $replace = ' => ';
+ } else if ($prev_space && !$next_space) {
+ $replace = '=> ';
+ } else if (!$prev_space && $next_space) {
+ $replace = ' =>';
+ }
+
+ if ($replace !== null) {
+ $this->raiseLintAtToken(
+ $token,
+ pht('Convention: double arrow should be surrounded by whitespace.'),
+ $replace);
+ }
+ }
+
+ $parameters = $root->selectDescendantsOfType('n_DECLARATION_PARAMETER');
+ foreach ($parameters as $parameter) {
+ if ($parameter->getChildByIndex(2)->getTypeName() == 'n_EMPTY') {
+ continue;
+ }
+
+ $operator = head($parameter->selectTokensOfType('='));
+ $before = $operator->getNonsemanticTokensBefore();
+ $after = $operator->getNonsemanticTokensAfter();
+
+ $replace = null;
+ if (empty($before) && empty($after)) {
+ $replace = ' = ';
+ } else if (empty($before)) {
+ $replace = ' =';
+ } else if (empty($after)) {
+ $replace = '= ';
+ }
+
+ if ($replace !== null) {
+ $this->raiseLintAtToken(
+ $operator,
+ pht(
+ 'Convention: logical and arithmetic operators should be '.
+ 'surrounded by whitespace.'),
+ $replace);
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistBlacklistedFunctionXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistBlacklistedFunctionXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistBlacklistedFunctionXHPASTLinterRule.php
@@ -0,0 +1,49 @@
+<?php
+
+final class ArcanistBlacklistedFunctionXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 51;
+
+ private $blacklistedFunctions = array();
+
+ public function getLintName() {
+ return pht('Use of Blacklisted Function');
+ }
+
+ public function getLinterConfigurationOptions() {
+ return parent::getLinterConfigurationOptions() + array(
+ 'xhpast.blacklisted.function' => array(
+ 'type' => 'optional map<string, string>',
+ 'help' => pht('Blacklisted functions which should not be used.'),
+ ),
+ );
+ }
+
+ public function setLinterConfigurationValue($key, $value) {
+ switch ($key) {
+ case 'xhpast.blacklisted.function':
+ $this->blacklistedFunctions = $value;
+ return;
+
+ default:
+ return parent::getLinterConfigurationOptions();
+ }
+ }
+
+ public function process(XHPASTNode $root) {
+ $calls = $root->selectDescendantsOfType('n_FUNCTION_CALL');
+
+ foreach ($calls as $call) {
+ $node = $call->getChildByIndex(0);
+ $name = $node->getConcreteString();
+
+ $reason = idx($this->blacklistedFunctions, $name);
+
+ if ($reason) {
+ $this->raiseLintAtNode($node, $reason);
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistBraceFormattingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistBraceFormattingXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistBraceFormattingXHPASTLinterRule.php
@@ -0,0 +1,103 @@
+<?php
+
+final class ArcanistBraceFormattingXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 24;
+
+ public function getLintName() {
+ return pht('Brace Placement');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ public function process(XHPASTNode $root) {
+ foreach ($root->selectDescendantsOfType('n_STATEMENT_LIST') as $list) {
+ $tokens = $list->getTokens();
+ if (!$tokens || head($tokens)->getValue() != '{') {
+ continue;
+ }
+ list($before, $after) = $list->getSurroundingNonsemanticTokens();
+ if (!$before) {
+ $first = head($tokens);
+
+ // Only insert the space if we're after a closing parenthesis. If
+ // we're in a construct like "else{}", other rules will insert space
+ // after the 'else' correctly.
+ $prev = $first->getPrevToken();
+ if (!$prev || $prev->getValue() !== ')') {
+ continue;
+ }
+
+ $this->raiseLintAtToken(
+ $first,
+ pht(
+ 'Put opening braces on the same line as control statements and '.
+ 'declarations, with a single space before them.'),
+ ' '.$first->getValue());
+ } else if (count($before) === 1) {
+ $before = reset($before);
+ if ($before->getValue() !== ' ') {
+ $this->raiseLintAtToken(
+ $before,
+ pht(
+ 'Put opening braces on the same line as control statements and '.
+ 'declarations, with a single space before them.'),
+ ' ');
+ }
+ }
+ }
+
+ $nodes = $root->selectDescendantsOfType('n_STATEMENT');
+ foreach ($nodes as $node) {
+ $parent = $node->getParentNode();
+
+ if (!$parent) {
+ continue;
+ }
+
+ $type = $parent->getTypeName();
+ if ($type != 'n_STATEMENT_LIST' && $type != 'n_DECLARE') {
+ $this->raiseLintAtNode(
+ $node,
+ pht('Use braces to surround a statement block.'));
+ }
+ }
+
+ $nodes = $root->selectDescendantsOfTypes(array(
+ 'n_DO_WHILE',
+ 'n_ELSE',
+ 'n_ELSEIF',
+ ));
+ foreach ($nodes as $list) {
+ $tokens = $list->getTokens();
+ if (!$tokens || last($tokens)->getValue() != '}') {
+ continue;
+ }
+ list($before, $after) = $list->getSurroundingNonsemanticTokens();
+ if (!$before) {
+ $first = last($tokens);
+
+ $this->raiseLintAtToken(
+ $first,
+ pht(
+ 'Put opening braces on the same line as control statements and '.
+ 'declarations, with a single space before them.'),
+ ' '.$first->getValue());
+ } else if (count($before) === 1) {
+ $before = reset($before);
+ if ($before->getValue() !== ' ') {
+ $this->raiseLintAtToken(
+ $before,
+ pht(
+ 'Put opening braces on the same line as control statements and '.
+ 'declarations, with a single space before them.'),
+ ' ');
+ }
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistCallFormattingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistCallFormattingXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistCallFormattingXHPASTLinterRule.php
@@ -0,0 +1,48 @@
+<?php
+
+final class ArcanistCallFormattingXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 37;
+
+ public function getLintName() {
+ return pht('Call Formatting');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ public function process(XHPASTNode $root) {
+ $calls = $root->selectDescendantsOfType('n_FUNCTION_CALL');
+ $calls = $calls->add($root->selectDescendantsOfType('n_METHOD_CALL'));
+
+ foreach ($calls as $call) {
+ // If the last parameter of a call is a HEREDOC, don't apply this rule.
+ $params = $call
+ ->getChildOfType(1, 'n_CALL_PARAMETER_LIST')
+ ->getChildren();
+
+ if ($params) {
+ $last_param = last($params);
+ if ($last_param->getTypeName() === 'n_HEREDOC') {
+ continue;
+ }
+ }
+
+ $tokens = $call->getTokens();
+ $last = array_pop($tokens);
+
+ $trailing = $last->getNonsemanticTokensBefore();
+ $trailing_text = implode('', mpull($trailing, 'getValue'));
+ if (preg_match('/^\s+$/', $trailing_text)) {
+ $this->raiseLintAtOffset(
+ $last->getOffset() - strlen($trailing_text),
+ pht('Convention: no spaces before closing parenthesis in calls.'),
+ $trailing_text,
+ '');
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistCallTimePassByReferenceXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistCallTimePassByReferenceXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistCallTimePassByReferenceXHPASTLinterRule.php
@@ -0,0 +1,26 @@
+<?php
+
+final class ArcanistCallTimePassByReferenceXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 53;
+
+ public function getLintName() {
+ return pht('Call-Time Pass-By-Reference');
+ }
+
+ public function process(XHPASTNode $root) {
+ $nodes = $root->selectDescendantsOfType('n_CALL_PARAMETER_LIST');
+
+ foreach ($nodes as $node) {
+ $parameters = $node->selectDescendantsOfType('n_VARIABLE_REFERENCE');
+
+ foreach ($parameters as $parameter) {
+ $this->raiseLintAtNode(
+ $parameter,
+ pht('Call-time pass-by-reference calls are prohibited.'));
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistClassFilenameMismatchXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistClassFilenameMismatchXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistClassFilenameMismatchXHPASTLinterRule.php
@@ -0,0 +1,54 @@
+<?php
+
+final class ArcanistClassFilenameMismatchXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 19;
+
+ public function getLintName() {
+ return pht('Class-Filename Mismatch');
+ }
+
+ /**
+ * Lint that if the file declares exactly one interface or class, the name of
+ * the file matches the name of the class, unless the classname is funky like
+ * an XHP element.
+ */
+ public function process(XHPASTNode $root) {
+ $classes = $root->selectDescendantsOfType('n_CLASS_DECLARATION');
+ $interfaces = $root->selectDescendantsOfType('n_INTERFACE_DECLARATION');
+
+ if (count($classes) + count($interfaces) !== 1) {
+ return;
+ }
+
+ $declarations = count($classes) ? $classes : $interfaces;
+ $declarations->rewind();
+ $declaration = $declarations->current();
+
+ $decl_name = $declaration->getChildByIndex(1);
+ $decl_string = $decl_name->getConcreteString();
+
+ // Exclude strangely named classes, e.g. XHP tags.
+ if (!preg_match('/^\w+$/', $decl_string)) {
+ return;
+ }
+
+ $rename = $decl_string.'.php';
+
+ $path = $this->getActivePath();
+ $filename = basename($path);
+
+ if ($rename === $filename) {
+ return;
+ }
+
+ $this->raiseLintAtNode(
+ $decl_name,
+ pht(
+ "The name of this file differs from the name of the class ".
+ "or interface it declares. Rename the file to '%s'.",
+ $rename));
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistCommentSpacingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistCommentSpacingXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistCommentSpacingXHPASTLinterRule.php
@@ -0,0 +1,33 @@
+<?php
+
+final class ArcanistCommentSpacingXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 34;
+
+ public function getLintName() {
+ return pht('Comment Spaces');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_ADVICE;
+ }
+
+ public function process(XHPASTNode $root) {
+ foreach ($root->selectTokensOfType('T_COMMENT') as $comment) {
+ $value = $comment->getValue();
+
+ if ($value[0] !== '#') {
+ $match = null;
+ if (preg_match('@^(/[/*]+)[^/*\s]@', $value, $match)) {
+ $this->raiseLintAtOffset(
+ $comment->getOffset(),
+ pht('Put space after comment start.'),
+ $match[1],
+ $match[1].' ');
+ }
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistCommentStyleXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistCommentStyleXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistCommentStyleXHPASTLinterRule.php
@@ -0,0 +1,27 @@
+<?php
+
+final class ArcanistCommentStyleXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 18;
+
+ public function getLintName() {
+ return pht('Comment Style');
+ }
+
+ public function process(XHPASTNode $root) {
+ foreach ($root->selectTokensOfType('T_COMMENT') as $comment) {
+ $value = $comment->getValue();
+ if ($value[0] !== '#') {
+ continue;
+ }
+
+ $this->raiseLintAtOffset(
+ $comment->getOffset(),
+ pht('Use `%s` single-line comments, not `%s`.', '//', '#'),
+ '#',
+ preg_match('/^#\S/', $value) ? '// ' : '//');
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistConcatenationSpacingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistConcatenationSpacingXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistConcatenationSpacingXHPASTLinterRule.php
@@ -0,0 +1,50 @@
+<?php
+
+final class ArcanistConcatenationSpacingXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 44;
+
+ public function getLintName() {
+ return pht('Concatenation Spacing');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ public function process(XHPASTNode $root) {
+ $tokens = $root->selectTokensOfType('.');
+
+ foreach ($tokens as $token) {
+ $prev = $token->getPrevToken();
+ $next = $token->getNextToken();
+
+ foreach (array('prev' => $prev, 'next' => $next) as $wtoken) {
+ if ($wtoken->getTypeName() !== 'T_WHITESPACE') {
+ continue;
+ }
+
+ $value = $wtoken->getValue();
+ if (strpos($value, "\n") !== false) {
+ // If the whitespace has a newline, it's conventional.
+ continue;
+ }
+
+ $next = $wtoken->getNextToken();
+ if ($next && $next->getTypeName() === 'T_COMMENT') {
+ continue;
+ }
+
+ $this->raiseLintAtToken(
+ $wtoken,
+ pht(
+ 'Convention: no spaces around `%s` (string concatenation) '.
+ 'operator.',
+ '.'),
+ '');
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistConstructorParenthesesXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistConstructorParenthesesXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistConstructorParenthesesXHPASTLinterRule.php
@@ -0,0 +1,32 @@
+<?php
+
+final class ArcanistConstructorParenthesesXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 49;
+
+ public function getLintName() {
+ return pht('Constructor Parentheses');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_ADVICE;
+ }
+
+ public function process(XHPASTNode $root) {
+ $nodes = $root->selectDescendantsOfType('n_NEW');
+
+ foreach ($nodes as $node) {
+ $class = $node->getChildByIndex(0);
+ $params = $node->getChildByIndex(1);
+
+ if ($params->getTypeName() == 'n_EMPTY') {
+ $this->raiseLintAtNode(
+ $class,
+ pht('Use parentheses when invoking a constructor.'),
+ $class->getConcreteString().'()');
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistControlStatementSpacingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistControlStatementSpacingXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistControlStatementSpacingXHPASTLinterRule.php
@@ -0,0 +1,61 @@
+<?php
+
+final class ArcanistControlStatementSpacingXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 26;
+
+ public function getLintName() {
+ return pht('Space After Control Statement');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ public function process(XHPASTNode $root) {
+ foreach ($root->getTokens() as $id => $token) {
+ switch ($token->getTypeName()) {
+ case 'T_IF':
+ case 'T_ELSE':
+ case 'T_FOR':
+ case 'T_FOREACH':
+ case 'T_WHILE':
+ case 'T_DO':
+ case 'T_SWITCH':
+ $after = $token->getNonsemanticTokensAfter();
+ if (empty($after)) {
+ $this->raiseLintAtToken(
+ $token,
+ pht('Convention: put a space after control statements.'),
+ $token->getValue().' ');
+ } else if (count($after) === 1) {
+ $space = head($after);
+
+ // If we have an else clause with braces, $space may not be
+ // a single white space. e.g.,
+ //
+ // if ($x)
+ // echo 'foo'
+ // else // <- $space is not " " but "\n ".
+ // echo 'bar'
+ //
+ // We just require it starts with either a whitespace or a newline.
