ArcanistRuntime.php
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ArcanistRuntime.php
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	<?php

	final class ArcanistRuntime {

	private $workflows;
	private $logEngine;
	private $lastInterruptTime;

	private $stack = array();

	private $viewer;
	private $toolset;
	private $hardpointEngine;
	private $symbolEngine;
	private $conduitEngine;
	private $workingCopy;

	public function execute(array $argv) {

	try {
	$this->checkEnvironment();
	} catch (Exception $ex) {
	echo "CONFIGURATION ERROR\n\n";
	echo $ex->getMessage();
	echo "\n\n";
	return 1;
	}

	PhutilTranslator::getInstance()
	->setLocale(PhutilLocale::loadLocale('en_US'))
	->setTranslations(PhutilTranslation::getTranslationMapForLocale('en_US'));

	$log = new ArcanistLogEngine();
	$this->logEngine = $log;

	try {
	return $this->executeCore($argv);
	} catch (ArcanistConduitException $ex) {
	$log->writeError(pht('CONDUIT'), $ex->getMessage());
	} catch (PhutilArgumentUsageException $ex) {
	$log->writeError(pht('USAGE EXCEPTION'), $ex->getMessage());
	} catch (ArcanistUserAbortException $ex) {
	$log->writeError(pht('---'), $ex->getMessage());
	} catch (ArcanistConduitAuthenticationException $ex) {
	$log->writeError($ex->getTitle(), $ex->getBody());
	}

	return 1;
	}

	private function executeCore(array $argv) {
	$log = $this->getLogEngine();

	$config_args = array(
	array(
	'name' => 'library',
	'param' => 'path',
	'help' => pht('Load a library.'),
	'repeat' => true,
	),
	array(
	'name' => 'config',
	'param' => 'key=value',
	'repeat' => true,
	'help' => pht('Specify a runtime configuration value.'),
	),
	array(
	'name' => 'config-file',
	'param' => 'path',
	'repeat' => true,
	'help' => pht(
	'Load one or more configuration files. If this flag is provided, '.
	'the system and user configuration files are ignored.'),
	),
	);

	$args = id(new PhutilArgumentParser($argv))
	->parseStandardArguments();

	// If we can test whether STDIN is a TTY, and it isn't, require that "--"
	// appear in the argument list. This is intended to make it very hard to
	// write unsafe scripts on top of Arcanist.

	if (phutil_is_noninteractive()) {
	$args->setRequireArgumentTerminator(true);
	}

	$is_trace = $args->getArg('trace');
	$log->setShowTraceMessages($is_trace);

	$log->writeTrace(pht('ARGV'), csprintf('%Ls', $argv));

	// We're installing the signal handler after parsing "--trace" so that it
	// can emit debugging messages. This means there's a very small window at
	// startup where signals have no special handling, but we couldn't really
	// route them or do anything interesting with them anyway.
	$this->installSignalHandler();

	$args->parsePartial($config_args, true);

	$config_engine = $this->loadConfiguration($args);
	$config = $config_engine->newConfigurationSourceList();

	$this->loadLibraries($config_engine, $config, $args);

	// Now that we've loaded libraries, we can validate configuration.
	// Do this before continuing since configuration can impact other
	// behaviors immediately and we want to catch any issues right away.
	$config->setConfigOptions($config_engine->newConfigOptionsMap());
	$config->validateConfiguration($this);

	$toolset = $this->newToolset($argv);
	$this->setToolset($toolset);

	$args->parsePartial($toolset->getToolsetArguments());

	$workflows = $this->newWorkflows($toolset);
	$this->workflows = $workflows;

	$conduit_engine = $this->newConduitEngine($config, $args);
	$this->conduitEngine = $conduit_engine;

	$phutil_workflows = array();
	foreach ($workflows as $key => $workflow) {
	$workflow
	->setRuntime($this)
	->setConfigurationEngine($config_engine)
	->setConfigurationSourceList($config)
	->setConduitEngine($conduit_engine);

	$phutil_workflows[$key] = $workflow->newPhutilWorkflow();
	}


	$unconsumed_argv = $args->getUnconsumedArgumentVector();

	if (!$unconsumed_argv) {
	// TOOLSETS: This means the user just ran "arc" or some other top-level
	// toolset without any workflow argument. We should give them a summary
	// of the toolset, a list of workflows, and a pointer to "arc help" for
	// more details.

