ArcanistSvnHookPreCommitWorkflow.php
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ArcanistSvnHookPreCommitWorkflow.php
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	<?php

	/**
	* Installable as an SVN "pre-commit" hook.
	*
	* @group workflow
	*/
	final class ArcanistSvnHookPreCommitWorkflow extends ArcanistBaseWorkflow {

	public function getWorkflowName() {
	return 'svn-hook-pre-commit';
	}

	public function getCommandSynopses() {
	return phutil_console_format(<<<EOTEXT
	svn-hook-pre-commit __repository__ __transaction__
	EOTEXT
	);
	}

	public function getCommandHelp() {
	return phutil_console_format(<<<EOTEXT
	Supports: svn
	You can install this as an SVN pre-commit hook. For more information,
	see the article "Installing Arcanist SVN Hooks" in the Arcanist
	documentation.
	EOTEXT
	);
	}

	public function getArguments() {
	return array(
	'*' => 'svnargs',
	);
	}

	public function shouldShellComplete() {
	return false;
	}

	public function run() {

	$svnargs = $this->getArgument('svnargs');
	$repository = $svnargs[0];
	$transaction = $svnargs[1];

	list($commit_message) = execx(
	'svnlook log --transaction %s %s',
	$transaction,
	$repository);

	if (strpos($commit_message, '@bypass-lint') !== false) {
	return 0;
	}


	// TODO: Do stuff with commit message.

	list($changed) = execx(
	'svnlook changed --transaction %s %s',
	$transaction,
	$repository);

	$paths = array();
	$changed = explode("\n", trim($changed));
	foreach ($changed as $line) {
	$matches = null;
	preg_match('/^..\s(.)$/', $line, $matches);
	$paths[$matches[1]] = strlen($matches[1]);
	}

	$resolved = array();
	$failed = array();
	$missing = array();
	$found = array();
	asort($paths);

	foreach ($paths as $path => $length) {
	foreach ($resolved as $rpath => $root) {
	if (!strncmp($path, $rpath, strlen($rpath))) {
	$resolved[$path] = $root;
	continue 2;
	}
	}
	$config = $path;

	if (basename($config) == '.arcconfig') {
	$resolved[$config] = $config;
	continue;
	}

	$config = rtrim($config, '/');
	$last_config = $config;
	do {
	if (!empty($missing[$config])) {
	break;
	} else if (!empty($found[$config])) {
	$resolved[$path] = $found[$config];
	break;
	}
	list($err) = exec_manual(
	'svnlook cat --transaction %s %s %s',
	$transaction,
	$repository,
	$config ? $config.'/.arcconfig' : '.arcconfig');
	if ($err) {
	$missing[$path] = true;
	} else {
	$resolved[$path] = $config ? $config.'/.arcconfig' : '.arcconfig';
	$found[$config] = $resolved[$path];
	break;
	}
	$config = dirname($config);
	if ($config == '.') {
	$config = '';
	}
	if ($config == $last_config) {
	break;
	}
	$last_config = $config;
	} while (true);

	if (empty($resolved[$path])) {
	$failed[] = $path;
	}
	}

	if ($failed && $resolved) {
	$failed_paths = ' '.implode("\n ", $failed);
	$resolved_paths = ' '.implode("\n ", array_keys($resolved));
	throw new ArcanistUsageException(
	"This commit includes a mixture of files in Arcanist projects and ".
	"outside of Arcanist projects. A commit which affects an Arcanist ".
	"project must affect only that project.\n\n".
	"Files in projects:\n\n".
	$resolved_paths."\n\n".
	"Files not in projects:\n\n".
	$failed_paths);
	}

	if (!$resolved) {
	// None of the affected paths are beneath a .arcconfig file.
	return 0;
	}

	$groups = array();
	foreach ($resolved as $path => $project) {
	$groups[$project][] = $path;
	}
	if (count($groups) > 1) {
	$message = array();
	foreach ($groups as $project => $group) {
	$message[] = "Files underneath '{$project}':\n\n";
	$message[] = " ".implode("\n ", $group)."\n\n";
	}
	$message = implode('', $message);
	throw new ArcanistUsageException(
	"This commit includes a mixture of files from different Arcanist ".
	"projects. A commit which affects an Arcanist project must affect ".
	"only that project.\n\n".
	$message);
	}

	$config_file = key($groups);
	$project_root = dirname($config_file);
	$paths = reset($groups);

	list($config) = execx(
	'svnlook cat --transaction %s %s %s',
	$transaction,
	$repository,
	$config_file);

	$working_copy = ArcanistWorkingCopyIdentity::newFromRootAndConfigFile(
	$project_root,
	$config,
	$config_file." (svnlook: {$transaction} {$repository})");

	$repository_api = new ArcanistSubversionHookAPI(
	$project_root,
	$transaction,
	$repository);

	$lint_engine = $working_copy->getConfig('lint.engine');
	if (!$lint_engine) {
	return 0;
	}

	$engine = newv($lint_engine, array());
	$engine->setWorkingCopy($working_copy);
	$engine->setMinimumSeverity(ArcanistLintSeverity::SEVERITY_ERROR);
	$engine->setPaths($paths);
	$engine->setCommitHookMode(true);
	$engine->setHookAPI($repository_api);

	try {
	$results = $engine->run();
	} catch (ArcanistNoEffectException $no_effect) {
	// Nothing to do, bail out.
	return 0;
	}

	$failures = array();
	foreach ($results as $result) {
	if (!$result->getMessages()) {
	continue;
	}
	$failures[] = $result;
	}

	if ($failures) {
	$at = "@";
	$msg = phutil_console_format(
	"\nLINT ERRORS\n\n".
	"This changeset has lint errors. You must fix all lint errors before ".
	"you can commit.\n\n".
	"You can add '{$at}bypass-lint' to your commit message to disable ".
	"lint checks for this commit, or '{$at}nolint' to the file with ".
	"errors to disable lint for that file.\n\n");
	echo phutil_console_wrap($msg);

	$renderer = new ArcanistLintConsoleRenderer();
	foreach ($failures as $result) {
	echo $renderer->renderLintResult($result);
	}
	return 1;
	}

	return 0;
	}
	}

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