+ if ($token->getTypeName() === 'T_ELSE' ||
+ $token->getTypeName() === 'T_DO') {
+ break;
+ }
+
+ if ($space->isAnyWhitespace() && $space->getValue() !== ' ') {
+ $this->raiseLintAtToken(
+ $space,
+ pht('Convention: put a single space after control statements.'),
+ ' ');
+ }
+ }
+ break;
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistDeclarationFormattingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistDeclarationFormattingXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistDeclarationFormattingXHPASTLinterRule.php
@@ -0,0 +1,39 @@
+<?php
+
+final class ArcanistDeclarationFormattingXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 38;
+
+ public function getLintName() {
+ return pht('Declaration Formatting');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ public function process(XHPASTNode $root) {
+ $decs = $root->selectDescendantsOfType('n_FUNCTION_DECLARATION');
+ $decs = $decs->add($root->selectDescendantsOfType('n_METHOD_DECLARATION'));
+
+ foreach ($decs as $dec) {
+ $params = $dec->getChildOfType(3, 'n_DECLARATION_PARAMETER_LIST');
+ $tokens = $params->getTokens();
+ $last = array_pop($tokens);
+
+ $trailing = $last->getNonsemanticTokensBefore();
+ $trailing_text = implode('', mpull($trailing, 'getValue'));
+ if (preg_match('/^\s+$/', $trailing_text)) {
+ $this->raiseLintAtOffset(
+ $last->getOffset() - strlen($trailing_text),
+ pht(
+ 'Convention: no spaces before closing parenthesis in function '.
+ 'and method declarations.'),
+ $trailing_text,
+ '');
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistDoubleQuoteXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistDoubleQuoteXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistDoubleQuoteXHPASTLinterRule.php
@@ -0,0 +1,95 @@
+<?php
+
+final class ArcanistDoubleQuoteXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 41;
+
+ public function getLintName() {
+ return pht('Unnecessary Double Quotes');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_ADVICE;
+ }
+
+ public function process(XHPASTNode $root) {
+ $nodes = $root->selectDescendantsOfTypes(array(
+ 'n_CONCATENATION_LIST',
+ 'n_STRING_SCALAR',
+ ));
+
+ foreach ($nodes as $node) {
+ $strings = array();
+
+ if ($node->getTypeName() === 'n_CONCATENATION_LIST') {
+ $strings = $node->selectDescendantsOfType('n_STRING_SCALAR');
+ } else if ($node->getTypeName() === 'n_STRING_SCALAR') {
+ $strings = array($node);
+
+ if ($node->getParentNode()->getTypeName() === 'n_CONCATENATION_LIST') {
+ continue;
+ }
+ }
+
+ $valid = false;
+ $invalid_nodes = array();
+ $fixes = array();
+
+ foreach ($strings as $string) {
+ $concrete_string = $string->getConcreteString();
+ $single_quoted = ($concrete_string[0] === "'");
+ $contents = substr($concrete_string, 1, -1);
+
+ // Double quoted strings are allowed when the string contains the
+ // following characters.
+ static $allowed_chars = array(
+ '\n',
+ '\r',
+ '\t',
+ '\v',
+ '\e',
+ '\f',
+ '\'',
+ '\0',
+ '\1',
+ '\2',
+ '\3',
+ '\4',
+ '\5',
+ '\6',
+ '\7',
+ '\x',
+ );
+
+ $contains_special_chars = false;
+ foreach ($allowed_chars as $allowed_char) {
+ if (strpos($contents, $allowed_char) !== false) {
+ $contains_special_chars = true;
+ }
+ }
+
+ if (!$string->isConstantString()) {
+ $valid = true;
+ } else if ($contains_special_chars && !$single_quoted) {
+ $valid = true;
+ } else if (!$contains_special_chars && !$single_quoted) {
+ $invalid_nodes[] = $string;
+ $fixes[$string->getID()] = "'".str_replace('\"', '"', $contents)."'";
+ }
+ }
+
+ if (!$valid) {
+ foreach ($invalid_nodes as $invalid_node) {
+ $this->raiseLintAtNode(
+ $invalid_node,
+ pht(
+ 'String does not require double quotes. For consistency, '.
+ 'prefer single quotes.'),
+ $fixes[$invalid_node->getID()]);
+ }
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistDuplicateKeysInArrayXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistDuplicateKeysInArrayXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistDuplicateKeysInArrayXHPASTLinterRule.php
@@ -0,0 +1,74 @@
+<?php
+
+final class ArcanistDuplicateKeysInArrayXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 22;
+
+ public function getLintName() {
+ return pht('Duplicate Keys in Array');
+ }
+
+ /**
+ * Finds duplicate keys in array initializers, as in
+ * array(1 => 'anything', 1 => 'foo'). Since the first entry is ignored,
+ * this is almost certainly an error.
+ */
+ public function process(XHPASTNode $root) {
+ $array_literals = $root->selectDescendantsOfType('n_ARRAY_LITERAL');
+
+ foreach ($array_literals as $array_literal) {
+ $nodes_by_key = array();
+ $keys_warn = array();
+ $list_node = $array_literal->getChildByIndex(0);
+
+ foreach ($list_node->getChildren() as $array_entry) {
+ $key_node = $array_entry->getChildByIndex(0);
+
+ switch ($key_node->getTypeName()) {
+ case 'n_STRING_SCALAR':
+ case 'n_NUMERIC_SCALAR':
+ // Scalars: `array(1 => 'v1', '1' => 'v2');`
+ $key = 'scalar:'.(string)$key_node->evalStatic();
+ break;
+
+ case 'n_SYMBOL_NAME':
+ case 'n_VARIABLE':
+ case 'n_CLASS_STATIC_ACCESS':
+ // Constants: `array(CONST => 'v1', CONST => 'v2');`
+ // Variables: `array($a => 'v1', $a => 'v2');`
+ // Class constants and vars: `array(C::A => 'v1', C::A => 'v2');`
+ $key = $key_node->getTypeName().':'.$key_node->getConcreteString();
+ break;
+
+ default:
+ $key = null;
+ break;
+ }
+
+ if ($key !== null) {
+ if (isset($nodes_by_key[$key])) {
+ $keys_warn[$key] = true;
+ }
+ $nodes_by_key[$key][] = $key_node;
+ }
+ }
+
+ foreach ($keys_warn as $key => $_) {
+ $node = array_pop($nodes_by_key[$key]);
+ $message = $this->raiseLintAtNode(
+ $node,
+ pht(
+ 'Duplicate key in array initializer. PHP will ignore all '.
+ 'but the last entry.'));
+
+ $locations = array();
+ foreach ($nodes_by_key[$key] as $node) {
+ $locations[] = $this->getOtherLocation($node->getOffset());
+ }
+ $message->setOtherLocations($locations);
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistDuplicateSwitchCaseXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistDuplicateSwitchCaseXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistDuplicateSwitchCaseXHPASTLinterRule.php
@@ -0,0 +1,49 @@
+<?php
+
+final class ArcanistDuplicateSwitchCaseXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 50;
+
+ public function getLintName() {
+ return pht('Duplicate Case Statements');
+ }
+
+ public function process(XHPASTNode $root) {
+ $switch_statements = $root->selectDescendantsOfType('n_SWITCH');
+
+ foreach ($switch_statements as $switch_statement) {
+ $case_statements = $switch_statement
+ ->getChildOfType(1, 'n_STATEMENT_LIST')
+ ->getChildrenOfType('n_CASE');
+ $nodes_by_case = array();
+
+ foreach ($case_statements as $case_statement) {
+ $case = $case_statement
+ ->getChildByIndex(0)
+ ->getSemanticString();
+ $nodes_by_case[$case][] = $case_statement;
+ }
+
+ foreach ($nodes_by_case as $case => $nodes) {
+ if (count($nodes) <= 1) {
+ continue;
+ }
+
+ $node = array_pop($nodes_by_case[$case]);
+ $message = $this->raiseLintAtNode(
+ $node,
+ pht(
+ 'Duplicate case in switch statement. PHP will ignore all '.
+ 'but the first case.'));
+
+ $locations = array();
+ foreach ($nodes_by_case[$case] as $node) {
+ $locations[] = $this->getOtherLocation($node->getOffset());
+ }
+ $message->setOtherLocations($locations);
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistDynamicDefineXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistDynamicDefineXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistDynamicDefineXHPASTLinterRule.php
@@ -0,0 +1,32 @@
+<?php
+
+final class ArcanistDynamicDefineXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 12;
+
+ public function getLintName() {
+ return pht('Dynamic %s', 'define()');
+ }
+
+ public function process(XHPASTNode $root) {
+ $calls = $root->selectDescendantsOfType('n_FUNCTION_CALL');
+
+ foreach ($calls as $call) {
+ $name = $call->getChildByIndex(0)->getConcreteString();
+
+ if (strtolower($name) === 'define') {
+ $parameter_list = $call->getChildOfType(1, 'n_CALL_PARAMETER_LIST');
+ $defined = $parameter_list->getChildByIndex(0);
+ if (!$defined->isStaticScalar()) {
+ $this->raiseLintAtNode(
+ $defined,
+ pht(
+ 'First argument to `%s` must be a string literal.',
+ 'define()'));
+ }
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistElseIfUsageXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistElseIfUsageXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistElseIfUsageXHPASTLinterRule.php
@@ -0,0 +1,27 @@
+<?php
+
+final class ArcanistElseIfUsageXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 42;
+
+ public function getLintName() {
+ return pht('%s Usage', 'Elseif');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_ADVICE;
+ }
+
+ public function process(XHPASTNode $root) {
+ $tokens = $root->selectTokensOfType('T_ELSEIF');
+
+ foreach ($tokens as $token) {
+ $this->raiseLintAtToken(
+ $token,
+ pht('Usage of `%s` is preferred over `%s`.', 'else if', 'elseif'),
+ 'else if');
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistEmptyBlockStatementXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistEmptyBlockStatementXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistEmptyBlockStatementXHPASTLinterRule.php
@@ -0,0 +1,51 @@
+<?php
+
+final class ArcanistEmptyBlockStatementXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 47;
+
+ public function getLintName() {
+ return pht('Empty Block Statement');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_ADVICE;
+ }
+
+ public function process(XHPASTNode $root) {
+ $nodes = $root->selectDescendantsOfType('n_STATEMENT_LIST');
+
+ foreach ($nodes as $node) {
+ $tokens = $node->getTokens();
+ $token = head($tokens);
+
+ if (count($tokens) <= 2) {
+ continue;
+ }
+
+ // Safety check... if the first token isn't an opening brace then
+ // there's nothing to do here.
+ if ($token->getTypeName() != '{') {
+ continue;
+ }
+
+ $only_whitespace = true;
+ for ($token = $token->getNextToken();
+ $token && $token->getTypeName() != '}';
+ $token = $token->getNextToken()) {
+ $only_whitespace = $only_whitespace && $token->isAnyWhitespace();
+ }
+
+ if (count($tokens) > 2 && $only_whitespace) {
+ $this->raiseLintAtNode(
+ $node,
+ pht(
+ "Braces for an empty block statement shouldn't ".
+ "contain only whitespace."),
+ '{}');
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistExitExpressionXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistExitExpressionXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistExitExpressionXHPASTLinterRule.php
@@ -0,0 +1,43 @@
+<?php
+
+final class ArcanistExitExpressionXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 17;
+
+ public function getLintName() {
+ return pht('Exit Used as Expression');
+ }
+
+ /**
+ * Exit is parsed as an expression, but using it as such is almost always
+ * wrong. That is, this is valid:
+ *
+ * strtoupper(33 * exit - 6);
+ *
+ * When exit is used as an expression, it causes the program to terminate with
+ * exit code 0. This is likely not what is intended; these statements have
+ * different effects:
+ *
+ * exit(-1);
+ * exit -1;
+ *
+ * The former exits with a failure code, the latter with a success code!
+ */
+ public function process(XHPASTNode $root) {
+ $unaries = $root->selectDescendantsOfType('n_UNARY_PREFIX_EXPRESSION');
+
+ foreach ($unaries as $unary) {
+ $operator = $unary->getChildByIndex(0)->getConcreteString();
+
+ if (strtolower($operator) === 'exit') {
+ if ($unary->getParentNode()->getTypeName() !== 'n_STATEMENT') {
+ $this->raiseLintAtNode(
+ $unary,
+ pht('Use %s as a statement, not an expression.', 'exit'));
+ }
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistExtractUsageXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistExtractUsageXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistExtractUsageXHPASTLinterRule.php
@@ -0,0 +1,28 @@
+<?php
+
+final class ArcanistExtractUsageXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 4;
+
+ public function getLintName() {
+ return pht('Use of %s', 'extract()');
+ }
+
+ public function process(XHPASTNode $root) {
+ $calls = $root->selectDescendantsOfType('n_FUNCTION_CALL');
+
+ foreach ($calls as $call) {
+ $name = $call->getChildByIndex(0)->getConcreteString();
+
+ if (strtolower($name) === 'extract') {
+ $this->raiseLintAtNode(
+ $call,
+ pht(
+ 'Avoid %s. It is confusing and hinders static analysis.',
+ 'extract()'));
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistImplicitConstructorXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistImplicitConstructorXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistImplicitConstructorXHPASTLinterRule.php
@@ -0,0 +1,35 @@
+<?php
+
+final class ArcanistImplicitConstructorXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 10;
+
+ public function getLintName() {
+ return pht('Implicit Constructor');
+ }
+
+ public function process(XHPASTNode $root) {
+ $classes = $root->selectDescendantsOfType('n_CLASS_DECLARATION');
+
+ foreach ($classes as $class) {
+ $class_name = $class->getChildByIndex(1)->getConcreteString();
+ $methods = $class->selectDescendantsOfType('n_METHOD_DECLARATION');
+
+ foreach ($methods as $method) {
+ $method_name_token = $method->getChildByIndex(2);
+ $method_name = $method_name_token->getConcreteString();
+
+ if (strtolower($class_name) === strtolower($method_name)) {
+ $this->raiseLintAtNode(
+ $method_name_token,
+ pht(
+ 'Name constructors %s explicitly. This method is a constructor '.