	// A possible exception is "arc --help", which should perhaps pass
	// through and act like "arc help".
	throw new PhutilArgumentUsageException(pht('Choose a workflow!'));
	}

	$alias_effects = id(new ArcanistAliasEngine())
	->setRuntime($this)
	->setToolset($toolset)
	->setWorkflows($workflows)
	->setConfigurationSourceList($config)
	->resolveAliases($unconsumed_argv);

	foreach ($alias_effects as $alias_effect) {
	if ($alias_effect->getType() === ArcanistAliasEffect::EFFECT_SHELL) {
	return $this->executeShellAlias($alias_effect);
	}
	}

	$result_argv = $this->applyAliasEffects($alias_effects, $unconsumed_argv);

	$args->setUnconsumedArgumentVector($result_argv);

	// TOOLSETS: Some day, stop falling through to the old "arc" runtime.

	$help_workflows = $this->getHelpWorkflows($phutil_workflows);
	$args->setHelpWorkflows($help_workflows);

	try {
	return $args->parseWorkflowsFull($phutil_workflows);
	} catch (ArcanistMissingArgumentTerminatorException $terminator_exception) {
	$log->writeHint(
	pht('USAGE'),
	pht(
	'"%s" is being run noninteractively, but the argument list is '.
	'missing "--" to indicate end of flags.',
	$toolset->getToolsetKey()));

	$log->writeHint(
	pht('USAGE'),
	pht(
	'When running noninteractively, you MUST provide "--" to all '.
	'commands (even if they take no arguments).'));

	$log->writeHint(
	pht('USAGE'),
	tsprintf(
	'%s <__%s__>',
	pht('Learn More:'),
	'https://phurl.io/u/noninteractive'));

	throw new PhutilArgumentUsageException(
	pht('Missing required "--" in argument list.'));
	} catch (PhutilArgumentUsageException $usage_exception) {

	// TODO: This is very, very hacky; we're trying to let errors like
	// "you passed the wrong arguments" through but fall back to classic
	// mode if the workflow itself doesn't exist.
	if (!preg_match('/invalid command/i', $usage_exception->getMessage())) {
	throw $usage_exception;
	}

	}

	$arcanist_root = phutil_get_library_root('arcanist');
	$arcanist_root = dirname($arcanist_root);
	$bin = $arcanist_root.'/scripts/arcanist.php';

	$err = phutil_passthru(
	'php -f %R -- %Ls',
	$bin,
	array_slice($argv, 1));

	return $err;
	}


	/**
	* Perform some sanity checks against the possible diversity of PHP builds in
	* the wild, like very old versions and builds that were compiled with flags
	* that exclude core functionality.
	*/
	private function checkEnvironment() {
	// NOTE: We don't have phutil_is_windows() yet here.
	$is_windows = (DIRECTORY_SEPARATOR != '/');

	// NOTE: There's a hard PHP version check earlier, in "init-script.php".

	if ($is_windows) {
	$need_functions = array(
	'curl_init' => array('builtin-dll', 'php_curl.dll'),
	);
	} else {
	$need_functions = array(
	'curl_init' => array(
	'text',
	"You need to install the cURL PHP extension, maybe with ".
	"'apt-get install php5-curl' or 'yum install php53-curl' or ".
	"something similar.",
	),
	'json_decode' => array('flag', '--without-json'),
	);
	}

	$problems = array();

	$config = null;
	$show_config = false;
	foreach ($need_functions as $fname => $resolution) {
	if (function_exists($fname)) {
	continue;
	}

	static $info;
	if ($info === null) {
	ob_start();
	phpinfo(INFO_GENERAL);
	$info = ob_get_clean();
	$matches = null;
	if (preg_match('/^Configure Command =>\s(.?)$/m', $info, $matches)) {
	$config = $matches[1];
	}
	}

	list($what, $which) = $resolution;

	if ($what == 'flag' && strpos($config, $which) !== false) {
	$show_config = true;
	$problems[] = sprintf(
	'The build of PHP you are running was compiled with the configure '.
	'flag "%s", which means it does not support the function "%s()". '.
	'This function is required for this software to run. Install a '.
	'standard build of PHP or rebuild it without this flag. You may '.
	'also be able to build or install the relevant extension separately.',
	$which,
	$fname);
	continue;
	}

