private function Lessjs::proc_open in Less CSS Preprocessor 7.3

Same name and namespace in other branches

1. 8 classes/class.lessjs.inc \Lessjs::proc_open()
2. 7.4 classes/class.lessjs.inc \Lessjs::proc_open()

3 calls to Lessjs::proc_open()

Lessjs::compile in ./class.lessjs.inc

Executes compilation of LESS input.

Lessjs::depends in ./class.lessjs.inc

Returns list of files that input file depends on.

Lessjs::version in ./class.lessjs.inc

Returns the version string from command line less.js.

File

./class.lessjs.inc, line 198

Contains 'lessjs' class; an abstraction layer for command line less.js.

Class

Lessjs

'lessjs' class.

Code

private function proc_open($command_arguments = array(), $stdin = NULL) {
  $output_data = NULL;
  $command = implode(' ', array_merge(array(
    self::$base_command,
  ), $command_arguments));

  // Handles for data exchange.
  $pipes = array(
    0 => NULL,
    // STDIN
    1 => NULL,
    // STDOUT
    2 => NULL,
  );

  // Sets permissions on $pipes.
  $descriptors = array(
    0 => array(
      'pipe',
      'r',
    ),
    // STDIN
    1 => array(
      'pipe',
      'w',
    ),
    // STDOUT
    2 => array(
      'pipe',
      'w',
    ),
  );
  $process = proc_open($command, $descriptors, $pipes);
  if (is_resource($process)) {

    // STDIN not currently used in LESS module.
    if ($this->input_file === '-' && isset($stdin)) {
      fwrite($pipes[0], $stdin);
    }
    fclose($pipes[0]);

    // fclose() on STDIN executes $command, if program is expecting input from STDIN.
    $output_data = stream_get_contents($pipes[1]);
    fclose($pipes[1]);
    $this->error = stream_get_contents($pipes[2]);
    fclose($pipes[2]);
    proc_close($process);
  }
  return $output_data;
}