+ 'because it has the same name as the class it is defined in.',
+ '__construct()'));
+ }
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistImplicitFallthroughXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistImplicitFallthroughXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistImplicitFallthroughXHPASTLinterRule.php
@@ -0,0 +1,208 @@
+<?php
+
+final class ArcanistImplicitFallthroughXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 30;
+
+ private $switchhook;
+
+ public function getLintName() {
+ return pht('Implicit Fallthrough');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ public function getLinterConfigurationOptions() {
+ return parent::getLinterConfigurationOptions() + array(
+ 'xhpast.switchhook' => array(
+ 'type' => 'optional string',
+ 'help' => pht(
+ 'Name of a concrete subclass of %s which tunes the '.
+ 'analysis of %s statements for this linter.',
+ 'ArcanistXHPASTLintSwitchHook',
+ 'switch()'),
+ ),
+ );
+ }
+
+ public function setLinterConfigurationValue($key, $value) {
+ switch ($key) {
+ case 'xhpast.switchhook':
+ $this->switchhook = $value;
+ return;
+
+ default:
+ return parent::setLinterConfigurationValue($key, $value);
+ }
+ }
+
+ public function process(XHPASTNode $root) {
+ $hook_obj = null;
+ $working_copy = $this->getEngine()->getWorkingCopy();
+ if ($working_copy) {
+ $hook_class = $this->switchhook;
+ if ($hook_class) {
+ $hook_obj = newv($hook_class, array());
+ assert_instances_of(array($hook_obj), 'ArcanistXHPASTLintSwitchHook');
+ }
+ }
+
+ $switches = $root->selectDescendantsOfType('n_SWITCH');
+ foreach ($switches as $switch) {
+ $blocks = array();
+
+ $cases = $switch->selectDescendantsOfType('n_CASE');
+ foreach ($cases as $case) {
+ $blocks[] = $case;
+ }
+
+ $defaults = $switch->selectDescendantsOfType('n_DEFAULT');
+ foreach ($defaults as $default) {
+ $blocks[] = $default;
+ }
+
+
+ foreach ($blocks as $key => $block) {
+ // Collect all the tokens in this block which aren't at top level.
+ // We want to ignore `break`, and `continue` in these blocks.
+ $lower_level = $block->selectDescendantsOfType('n_WHILE');
+ $lower_level->add($block->selectDescendantsOfType('n_DO_WHILE'));
+ $lower_level->add($block->selectDescendantsOfType('n_FOR'));
+ $lower_level->add($block->selectDescendantsOfType('n_FOREACH'));
+ $lower_level->add($block->selectDescendantsOfType('n_SWITCH'));
+ $lower_level_tokens = array();
+ foreach ($lower_level as $lower_level_block) {
+ $lower_level_tokens += $lower_level_block->getTokens();
+ }
+
+ // Collect all the tokens in this block which aren't in this scope
+ // (because they're inside class, function or interface declarations).
+ // We want to ignore all of these tokens.
+ $decls = $block->selectDescendantsOfType('n_FUNCTION_DECLARATION');
+ $decls->add($block->selectDescendantsOfType('n_CLASS_DECLARATION'));
+ // For completeness; these can't actually have anything.
+ $decls->add($block->selectDescendantsOfType('n_INTERFACE_DECLARATION'));
+ $different_scope_tokens = array();
+ foreach ($decls as $decl) {
+ $different_scope_tokens += $decl->getTokens();
+ }
+
+ $lower_level_tokens += $different_scope_tokens;
+
+ // Get all the trailing nonsemantic tokens, since we need to look for
+ // "fallthrough" comments past the end of the semantic block.
+
+ $tokens = $block->getTokens();
+ $last = end($tokens);
+ while ($last && $last = $last->getNextToken()) {
+ if ($last->isSemantic()) {
+ break;
+ }
+ $tokens[$last->getTokenID()] = $last;
+ }
+
+ $blocks[$key] = array(
+ $tokens,
+ $lower_level_tokens,
+ $different_scope_tokens,
+ );
+ }
+
+ foreach ($blocks as $token_lists) {
+ list(
+ $tokens,
+ $lower_level_tokens,
+ $different_scope_tokens) = $token_lists;
+
+ // Test each block (case or default statement) to see if it's OK. It's
+ // OK if:
+ //
+ // - it is empty; or
+ // - it ends in `break`, `return`, `throw`, `continue` or `exit` at
+ // top level; or
+ // - it has a comment with "fallthrough" in its text.
+
+ // Empty blocks are OK, so we start this at `true` and only set it to
+ // `false` if we find a statement.
+ $block_ok = true;
+
+ // Keeps track of whether the current statement is one that validates
+ // the block (`break`, `return`, `throw`, `continue`) or something else.
+ $statement_ok = false;
+
+ foreach ($tokens as $token_id => $token) {
+ if (!$token->isSemantic()) {
+ // Liberally match "fall" in the comment text so that comments like
+ // "fallthru", "fall through", "fallthrough", etc., are accepted.
+ if (preg_match('/fall/i', $token->getValue())) {
+ $block_ok = true;
+ break;
+ }
+ continue;
+ }
+
+ $tok_type = $token->getTypeName();
+
+ if ($tok_type === 'T_FUNCTION' ||
+ $tok_type === 'T_CLASS' ||
+ $tok_type === 'T_INTERFACE') {
+ // These aren't statements, but mark the block as nonempty anyway.
+ $block_ok = false;
+ continue;
+ }
+
+ if ($tok_type === ';') {
+ if ($statement_ok) {
+ $statment_ok = false;
+ } else {
+ $block_ok = false;
+ }
+ continue;
+ }
+
+ if ($tok_type === 'T_BREAK' ||
+ $tok_type === 'T_CONTINUE') {
+ if (empty($lower_level_tokens[$token_id])) {
+ $statement_ok = true;
+ $block_ok = true;
+ }
+ continue;
+ }
+
+ if ($tok_type === 'T_RETURN' ||
+ $tok_type === 'T_THROW' ||
+ $tok_type === 'T_EXIT' ||
+ ($hook_obj && $hook_obj->checkSwitchToken($token))) {
+ if (empty($different_scope_tokens[$token_id])) {
+ $statement_ok = true;
+ $block_ok = true;
+ }
+ continue;
+ }
+ }
+
+ if (!$block_ok) {
+ $this->raiseLintAtToken(
+ head($tokens),
+ pht(
+ 'This `%s` or `%s` has a nonempty block which does not end '.
+ 'with `%s`, `%s`, `%s`, `%s` or `%s`. Did you forget to add '.
+ 'one of those? If you intend to fall through, add a `%s` '.
+ 'comment to silence this warning.',
+ 'case',
+ 'default',
+ 'break',
+ 'continue',
+ 'return',
+ 'throw',
+ 'exit',
+ '// fallthrough'));
+ }
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistImplicitVisibilityXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistImplicitVisibilityXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistImplicitVisibilityXHPASTLinterRule.php
@@ -0,0 +1,88 @@
+<?php
+
+final class ArcanistImplicitVisibilityXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 52;
+
+ public function getLintName() {
+ return pht('Implicit Method Visibility');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_ADVICE;
+ }
+
+ public function process(XHPASTNode $root) {
+ $this->lintMethodModifier($root);
+ $this->lintPropertyModifier($root);
+ }
+
+ private function lintMethodModifier(XHPASTNode $root) {
+ static $visibilities = array(
+ 'public',
+ 'protected',
+ 'private',
+ );
+
+ $methods = $root->selectDescendantsOfType('n_METHOD_DECLARATION');
+
+ foreach ($methods as $method) {
+ $modifiers_list = $method->getChildOfType(0, 'n_METHOD_MODIFIER_LIST');
+
+ foreach ($modifiers_list->getChildren() as $modifier) {
+ if (in_array($modifier->getConcreteString(), $visibilities)) {
+ continue 2;
+ }
+ }
+
+ if ($modifiers_list->getChildren()) {
+ $node = $modifiers_list;
+ } else {
+ $node = $method;
+ }
+
+ $this->raiseLintAtNode(
+ $node,
+ pht('Methods should have their visibility declared explicitly.'),
+ 'public '.$node->getConcreteString());
+ }
+ }
+
+ private function lintPropertyModifier(XHPASTNode $root) {
+ static $visibilities = array(
+ 'public',
+ 'protected',
+ 'private',
+ );
+
+ $nodes = $root->selectDescendantsOfType('n_CLASS_MEMBER_MODIFIER_LIST');
+
+ foreach ($nodes as $node) {
+ $modifiers = $node->getChildren();
+
+ foreach ($modifiers as $modifier) {
+ if ($modifier->getConcreteString() == 'var') {
+ $this->raiseLintAtNode(
+ $modifier,
+ pht(
+ 'Use `%s` instead of `%s` to indicate public visibility.',
+ 'public',
+ 'var'),
+ 'public');
+ continue 2;
+ }
+
+ if (in_array($modifier->getConcreteString(), $visibilities)) {
+ continue 2;
+ }
+ }
+
+ $this->raiseLintAtNode(
+ $node,
+ pht('Properties should have their visibility declared explicitly.'),
+ 'public '.$node->getConcreteString());
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistKeywordCasingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistKeywordCasingXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistKeywordCasingXHPASTLinterRule.php
@@ -0,0 +1,79 @@
+<?php
+
+final class ArcanistKeywordCasingXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 40;
+
+ public function getLintName() {
+ return pht('Keyword Conventions');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ public function process(XHPASTNode $root) {
+ $keywords = array();
+
+ $symbols = $root->selectDescendantsOfType('n_SYMBOL_NAME');
+ foreach ($symbols as $symbol) {
+ $keywords[] = head($symbol->getTokens());
+ }
+
+ $arrays = $root->selectDescendantsOfType('n_ARRAY_LITERAL');
+ foreach ($arrays as $array) {
+ $keywords[] = head($array->getTokens());
+ }
+
+ $typehints = $root->selectDescendantsOfType('n_TYPE_NAME');
+ foreach ($typehints as $typehint) {
+ $keywords[] = head($typehint->getTokens());
+ }
+
+ $new_invocations = $root->selectDescendantsOfType('n_NEW');
+ foreach ($new_invocations as $invocation) {
+ $keywords[] = head($invocation->getTokens());
+ }
+
+ $class_declarations = $root->selectDescendantsOfType('n_CLASS_DECLARATION');
+ foreach ($class_declarations as $declaration) {
+ $keywords[] = head($declaration->getTokens());
+ }
+
+ // NOTE: Although PHP generally allows arbitrary casing for all language
+ // keywords, it's exceedingly rare for anyone to type, e.g., "CLASS" or
+ // "cLaSs" in the wild. This list just attempts to cover unconventional
+ // spellings which see some level of use, not all keywords exhaustively.
+ // There is no token or node type which spans all keywords, so this is
+ // significantly simpler.
+
+ static $keyword_map = array(
+ 'true' => 'true',
+ 'false' => 'false',
+ 'null' => 'null',
+ 'array' => 'array',
+ 'new' => 'new',
+ 'class' => 'class',
+ );
+
+ foreach ($keywords as $keyword) {
+ $value = $keyword->getValue();
+ $value_key = strtolower($value);
+ if (!isset($keyword_map[$value_key])) {
+ continue;
+ }
+ $expected_spelling = $keyword_map[$value_key];
+ if ($value !== $expected_spelling) {
+ $this->raiseLintAtToken(
+ $keyword,
+ pht(
+ 'Convention: spell keyword `%s` as `%s`.',
+ $value,
+ $expected_spelling),
+ $expected_spelling);
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistLanguageConstructParenthesesXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistLanguageConstructParenthesesXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistLanguageConstructParenthesesXHPASTLinterRule.php
@@ -0,0 +1,45 @@
+<?php
+
+final class ArcanistLanguageConstructParenthesesXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 46;
+
+ public function getLintName() {
+ return pht('Language Construct Parentheses');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ public function process(XHPASTNode $root) {
+ $nodes = $root->selectDescendantsOfTypes(array(
+ 'n_INCLUDE_FILE',
+ 'n_ECHO_LIST',
+ ));
+
+ foreach ($nodes as $node) {
+ $child = head($node->getChildren());
+
+ if ($child->getTypeName() === 'n_PARENTHETICAL_EXPRESSION') {
+ list($before, $after) = $child->getSurroundingNonsemanticTokens();
+
+ $replace = preg_replace(
+ '/^\((.*)\)$/',
+ '$1',
+ $child->getConcreteString());
+
+ if (!$before) {
+ $replace = ' '.$replace;
+ }
+
+ $this->raiseLintAtNode(
+ $child,
+ pht('Language constructs do not require parentheses.'),
+ $replace);
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistNamingConventionXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistNamingConventionXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistNamingConventionXHPASTLinterRule.php
@@ -0,0 +1,305 @@
+<?php
+
+final class ArcanistNamingConventionXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 9;
+
+ private $naminghook;
+
+ public function getLintName() {
+ return pht('Naming Conventions');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ public function getLinterConfigurationOptions() {
+ return parent::getLinterConfigurationOptions() + array(
+ 'xhpast.naminghook' => array(
+ 'type' => 'optional string',
+ 'help' => pht(
+ 'Name of a concrete subclass of %s which enforces more '.
+ 'granular naming convention rules for symbols.',
+ 'ArcanistXHPASTLintNamingHook'),
+ ),
+ );
+ }
+
+ public function setLinterConfigurationValue($key, $value) {
+ switch ($key) {
+ case 'xhpast.naminghook':
+ $this->naminghook = $value;
+ return;
+
+ default:
+ return parent::setLinterConfigurationValue($key, $value);
+ }
+ }
+
+ public function process(XHPASTNode $root) {
+ // We're going to build up a list of <type, name, token, error> tuples
+ // and then try to instantiate a hook class which has the opportunity to
+ // override us.
+ $names = array();
+
+ $classes = $root->selectDescendantsOfType('n_CLASS_DECLARATION');
+ foreach ($classes as $class) {
+ $name_token = $class->getChildByIndex(1);
+ $name_string = $name_token->getConcreteString();
+
+ $names[] = array(
+ 'class',
+ $name_string,
+ $name_token,
+ ArcanistXHPASTLintNamingHook::isUpperCamelCase($name_string)
+ ? null
+ : pht(
+ 'Follow naming conventions: classes should be named using '.