	if ($what == 'builtin-dll') {
	$problems[] = sprintf(
	'The build of PHP you are running does not have the "%s" extension '.
	'enabled. Edit your php.ini file and uncomment the line which '.
	'reads "extension=%s".',
	$which,
	$which);
	continue;
	}

	if ($what == 'text') {
	$problems[] = $which;
	continue;
	}

	$problems[] = sprintf(
	'The build of PHP you are running is missing the required function '.
	'"%s()". Rebuild PHP or install the extension which provides "%s()".',
	$fname,
	$fname);
	}

	if ($problems) {
	if ($show_config) {
	$problems[] = "PHP was built with this configure command:\n\n{$config}";
	}
	$problems = implode("\n\n", $problems);

	throw new Exception($problems);
	}
	}

	private function loadConfiguration(PhutilArgumentParser $args) {
	$engine = id(new ArcanistConfigurationEngine())
	->setArguments($args);

	$working_copy = ArcanistWorkingCopy::newFromWorkingDirectory(getcwd());

	$engine->setWorkingCopy($working_copy);

	$this->workingCopy = $working_copy;

	$working_copy
	->getRepositoryAPI()
	->setRuntime($this);

	return $engine;
	}

	private function loadLibraries(
	ArcanistConfigurationEngine $engine,
	ArcanistConfigurationSourceList $config,
	PhutilArgumentParser $args) {

	$sources = array();

	$cli_libraries = $args->getArg('library');
	if ($cli_libraries) {
	$sources = array();
	foreach ($cli_libraries as $cli_library) {
	$sources[] = array(
	'type' => 'flag',
	'library-source' => $cli_library,
	);
	}
	} else {
	$items = $config->getStorageValueList('load');
	foreach ($items as $item) {
	foreach ($item->getValue() as $library_path) {
	$sources[] = array(
	'type' => 'config',
	'config-source' => $item->getConfigurationSource(),
	'library-source' => $library_path,
	);
	}
	}
	}

	foreach ($sources as $spec) {
	$library_source = $spec['library-source'];

	switch ($spec['type']) {
	case 'flag':
	$description = pht('runtime --library flag');
	break;
	case 'config':
	$config_source = $spec['config-source'];
	$description = pht(
	'Configuration (%s)',
	$config_source->getSourceDisplayName());
	break;
	}

	$this->loadLibrary($engine, $library_source, $description);
	}
	}

	private function loadLibrary(
	ArcanistConfigurationEngine $engine,
	$location,
	$description) {

	// TODO: This is a legacy system that should be replaced with package
	// management.

	$log = $this->getLogEngine();
	$working_copy = $engine->getWorkingCopy();
	if ($working_copy) {
	$working_copy_root = $working_copy->getPath();
	$working_directory = $working_copy->getWorkingDirectory();
	} else {
	$working_copy_root = null;
	$working_directory = getcwd();
	}

	// Try to resolve the library location. We look in several places, in
	// order:
	//
	// 1. Inside the working copy. This is for phutil libraries within the
	// project. For instance "library/src" will resolve to
	// "./library/src" if it exists.
	// 2. In the same directory as the working copy. This allows you to
	// check out a library alongside a working copy and reference it.
	// If we haven't resolved yet, "library/src" will try to resolve to
	// "../library/src" if it exists.
	// 3. Using normal libphutil resolution rules. Generally, this means
	// that it checks for libraries next to libphutil, then libraries
	// in the PHP include_path.
	//
	// Note that absolute paths will just resolve absolutely through rule (1).

	$resolved = false;

	// Check inside the working copy. This also checks absolute paths, since
	// they'll resolve absolute and just ignore the project root.
	if ($working_copy_root !== null) {
	$resolved_location = Filesystem::resolvePath(
	$location,
	$working_copy_root);
	if (Filesystem::pathExists($resolved_location)) {
	$location = $resolved_location;
	$resolved = true;
	}

	// If we didn't find anything, check alongside the working copy.
	if (!$resolved) {
	$resolved_location = Filesystem::resolvePath(
	$location,
	dirname($working_copy_root));
	if (Filesystem::pathExists($resolved_location)) {
	$location = $resolved_location;
	$resolved = true;
	}
	}
	}

	// Look beside "arcanist/". This is rule (3) above.

