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phab/src/applications/repository/daemon/commitdiscovery/git/PhabricatorRepositoryGitCommitDiscoveryDaemon.php
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PhabricatorRepositoryGitCommitDiscoveryDaemon.php
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<?php
/*
* Copyright 2012 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
final class PhabricatorRepositoryGitCommitDiscoveryDaemon
extends PhabricatorRepositoryCommitDiscoveryDaemon {
protected function discoverCommits() {
// NOTE: PhabricatorRepositoryGitFetchDaemon does the actual pulls, this
// just parses HEAD.
$repository = $this->getRepository();
$vcs = $repository->getVersionControlSystem();
if ($vcs != PhabricatorRepositoryType::REPOSITORY_TYPE_GIT) {
throw new Exception("Repository is not a git repository.");
}
list($remotes) = $repository->execxLocalCommand(
'remote show -n origin');
$matches = null;
if (!preg_match('/^\s*Fetch URL:\s*(.*?)\s*$/m', $remotes, $matches)) {
throw new Exception(
"Expected 'Fetch URL' in 'git remote show -n origin'.");
}
self::verifySameGitOrigin(
$matches[1],
$repository->getRemoteURI(),
$repository->getLocalPath());
list($stdout) = $repository->execxLocalCommand(
'branch -r --verbose --no-abbrev');
$branches = DiffusionGitBranchQuery::parseGitRemoteBranchOutput(
$stdout,
$only_this_remote = DiffusionBranchInformation::DEFAULT_GIT_REMOTE);
$got_something = false;
$tracked_something = false;
foreach ($branches as $name => $commit) {
if (!$repository->shouldTrackBranch($name)) {
continue;
}
$tracked_something = true;
if ($this->isKnownCommit($commit)) {
continue;
} else {
$this->discoverCommit($commit);
$got_something = true;
}
}
if (!$tracked_something) {
$repo_name = $repository->getName();
$repo_callsign = $repository->getCallsign();
throw new Exception(
"Repository r{$repo_callsign} '{$repo_name}' has no tracked branches! ".
"Verify that your branch filtering settings are correct.");
}
return $got_something;
}
private function discoverCommit($commit) {
$discover = array();
$insert = array();
$repository = $this->getRepository();
$discover[] = $commit;
$insert[] = $commit;
$seen_parent = array();
while (true) {
$target = array_pop($discover);
list($parents) = $repository->execxLocalCommand(
'log -n1 --pretty="%%P" %s',
$target);
$parents = array_filter(explode(' ', trim($parents)));
foreach ($parents as $parent) {
if (isset($seen_parent[$parent])) {
// We end up in a loop here somehow when we parse Arcanist if we
// don't do this. TODO: Figure out why and draw a pretty diagram
// since it's not evident how parsing a DAG with this causes the
// loop to stop terminating.
continue;
}
$seen_parent[$parent] = true;
if (!$this->isKnownCommit($parent)) {
$discover[] = $parent;
$insert[] = $parent;
}
}
if (empty($discover)) {
break;
}
$this->stillWorking();
}
while (true) {
$target = array_pop($insert);
list($epoch) = $repository->execxLocalCommand(
'log -n1 --pretty="%%at" %s',
$target);
$epoch = trim($epoch);
$this->recordCommit($target, $epoch);
if (empty($insert)) {
break;
}
}
}
public static function verifySameGitOrigin($remote, $expect, $where) {
$remote_uri = PhabricatorRepository::newPhutilURIFromGitURI($remote);
$expect_uri = PhabricatorRepository::newPhutilURIFromGitURI($expect);
$remote_path = $remote_uri->getPath();
$expect_path = $expect_uri->getPath();
$remote_match = self::normalizeGitPath($remote_path);
$expect_match = self::normalizeGitPath($expect_path);
if ($remote_match != $expect_match) {
throw new Exception(
"Working copy at '{$where}' has a mismatched origin URL. It has ".
"origin URL '{$remote}' (with remote path '{$remote_path}'), but the ".
"configured URL '{$expect}' (with remote path '{$expect_path}') is ".
"expected. Refusing to proceed because this may indicate that the ".
"working copy is actually some other repository.");
}
}
private static function normalizeGitPath($path) {
// Strip away trailing "/" and ".git", so similar paths correctly match.
$path = rtrim($path, '/');
$path = preg_replace('/\.git$/', '', $path);
return $path;
}
}
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