+ 'UpperCamelCase.'),
+ );
+ }
+
+ $ifaces = $root->selectDescendantsOfType('n_INTERFACE_DECLARATION');
+ foreach ($ifaces as $iface) {
+ $name_token = $iface->getChildByIndex(1);
+ $name_string = $name_token->getConcreteString();
+ $names[] = array(
+ 'interface',
+ $name_string,
+ $name_token,
+ ArcanistXHPASTLintNamingHook::isUpperCamelCase($name_string)
+ ? null
+ : pht(
+ 'Follow naming conventions: interfaces should be named using '.
+ 'UpperCamelCase.'),
+ );
+ }
+
+
+ $functions = $root->selectDescendantsOfType('n_FUNCTION_DECLARATION');
+ foreach ($functions as $function) {
+ $name_token = $function->getChildByIndex(2);
+ if ($name_token->getTypeName() === 'n_EMPTY') {
+ // Unnamed closure.
+ continue;
+ }
+ $name_string = $name_token->getConcreteString();
+ $names[] = array(
+ 'function',
+ $name_string,
+ $name_token,
+ ArcanistXHPASTLintNamingHook::isLowercaseWithUnderscores(
+ ArcanistXHPASTLintNamingHook::stripPHPFunction($name_string))
+ ? null
+ : pht(
+ 'Follow naming conventions: functions should be named using '.
+ 'lowercase_with_underscores.'),
+ );
+ }
+
+
+ $methods = $root->selectDescendantsOfType('n_METHOD_DECLARATION');
+ foreach ($methods as $method) {
+ $name_token = $method->getChildByIndex(2);
+ $name_string = $name_token->getConcreteString();
+ $names[] = array(
+ 'method',
+ $name_string,
+ $name_token,
+ ArcanistXHPASTLintNamingHook::isLowerCamelCase(
+ ArcanistXHPASTLintNamingHook::stripPHPFunction($name_string))
+ ? null
+ : pht('
+ Follow naming conventions: methods should be named using '.
+ 'lowerCamelCase.'),
+ );
+ }
+
+ $param_tokens = array();
+
+ $params = $root->selectDescendantsOfType('n_DECLARATION_PARAMETER_LIST');
+ foreach ($params as $param_list) {
+ foreach ($param_list->getChildren() as $param) {
+ $name_token = $param->getChildByIndex(1);
+ if ($name_token->getTypeName() === 'n_VARIABLE_REFERENCE') {
+ $name_token = $name_token->getChildOfType(0, 'n_VARIABLE');
+ }
+ $param_tokens[$name_token->getID()] = true;
+ $name_string = $name_token->getConcreteString();
+
+ $names[] = array(
+ 'parameter',
+ $name_string,
+ $name_token,
+ ArcanistXHPASTLintNamingHook::isLowercaseWithUnderscores(
+ ArcanistXHPASTLintNamingHook::stripPHPVariable($name_string))
+ ? null
+ : pht(
+ 'Follow naming conventions: parameters should be named using '.
+ 'lowercase_with_underscores.'),
+ );
+ }
+ }
+
+
+ $constants = $root->selectDescendantsOfType(
+ 'n_CLASS_CONSTANT_DECLARATION_LIST');
+ foreach ($constants as $constant_list) {
+ foreach ($constant_list->getChildren() as $constant) {
+ $name_token = $constant->getChildByIndex(0);
+ $name_string = $name_token->getConcreteString();
+ $names[] = array(
+ 'constant',
+ $name_string,
+ $name_token,
+ ArcanistXHPASTLintNamingHook::isUppercaseWithUnderscores($name_string)
+ ? null
+ : pht(
+ 'Follow naming conventions: class constants should be named '.
+ 'using UPPERCASE_WITH_UNDERSCORES.'),
+ );
+ }
+ }
+
+ $member_tokens = array();
+
+ $props = $root->selectDescendantsOfType('n_CLASS_MEMBER_DECLARATION_LIST');
+ foreach ($props as $prop_list) {
+ foreach ($prop_list->getChildren() as $token_id => $prop) {
+ if ($prop->getTypeName() === 'n_CLASS_MEMBER_MODIFIER_LIST') {
+ continue;
+ }
+
+ $name_token = $prop->getChildByIndex(0);
+ $member_tokens[$name_token->getID()] = true;
+
+ $name_string = $name_token->getConcreteString();
+ $names[] = array(
+ 'member',
+ $name_string,
+ $name_token,
+ ArcanistXHPASTLintNamingHook::isLowerCamelCase(
+ ArcanistXHPASTLintNamingHook::stripPHPVariable($name_string))
+ ? null
+ : pht(
+ 'Follow naming conventions: class properties should be named '.
+ 'using lowerCamelCase.'),
+ );
+ }
+ }
+
+ $superglobal_map = array_fill_keys(
+ $this->getSuperGlobalNames(),
+ true);
+
+
+ $fdefs = $root->selectDescendantsOfType('n_FUNCTION_DECLARATION');
+ $mdefs = $root->selectDescendantsOfType('n_METHOD_DECLARATION');
+ $defs = $fdefs->add($mdefs);
+
+ foreach ($defs as $def) {
+ $globals = $def->selectDescendantsOfType('n_GLOBAL_DECLARATION_LIST');
+ $globals = $globals->selectDescendantsOfType('n_VARIABLE');
+
+ $globals_map = array();
+ foreach ($globals as $global) {
+ $global_string = $global->getConcreteString();
+ $globals_map[$global_string] = true;
+ $names[] = array(
+ 'user',
+ $global_string,
+ $global,
+
+ // No advice for globals, but hooks have an option to provide some.
+ null,
+ );
+ }
+
+ // Exclude access of static properties, since lint will be raised at
+ // their declaration if they're invalid and they may not conform to
+ // variable rules. This is slightly overbroad (includes the entire
+ // rhs of a `Class::...` token) to cover cases like `Class:$x[0]`. These
+ // variables are simply made exempt from naming conventions.
+ $exclude_tokens = array();
+ $statics = $def->selectDescendantsOfType('n_CLASS_STATIC_ACCESS');
+ foreach ($statics as $static) {
+ $rhs = $static->getChildByIndex(1);
+ if ($rhs->getTypeName() == 'n_VARIABLE') {
+ $exclude_tokens[$rhs->getID()] = true;
+ } else {
+ $rhs_vars = $rhs->selectDescendantsOfType('n_VARIABLE');
+ foreach ($rhs_vars as $var) {
+ $exclude_tokens[$var->getID()] = true;
+ }
+ }
+ }
+
+ $vars = $def->selectDescendantsOfType('n_VARIABLE');
+ foreach ($vars as $token_id => $var) {
+ if (isset($member_tokens[$token_id])) {
+ continue;
+ }
+ if (isset($param_tokens[$token_id])) {
+ continue;
+ }
+ if (isset($exclude_tokens[$token_id])) {
+ continue;
+ }
+
+ $var_string = $var->getConcreteString();
+
+ // Awkward artifact of `$o->{$x}`.
+ $var_string = trim($var_string, '{}');
+
+ if (isset($superglobal_map[$var_string])) {
+ continue;
+ }
+ if (isset($globals_map[$var_string])) {
+ continue;
+ }
+
+ $names[] = array(
+ 'variable',
+ $var_string,
+ $var,
+ ArcanistXHPASTLintNamingHook::isLowercaseWithUnderscores(
+ ArcanistXHPASTLintNamingHook::stripPHPVariable($var_string))
+ ? null
+ : pht(
+ 'Follow naming conventions: variables should be named using '.
+ 'lowercase_with_underscores.'),
+ );
+ }
+ }
+
+ $engine = $this->getEngine();
+ $working_copy = $engine->getWorkingCopy();
+
+ if ($working_copy) {
+ // If a naming hook is configured, give it a chance to override the
+ // default results for all the symbol names.
+ $hook_class = $this->naminghook
+ ? $this->naminghook
+ : $working_copy->getProjectConfig('lint.xhpast.naminghook');
+ if ($hook_class) {
+ $hook_obj = newv($hook_class, array());
+ foreach ($names as $k => $name_attrs) {
+ list($type, $name, $token, $default) = $name_attrs;
+ $result = $hook_obj->lintSymbolName($type, $name, $default);
+ $names[$k][3] = $result;
+ }
+ }
+ }
+
+ // Raise anything we're left with.
+ foreach ($names as $k => $name_attrs) {
+ list($type, $name, $token, $result) = $name_attrs;
+ if ($result) {
+ $this->raiseLintAtNode($token, $result);
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistPHPCloseTagXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistPHPCloseTagXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistPHPCloseTagXHPASTLinterRule.php
@@ -0,0 +1,22 @@
+<?php
+
+final class ArcanistPHPCloseTagXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 8;
+
+ public function getLintName() {
+ return pht('Use of Close Tag "%s"', '?>');
+ }
+
+ public function process(XHPASTNode $root) {
+ $tokens = $root->selectTokensOfType('T_CLOSE_TAG');
+
+ foreach ($tokens as $token) {
+ $this->raiseLintAtToken(
+ $token,
+ pht('Do not use the PHP closing tag, "%s".', '?>'));
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistPHPCompatibilityXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistPHPCompatibilityXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistPHPCompatibilityXHPASTLinterRule.php
@@ -0,0 +1,431 @@
+<?php
+
+final class ArcanistPHPCompatibilityXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 45;
+
+ private $version;
+ private $windowsVersion;
+
+ public function getLintName() {
+ return pht('PHP Compatibility');
+ }
+
+ public function getLinterConfigurationOptions() {
+ return parent::getLinterConfigurationOptions() + array(
+ 'xhpast.php-version' => array(
+ 'type' => 'optional string',
+ 'help' => pht('PHP version to target.'),
+ ),
+ 'xhpast.php-version.windows' => array(
+ 'type' => 'optional string',
+ 'help' => pht('PHP version to target on Windows.'),
+ ),
+ );
+ }
+
+ public function setLinterConfigurationValue($key, $value) {
+ switch ($key) {
+ case 'xhpast.php-version':
+ $this->version = $value;
+ return;
+
+ case 'xhpast.php-version.windows':
+ $this->windowsVersion = $value;
+ return;
+
+ default:
+ return parent::setLinterConfigurationValue($key, $value);
+ }
+ }
+
+ public function process(XHPASTNode $root) {
+ if (!$this->version) {
+ return;
+ }
+
+ $target = phutil_get_library_root('phutil').
+ '/../resources/php_compat_info.json';
+ $compat_info = phutil_json_decode(Filesystem::readFile($target));
+
+ // Create a whitelist for symbols which are being used conditionally.
+ $whitelist = array(
+ 'class' => array(),
+ 'function' => array(),
+ );
+
+ $conditionals = $root->selectDescendantsOfType('n_IF');
+ foreach ($conditionals as $conditional) {
+ $condition = $conditional->getChildOfType(0, 'n_CONTROL_CONDITION');
+ $function = $condition->getChildByIndex(0);
+
+ if ($function->getTypeName() != 'n_FUNCTION_CALL') {
+ continue;
+ }
+
+ $function_token = $function
+ ->getChildByIndex(0);
+
+ if ($function_token->getTypeName() != 'n_SYMBOL_NAME') {
+ // This may be `Class::method(...)` or `$var(...)`.
+ continue;
+ }
+
+ $function_name = $function_token->getConcreteString();
+
+ switch ($function_name) {
+ case 'class_exists':
+ case 'function_exists':
+ case 'interface_exists':
+ $type = null;
+ switch ($function_name) {
+ case 'class_exists':
+ $type = 'class';
+ break;
+
+ case 'function_exists':
+ $type = 'function';
+ break;
+
+ case 'interface_exists':
+ $type = 'interface';
+ break;
+ }
+
+ $params = $function->getChildOfType(1, 'n_CALL_PARAMETER_LIST');
+ $symbol = $params->getChildByIndex(0);
+
+ if (!$symbol->isStaticScalar()) {
+ continue;
+ }
+
+ $symbol_name = $symbol->evalStatic();
+ if (!idx($whitelist[$type], $symbol_name)) {
+ $whitelist[$type][$symbol_name] = array();
+ }
+
+ $span = $conditional
+ ->getChildByIndex(1)
+ ->getTokens();
+
+ $whitelist[$type][$symbol_name][] = range(
+ head_key($span),
+ last_key($span));
+ break;
+ }
+ }
+
+ $calls = $root->selectDescendantsOfType('n_FUNCTION_CALL');
+ foreach ($calls as $call) {
+ $node = $call->getChildByIndex(0);
+ $name = $node->getConcreteString();
+
+ $version = idx($compat_info['functions'], $name, array());
+ $min = idx($version, 'min');
+ $max = idx($version, 'max');
+
+ // Check if whitelisted.
+ $whitelisted = false;
+ foreach (idx($whitelist['function'], $name, array()) as $range) {
+ if (array_intersect($range, array_keys($node->getTokens()))) {
+ $whitelisted = true;
+ break;
+ }
+ }
+
+ if ($whitelisted) {
+ continue;
+ }
+
+ if ($min && version_compare($min, $this->version, '>')) {
+ $this->raiseLintAtNode(
+ $node,
+ pht(
+ 'This codebase targets PHP %s, but `%s()` was not '.
+ 'introduced until PHP %s.',
+ $this->version,
+ $name,
+ $min));
+ } else if ($max && version_compare($max, $this->version, '<')) {
+ $this->raiseLintAtNode(
+ $node,
+ pht(
+ 'This codebase targets PHP %s, but `%s()` was '.
+ 'removed in PHP %s.',
+ $this->version,
+ $name,
+ $max));
+ } else if (array_key_exists($name, $compat_info['params'])) {
+ $params = $call->getChildOfType(1, 'n_CALL_PARAMETER_LIST');
+ foreach (array_values($params->getChildren()) as $i => $param) {
+ $version = idx($compat_info['params'][$name], $i);
+ if ($version && version_compare($version, $this->version, '>')) {
+ $this->raiseLintAtNode(
+ $param,
+ pht(
+ 'This codebase targets PHP %s, but parameter %d '.
+ 'of `%s()` was not introduced until PHP %s.',
+ $this->version,
+ $i + 1,
+ $name,
+ $version));
+ }
+ }
+ }
+
+ if ($this->windowsVersion) {
+ $windows = idx($compat_info['functions_windows'], $name);
+
+ if ($windows === false) {
+ $this->raiseLintAtNode(
+ $node,
+ pht(
+ 'This codebase targets PHP %s on Windows, '.