	if (!$resolved) {
	$arcanist_root = phutil_get_library_root('arcanist');
	$arcanist_root = dirname(dirname($arcanist_root));
	$resolved_location = Filesystem::resolvePath(
	$location,
	$arcanist_root);
	if (Filesystem::pathExists($resolved_location)) {
	$location = $resolved_location;
	$resolved = true;
	}
	}

	$log->writeTrace(
	pht('LOAD'),
	pht('Loading library from "%s"...', $location));

	$error = null;
	try {
	phutil_load_library($location);
	} catch (PhutilLibraryConflictException $ex) {
	if ($ex->getLibrary() != 'arcanist') {
	throw $ex;
	}

	// NOTE: If you are running `arc` against itself, we ignore the library
	// conflict created by loading the local `arc` library (in the current
	// working directory) and continue without loading it.

	// This means we only execute code in the `arcanist/` directory which is
	// associated with the binary you are running, whereas we would normally
	// execute local code.

	// This can make `arc` development slightly confusing if your setup is
	// especially bizarre, but it allows `arc` to be used in automation
	// workflows more easily. For some context, see PHI13.

	$executing_directory = dirname(dirname(__FILE__));

	$log->writeWarn(
	pht('VERY META'),
	pht(
	'You are running one copy of this software (at path "%s") against '.
	'another copy of this software (at path "%s"). Code in the current '.
	'working directory will not be loaded or executed.',
	$executing_directory,
	$working_directory));
	} catch (PhutilBootloaderException $ex) {
	$log->writeError(
	pht('LIBRARY ERROR'),
	pht(
	'Failed to load library at location "%s". This library '.
	'is specified by "%s". Check that the library is up to date.',
	$location,
	$description));

	$prompt = pht('Continue without loading library?');
	if (!phutil_console_confirm($prompt)) {
	throw $ex;
	}
	} catch (Exception $ex) {
	$log->writeError(
	pht('LOAD ERROR'),
	pht(
	'Failed to load library at location "%s". This library is '.
	'specified by "%s". Check that the setting is correct and the '.
	'library is located in the right place.',
	$location,
	$description));

	$prompt = pht('Continue without loading library?');
	if (!phutil_console_confirm($prompt)) {
	throw $ex;
	}
	}
	}

	private function newToolset(array $argv) {
	$binary = basename($argv[0]);

	$toolsets = ArcanistToolset::newToolsetMap();
	if (!isset($toolsets[$binary])) {
	throw new PhutilArgumentUsageException(
	pht(
	'Toolset "%s" is unknown. The binary should be executed so that '.
	'"argv[0]" identifies a supported toolset. Rename the binary or '.
	'install the library that provides the desired toolset. Current '.
	'available toolsets: %s.',
	$binary,
	implode(', ', array_keys($toolsets))));
	}

	return $toolsets[$binary];
	}

	private function newWorkflows(ArcanistToolset $toolset) {
	$workflows = id(new PhutilClassMapQuery())
	->setAncestorClass('ArcanistWorkflow')
	->setContinueOnFailure(true)
	->execute();

	foreach ($workflows as $key => $workflow) {
	if (!$workflow->supportsToolset($toolset)) {
	unset($workflows[$key]);
	}
	}

	$map = array();
	foreach ($workflows as $workflow) {
	$key = $workflow->getWorkflowName();
	if (isset($map[$key])) {
	throw new Exception(
	pht(
	'Two workflows ("%s" and "%s") both have the same name ("%s") '.
	'and both support the current toolset ("%s", "%s"). Each '.
	'workflow in a given toolset must have a unique name.',
	get_class($workflow),
	get_class($map[$key]),
	$key,
	get_class($toolset),
	$toolset->getToolsetKey()));
	}
	$map[$key] = id(clone $workflow)
	->setToolset($toolset);
	}

	return $map;
	}

	public function getWorkflows() {
	return $this->workflows;
	}

	public function getLogEngine() {
	return $this->logEngine;
	}

	private function applyAliasEffects(array $effects, array $argv) {
	assert_instances_of($effects, 'ArcanistAliasEffect');

	$log = $this->getLogEngine();

	$command = null;
	$arguments = null;
	foreach ($effects as $effect) {
	$message = $effect->getMessage();

	if ($message !== null) {
	$log->writeHint(pht('ALIAS'), $message);
	}

	if ($effect->getCommand()) {
	$command = $effect->getCommand();
	$arguments = $effect->getArguments();
	}
	}

	if ($command !== null) {
	$argv = array_merge(array($command), $arguments);
	}

	return $argv;
	}

	private function installSignalHandler() {
	$log = $this->getLogEngine();

	if (!function_exists('pcntl_signal')) {
	$log->writeTrace(
	pht('PCNTL'),
	pht(
	'Unable to install signal handler, pcntl_signal() unavailable. '.
	'Continuing without signal handling.'));
	return;
	}

