ConduitAPI_diffusion_existsquery_Method.php
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	<?php

	final class ConduitAPI_diffusion_existsquery_Method
	extends ConduitAPI_diffusion_abstractquery_Method {

	public function getMethodDescription() {
	return 'Determine if code exists in a version control system.';
	}

	public function defineReturnType() {
	return 'bool';
	}

	protected function defineCustomParamTypes() {
	return array(
	'commit' => 'required string'
	);
	}

	protected function getGitResult(ConduitAPIRequest $request) {
	$repository = $this->getDiffusionRequest()->getRepository();
	$commit = $request->getValue('commit');
	list($err, $merge_base) = $repository->execLocalCommand(
	'cat-file -t %s',
	$commit);
	return !$err;
	}

	protected function getSVNResult(ConduitAPIRequest $request) {
	$repository = $this->getDiffusionRequest()->getRepository();
	$commit = $request->getValue('commit');
	list($info) = $repository->execxRemoteCommand(
	'info %s',
	$repository->getRemoteURI());
	$exists = false;
	$matches = null;
	if (preg_match('/^Revision: (\d+)$/m', $info, $matches)) {
	$base_revision = $matches[1];
	$exists = $base_revision >= $commit;
	}
	return $exists;
	}

	protected function getMercurialResult(ConduitAPIRequest $request) {
	$repository = $this->getDiffusionRequest()->getRepository();
	$commit = $request->getValue('commit');
	list($err, $stdout) = $repository->execLocalCommand(
	'id --rev %s',
	$commit);
	return !$err;
	}

	}