+ 'but `%s()` is not available there.',
+ $this->windowsVersion,
+ $name));
+ } else if (version_compare($windows, $this->windowsVersion, '>')) {
+ $this->raiseLintAtNode(
+ $node,
+ pht(
+ 'This codebase targets PHP %s on Windows, '.
+ 'but `%s()` is not available there until PHP %s.',
+ $this->windowsVersion,
+ $name,
+ $windows));
+ }
+ }
+ }
+
+ $classes = $root->selectDescendantsOfType('n_CLASS_NAME');
+ foreach ($classes as $node) {
+ $name = $node->getConcreteString();
+ $version = idx($compat_info['interfaces'], $name, array());
+ $version = idx($compat_info['classes'], $name, $version);
+ $min = idx($version, 'min');
+ $max = idx($version, 'max');
+ // Check if whitelisted.
+ $whitelisted = false;
+ foreach (idx($whitelist['class'], $name, array()) as $range) {
+ if (array_intersect($range, array_keys($node->getTokens()))) {
+ $whitelisted = true;
+ break;
+ }
+ }
+
+ if ($whitelisted) {
+ continue;
+ }
+
+ if ($min && version_compare($min, $this->version, '>')) {
+ $this->raiseLintAtNode(
+ $node,
+ pht(
+ 'This codebase targets PHP %s, but `%s` was not '.
+ 'introduced until PHP %s.',
+ $this->version,
+ $name,
+ $min));
+ } else if ($max && version_compare($max, $this->version, '<')) {
+ $this->raiseLintAtNode(
+ $node,
+ pht(
+ 'This codebase targets PHP %s, but `%s` was '.
+ 'removed in PHP %s.',
+ $this->version,
+ $name,
+ $max));
+ }
+ }
+
+ // TODO: Technically, this will include function names. This is unlikely to
+ // cause any issues (unless, of course, there existed a function that had
+ // the same name as some constant).
+ $constants = $root->selectDescendantsOfTypes(array(
+ 'n_SYMBOL_NAME',
+ 'n_MAGIC_SCALAR',
+ ));
+ foreach ($constants as $node) {
+ $name = $node->getConcreteString();
+ $version = idx($compat_info['constants'], $name, array());
+ $min = idx($version, 'min');
+ $max = idx($version, 'max');
+
+ if ($min && version_compare($min, $this->version, '>')) {
+ $this->raiseLintAtNode(
+ $node,
+ pht(
+ 'This codebase targets PHP %s, but `%s` was not '.
+ 'introduced until PHP %s.',
+ $this->version,
+ $name,
+ $min));
+ } else if ($max && version_compare($max, $this->version, '<')) {
+ $this->raiseLintAtNode(
+ $node,
+ pht(
+ 'This codebase targets PHP %s, but `%s` was '.
+ 'removed in PHP %s.',
+ $this->version,
+ $name,
+ $max));
+ }
+ }
+
+ if (version_compare($this->version, '5.3.0') < 0) {
+ $this->lintPHP53Features($root);
+ } else {
+ $this->lintPHP53Incompatibilities($root);
+ }
+
+ if (version_compare($this->version, '5.4.0') < 0) {
+ $this->lintPHP54Features($root);
+ } else {
+ $this->lintPHP54Incompatibilities($root);
+ }
+ }
+
+ private function lintPHP53Features(XHPASTNode $root) {
+ $functions = $root->selectTokensOfType('T_FUNCTION');
+
+ foreach ($functions as $function) {
+ $next = $function->getNextToken();
+ while ($next) {
+ if ($next->isSemantic()) {
+ break;
+ }
+ $next = $next->getNextToken();
+ }
+
+ if ($next) {
+ if ($next->getTypeName() === '(') {
+ $this->raiseLintAtToken(
+ $function,
+ pht(
+ 'This codebase targets PHP %s, but anonymous functions '.
+ 'were not introduced until PHP 5.3.',
+ $this->version));
+ }
+ }
+ }
+
+ $namespaces = $root->selectTokensOfType('T_NAMESPACE');
+ foreach ($namespaces as $namespace) {
+ $this->raiseLintAtToken(
+ $namespace,
+ pht(
+ 'This codebase targets PHP %s, but namespaces were not '.
+ 'introduced until PHP 5.3.',
+ $this->version));
+ }
+
+ // NOTE: This is only `use x;`, in anonymous functions the node type is
+ // `n_LEXICAL_VARIABLE_LIST` even though both tokens are `T_USE`.
+
+ // TODO: We parse `n_USE` in a slightly crazy way right now; that would be
+ // a better selector once it's fixed.
+
+ $uses = $root->selectDescendantsOfType('n_USE_LIST');
+ foreach ($uses as $use) {
+ $this->raiseLintAtNode(
+ $use,
+ pht(
+ 'This codebase targets PHP %s, but namespaces were not '.
+ 'introduced until PHP 5.3.',
+ $this->version));
+ }
+
+ $statics = $root->selectDescendantsOfType('n_CLASS_STATIC_ACCESS');
+ foreach ($statics as $static) {
+ $name = $static->getChildByIndex(0);
+ if ($name->getTypeName() != 'n_CLASS_NAME') {
+ continue;
+ }
+ if ($name->getConcreteString() === 'static') {
+ $this->raiseLintAtNode(
+ $name,
+ pht(
+ 'This codebase targets PHP %s, but `%s` was not '.
+ 'introduced until PHP 5.3.',
+ $this->version,
+ 'static::'));
+ }
+ }
+
+ $ternaries = $root->selectDescendantsOfType('n_TERNARY_EXPRESSION');
+ foreach ($ternaries as $ternary) {
+ $yes = $ternary->getChildByIndex(1);
+ if ($yes->getTypeName() === 'n_EMPTY') {
+ $this->raiseLintAtNode(
+ $ternary,
+ pht(
+ 'This codebase targets PHP %s, but short ternary was '.
+ 'not introduced until PHP 5.3.',
+ $this->version));
+ }
+ }
+
+ $heredocs = $root->selectDescendantsOfType('n_HEREDOC');
+ foreach ($heredocs as $heredoc) {
+ if (preg_match('/^<<<[\'"]/', $heredoc->getConcreteString())) {
+ $this->raiseLintAtNode(
+ $heredoc,
+ pht(
+ 'This codebase targets PHP %s, but nowdoc was not '.
+ 'introduced until PHP 5.3.',
+ $this->version));
+ }
+ }
+ }
+
+ private function lintPHP53Incompatibilities(XHPASTNode $root) {}
+
+ private function lintPHP54Features(XHPASTNode $root) {
+ $indexes = $root->selectDescendantsOfType('n_INDEX_ACCESS');
+
+ foreach ($indexes as $index) {
+ switch ($index->getChildByIndex(0)->getTypeName()) {
+ case 'n_FUNCTION_CALL':
+ case 'n_METHOD_CALL':
+ $this->raiseLintAtNode(
+ $index->getChildByIndex(1),
+ pht(
+ 'The `%s` syntax was not introduced until PHP 5.4, but this '.
+ 'codebase targets an earlier version of PHP. You can rewrite '.
+ 'this expression using `%s`.',
+ 'f()[...]',
+ 'idx()'));
+ break;
+ }
+ }
+ }
+
+ private function lintPHP54Incompatibilities(XHPASTNode $root) {
+ $breaks = $root->selectDescendantsOfTypes(array('n_BREAK', 'n_CONTINUE'));
+ foreach ($breaks as $break) {
+ $arg = $break->getChildByIndex(0);
+
+ switch ($arg->getTypeName()) {
+ case 'n_EMPTY':
+ break;
+
+ case 'n_NUMERIC_SCALAR':
+ if ($arg->getConcreteString() != '0') {
+ break;
+ }
+
+ default:
+ $this->raiseLintAtNode(
+ $break->getChildByIndex(0),
+ pht(
+ 'The `%s` and `%s` statements no longer accept '.
+ 'variable arguments.',
+ 'break',
+ 'continue'));
+ break;
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistPHPEchoTagXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistPHPEchoTagXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistPHPEchoTagXHPASTLinterRule.php
@@ -0,0 +1,24 @@
+<?php
+
+final class ArcanistPHPEchoTagXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 7;
+
+ public function getLintName() {
+ return pht('Use of Echo Tag "%s"', '<?=');
+ }
+
+ public function process(XHPASTNode $root) {
+ $tokens = $root->selectTokensOfType('T_OPEN_TAG_WITH_ECHO');
+
+ foreach ($tokens as $token) {
+ $this->raiseLintAtToken(
+ $token,
+ pht(
+ 'Avoid the PHP echo short form, "%s".',
+ '<?='));
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistPHPOpenTagXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistPHPOpenTagXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistPHPOpenTagXHPASTLinterRule.php
@@ -0,0 +1,35 @@
+<?php
+
+final class ArcanistPHPOpenTagXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 15;
+
+ public function getLintName() {
+ return pht('Expected Open Tag');
+ }
+
+ public function process(XHPASTNode $root) {
+ $tokens = $root->getTokens();
+
+ foreach ($tokens as $token) {
+ if ($token->getTypeName() === 'T_OPEN_TAG') {
+ break;
+ } else if ($token->getTypeName() === 'T_OPEN_TAG_WITH_ECHO') {
+ break;
+ } else {
+ if (!preg_match('/^#!/', $token->getValue())) {
+ $this->raiseLintAtToken(
+ $token,
+ pht(
+ 'PHP files should start with "%s", which may be preceded by '.
+ 'a "%s" line for scripts.',
+ '<?php',
+ '#!'));
+ }
+ break;
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistPHPShortTagXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistPHPShortTagXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistPHPShortTagXHPASTLinterRule.php
@@ -0,0 +1,25 @@
+<?php
+
+final class ArcanistPHPShortTagXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 6;
+
+ public function getLintName() {
+ return pht('Use of Short Tag "%s"', '<?');
+ }
+
+ public function process(XHPASTNode $root) {
+ $tokens = $root->selectTokensOfType('T_OPEN_TAG');
+
+ foreach ($tokens as $token) {
+ if (trim($token->getValue()) === '<?') {
+ $this->raiseLintAtToken(
+ $token,
+ pht('Use the full form of the PHP open tag, "%s".', '<?php'),
+ "<?php\n");
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistParenthesesSpacingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistParenthesesSpacingXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistParenthesesSpacingXHPASTLinterRule.php
@@ -0,0 +1,69 @@
+<?php
+
+final class ArcanistParenthesesSpacingXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 25;
+
+ public function getLintName() {
+ return pht('Spaces Inside Parentheses');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ public function process(XHPASTNode $root) {
+ $all_paren_groups = $root->selectDescendantsOfTypes(array(
+ 'n_CALL_PARAMETER_LIST',
+ 'n_CONTROL_CONDITION',
+ 'n_FOR_EXPRESSION',
+ 'n_FOREACH_EXPRESSION',
+ 'n_DECLARATION_PARAMETER_LIST',
+ ));
+
+ foreach ($all_paren_groups as $group) {
+ $tokens = $group->getTokens();
+
+ $token_o = array_shift($tokens);
+ $token_c = array_pop($tokens);
+ if ($token_o->getTypeName() !== '(') {
+ throw new Exception(pht('Expected opening parentheses!'));
+ }
+ if ($token_c->getTypeName() !== ')') {
+ throw new Exception(pht('Expected closing parentheses!'));
+ }
+
+ $nonsem_o = $token_o->getNonsemanticTokensAfter();
+ $nonsem_c = $token_c->getNonsemanticTokensBefore();
+
+ if (!$nonsem_o) {
+ continue;
+ }
+
+ $raise = array();
+
+ $string_o = implode('', mpull($nonsem_o, 'getValue'));
+ if (preg_match('/^[ ]+$/', $string_o)) {
+ $raise[] = array($nonsem_o, $string_o);
+ }
+
+ if ($nonsem_o !== $nonsem_c) {
+ $string_c = implode('', mpull($nonsem_c, 'getValue'));
+ if (preg_match('/^[ ]+$/', $string_c)) {
+ $raise[] = array($nonsem_c, $string_c);
+ }
+ }
+
+ foreach ($raise as $warning) {
+ list($tokens, $string) = $warning;
+ $this->raiseLintAtOffset(
+ reset($tokens)->getOffset(),
+ pht('Parentheses should hug their contents.'),
+ $string,
+ '');
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistPlusOperatorOnStringsXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistPlusOperatorOnStringsXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistPlusOperatorOnStringsXHPASTLinterRule.php
@@ -0,0 +1,37 @@
+<?php
+
+final class ArcanistPlusOperatorOnStringsXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 21;
+
+ public function getLintName() {
+ return pht('Not String Concatenation');
+ }
+
+ public function process(XHPASTNode $root) {
+ $binops = $root->selectDescendantsOfType('n_BINARY_EXPRESSION');
+
+ foreach ($binops as $binop) {
+ $op = $binop->getChildByIndex(1);
+ if ($op->getConcreteString() !== '+') {
+ continue;
+ }
+
+ $left = $binop->getChildByIndex(0);
+ $right = $binop->getChildByIndex(2);
+ if ($left->getTypeName() === 'n_STRING_SCALAR' ||
+ $right->getTypeName() === 'n_STRING_SCALAR') {
+ $this->raiseLintAtNode(
+ $binop,
+ pht(
+ 'In PHP, `%s` is the string concatenation operator, not `+`. '.
+ 'This expression uses `+` with a string literal as an operand.',
+ '.',
+ '+',
+ '+'));
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistPregQuoteMisuseXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistPregQuoteMisuseXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistPregQuoteMisuseXHPASTLinterRule.php
@@ -0,0 +1,47 @@
+<?php
+
+final class ArcanistPregQuoteMisuseXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 14;
+
+ public function getLintName() {
+ return pht('Misuse of %s', 'preg_quote()');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_ADVICE;
+ }
+
+ /**
+ * `preg_quote()` takes two arguments, but the second one is optional because
+ * it is possible to use `()`, `[]` or `{}` as regular expression delimiters.
+ * If you don't pass a second argument, you're probably going to get
+ * something wrong.
