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ExecuteCommandTrait.php

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<?php

/**

* Copyright 2016 Google 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.

*/

namespace Google\Cloud\TestUtils;

use Symfony\Component\Process\Process;

trait ExecuteCommandTrait

{

private static $workingDirectory;

private static $logger;

public static function setWorkingDirectory($workingDirectory)

{

self::$workingDirectory = $workingDirectory;

}

/**

* run a command

*

* @param $cmd

* @throws \Exception

*/

public static function execute($cmd)

{

$process = self::createProcess($cmd);

self::executeProcess($process);

return $process->getOutput();

}

/**

* Executes a Process and throws an exception

*

* @param Process $process

* @param bool $throwExceptionOnFailure

* @throws \Exception

*/

private static function executeProcess(Process $process, $throwExceptionOnFailure = true)

{

if (self::$logger) {

self::$logger->debug(sprintf('Executing: %s', $process->getCommandLine()));

}

$process->run(self::getCallback());

if (!$process->isSuccessful() && $throwExceptionOnFailure) {

$output = $process->getErrorOutput() ? $process->getErrorOutput() : $process->getOutput();

$msg = sprintf('Error executing "%s": %s', $process->getCommandLine(), $output);

throw new \Exception($msg);

}

return $process->isSuccessful();

}

/**

* @return Process

*/

private static function createProcess($cmd)

{

$process = new Process($cmd);

$process->setWorkingDirectory(self::$workingDirectory);

return $process;

}

private static function getCallback()

{

if (self::$logger) {

$logger = self::$logger;

return function ($type, $line) use ($logger) {

if ($type === 'err') {

$logger->error($line);

} else {

$logger->debug($line);

}

};

}

}

}