ArcanistDifferentialCommitMessage.php
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	<?php

	/**
	* Represents a parsed commit message.
	*/
	final class ArcanistDifferentialCommitMessage extends Phobject {

	private $rawCorpus;
	private $revisionID;
	private $fields = array();

	private $gitSVNBaseRevision;
	private $gitSVNBasePath;
	private $gitSVNUUID;

	public static function newFromRawCorpus($corpus) {
	$obj = new ArcanistDifferentialCommitMessage();
	$obj->rawCorpus = $corpus;
	$obj->revisionID = $obj->parseRevisionIDFromRawCorpus($corpus);

	$pattern = '/^git-svn-id:\s([^@]+)@(\d+)\s+(.)$/m';
	$match = null;
	if (preg_match($pattern, $corpus, $match)) {
	$obj->gitSVNBaseRevision = $match[1].'@'.$match[2];
	$obj->gitSVNBasePath = $match[1];
	$obj->gitSVNUUID = $match[3];
	}

	return $obj;
	}

	public function getRawCorpus() {
	return $this->rawCorpus;
	}

	public function getRevisionID() {
	return $this->revisionID;
	}

	public function pullDataFromConduit(
	ConduitClient $conduit,
	$partial = false) {

	$result = $conduit->callMethodSynchronous(
	'differential.parsecommitmessage',
	array(
	'corpus' => $this->rawCorpus,
	'partial' => $partial,
	));

	$this->fields = $result['fields'];

	if (!empty($result['errors'])) {
	throw new ArcanistDifferentialCommitMessageParserException(
	$result['errors']);
	}

	return $this;
	}

	public function getFieldValue($key) {
	if (array_key_exists($key, $this->fields)) {
	return $this->fields[$key];
	}
	return null;
	}

	public function setFieldValue($key, $value) {
	$this->fields[$key] = $value;
	return $this;
	}

	public function getFields() {
	return $this->fields;
	}

	public function getGitSVNBaseRevision() {
	return $this->gitSVNBaseRevision;
	}

	public function getGitSVNBasePath() {
	return $this->gitSVNBasePath;
	}

	public function getGitSVNUUID() {
	return $this->gitSVNUUID;
	}

	public function getChecksum() {
	$fields = array_filter($this->fields);
	ksort($fields);
	$fields = json_encode($fields);
	return md5($fields);
	}

	/**
	* Extract the revision ID from a commit message.
	*
	* @param string Raw commit message.
	* @return int\|null Revision ID, if the commit message contains one.
	*/
	private function parseRevisionIDFromRawCorpus($corpus) {
	$match = null;
	if (!preg_match('/^Differential Revision:\s*(.+)/im', $corpus, $match)) {
	return null;
	}

	$revision_value = trim($match[1]);
	$revision_pattern = '/^[dD]([1-9]\d*)\z/';

	// Accept a bare revision ID like "D123".
	if (preg_match($revision_pattern, $revision_value, $match)) {
	return (int)$match[1];
	}

	// Otherwise, try to find a full URI.
	$uri = new PhutilURI($revision_value);
	$path = $uri->getPath();
	$path = trim($path, '/');
	if (preg_match($revision_pattern, $path, $match)) {
	return (int)$match[1];
	}

	throw new ArcanistUsageException(
	pht(
	'Invalid "Differential Revision" field in commit message. This field '.
	'should have a revision identifier like "%s" or a Phabricator URI '.
	'like "%s", but has "%s".',
	'D123',
	'https://phabricator.example.com/D123',
	$revision_value));
	}

	}

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