+ */
+ public function process(XHPASTNode $root) {
+ $function_calls = $root->selectDescendantsOfType('n_FUNCTION_CALL');
+
+ foreach ($function_calls as $call) {
+ $name = $call->getChildByIndex(0)->getConcreteString();
+
+ if (strtolower($name) === 'preg_quote') {
+ $parameter_list = $call->getChildOfType(1, 'n_CALL_PARAMETER_LIST');
+
+ if (count($parameter_list->getChildren()) !== 2) {
+ $this->raiseLintAtNode(
+ $call,
+ pht(
+ 'If you use pattern delimiters that require escaping '.
+ '(such as %s, but not %s) then you should pass two '.
+ 'arguments to %s, so that %s knows which delimiter to escape.',
+ '//',
+ '()',
+ 'preg_quote()',
+ 'preg_quote()'));
+ }
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistReusedIteratorReferenceXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistReusedIteratorReferenceXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistReusedIteratorReferenceXHPASTLinterRule.php
@@ -0,0 +1,184 @@
+<?php
+
+final class ArcanistReusedIteratorReferenceXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 39;
+
+ public function getLintName() {
+ return pht('Reuse of Iterator References');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ /**
+ * Find cases where a `foreach` loop is being iterated using a variable
+ * reference and the same variable is used outside of the loop without
+ * calling `unset()` or reassigning the variable to another variable
+ * reference.
+ *
+ * COUNTEREXAMPLE
+ * foreach ($ar as &$a) {
+ * // ...
+ * }
+ * $a = 1; // <-- Raises an error for using $a
+ *
+ */
+ public function process(XHPASTNode $root) {
+ $fdefs = $root->selectDescendantsOfType('n_FUNCTION_DECLARATION');
+ $mdefs = $root->selectDescendantsOfType('n_METHOD_DECLARATION');
+ $defs = $fdefs->add($mdefs);
+
+ foreach ($defs as $def) {
+ $body = $def->getChildByIndex(5);
+ if ($body->getTypeName() === 'n_EMPTY') {
+ // Abstract method declaration.
+ continue;
+ }
+
+ $exclude = array();
+
+ // Exclude uses of variables, `unset`s, and `foreach` loops within
+ // closures - they are checked on their own.
+ $func_defs = $body->selectDescendantsOfType('n_FUNCTION_DECLARATION');
+ foreach ($func_defs as $func_def) {
+ $vars = $func_def->selectDescendantsOfType('n_VARIABLE');
+ foreach ($vars as $var) {
+ $exclude[$var->getID()] = true;
+ }
+
+ $unset_lists = $func_def->selectDescendantsOfType('n_UNSET_LIST');
+ foreach ($unset_lists as $unset_list) {
+ $exclude[$unset_list->getID()] = true;
+ }
+
+ $foreaches = $func_def->selectDescendantsOfType('n_FOREACH');
+ foreach ($foreaches as $foreach) {
+ $exclude[$foreach->getID()] = true;
+ }
+ }
+
+ // Find all variables that are unset within the scope.
+ $unset_vars = array();
+ $unset_lists = $body->selectDescendantsOfType('n_UNSET_LIST');
+ foreach ($unset_lists as $unset_list) {
+ if (isset($exclude[$unset_list->getID()])) {
+ continue;
+ }
+
+ $unset_list_vars = $unset_list->selectDescendantsOfType('n_VARIABLE');
+ foreach ($unset_list_vars as $var) {
+ $concrete = $this->getConcreteVariableString($var);
+ $unset_vars[$concrete][] = $var->getOffset();
+ $exclude[$var->getID()] = true;
+ }
+ }
+
+ // Find all reference variables in `foreach` expressions.
+ $reference_vars = array();
+ $foreaches = $body->selectDescendantsOfType('n_FOREACH');
+ foreach ($foreaches as $foreach) {
+ if (isset($exclude[$foreach->getID()])) {
+ continue;
+ }
+
+ $foreach_expr = $foreach->getChildOfType(0, 'n_FOREACH_EXPRESSION');
+ $var = $foreach_expr->getChildByIndex(2);
+ if ($var->getTypeName() !== 'n_VARIABLE_REFERENCE') {
+ continue;
+ }
+
+ $reference = $var->getChildByIndex(0);
+ if ($reference->getTypeName() !== 'n_VARIABLE') {
+ continue;
+ }
+
+ $reference_name = $this->getConcreteVariableString($reference);
+ $reference_vars[$reference_name][] = $reference->getOffset();
+ $exclude[$reference->getID()] = true;
+
+ // Exclude uses of the reference variable within the foreach loop
+ $foreach_vars = $foreach->selectDescendantsOfType('n_VARIABLE');
+ foreach ($foreach_vars as $var) {
+ $name = $this->getConcreteVariableString($var);
+ if ($name === $reference_name) {
+ $exclude[$var->getID()] = true;
+ }
+ }
+ }
+
+ // Allow usage if the reference variable is assigned to another
+ // reference variable.
+ $binary = $body->selectDescendantsOfType('n_BINARY_EXPRESSION');
+ foreach ($binary as $expr) {
+ if ($expr->getChildByIndex(1)->getConcreteString() !== '=') {
+ continue;
+ }
+ $lval = $expr->getChildByIndex(0);
+ if ($lval->getTypeName() !== 'n_VARIABLE') {
+ continue;
+ }
+ $rval = $expr->getChildByIndex(2);
+ if ($rval->getTypeName() !== 'n_VARIABLE_REFERENCE') {
+ continue;
+ }
+
+ // Counts as unsetting a variable.
+ $concrete = $this->getConcreteVariableString($lval);
+ $unset_vars[$concrete][] = $lval->getOffset();
+ $exclude[$lval->getID()] = true;
+ }
+
+ $all_vars = array();
+ $all = $body->selectDescendantsOfType('n_VARIABLE');
+ foreach ($all as $var) {
+ if (isset($exclude[$var->getID()])) {
+ continue;
+ }
+
+ $name = $this->getConcreteVariableString($var);
+
+ if (!isset($reference_vars[$name])) {
+ continue;
+ }
+
+ // Find the closest reference offset to this variable.
+ $reference_offset = null;
+ foreach ($reference_vars[$name] as $offset) {
+ if ($offset < $var->getOffset()) {
+ $reference_offset = $offset;
+ } else {
+ break;
+ }
+ }
+ if (!$reference_offset) {
+ continue;
+ }
+
+ // Check if an unset exists between reference and usage of this
+ // variable.
+ $warn = true;
+ if (isset($unset_vars[$name])) {
+ foreach ($unset_vars[$name] as $unset_offset) {
+ if ($unset_offset > $reference_offset &&
+ $unset_offset < $var->getOffset()) {
+ $warn = false;
+ break;
+ }
+ }
+ }
+ if ($warn) {
+ $this->raiseLintAtNode(
+ $var,
+ pht(
+ 'This variable was used already as a by-reference iterator '.
+ 'variable. Such variables survive outside the foreach loop, '.
+ 'do not reuse.'));
+ }
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistReusedIteratorsXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistReusedIteratorsXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistReusedIteratorsXHPASTLinterRule.php
@@ -0,0 +1,99 @@
+<?php
+
+final class ArcanistReusedIteratorsXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 23;
+
+ public function getLintName() {
+ return pht('Reuse of Iterator Variable');
+ }
+
+ /**
+ * Find cases where loops get nested inside each other but use the same
+ * iterator variable. For example:
+ *
+ * COUNTEREXAMPLE
+ * foreach ($list as $thing) {
+ * foreach ($stuff as $thing) { // <-- Raises an error for reuse of $thing
+ * // ...
+ * }
+ * }
+ *
+ */
+ public function process(XHPASTNode $root) {
+ $used_vars = array();
+
+ $for_loops = $root->selectDescendantsOfType('n_FOR');
+ foreach ($for_loops as $for_loop) {
+ $var_map = array();
+
+ // Find all the variables that are assigned to in the `for()` expression.
+ $for_expr = $for_loop->getChildOfType(0, 'n_FOR_EXPRESSION');
+ $bin_exprs = $for_expr->selectDescendantsOfType('n_BINARY_EXPRESSION');
+
+ foreach ($bin_exprs as $bin_expr) {
+ if ($bin_expr->getChildByIndex(1)->getConcreteString() === '=') {
+ $var = $bin_expr->getChildByIndex(0);
+ $var_map[$var->getConcreteString()] = $var;
+ }
+ }
+
+ $used_vars[$for_loop->getID()] = $var_map;
+ }
+
+ $foreach_loops = $root->selectDescendantsOfType('n_FOREACH');
+ foreach ($foreach_loops as $foreach_loop) {
+ $var_map = array();
+
+ $foreach_expr = $foreach_loop->getChildOftype(0, 'n_FOREACH_EXPRESSION');
+
+ // We might use one or two vars, i.e. `foreach ($x as $y => $z)` or
+ // `foreach ($x as $y)`.
+ $possible_used_vars = array(
+ $foreach_expr->getChildByIndex(1),
+ $foreach_expr->getChildByIndex(2),
+ );
+ foreach ($possible_used_vars as $var) {
+ if ($var->getTypeName() === 'n_EMPTY') {
+ continue;
+ }
+ $name = $var->getConcreteString();
+ $name = trim($name, '&'); // Get rid of ref silliness.
+ $var_map[$name] = $var;
+ }
+
+ $used_vars[$foreach_loop->getID()] = $var_map;
+ }
+
+ $all_loops = $for_loops->add($foreach_loops);
+ foreach ($all_loops as $loop) {
+ $child_for_loops = $loop->selectDescendantsOfType('n_FOR');
+ $child_foreach_loops = $loop->selectDescendantsOfType('n_FOREACH');
+ $child_loops = $child_for_loops->add($child_foreach_loops);
+
+ $outer_vars = $used_vars[$loop->getID()];
+ foreach ($child_loops as $inner_loop) {
+ $inner_vars = $used_vars[$inner_loop->getID()];
+ $shared = array_intersect_key($outer_vars, $inner_vars);
+ if ($shared) {
+ $shared_desc = implode(', ', array_keys($shared));
+ $message = $this->raiseLintAtNode(
+ $inner_loop->getChildByIndex(0),
+ pht(
+ 'This loop reuses iterator variables (%s) from an '.
+ 'outer loop. You might be clobbering the outer iterator. '.
+ 'Change the inner loop to use a different iterator name.',
+ $shared_desc));
+
+ $locations = array();
+ foreach ($shared as $var) {
+ $locations[] = $this->getOtherLocation($var->getOffset());
+ }
+ $message->setOtherLocations($locations);
+ }
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistSemicolonSpacingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistSemicolonSpacingXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistSemicolonSpacingXHPASTLinterRule.php
@@ -0,0 +1,31 @@
+<?php
+
+final class ArcanistSemicolonSpacingXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 43;
+
+ public function getLintName() {
+ return pht('Semicolon Spacing');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_ADVICE;
+ }
+
+ public function process(XHPASTNode $root) {
+ $tokens = $root->selectTokensOfType(';');
+
+ foreach ($tokens as $token) {
+ $prev = $token->getPrevToken();
+
+ if ($prev->isAnyWhitespace()) {
+ $this->raiseLintAtToken(
+ $prev,
+ pht('Space found before semicolon.'),
+ '');
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistSlownessXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistSlownessXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistSlownessXHPASTLinterRule.php
@@ -0,0 +1,111 @@
+<?php
+
+final class ArcanistSlownessXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 36;
+
+ public function getLintName() {
+ return pht('Slow Construct');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ public function process(XHPASTNode $root) {
+ $this->lintStrstrUsedForCheck($root);
+ $this->lintStrposUsedForStart($root);
+ }
+
+ private function lintStrstrUsedForCheck(XHPASTNode $root) {
+ $expressions = $root->selectDescendantsOfType('n_BINARY_EXPRESSION');
+
+ foreach ($expressions as $expression) {
+ $operator = $expression->getChildOfType(1, 'n_OPERATOR');
+ $operator = $operator->getConcreteString();
+
+ if ($operator !== '===' && $operator !== '!==') {
+ continue;
+ }
+
+ $false = $expression->getChildByIndex(0);
+ if ($false->getTypeName() === 'n_SYMBOL_NAME' &&
+ $false->getConcreteString() === 'false') {
+ $strstr = $expression->getChildByIndex(2);
+ } else {
+ $strstr = $false;
+ $false = $expression->getChildByIndex(2);
+ if ($false->getTypeName() !== 'n_SYMBOL_NAME' ||
+ $false->getConcreteString() !== 'false') {
+ continue;
+ }
+ }
+
+ if ($strstr->getTypeName() !== 'n_FUNCTION_CALL') {
+ continue;
+ }
+
+ $name = strtolower($strstr->getChildByIndex(0)->getConcreteString());
+ if ($name === 'strstr' || $name === 'strchr') {
+ $this->raiseLintAtNode(
+ $strstr,
+ pht(
+ 'Use %s for checking if the string contains something.',
+ 'strpos()'));
+ } else if ($name === 'stristr') {
+ $this->raiseLintAtNode(
+ $strstr,
+ pht(
+ 'Use %s for checking if the string contains something.',
+ 'stripos()'));
+ }
+ }
+ }
+
+ private function lintStrposUsedForStart(XHPASTNode $root) {
+ $expressions = $root->selectDescendantsOfType('n_BINARY_EXPRESSION');
+
+ foreach ($expressions as $expression) {
+ $operator = $expression->getChildOfType(1, 'n_OPERATOR');
+ $operator = $operator->getConcreteString();
+
+ if ($operator !== '===' && $operator !== '!==') {
+ continue;
+ }
+
+ $zero = $expression->getChildByIndex(0);
+ if ($zero->getTypeName() === 'n_NUMERIC_SCALAR' &&
+ $zero->getConcreteString() === '0') {
+ $strpos = $expression->getChildByIndex(2);
+ } else {
+ $strpos = $zero;
+ $zero = $expression->getChildByIndex(2);
+ if ($zero->getTypeName() !== 'n_NUMERIC_SCALAR' ||
+ $zero->getConcreteString() !== '0') {
+ continue;
+ }
+ }
+
+ if ($strpos->getTypeName() !== 'n_FUNCTION_CALL') {
+ continue;
+ }
+
+ $name = strtolower($strpos->getChildByIndex(0)->getConcreteString());
+ if ($name === 'strpos') {
+ $this->raiseLintAtNode(
+ $strpos,
+ pht(
+ 'Use %s for checking if the string starts with something.',
+ 'strncmp()'));
+ } else if ($name === 'stripos') {
+ $this->raiseLintAtNode(
+ $strpos,
+ pht(
+ 'Use %s for checking if the string starts with something.',
+ 'strncasecmp()'));
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistStaticThisXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistStaticThisXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistStaticThisXHPASTLinterRule.php
@@ -0,0 +1,59 @@
+<?php
+
+final class ArcanistStaticThisXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 13;
+
+ public function getLintName() {
+ return pht('Use of %s in Static Context', '$this');
+ }
+
+ public function process(XHPASTNode $root) {
+ $classes = $root->selectDescendantsOfType('n_CLASS_DECLARATION');
+
+ foreach ($classes as $class) {
+ $methods = $class->selectDescendantsOfType('n_METHOD_DECLARATION');
+
+ foreach ($methods as $method) {
+ $attributes = $method
+ ->getChildByIndex(0, 'n_METHOD_MODIFIER_LIST')
+ ->selectDescendantsOfType('n_STRING');
+
+ $method_is_static = false;
+ $method_is_abstract = false;
+ foreach ($attributes as $attribute) {
+ if (strtolower($attribute->getConcreteString()) === 'static') {
+ $method_is_static = true;
+ }
+ if (strtolower($attribute->getConcreteString()) === 'abstract') {
+ $method_is_abstract = true;
+ }
+ }
+
+ if ($method_is_abstract) {
+ continue;
+ }
+
+ if (!$method_is_static) {
+ continue;
+ }
+
+ $body = $method->getChildOfType(5, 'n_STATEMENT_LIST');
+
+ $variables = $body->selectDescendantsOfType('n_VARIABLE');
+ foreach ($variables as $variable) {
+ if ($method_is_static &&
+ strtolower($variable->getConcreteString()) === '$this') {
+ $this->raiseLintAtNode(
+ $variable,
+ pht(
+ 'You can not reference `%s` inside a static method.',
+ '$this'));
+ }
+ }
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistSyntaxErrorXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistSyntaxErrorXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistSyntaxErrorXHPASTLinterRule.php
@@ -0,0 +1,14 @@
+<?php
+
+final class ArcanistSyntaxErrorXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 1;
+
+ public function getLintName() {
+ return pht('PHP Syntax Error');
+ }
+
+ public function process(XHPASTNode $root) {}
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistTautologicalExpressionXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistTautologicalExpressionXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistTautologicalExpressionXHPASTLinterRule.php
@@ -0,0 +1,70 @@
+<?php
+
+final class ArcanistTautologicalExpressionXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 20;
+
+ public function getLintName() {
+ return pht('Tautological Expression');
+ }
+
+ public function process(XHPASTNode $root) {
+ $expressions = $root->selectDescendantsOfType('n_BINARY_EXPRESSION');
+
+ static $operators = array(
+ '-' => true,
+ '/' => true,
+ '-=' => true,
+ '/=' => true,
+ '<=' => true,
+ '<' => true,
+ '==' => true,
+ '===' => true,
+ '!=' => true,
+ '!==' => true,
+ '>=' => true,
+ '>' => true,
+ );
+
+ static $logical = array(
+ '||' => true,
+ '&&' => true,
+ );
+
+ foreach ($expressions as $expr) {
+ $operator = $expr->getChildByIndex(1)->getConcreteString();
+ if (!empty($operators[$operator])) {
+ $left = $expr->getChildByIndex(0)->getSemanticString();
+ $right = $expr->getChildByIndex(2)->getSemanticString();
+
+ if ($left === $right) {
+ $this->raiseLintAtNode(
+ $expr,
+ pht(
+ 'Both sides of this expression are identical, so it always '.