	// NOTE: SIGHUP, SIGTERM and SIGWINCH are handled by "PhutilSignalRouter".
	// This logic is largely similar to the logic there, but more specific to
	// Arcanist workflows.

	pcntl_signal(SIGINT, array($this, 'routeSignal'));
	}

	public function routeSignal($signo) {
	switch ($signo) {
	case SIGINT:
	$this->routeInterruptSignal($signo);
	break;
	}
	}

	private function routeInterruptSignal($signo) {
	$log = $this->getLogEngine();

	$last_interrupt = $this->lastInterruptTime;
	$now = microtime(true);
	$this->lastInterruptTime = $now;

	$should_exit = false;

	// If we received another SIGINT recently, always exit. This implements
	// "press ^C twice in quick succession to exit" regardless of what the
	// workflow may decide to do.
	$interval = 2;
	if ($last_interrupt !== null) {
	if ($now - $last_interrupt < $interval) {
	$should_exit = true;
	}
	}

	$handler = null;
	if (!$should_exit) {

	// Look for an interrupt handler in the current workflow stack.

	$stack = $this->getWorkflowStack();
	foreach ($stack as $workflow) {
	if ($workflow->canHandleSignal($signo)) {
	$handler = $workflow;
	break;
	}
	}

	// If no workflow in the current execution stack can handle an interrupt
	// signal, just exit on the first interrupt.

	if (!$handler) {
	$should_exit = true;
	}
	}

	// It's common for users to ^C on prompts. Write a newline before writing
	// a response to the interrupt so the behavior is a little cleaner. This
	// also avoids lines that read "^C [ INTERRUPT ] ...".
	$log->writeNewline();

	if ($should_exit) {
	$log->writeHint(
	pht('INTERRUPT'),
	pht('Interrupted by SIGINT (^C).'));
	exit(128 + $signo);
	}

	$log->writeHint(
	pht('INTERRUPT'),
	pht('Press ^C again to exit.'));

	$handler->handleSignal($signo);
	}

	public function pushWorkflow(ArcanistWorkflow $workflow) {
	$this->stack[] = $workflow;
	return $this;
	}

	public function popWorkflow() {
	if (!$this->stack) {
	throw new Exception(pht('Trying to pop an empty workflow stack!'));
	}

	return array_pop($this->stack);
	}

	public function getWorkflowStack() {
	return $this->stack;
	}

	public function getCurrentWorkflow() {
	return last($this->stack);
	}

	private function newConduitEngine(
	ArcanistConfigurationSourceList $config,
	PhutilArgumentParser $args) {

	try {
	$force_uri = $args->getArg('conduit-uri');
	} catch (PhutilArgumentSpecificationException $ex) {
	$force_uri = null;
	}

	try {
	$force_token = $args->getArg('conduit-token');
	} catch (PhutilArgumentSpecificationException $ex) {
	$force_token = null;
	}

	if ($force_uri !== null) {
	$conduit_uri = $force_uri;
	} else {
	$conduit_uri = $config->getConfig('phabricator.uri');
	if ($conduit_uri === null) {
	// For now, read this older config from raw storage. There is currently
	// no definition of this option in the "toolsets" config list, and it
	// would be nice to get rid of it.
	$default_list = $config->getStorageValueList('default');
	if ($default_list) {
	$conduit_uri = last($default_list)->getValue();
	}
	}
	}

	if ($conduit_uri) {
	// Set the URI path to '/api/'. TODO: Originally, I contemplated letting
	// you deploy Phabricator somewhere other than the domain root, but ended
	// up never pursuing that. We should get rid of all "/api/" silliness
	// in things users are expected to configure. This is already happening
	// to some degree, e.g. "arc install-certificate" does it for you.
	$conduit_uri = new PhutilURI($conduit_uri);
	$conduit_uri->setPath('/api/');
	$conduit_uri = phutil_string_cast($conduit_uri);
	}

	$engine = new ArcanistConduitEngine();

	if ($conduit_uri !== null) {
	$engine->setConduitURI($conduit_uri);
	}

	// TODO: This isn't using "getConfig()" because we aren't defining a
	// real config entry for the moment.

