|null> */ private array $resolved = []; public function available(): bool { if (!function_exists('proc_open')) { return false; } $disabled = array_map('trim', explode(',', (string) ini_get('disable_functions'))); return !in_array('proc_open', $disabled, true); } /** * @param list $command * * @return array{ok: bool, exit: int, output: string} */ public function run(array $command, string $cwd, int $timeout = 300): array { if (!$this->available()) { return ['ok' => false, 'exit' => -1, 'output' => 'proc_open ist auf diesem Server abgeschaltet.']; } $pipes = []; $process = @proc_open( $command, [1 => ['pipe', 'w'], 2 => ['pipe', 'w']], $pipes, $cwd, // A minimal, predictable environment: no inherited APP_ENV that would make a console // command run against the wrong environment. ['PATH' => getenv('PATH') ?: '', 'SystemRoot' => getenv('SystemRoot') ?: '', 'TEMP' => sys_get_temp_dir()], ); if (!is_resource($process)) { return ['ok' => false, 'exit' => -1, 'output' => sprintf('%s konnte nicht gestartet werden.', $command[0])]; } foreach ($pipes as $pipe) { stream_set_blocking($pipe, false); } $output = ''; $deadline = microtime(true) + $timeout; while (true) { $status = proc_get_status($process); foreach ($pipes as $pipe) { $output .= stream_get_contents($pipe) ?: ''; } if (!$status['running']) { break; } if (microtime(true) > $deadline) { proc_terminate($process); foreach ($pipes as $pipe) { fclose($pipe); } proc_close($process); return ['ok' => false, 'exit' => -1, 'output' => trim($output)."\n".sprintf('Abgebrochen nach %d Sekunden.', $timeout)]; } usleep(50000); } foreach ($pipes as $pipe) { $output .= stream_get_contents($pipe) ?: ''; fclose($pipe); } proc_close($process); $exit = $status['exitcode']; return ['ok' => 0 === $exit, 'exit' => $exit, 'output' => trim($output)]; } /** * Whether an executable can be found at all, so a missing one is reported, not guessed at. * * On Windows several of these are batch files, and proc_open without a shell cannot start a * .bat - which reported "composer is not available" on a machine that has it. The variants are * tried in order, and the one that answers is remembered for the next call. */ public function has(string $executable, string $cwd): bool { return null !== $this->resolve($executable, $cwd); } /** The spelling of a command that actually starts here, or null. */ public function resolve(string $executable, string $cwd): ?array { if (array_key_exists($executable, $this->resolved)) { return $this->resolved[$executable]; } $candidates = [[$executable]]; if ('\\' === DIRECTORY_SEPARATOR) { // On Windows composer is a .bat, and CreateProcess cannot start a batch file on its // own - it needs the command interpreter. The argument list stays fixed, nothing from // a request ever reaches it. $candidates[] = [getenv('COMSPEC') ?: 'cmd.exe', '/c', $executable]; } // A phar in the project is the way on hosting where nothing is installed globally. if (is_file($cwd.'/'.$executable.'.phar')) { $candidates[] = [PHP_BINARY, $cwd.'/'.$executable.'.phar']; } foreach ($candidates as $candidate) { if ($this->run([...$candidate, '--version'], $cwd, 30)['ok']) { return $this->resolved[$executable] = $candidate; } } return $this->resolved[$executable] = null; } }