+ 'evaluates to a constant.'));
+ }
+ }
+
+ if (!empty($logical[$operator])) {
+ $left = $expr->getChildByIndex(0)->getSemanticString();
+ $right = $expr->getChildByIndex(2)->getSemanticString();
+
+ // NOTE: These will be null to indicate "could not evaluate".
+ $left = $this->evaluateStaticBoolean($left);
+ $right = $this->evaluateStaticBoolean($right);
+
+ if (($operator === '||' && ($left === true || $right === true)) ||
+ ($operator === '&&' && ($left === false || $right === false))) {
+ $this->raiseLintAtNode(
+ $expr,
+ pht(
+ 'The logical value of this expression is static. '.
+ 'Did you forget to remove some debugging code?'));
+ }
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistTodoCommentXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistTodoCommentXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistTodoCommentXHPASTLinterRule.php
@@ -0,0 +1,47 @@
+<?php
+
+final class ArcanistTodoCommentXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 16;
+
+ public function getLintName() {
+ return pht('TODO Comment');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_DISABLED;
+ }
+
+ public function process(XHPASTNode $root) {
+ $comments = $root->selectTokensOfTypes(array(
+ 'T_COMMENT',
+ 'T_DOC_COMMENT',
+ ));
+
+ foreach ($comments as $token) {
+ $value = $token->getValue();
+ if ($token->getTypeName() === 'T_DOC_COMMENT') {
+ $regex = '/(TODO|@todo)/';
+ } else {
+ $regex = '/TODO/';
+ }
+
+ $matches = null;
+ $preg = preg_match_all(
+ $regex,
+ $value,
+ $matches,
+ PREG_OFFSET_CAPTURE);
+
+ foreach ($matches[0] as $match) {
+ list($string, $offset) = $match;
+ $this->raiseLintAtOffset(
+ $token->getOffset() + $offset,
+ pht('This comment has a TODO.'),
+ $string);
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistUnableToParseXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistUnableToParseXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistUnableToParseXHPASTLinterRule.php
@@ -0,0 +1,18 @@
+<?php
+
+final class ArcanistUnableToParseXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 2;
+
+ public function getLintName() {
+ return pht('Unable to Parse');
+ }
+
+ public function getLintSeverity() {
+ return ArcanistLintSeverity::SEVERITY_WARNING;
+ }
+
+ public function process(XHPASTNode $root) {}
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistUndeclaredVariableXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistUndeclaredVariableXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistUndeclaredVariableXHPASTLinterRule.php
@@ -0,0 +1,340 @@
+<?php
+
+final class ArcanistUndeclaredVariableXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 5;
+
+ public function getLintName() {
+ return pht('Use of Undeclared Variable');
+ }
+
+ public function process(XHPASTNode $root) {
+ // These things declare variables in a function:
+ // - Explicit parameters
+ // - Assignment
+ // - Assignment via list()
+ // - Static
+ // - Global
+ // - Lexical vars
+ // - Builtins (`$this`)
+ // - `foreach()`
+ // - `catch`
+ //
+ // These things make lexical scope unknowable:
+ // - Use of `extract()`
+ // - Assignment to variable variables (`$$x`)
+ // - Global with variable variables
+ //
+ // These things don't count as "using" a variable:
+ // - `isset()`
+ // - `empty()`
+ // - Static class variables
+ //
+ // The general approach here is to find each function/method declaration,
+ // then:
+ //
+ // 1. Identify all the variable declarations, and where they first occur
+ // in the function/method declaration.
+ // 2. Identify all the uses that don't really count (as above).
+ // 3. Everything else must be a use of a variable.
+ // 4. For each variable, check if any uses occur before the declaration
+ // and warn about them.
+ //
+ // We also keep track of where lexical scope becomes unknowable (e.g.,
+ // because the function calls `extract()` or uses dynamic variables,
+ // preventing us from keeping track of which variables are defined) so we
+ // can stop issuing warnings after that.
+ //
+ // TODO: Support functions defined inside other functions which is commonly
+ // used with anonymous functions.
+
+ $defs = $root->selectDescendantsOfTypes(array(
+ 'n_FUNCTION_DECLARATION',
+ 'n_METHOD_DECLARATION',
+ ));
+
+ foreach ($defs as $def) {
+ // We keep track of the first offset where scope becomes unknowable, and
+ // silence any warnings after that. Default it to `INT_MAX` so we can
+ // `min()` it later to keep track of the first problem we encounter.
+ $scope_destroyed_at = PHP_INT_MAX;
+
+ $declarations = array(
+ '$this' => 0,
+ ) + array_fill_keys($this->getSuperGlobalNames(), 0);
+ $declaration_tokens = array();
+ $exclude_tokens = array();
+ $vars = array();
+
+ // First up, find all the different kinds of declarations, as explained
+ // above. Put the tokens into the $vars array.
+
+ $param_list = $def->getChildOfType(3, 'n_DECLARATION_PARAMETER_LIST');
+ $param_vars = $param_list->selectDescendantsOfType('n_VARIABLE');
+ foreach ($param_vars as $var) {
+ $vars[] = $var;
+ }
+
+ // This is PHP5.3 closure syntax: `function () use ($x) {};`
+ $lexical_vars = $def
+ ->getChildByIndex(4)
+ ->selectDescendantsOfType('n_VARIABLE');
+ foreach ($lexical_vars as $var) {
+ $vars[] = $var;
+ }
+
+ $body = $def->getChildByIndex(5);
+ if ($body->getTypeName() === 'n_EMPTY') {
+ // Abstract method declaration.
+ continue;
+ }
+
+ $static_vars = $body
+ ->selectDescendantsOfType('n_STATIC_DECLARATION')
+ ->selectDescendantsOfType('n_VARIABLE');
+ foreach ($static_vars as $var) {
+ $vars[] = $var;
+ }
+
+
+ $global_vars = $body
+ ->selectDescendantsOfType('n_GLOBAL_DECLARATION_LIST');
+ foreach ($global_vars as $var_list) {
+ foreach ($var_list->getChildren() as $var) {
+ if ($var->getTypeName() === 'n_VARIABLE') {
+ $vars[] = $var;
+ } else {
+ // Dynamic global variable, i.e. `global $$x;`.
+ $scope_destroyed_at = min($scope_destroyed_at, $var->getOffset());
+ // An error is raised elsewhere, no need to raise here.
+ }
+ }
+ }
+
+ // Include `catch (Exception $ex)`, but not variables in the body of the
+ // catch block.
+ $catches = $body->selectDescendantsOfType('n_CATCH');
+ foreach ($catches as $catch) {
+ $vars[] = $catch->getChildOfType(1, 'n_VARIABLE');
+ }
+
+ $binary = $body->selectDescendantsOfType('n_BINARY_EXPRESSION');
+ foreach ($binary as $expr) {
+ if ($expr->getChildByIndex(1)->getConcreteString() !== '=') {
+ continue;
+ }
+ $lval = $expr->getChildByIndex(0);
+ if ($lval->getTypeName() === 'n_VARIABLE') {
+ $vars[] = $lval;
+ } else if ($lval->getTypeName() === 'n_LIST') {
+ // Recursively grab everything out of list(), since the grammar
+ // permits `list()` to be nested. Also note that `list()` is ONLY
+ // valid as an lval assignments, so we could safely lift this out of
+ // the `n_BINARY_EXPRESSION` branch.
+ $assign_vars = $lval->selectDescendantsOfType('n_VARIABLE');
+ foreach ($assign_vars as $var) {
+ $vars[] = $var;
+ }
+ }
+
+ if ($lval->getTypeName() === 'n_VARIABLE_VARIABLE') {
+ $scope_destroyed_at = min($scope_destroyed_at, $lval->getOffset());
+ // No need to raise here since we raise an error elsewhere.
+ }
+ }
+
+ $calls = $body->selectDescendantsOfType('n_FUNCTION_CALL');
+ foreach ($calls as $call) {
+ $name = strtolower($call->getChildByIndex(0)->getConcreteString());
+
+ if ($name === 'empty' || $name === 'isset') {
+ $params = $call
+ ->getChildOfType(1, 'n_CALL_PARAMETER_LIST')
+ ->selectDescendantsOfType('n_VARIABLE');
+ foreach ($params as $var) {
+ $exclude_tokens[$var->getID()] = true;
+ }
+ continue;
+ }
+ if ($name !== 'extract') {
+ continue;
+ }
+ $scope_destroyed_at = min($scope_destroyed_at, $call->getOffset());
+ }
+
+ // Now we have every declaration except `foreach()`, handled below. Build
+ // two maps, one which just keeps track of which tokens are part of
+ // declarations (`$declaration_tokens`) and one which has the first
+ // offset where a variable is declared ($declarations).
+
+ foreach ($vars as $var) {
+ $concrete = $this->getConcreteVariableString($var);
+ $declarations[$concrete] = min(
+ idx($declarations, $concrete, PHP_INT_MAX),
+ $var->getOffset());
+ $declaration_tokens[$var->getID()] = true;
+ }
+
+ // Excluded tokens are ones we don't "count" as being used, described
+ // above. Put them into `$exclude_tokens`.
+
+ $class_statics = $body
+ ->selectDescendantsOfType('n_CLASS_STATIC_ACCESS');
+ $class_static_vars = $class_statics
+ ->selectDescendantsOfType('n_VARIABLE');
+ foreach ($class_static_vars as $var) {
+ $exclude_tokens[$var->getID()] = true;
+ }
+
+ // Find all the variables in scope, and figure out where they are used.
+ // We want to find `foreach()` iterators which are both declared before
+ // and used after the `foreach()` loop.
+
+ $uses = array();
+
+ $all_vars = $body->selectDescendantsOfType('n_VARIABLE');
+ $all = array();
+
+ // NOTE: `$all_vars` is not a real array so we can't `unset()` it.
+ foreach ($all_vars as $var) {
+ // Be strict since it's easier; we don't let you reuse an iterator you
+ // declared before a loop after the loop, even if you're just assigning
+ // to it.
+
+ $concrete = $this->getConcreteVariableString($var);
+ $uses[$concrete][$var->getID()] = $var->getOffset();
+
+ if (isset($declaration_tokens[$var->getID()])) {
+ // We know this is part of a declaration, so it's fine.
+ continue;
+ }
+ if (isset($exclude_tokens[$var->getID()])) {
+ // We know this is part of `isset()` or similar, so it's fine.
+ continue;
+ }
+
+ $all[$var->getOffset()] = $concrete;
+ }
+
+ // Do `foreach()` last, we want to handle implicit redeclaration of a
+ // variable already in scope since this probably means we're ovewriting a
+ // local.
+
+ // NOTE: Processing `foreach` expressions in order allows programs which
+ // reuse iterator variables in other `foreach()` loops -- this is fine.
