/**
* Returns incremental process output (even if empty string) or false if the process has finished
* successfully and all output was already returned.
*
* @throws Symfony_Process_Exception_ProcessFailedException If the process did not exit successfully.
*
* @internal
*
* @return string|false
*/
public function getIncrementalOutput()
{
if (!$this->ran) {
$this->ran = true;
try {
$this->process->start();
} catch (Symfony_Process_Exception_ExceptionInterface $e) {
throw new Symfony_Process_Exception_ProcessFailedException($this->process);
}
}
if ($this->process->isRunning()) {
$output = $this->process->getIncrementalOutput();
$this->process->clearOutput();
if (strlen($output) < Symfony_Process_Pipes_PipesInterface::CHUNK_SIZE) {
// Don't hog the processor while waiting for incremental process output.
usleep(100000);
}
// The stream will be read again because we're returning a string.
return (string) $output;
} else {
if (!$this->process->isSuccessful()) {
throw new Symfony_Process_Exception_ProcessFailedException($this->process);
}
$output = $this->process->getIncrementalOutput();
$this->process->clearOutput();
// The process has finished and is successful. This part will probably get run twice,
// first time we'll return final output, second time we'll return 'false' and break the loop.
return strlen($output) ? $output : false;
}
}
/**
* {@inheritdoc}
*/
public function start($callback = null)
{
if (null === $this->getCommandLine()) {
throw new Symfony_Process_Exception_RuntimeException('Unable to find the PHP executable.');
}
parent::start($callback);
}
private function backupRootFiles($compressionLevel, $backupFile, $exclude)
{
$zip = mwp_container()->getExecutableFinder()->find('zip', 'zip');
$arguments = array($zip, '-q', '-j', '-' . $compressionLevel, $backupFile);
$fileExclusions = array('../', 'error_log');
foreach ($exclude as $exclusion) {
if (is_file(ABSPATH . $exclusion)) {
$fileExclusions[] = $exclusion;
}
}
$parentWpConfig = '';
if (!file_exists(ABSPATH . 'wp-config.php') && file_exists(dirname(ABSPATH) . '/wp-config.php') && !file_exists(dirname(ABSPATH) . '/wp-settings.php')) {
$parentWpConfig = '../wp-config.php';
}
$command = implode(' ', array_map(array('Symfony_Process_ProcessUtils', 'escapeArgument'), $arguments)) . " .* ./* {$parentWpConfig}";
if ($fileExclusions) {
$command .= ' ' . implode(' ', array_map(array('Symfony_Process_ProcessUtils', 'escapeArgument'), array_merge(array('-x'), $fileExclusions)));
}
try {
if (!mwp_is_shell_available()) {
throw new MMB_Exception("Shell is not available");
}
$process = new Symfony_Process_Process($command, untrailingslashit(ABSPATH), null, null, 3600);
mwp_logger()->debug('Root files compression process started', array('executable_location' => $zip, 'command_line' => $process->getCommandLine()));
$process->start();
while ($process->isRunning()) {
sleep(1);
echo " ";
flush();
mwp_logger()->debug('Compressing...');
}
if ($process->isSuccessful()) {
mwp_logger()->info('Root files compression process finished');
} elseif ($process->getExitCode() === 18) {
mwp_logger()->notice('Root files compression process finished with warnings; some files could not be read', array('process' => $process));
} else {
throw new Symfony_Process_Exception_ProcessFailedException($process);
}
} catch (Symfony_Process_Exception_ProcessFailedException $e) {
mwp_logger()->error('Root files compression process failed', array('process' => $e->getProcess()));
throw $e;
} catch (Exception $e) {
mwp_logger()->error('Error while trying to execute root files compression process', array('exception' => $e));
throw $e;
}
}