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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
@@ -156,6 +156,7 @@
'ArcanistRevertWorkflow' => 'workflow/ArcanistRevertWorkflow.php',
'ArcanistRubyLinter' => 'lint/linter/ArcanistRubyLinter.php',
'ArcanistRubyLinterTestCase' => 'lint/linter/__tests__/ArcanistRubyLinterTestCase.php',
+ 'ArcanistScalastyleLinter' => 'lint/linter/ArcanistScalastyleLinter.php',
'ArcanistScriptAndRegexLinter' => 'lint/linter/ArcanistScriptAndRegexLinter.php',
'ArcanistSetConfigWorkflow' => 'workflow/ArcanistSetConfigWorkflow.php',
'ArcanistSettings' => 'configuration/ArcanistSettings.php',
@@ -337,6 +338,7 @@
'ArcanistRevertWorkflow' => 'ArcanistWorkflow',
'ArcanistRubyLinter' => 'ArcanistExternalLinter',
'ArcanistRubyLinterTestCase' => 'ArcanistArcanistLinterTestCase',
+ 'ArcanistScalastyleLinter' => 'ArcanistExternalLinter',
'ArcanistScriptAndRegexLinter' => 'ArcanistLinter',
'ArcanistSetConfigWorkflow' => 'ArcanistWorkflow',
'ArcanistShellCompleteWorkflow' => 'ArcanistWorkflow',
diff --git a/src/lint/linter/ArcanistScalastyleLinter.php b/src/lint/linter/ArcanistScalastyleLinter.php
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/ArcanistScalastyleLinter.php
@@ -0,0 +1,178 @@
+<?php
+
+final class ArcanistScalastyleLinter extends ArcanistExternalLinter {
+
+ private $jarPath = null;
+ private $configPath = null;
+
+ public function getInfoURI() {
+ return 'http://www.scalastyle.org/';
+ }
+
+ public function getInfoDescription() {
+ return 'Scalastyle linter for Scala code';
+ }
+
+ public function getLinterName() {
+ return 'scalastyle';
+ }
+
+ public function getLinterConfigurationName() {
+ return 'scalastyle';
+ }
+
+ public function getDefaultBinary() {
+ return 'java';
+ }
+
+ public function getInstallInstructions() {
+ return 'See http://www.scalastyle.org/command-line.html';
+ }
+
+ public function shouldExpectCommandErrors() {
+ return true;
+ }
+
+ protected function getMandatoryFlags() {
+ if ($this->jarPath === null) {
+ throw new ArcanistUsageException(
+ pht('Scalastyle JAR path must be configured.'));
+ }
+ if ($this->configPath === null) {
+ throw new ArcanistUsageException(
+ pht('Scalastyle config XML path must be configured.'));
+ }
+
+ return array(
+ '-jar', $this->jarPath,
+ '--config', $this->configPath,
+ '--quiet', 'true');
+ }
+
+ protected function getDefaultFlags() {
+ return array();
+ }
+
+ protected function parseLinterOutput($path, $err, $stdout, $stderr) {
+
+ $messages = array();
+
+ $output = trim($stdout);
+ if (strlen($output) === 0) {
+ return $messages;
+ }
+
+ $lines = explode(PHP_EOL, $output);
+
+ foreach ($lines as $line) {
+ $lintMessage = id(new ArcanistLintMessage())
+ ->setPath($path)
+ ->setCode($this->getLinterName());
+
+ $matches = array();
+ if (preg_match('/^([a-z]+)/', $line, $matches)) {
+ switch ($matches[1]) {
+ case 'warning':
+ $lintMessage->setSeverity(ArcanistLintSeverity::SEVERITY_WARNING);
+ break;
+ case 'error':
+ $lintMessage->setSeverity(ArcanistLintSeverity::SEVERITY_ERROR);
+ break;
+ }
+ }
+
+ $matches = array();
+ if (preg_match('/message=([^=]+ )/', $line, $matches)) {
+ $lintMessage->setDescription(trim($matches[1]));
+ } else if (preg_match('/message=([^=]+$)/', $line, $matches)) {
+ $lintMessage->setDescription(trim($matches[1]));
+ }
+
+ $matches = array();
+ if (preg_match('/line=([^=]+ )/', $line, $matches)) {
+ $lintMessage->setLine(trim($matches[1]));
+ } else if (preg_match('/line=([^=]+$)/', $line, $matches)) {
+ $lintMessage->setLine(trim($matches[1]));
+ }
+
+ $matches = array();
+ if (preg_match('/column=([^=]+ )/', $line, $matches)) {
+ $lintMessage->setChar(trim($matches[1]));
+ } else if (preg_match('/column=([^=]+$)/', $line, $matches)) {
+ $lintMessage->setChar(trim($matches[1]));
+ }
+
+ $messages[] = $lintMessage;
+ }
+
+ return $messages;
+ }
+
+ public function getLinterConfigurationOptions() {
+ $options = array(
+ 'jar' => array(
+ 'type' => 'optional string | list<string>',
+ 'help' => pht(
+ 'Specify a string (or list of strings) identifying the Scalastyle '.
+ 'JAR file.')
+ ),
+ 'config' => array(
+ 'type' => 'optional string | list<string>',
+ 'help' => pht(
+ 'Specify a string (or list of strings) identifying the Scalastyle '.
+ 'config XML file.')
+ ),
+ );
+
+ return $options + parent::getLinterConfigurationOptions();
+ }
+
+ public function setLinterConfigurationValue($key, $value) {
+ switch ($key) {
+ case 'jar':
+ $working_copy = $this->getEngine()->getWorkingCopy();
+ $root = $working_copy->getProjectRoot();
+
+ foreach ((array)$value as $path) {
+ if (Filesystem::pathExists($path)) {
+ $this->jarPath = $path;
+ return;
+ }
+
+ $path = Filesystem::resolvePath($path, $root);
+
+ if (Filesystem::pathExists($path)) {
+ $this->jarPath = $path;
+ return;
+ }
+ }
+
+ throw new ArcanistUsageException(
+ pht('None of the configured Scalastyle JARs can be located.'));
+
+ case 'config':
+ $working_copy = $this->getEngine()->getWorkingCopy();
+ $root = $working_copy->getProjectRoot();
+
+ foreach ((array)$value as $path) {
+ if (Filesystem::pathExists($path)) {
+ $this->configPath = $path;
+ return;
+ }
+
+ $path = Filesystem::resolvePath($path, $root);
+
+ if (Filesystem::pathExists($path)) {
+ $this->configPath = $path;
+ return;
+ }
+ }
+
+ throw new ArcanistUsageException(
+ pht('None of the configured Scalastyle configs can be located.'));
+ }
+
+ return parent::setLinterConfigurationValue($key, $value);
+ }
+
+}

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