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DiffusionGitBranchQuery.php
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DiffusionGitBranchQuery.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 DiffusionGitBranchQuery extends DiffusionBranchQuery {
protected function executeQuery() {
$drequest = $this->getRequest();
$repository = $drequest->getRepository();
// We need to add 1 in case we pick up HEAD.
$count = $this->getOffset() + $this->getLimit() + 1;
list($stdout) = $repository->execxLocalCommand(
'for-each-ref %C --sort=-creatordate --format=%s refs/remotes',
$count ? '--count='.(int)$count : null,
'%(refname:short) %(objectname)'
);
$branch_list = self::parseGitRemoteBranchOutput(
$stdout,
$only_this_remote = DiffusionBranchInformation::DEFAULT_GIT_REMOTE);
$branches = array();
foreach ($branch_list as $name => $head) {
if (!$repository->shouldTrackBranch($name)) {
continue;
}
$branch = new DiffusionBranchInformation();
$branch->setName($name);
$branch->setHeadCommitIdentifier($head);
$branches[] = $branch;
}
$offset = $this->getOffset();
if ($offset) {
$branches = array_slice($branches, $offset);
}
// We might have too many even after offset slicing, if there was no HEAD
// for some reason.
$limit = $this->getLimit();
if ($limit) {
$branches = array_slice($branches, 0, $limit);
}
return $branches;
}
/**
* Parse the output of 'git branch -r --verbose --no-abbrev' or similar into
* a map. For instance:
*
* array(
* 'origin/master' => '99a9c082f9a1b68c7264e26b9e552484a5ae5f25',
* );
*
* If you specify $only_this_remote, branches will be filtered to only those
* on the given remote, **and the remote name will be stripped**. For example:
*
* array(
* 'master' => '99a9c082f9a1b68c7264e26b9e552484a5ae5f25',
* );
*
* @param string stdout of git branch command.
* @param string Filter branches to those on a specific remote.
* @return map Map of 'branch' or 'remote/branch' to hash at HEAD.
*/
public static function parseGitRemoteBranchOutput(
$stdout,
$only_this_remote = null) {
$map = array();
$lines = array_filter(explode("\n", $stdout));
foreach ($lines as $line) {
$matches = null;
if (preg_match('/^ (\S+)\s+-> (\S+)$/', $line, $matches)) {
// This is a line like:
//
// origin/HEAD -> origin/master
//
// ...which we don't currently do anything interesting with, although
// in theory we could use it to automatically choose the default
// branch.
continue;
}
if (!preg_match('/^ *(\S+)\s+([a-z0-9]{40})/', $line, $matches)) {
throw new Exception("Failed to parse {$line}!");
}
$remote_branch = $matches[1];
$branch_head = $matches[2];
if (strpos($remote_branch, 'HEAD') !== false) {
// let's assume that no one will call their remote or branch HEAD
continue;
}
if ($only_this_remote) {
$matches = null;
if (!preg_match('#^([^/]+)/(.*)$#', $remote_branch, $matches)) {
throw new Exception(
"Failed to parse remote branch '{$remote_branch}'!");
}
$remote_name = $matches[1];
$branch_name = $matches[2];
if ($remote_name != $only_this_remote) {
continue;
}
$map[$branch_name] = $branch_head;
} else {
$map[$remote_branch] = $branch_head;
}
}
return $map;
}
}

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