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phorge/src/applications/diffusion/query/lowlevel/DiffusionLowLevelCommitQuery.php
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DiffusionLowLevelCommitQuery.php
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<?php
/**
* Populate a @{class:DiffusionCommitRef} with information about a specific
* commit in a repository. This is a low-level query which talks directly to
* the underlying VCS.
*/
final class DiffusionLowLevelCommitQuery
extends DiffusionLowLevelQuery {
private $identifier;
public function withIdentifier($identifier) {
$this->identifier = $identifier;
return $this;
}
protected function executeQuery() {
if (!strlen($this->identifier)) {
throw new PhutilInvalidStateException('withIdentifier');
}
$type = $this->getRepository()->getVersionControlSystem();
switch ($type) {
case PhabricatorRepositoryType::REPOSITORY_TYPE_GIT:
$result = $this->loadGitCommitRef();
break;
case PhabricatorRepositoryType::REPOSITORY_TYPE_MERCURIAL:
$result = $this->loadMercurialCommitRef();
break;
case PhabricatorRepositoryType::REPOSITORY_TYPE_SVN:
$result = $this->loadSubversionCommitRef();
break;
default:
throw new Exception(pht('Unsupported repository type "%s"!', $type));
}
return $result;
}
private function loadGitCommitRef() {
$repository = $this->getRepository();
// See T5028. The "%B" (raw body) mode is not present in very old versions
// of Git. Use "%s" and "%b" ("subject" and "wrapped body") as an
// approximation.
$git_binary = PhutilBinaryAnalyzer::getForBinary('git');
$git_version = $git_binary->getBinaryVersion();
if (version_compare($git_version, '1.7.2', '>=')) {
$body_format = '%B';
$split_body = false;
} else {
$body_format = '%s%x00%b';
$split_body = true;
}
$argv = array();
$argv[] = '-n';
$argv[] = '1';
$argv[] = '--encoding=UTF-8';
$argv[] = sprintf(
'--format=%s',
implode(
'%x00',
array(
'%e',
'%cn',
'%ce',
'%an',
'%ae',
'%T',
'%at',
$body_format,
// The "git log" output includes a trailing newline. We want to
// faithfully capture only the exact text of the commit message,
// so include an explicit terminator: this makes sure the exact
// body text is surrounded by "\0" characters.
'~',
)));
// Even though we pass --encoding here, git doesn't always succeed, so
// we try a little harder, since git *does* tell us what the actual encoding
// is correctly (unless it doesn't; encoding is sometimes empty).
list($info) = $repository->execxLocalCommand(
'log -n 1 %Ls %s --',
$argv,
gitsprintf('%s', $this->identifier));
$parts = explode("\0", $info);
$encoding = array_shift($parts);
foreach ($parts as $key => $part) {
if ($encoding) {
$part = phutil_utf8_convert($part, 'UTF-8', $encoding);
}
$parts[$key] = phutil_utf8ize($part);
if (!strlen($parts[$key])) {
$parts[$key] = null;
}
}
$hashes = array(
id(new DiffusionCommitHash())
->setHashType(ArcanistDifferentialRevisionHash::HASH_GIT_COMMIT)
->setHashValue($this->identifier),
id(new DiffusionCommitHash())
->setHashType(ArcanistDifferentialRevisionHash::HASH_GIT_TREE)
->setHashValue($parts[4]),
);
$author_epoch = (int)$parts[5];
if (!$author_epoch) {
$author_epoch = null;
}
if ($split_body) {
// Here, the body is: "subject", "\0", "wrapped body". Stitch the
// pieces back together by putting a newline between them if both
// parts are nonempty.
$head = $parts[6];
$tail = $parts[7];
if (phutil_nonempty_string($head) && phutil_nonempty_string($tail)) {
$body = $head."\n\n".$tail;
} else if (phutil_nonempty_string($head)) {
$body = $head;
} else if (phutil_nonempty_string($tail)) {
$body = $tail;
} else {
$body = '';
}
} else {
// Here, the body is the raw unwrapped body.
$body = $parts[6];
}
return id(new DiffusionCommitRef())
->setCommitterName($parts[0])
->setCommitterEmail($parts[1])
->setAuthorName($parts[2])
->setAuthorEmail($parts[3])
->setHashes($hashes)
->setAuthorEpoch($author_epoch)
->setMessage($body);
}
private function loadMercurialCommitRef() {
$repository = $this->getRepository();
list($stdout) = $repository->execxLocalCommand(
'log --template %s --rev %s',
'{author}\\n{desc}',
hgsprintf('%s', $this->identifier));
list($author, $message) = explode("\n", $stdout, 2);
$author = phutil_utf8ize($author);
$message = phutil_utf8ize($message);
list($author_name, $author_email) = $this->splitUserIdentifier($author);
$hashes = array(
id(new DiffusionCommitHash())
->setHashType(ArcanistDifferentialRevisionHash::HASH_MERCURIAL_COMMIT)
->setHashValue($this->identifier),
);
return id(new DiffusionCommitRef())
->setAuthorName($author_name)
->setAuthorEmail($author_email)
->setMessage($message)
->setHashes($hashes);
}
private function loadSubversionCommitRef() {
$repository = $this->getRepository();
list($xml) = $repository->execxRemoteCommand(
'log --xml --limit 1 %s',
$repository->getSubversionPathURI(null, $this->identifier));
// Subversion may send us back commit messages which won't parse because
// they have non UTF-8 garbage in them. Slam them into valid UTF-8.
$xml = phutil_utf8ize($xml);
$log = new SimpleXMLElement($xml);
$entry = $log->logentry[0];
$author = (string)$entry->author;
$message = (string)$entry->msg;
list($author_name, $author_email) = $this->splitUserIdentifier($author);
// No hashes in Subversion.
$hashes = array();
return id(new DiffusionCommitRef())
->setAuthorName($author_name)
->setAuthorEmail($author_email)
->setMessage($message)
->setHashes($hashes);
}
private function splitUserIdentifier($user) {
$email = new PhutilEmailAddress($user);
if ($email->getDisplayName() || $email->getDomainName()) {
$user_name = $email->getDisplayName();
$user_email = $email->getAddress();
} else {
$user_name = $email->getAddress();
$user_email = null;
}
return array($user_name, $user_email);
}
}

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