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diff --git a/src/lint/linter/ArcanistExternalLinter.php b/src/lint/linter/ArcanistExternalLinter.php
--- a/src/lint/linter/ArcanistExternalLinter.php
+++ b/src/lint/linter/ArcanistExternalLinter.php
@@ -13,6 +13,7 @@
private $bin;
private $interpreter;
private $flags;
+ private $minimumVersion;
/* -( Interpreters, Binaries and Flags )----------------------------------- */
@@ -140,6 +141,15 @@
return array();
}
+ /**
+ * TODO
+ *
+ * @return string
+ */
+ protected function getDefaultMinimumVersion() {
+ return null;
+ }
+
/**
* Override default flags with custom flags. If not overridden, flags provided
@@ -232,6 +242,26 @@
return $this;
}
+ /**
+ * TODO
+ *
+ * @return string
+ */
+ final public function getMinimumVersion() {
+ return coalesce($this->minimumVersion, $this->getDefaultMinimumVersion());
+ }
+
+ /**
+ * TODO
+ *
+ * @param string
+ * @return this
+ */
+ final public function setMinimumVersion($version) {
+ $this->minimumVersion = $version;
+ return $this;
+ }
+
/* -( Parsing Linter Output )---------------------------------------------- */
@@ -397,6 +427,14 @@
final protected function buildFutures(array $paths) {
$executable = $this->getExecutableCommand();
+ $version = $this->getMinimumVersion();
+ if ($version) {
+ if (!$this->compareVersion($version, '>=')) {
+ // TODO: Provide a more descriptive error message.
+ throw new ArcanistUsageException('Wrong version');
+ }
+ }
+
$bin = csprintf('%C %Ls', $executable, $this->getCommandFlags());
$futures = array();
@@ -459,6 +497,10 @@
'Provide a list of additional flags to pass to the linter on the '.
'command line.'),
),
+ 'minimum-version' => array(
+ 'type' => 'optional string',
+ 'help' => pht(''),
+ ),
);
if ($this->shouldUseInterpreter()) {
@@ -528,6 +570,9 @@
}
$this->setFlags($value);
return;
+ case 'minimum-version':
+ $this->minimumVersion = $value;
+ return;
}
return parent::setLinterConfigurationValue($key, $value);
diff --git a/src/lint/linter/ArcanistLinter.php b/src/lint/linter/ArcanistLinter.php
--- a/src/lint/linter/ArcanistLinter.php
+++ b/src/lint/linter/ArcanistLinter.php
@@ -312,6 +312,33 @@
return null;
}
+ /**
+ * Compare the version of the linter with a target version.
+ *
+ * @param string The target version for the linter.
+ * @param string The desired version relationship. The possible values are
+ * `<`, `<=`, `>`, `>=`, `==`, `=`, `!=` and `<>`.
+ * @return bool True if the relationship is the one specified by the operator,
+ * false otherwise.
+ */
+ protected function compareVersion($target_version, $operator) {
+ $version = $this->getVersion();
+
+ if ($version === null) {
+ throw new Exception(pht(
+ 'Version cannot be compared because %s does not implement the '.
+ '`getVersion` method',
+ get_class($this)));
+ } else if ($version === false) {
+ // TODO: We should output the minimum version requirement here.
+ throw new Exception(pht('Unable to parse version.'));
+ }
+
+ // The PHP version_compare method does a pretty good job in the general
+ // case.
+ return version_compare($version, $target_version, $operator);
+ }
+
public function didRunLinters() {
// This is a hook.
}

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