	if ($force_token !== null) {
	$conduit_token = $force_token;
	} else {
	$hosts = array();

	$hosts_list = $config->getStorageValueList('hosts');
	foreach ($hosts_list as $hosts_config) {
	$hosts += $hosts_config->getValue();
	}

	$host_config = idx($hosts, $conduit_uri, array());
	$conduit_token = idx($host_config, 'token');
	}

	if ($conduit_token !== null) {
	$engine->setConduitToken($conduit_token);
	}

	return $engine;
	}

	private function executeShellAlias(ArcanistAliasEffect $effect) {
	$log = $this->getLogEngine();

	$message = $effect->getMessage();
	if ($message !== null) {
	$log->writeHint(pht('SHELL ALIAS'), $message);
	}

	return phutil_passthru('%Ls', $effect->getArguments());
	}

	public function getSymbolEngine() {
	if ($this->symbolEngine === null) {
	$this->symbolEngine = $this->newSymbolEngine();
	}
	return $this->symbolEngine;
	}

	private function newSymbolEngine() {
	return id(new ArcanistSymbolEngine())
	->setWorkflow($this);
	}

	public function getHardpointEngine() {
	if ($this->hardpointEngine === null) {
	$this->hardpointEngine = $this->newHardpointEngine();
	}
	return $this->hardpointEngine;
	}

	private function newHardpointEngine() {
	$engine = new ArcanistHardpointEngine();

	$queries = ArcanistRuntimeHardpointQuery::getAllQueries();

	foreach ($queries as $key => $query) {
	$queries[$key] = id(clone $query)
	->setRuntime($this);
	}

	$engine->setQueries($queries);

	return $engine;
	}

	public function getViewer() {
	if (!$this->viewer) {
	$viewer = $this->getSymbolEngine()
	->loadUserForSymbol('viewer()');

	// TODO: Deal with anonymous stuff.
	if (!$viewer) {
	throw new Exception(pht('No viewer!'));
	}

	$this->viewer = $viewer;
	}

	return $this->viewer;
	}

	public function loadHardpoints($objects, $requests) {
	if (!is_array($objects)) {
	$objects = array($objects);
	}

	if (!is_array($requests)) {
	$requests = array($requests);
	}

	$engine = $this->getHardpointEngine();

	$requests = $engine->requestHardpoints(
	$objects,
	$requests);

	// TODO: Wait for only the required requests.
	$engine->waitForRequests(array());
	}

	public function getWorkingCopy() {
	return $this->workingCopy;
	}

	public function getConduitEngine() {
	return $this->conduitEngine;
	}

	public function setToolset($toolset) {
	$this->toolset = $toolset;
	return $this;
	}

	public function getToolset() {
	return $this->toolset;
	}

	private function getHelpWorkflows(array $workflows) {
	if ($this->getToolset()->getToolsetKey() === 'arc') {
	$legacy = array();

	$legacy[] = new ArcanistCloseRevisionWorkflow();
	$legacy[] = new ArcanistCommitWorkflow();
	$legacy[] = new ArcanistCoverWorkflow();
	$legacy[] = new ArcanistDiffWorkflow();
	$legacy[] = new ArcanistExportWorkflow();
	$legacy[] = new ArcanistGetConfigWorkflow();
	$legacy[] = new ArcanistSetConfigWorkflow();
	$legacy[] = new ArcanistInstallCertificateWorkflow();
	$legacy[] = new ArcanistLintersWorkflow();
	$legacy[] = new ArcanistLintWorkflow();
	$legacy[] = new ArcanistListWorkflow();
	$legacy[] = new ArcanistPatchWorkflow();
	$legacy[] = new ArcanistPasteWorkflow();
	$legacy[] = new ArcanistTasksWorkflow();
	$legacy[] = new ArcanistTodoWorkflow();
	$legacy[] = new ArcanistUnitWorkflow();
	$legacy[] = new ArcanistWhichWorkflow();

	foreach ($legacy as $workflow) {
	// If this workflow has been updated but not removed from the list
	// above yet, just skip it.
	if ($workflow instanceof ArcanistArcWorkflow) {
	continue;
	}

	$workflows[] = $workflow->newLegacyPhutilWorkflow();
	}
	}

	return $workflows;
	}

	}

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