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ExampleLintEngine.php
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<?php
/**
* This a simple example lint engine which just applies the
* @{class:ArcanistPyLintLinter} to any Python files. For a more complex
* example, see @{class:PhutilLintEngine}.
*
* @group linter
*/
final class ExampleLintEngine extends ArcanistLintEngine {
public function buildLinters() {
// This is a list of paths which the user wants to lint. Either they
// provided them explicitly, or arc figured them out from a commit or set
// of changes. The engine needs to return a list of ArcanistLinter objects,
// representing the linters which should be run on these files.
$paths = $this->getPaths();
// The ArcanistPyLintLinter runs "PyLint" (an open source python linter) on
// files you give it. There are several linters available by default like
// this one which you can use out of the box, or you can write your own.
// Linters are responsible for actually analyzing the contents of a file
// and raising warnings and errors.
$pylint_linter = new ArcanistPyLintLinter();
// Remove any paths that don't exist before we add paths to linters. We want
// to do this for linters that operate on file contents because the
// generated list of paths will include deleted paths when a file is
// removed.
foreach ($paths as $key => $path) {
if (!$this->pathExists($path)) {
unset($paths[$key]);
}
}
foreach ($paths as $path) {
if (!preg_match('/\.py$/', $path)) {
// This isn't a python file, so don't try to apply the PyLint linter
// to it.
continue;
}
if (preg_match('@^externals/@', $path)) {
// This is just an example of how to exclude a path so it doesn't get
// linted. If you put third-party code in an externals/ directory, you
// can just have your lint engine ignore it.
continue;
}
// Add the path, to tell the linter it should examine the source code
// to try to find problems.
$pylint_linter->addPath($path);
}
// We only built one linter, but you can build more than one (e.g., a
// Javascript linter for JS), and return a list of linters to execute. You
// can also add a path to more than one linter (for example, if you want
// to run a Python linter and a more general text linter on every .py file).
return array(
$pylint_linter,
);
}
}

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Content licensed under Creative Commons Attribution-ShareAlike 4.0 (CC-BY-SA) unless otherwise noted; code licensed under Apache 2.0 or other open source licenses. · CC BY-SA 4.0 · Apache 2.0