ArcanistAlias.php
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	<?php

	final class ArcanistAlias extends Phobject {

	private $toolset;
	private $trigger;
	private $command;
	private $exception;
	private $configurationSource;

	public static function newFromConfig($key, $value) {
	$alias = new self();

	// Parse older style aliases which were always for the "arc" toolset.
	// When we next write these back into the config file, we'll update them
	// to the modern format.

	// The old format looked like this:
	//
	// {
	// "draft": ["diff", "--draft"]
	// }
	//
	// The new format looks like this:
	//
	// {
	// [
	// "toolset": "arc",
	// "trigger": "draft",
	// "command": ["diff", "--draft"]
	// ]
	// }
	//
	// For now, we parse the older format and fill in the toolset as "arc".

	$is_list = false;
	$is_dict = false;
	if ($value && is_array($value)) {
	if (phutil_is_natural_list($value)) {
	$is_list = true;
	} else {
	$is_dict = true;
	}
	}

	if ($is_list) {
	$alias->trigger = $key;
	$alias->toolset = 'arc';
	$alias->command = $value;
	} else if ($is_dict) {
	try {
	PhutilTypeSpec::checkMap(
	$value,
	array(
	'trigger' => 'string',
	'toolset' => 'string',
	'command' => 'list<string>',
	));

	$alias->trigger = idx($value, 'trigger');
	$alias->toolset = idx($value, 'toolset');
	$alias->command = idx($value, 'command');
	} catch (PhutilTypeCheckException $ex) {
	$alias->exception = new PhutilProxyException(
	pht(
	'Found invalid alias definition (with key "%s").',
	$key),
	$ex);
	}
	} else {
	$alias->exception = new Exception(
	pht(
	'Expected alias definition (with key "%s") to be a dictionary.',
	$key));
	}

	return $alias;
	}

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

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

	public function setTrigger($trigger) {
	$this->trigger = $trigger;
	return $this;
	}

	public function getTrigger() {
	return $this->trigger;
	}

	public function setCommand(array $command) {
	$this->command = $command;
	return $this;
	}

	public function getCommand() {
	return $this->command;
	}

	public function setException(Exception $exception) {
	$this->exception = $exception;
	return $this;
	}

	public function getException() {
	return $this->exception;
	}

	public function isShellCommandAlias() {
	$command = $this->getCommand();
	if (!$command) {
	return false;
	}

	$head = head($command);
	return preg_match('/^!/', $head);
	}

	public function getStorageDictionary() {
	return array(
	'trigger' => $this->getTrigger(),
	'toolset' => $this->getToolset(),
	'command' => $this->getCommand(),
	);
	}

	public function setConfigurationSource(
	ArcanistConfigurationSource $configuration_source) {
	$this->configurationSource = $configuration_source;
	return $this;
	}

	public function getConfigurationSource() {
	return $this->configurationSource;
	}

	}

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