+ // We have a separate warning to prevent nested loops from reusing the
+ // same iterators.
+
+ $foreaches = $body->selectDescendantsOfType('n_FOREACH');
+ $all_foreach_vars = array();
+ foreach ($foreaches as $foreach) {
+ $foreach_expr = $foreach->getChildOfType(0, 'n_FOREACH_EXPRESSION');
+
+ $foreach_vars = array();
+
+ // Determine the end of the `foreach()` loop.
+ $foreach_tokens = $foreach->getTokens();
+ $last_token = end($foreach_tokens);
+ $foreach_end = $last_token->getOffset();
+
+ $key_var = $foreach_expr->getChildByIndex(1);
+ if ($key_var->getTypeName() === 'n_VARIABLE') {
+ $foreach_vars[] = $key_var;
+ }
+
+ $value_var = $foreach_expr->getChildByIndex(2);
+ if ($value_var->getTypeName() === 'n_VARIABLE') {
+ $foreach_vars[] = $value_var;
+ } else {
+ // The root-level token may be a reference, as in
+ // `foreach ($a as $b => &$c) { ... }`. Reach into the
+ // `n_VARIABLE_REFERENCE` node to grab the `n_VARIABLE` node.
+ $var = $value_var->getChildByIndex(0);
+ if ($var->getTypeName() === 'n_VARIABLE_VARIABLE') {
+ $var = $var->getChildByIndex(0);
+ }
+ $foreach_vars[] = $var;
+ }
+
+ // Remove all uses of the iterators inside of the `foreach()` loop from
+ // the `$uses` map.
+
+ foreach ($foreach_vars as $var) {
+ $concrete = $this->getConcreteVariableString($var);
+ $offset = $var->getOffset();
+
+ foreach ($uses[$concrete] as $id => $use_offset) {
+ if (($use_offset >= $offset) && ($use_offset < $foreach_end)) {
+ unset($uses[$concrete][$id]);
+ }
+ }
+
+ $all_foreach_vars[] = $var;
+ }
+ }
+
+ foreach ($all_foreach_vars as $var) {
+ $concrete = $this->getConcreteVariableString($var);
+ $offset = $var->getOffset();
+
+ // This is a declaration, exclude it from the "declare variables prior
+ // to use" check below.
+ unset($all[$var->getOffset()]);
+
+ $vars[] = $var;
+ }
+
+ // Now rebuild declarations to include `foreach()`.
+
+ foreach ($vars as $var) {
+ $concrete = $this->getConcreteVariableString($var);
+ $declarations[$concrete] = min(
+ idx($declarations, $concrete, PHP_INT_MAX),
+ $var->getOffset());
+ $declaration_tokens[$var->getID()] = true;
+ }
+
+ foreach (array('n_STRING_SCALAR', 'n_HEREDOC') as $type) {
+ foreach ($body->selectDescendantsOfType($type) as $string) {
+ foreach ($string->getStringVariables() as $offset => $var) {
+ $all[$string->getOffset() + $offset - 1] = '$'.$var;
+ }
+ }
+ }
+
+ // Issue a warning for every variable token, unless it appears in a
+ // declaration, we know about a prior declaration, we have explicitly
+ // excluded it, or scope has been made unknowable before it appears.
+
+ $issued_warnings = array();
+ foreach ($all as $offset => $concrete) {
+ if ($offset >= $scope_destroyed_at) {
+ // This appears after an `extract()` or `$$var` so we have no idea
+ // whether it's legitimate or not. We raised a harshly-worded warning
+ // when scope was made unknowable, so just ignore anything we can't
+ // figure out.
+ continue;
+ }
+ if ($offset >= idx($declarations, $concrete, PHP_INT_MAX)) {
+ // The use appears after the variable is declared, so it's fine.
+ continue;
+ }
+ if (!empty($issued_warnings[$concrete])) {
+ // We've already issued a warning for this variable so we don't need
+ // to issue another one.
+ continue;
+ }
+ $this->raiseLintAtOffset(
+ $offset,
+ pht(
+ 'Declare variables prior to use (even if you are passing them '.
+ 'as reference parameters). You may have misspelled this '.
+ 'variable name.'),
+ $concrete);
+ $issued_warnings[$concrete] = true;
+ }
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistVariableReusedAsIteratorXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistVariableReusedAsIteratorXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistVariableReusedAsIteratorXHPASTLinterRule.php
@@ -0,0 +1,251 @@
+<?php
+
+final class ArcanistVariableReusedAsIteratorXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 32;
+
+ public function getLintName() {
+ return pht('Variable Reused As Iterator');
+ }
+
+ public function process(XHPASTNode $root) {
+ // TODO: Simplify this method. It probably has a lot of dead code.
+
+ $defs = $root->selectDescendantsOfTypes(array(
+ 'n_FUNCTION_DECLARATION',
+ 'n_METHOD_DECLARATION',
+ ));
+
+ foreach ($defs as $def) {
+ $declarations = array(
+ '$this' => 0,
+ ) + array_fill_keys($this->getSuperGlobalNames(), 0);
+ $declaration_tokens = array();
+ $exclude_tokens = array();
+ $vars = array();
+
+ // First up, find all the different kinds of declarations, as explained
+ // above. Put the tokens into the `$vars` array.
+
+ $param_list = $def->getChildOfType(3, 'n_DECLARATION_PARAMETER_LIST');
+ $param_vars = $param_list->selectDescendantsOfType('n_VARIABLE');
+ foreach ($param_vars as $var) {
+ $vars[] = $var;
+ }
+
+ // This is PHP5.3 closure syntax: `function () use ($x) {};`
+ $lexical_vars = $def
+ ->getChildByIndex(4)
+ ->selectDescendantsOfType('n_VARIABLE');
+ foreach ($lexical_vars as $var) {
+ $vars[] = $var;
+ }
+
+ $body = $def->getChildByIndex(5);
+ if ($body->getTypeName() === 'n_EMPTY') {
+ // Abstract method declaration.
+ continue;
+ }
+
+ $static_vars = $body
+ ->selectDescendantsOfType('n_STATIC_DECLARATION')
+ ->selectDescendantsOfType('n_VARIABLE');
+ foreach ($static_vars as $var) {
+ $vars[] = $var;
+ }
+
+ $global_vars = $body
+ ->selectDescendantsOfType('n_GLOBAL_DECLARATION_LIST');
+ foreach ($global_vars as $var_list) {
+ foreach ($var_list->getChildren() as $var) {
+ if ($var->getTypeName() === 'n_VARIABLE') {
+ $vars[] = $var;
+ }
+ }
+ }
+
+ // Include `catch (Exception $ex)`, but not variables in the body of the
+ // catch block.
+ $catches = $body->selectDescendantsOfType('n_CATCH');
+ foreach ($catches as $catch) {
+ $vars[] = $catch->getChildOfType(1, 'n_VARIABLE');
+ }
+
+ $binary = $body->selectDescendantsOfType('n_BINARY_EXPRESSION');
+ foreach ($binary as $expr) {
+ if ($expr->getChildByIndex(1)->getConcreteString() !== '=') {
+ continue;
+ }
+ $lval = $expr->getChildByIndex(0);
+ if ($lval->getTypeName() === 'n_VARIABLE') {
+ $vars[] = $lval;
+ } else if ($lval->getTypeName() === 'n_LIST') {
+ // Recursively grab everything out of `list()`, since the grammar
+ // permits `list()` to be nested. Also note that `list()` is ONLY
+ // valid as an lval assignments, so we could safely lift this out of
+ // the `n_BINARY_EXPRESSION` branch.
+ $assign_vars = $lval->selectDescendantsOfType('n_VARIABLE');
+ foreach ($assign_vars as $var) {
+ $vars[] = $var;
+ }
+ }
+ }
+
+ $calls = $body->selectDescendantsOfType('n_FUNCTION_CALL');
+ foreach ($calls as $call) {
+ $name = strtolower($call->getChildByIndex(0)->getConcreteString());
+
+ if ($name === 'empty' || $name === 'isset') {
+ $params = $call
+ ->getChildOfType(1, 'n_CALL_PARAMETER_LIST')
+ ->selectDescendantsOfType('n_VARIABLE');
+ foreach ($params as $var) {
+ $exclude_tokens[$var->getID()] = true;
+ }
+ continue;
+ }
+ if ($name !== 'extract') {
+ continue;
+ }
+ }
+
+ // Now we have every declaration except `foreach()`, handled below. Build
+ // two maps, one which just keeps track of which tokens are part of
+ // declarations (`$declaration_tokens`) and one which has the first
+ // offset where a variable is declared (`$declarations`).
+
+ foreach ($vars as $var) {
+ $concrete = $this->getConcreteVariableString($var);
+ $declarations[$concrete] = min(
+ idx($declarations, $concrete, PHP_INT_MAX),
+ $var->getOffset());
+ $declaration_tokens[$var->getID()] = true;
+ }
+
+ // Excluded tokens are ones we don't "count" as being used, described
+ // above. Put them into `$exclude_tokens`.
+
+ $class_statics = $body
+ ->selectDescendantsOfType('n_CLASS_STATIC_ACCESS');
+ $class_static_vars = $class_statics
+ ->selectDescendantsOfType('n_VARIABLE');
+ foreach ($class_static_vars as $var) {
+ $exclude_tokens[$var->getID()] = true;
+ }
+
+ // Find all the variables in scope, and figure out where they are used.
+ // We want to find `foreach()` iterators which are both declared before
+ // and used after the `foreach()` loop.
+
+ $uses = array();
+
+ $all_vars = $body->selectDescendantsOfType('n_VARIABLE');
+
+ // NOTE: `$all_vars` is not a real array so we can't `unset()` it.
+ foreach ($all_vars as $var) {
+ // Be strict since it's easier; we don't let you reuse an iterator you
+ // declared before a loop after the loop, even if you're just assigning
+ // to it.
+
+ $concrete = $this->getConcreteVariableString($var);
+ $uses[$concrete][$var->getID()] = $var->getOffset();
+
+ if (isset($declaration_tokens[$var->getID()])) {
+ // We know this is part of a declaration, so it's fine.
+ continue;
+ }
+ if (isset($exclude_tokens[$var->getID()])) {
+ // We know this is part of `isset()` or similar, so it's fine.
+ continue;
+ }
+ }
+
+ // Do `foreach()` last, we want to handle implicit redeclaration of a
+ // variable already in scope since this probably means we're ovewriting a
+ // local.
+
+ // NOTE: Processing `foreach` expressions in order allows programs which
+ // reuse iterator variables in other `foreach()` loops -- this is fine.
+ // We have a separate warning to prevent nested loops from reusing the
+ // same iterators.
+
+ $foreaches = $body->selectDescendantsOfType('n_FOREACH');
+ $all_foreach_vars = array();
+ foreach ($foreaches as $foreach) {
+ $foreach_expr = $foreach->getChildOfType(0, 'n_FOREACH_EXPRESSION');
+
+ $foreach_vars = array();
+
+ // Determine the end of the `foreach()` loop.
+ $foreach_tokens = $foreach->getTokens();
+ $last_token = end($foreach_tokens);
+ $foreach_end = $last_token->getOffset();
+
+ $key_var = $foreach_expr->getChildByIndex(1);
+ if ($key_var->getTypeName() === 'n_VARIABLE') {
+ $foreach_vars[] = $key_var;
+ }
+
+ $value_var = $foreach_expr->getChildByIndex(2);
+ if ($value_var->getTypeName() === 'n_VARIABLE') {
+ $foreach_vars[] = $value_var;
+ } else {
+ // The root-level token may be a reference, as in
+ // `foreach ($a as $b => &$c) { ... }`. Reach into the
+ // `n_VARIABLE_REFERENCE` node to grab the `n_VARIABLE` node.
+ $var = $value_var->getChildByIndex(0);
+ if ($var->getTypeName() === 'n_VARIABLE_VARIABLE') {
+ $var = $var->getChildByIndex(0);
+ }
+ $foreach_vars[] = $var;
+ }
+
+ // Remove all uses of the iterators inside of the `foreach()` loop from
+ // the `$uses` map.
+
+ foreach ($foreach_vars as $var) {
+ $concrete = $this->getConcreteVariableString($var);
+ $offset = $var->getOffset();
+
+ foreach ($uses[$concrete] as $id => $use_offset) {
+ if ($use_offset >= $offset && $use_offset < $foreach_end) {
+ unset($uses[$concrete][$id]);
+ }
+ }
+
+ $all_foreach_vars[] = $var;
+ }
+ }
+
+ foreach ($all_foreach_vars as $var) {
+ $concrete = $this->getConcreteVariableString($var);
+ $offset = $var->getOffset();
+
+ // If a variable was declared before a `foreach()` and is used after
+ // it, raise a message.
+
+ if (isset($declarations[$concrete])) {
+ if ($declarations[$concrete] < $offset) {
+ if (!empty($uses[$concrete]) && max($uses[$concrete]) > $offset) {
+ $message = $this->raiseLintAtNode(
+ $var,
+ pht(
+ 'This iterator variable is a previously declared local '.
+ 'variable. To avoid overwriting locals, do not reuse them '.
+ 'as iterator variables.'));
+ $message->setOtherLocations(array(
+ $this->getOtherLocation($declarations[$concrete]),
+ $this->getOtherLocation(max($uses[$concrete])),
+ ));
+ }
+ }
+ }
+
+ $vars[] = $var;
+ }
+
+ }
+ }
+
+}
diff --git a/src/lint/linter/xhpast/rules/ArcanistVariableVariableXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistVariableVariableXHPASTLinterRule.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/ArcanistVariableVariableXHPASTLinterRule.php
@@ -0,0 +1,24 @@
+<?php
+
+final class ArcanistVariableVariableXHPASTLinterRule
+ extends ArcanistXHPASTLinterRule {
+
+ const ID = 3;
+
+ public function getLintName() {
+ return pht('Use of Variable Variable');
+ }
+
+ public function process(XHPASTNode $root) {
+ $vvars = $root->selectDescendantsOfType('n_VARIABLE_VARIABLE');
+
+ foreach ($vvars as $vvar) {
+ $this->raiseLintAtNode(
+ $vvar,
+ pht(
+ 'Rewrite this code to use an array. Variable variables are unclear '.
+ 'and hinder static analysis.'));
+ }
+ }
+
+}

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