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DiffusionGitDiffQuery.php
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DiffusionGitDiffQuery.php
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<?php
/*
* Copyright 2011 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 DiffusionGitDiffQuery extends DiffusionDiffQuery {
protected function executeQuery() {
$drequest = $this->getRequest();
$repository = $drequest->getRepository();
if (!$drequest->getRawCommit()) {
$effective_commit = $this->getEffectiveCommit();
if (!$effective_commit) {
return null;
}
// TODO: This side effect is kind of skethcy.
$drequest->setCommit($effective_commit);
} else {
$effective_commit = $drequest->getCommit();
}
$options = array(
'-M',
'-C',
'--no-ext-diff',
'--no-color',
'--src-prefix=a/',
'--dst-prefix=b/',
'-U65535',
);
$options = implode(' ', $options);
try {
list($raw_diff) = execx(
"(cd %s && git diff %C %s^ %s -- %s)",
$repository->getDetail('local-path'),
$options,
$effective_commit,
$effective_commit,
$drequest->getPath());
} catch (CommandException $ex) {
// Check if this is the root commit by seeing if it has parents.
list($parents) = execx(
'(cd %s && git log --format=%s %s --)',
$repository->getDetail('local-path'),
'%P', // "parents"
$effective_commit);
if (!strlen(trim($parents))) {
// No parents means we're looking at the root revision. Diff against
// the empty tree hash instead, since there is no parent so "^" does
// not work. See ArcanistGitAPI for more discussion.
list($raw_diff) = execx(
'(cd %s && git diff %C %s %s -- %s)',
$repository->getDetail('local-path'),
$options,
ArcanistGitAPI::GIT_MAGIC_ROOT_COMMIT,
$effective_commit,
$drequest->getPath());
} else {
throw $ex;
}
}
$parser = new ArcanistDiffParser();
$parser->setDetectBinaryFiles(true);
$changes = $parser->parseDiff($raw_diff);
$diff = DifferentialDiff::newFromRawChanges($changes);
$changesets = $diff->getChangesets();
$changeset = reset($changesets);
$this->renderingReference =
$drequest->getBranchURIComponent($drequest->getBranch()).
$drequest->getPath().';'.
$drequest->getCommit();
return $changeset;
}
}

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