autorun command automatically

gistfile1.aw

<?php

class Colors {
	private $foreground_colors = array();
	private $background_colors = array();

	public function __construct() {
		// Set up shell colors
		$this->foreground_colors['black'] = '0;30';
		$this->foreground_colors['dark_gray'] = '1;30';
		$this->foreground_colors['blue'] = '0;34';
		$this->foreground_colors['light_blue'] = '1;34';
		$this->foreground_colors['green'] = '0;32';
		$this->foreground_colors['light_green'] = '1;32';
		$this->foreground_colors['cyan'] = '0;36';
		$this->foreground_colors['light_cyan'] = '1;36';
		$this->foreground_colors['red'] = '0;31';
		$this->foreground_colors['light_red'] = '1;31';
		$this->foreground_colors['purple'] = '0;35';
		$this->foreground_colors['light_purple'] = '1;35';
		$this->foreground_colors['brown'] = '0;33';
		$this->foreground_colors['yellow'] = '1;33';
		$this->foreground_colors['light_gray'] = '0;37';
		$this->foreground_colors['white'] = '1;37';

		$this->background_colors['black'] = '40';
		$this->background_colors['red'] = '41';
		$this->background_colors['green'] = '42';
		$this->background_colors['yellow'] = '43';
		$this->background_colors['blue'] = '44';
		$this->background_colors['magenta'] = '45';
		$this->background_colors['cyan'] = '46';
		$this->background_colors['light_gray'] = '47';
	}

	// Returns colored string
	public function getColoredString($string, $foreground_color = null, $background_color = null) {
		$colored_string = "";

		// Check if given foreground color found
		if (isset($this->foreground_colors[$foreground_color])) {
			$colored_string .= "\033[" . $this->foreground_colors[$foreground_color] . "m";
		}
		// Check if given background color found
		if (isset($this->background_colors[$background_color])) {
			$colored_string .= "\033[" . $this->background_colors[$background_color] . "m";
		}

		// Add string and end coloring
		$colored_string .=  $string . "\033[0m";

		return $colored_string;
	}

	// Returns all foreground color names
	public function getForegroundColors() {
		return array_keys($this->foreground_colors);
	}

	// Returns all background color names
	public function getBackgroundColors() {
		return array_keys($this->background_colors);
	}
}

$colors = new Colors;

function get_files ($dir)
{
	$res = opendir($dir);
	if (!$res) {
		return array();
	}

	$files = array();

	while (($file = readdir($res))) {
		if (in_array($file, array('.', '..', '.git'))) {
			continue;
		}

		$file = $dir . '/' . $file;

		if (is_dir($file)) {
			$files = array_merge($files, get_files($file));
		} else if (is_file($file) && strpos($file, '.php') !== false) {
			$files[$file] = filemtime($file);
		}
	}

	closedir($res);
	return $files;
}

function get_files_hash ($dir)
{
	clearstatcache();

	if (is_array($dir)) {
		$md5 = '';

		foreach ($dir as $e) {
			$md5 .= get_files_hash($e);
		}

		return md5($md5);
	}

	$files = get_files($dir);
	$md5 = '';
	foreach ($files as $file=>$time) {
		$md5 .= $file . ':' . $time;
	}


	return md5($md5);
}

function get_env_vars ()
{
	return $_ENV;
}

function monitor ($dir, $command)
{
	global $colors;

	$lastcheck = microtime(true);
	$last = get_files_hash($dir);

	$i = 1;

	$clear = implode('', array_map('chr', array(27, 91, 72, 27, 91, 50, 74)));
	$line = str_repeat('-', exec('tput cols'));
	echo $clear;


	while (true) {
		$cols = exec('tput cols');
		echo $last . '  running for #' . $i++ . ': ' . $command ."\n";
		echo $line;

		$descs = array(array('pipe', 'r'), array('pipe', 'w'), array('pipe', 'w'));
		$pipes = arraY();
		$cwd = getcwd();
		$env = get_env_vars();

		$proc = proc_open($command, $descs, $pipes);

		$read = array($pipes[1], $pipes[2]);
		$write = null;
		$except = null;

		foreach ($read as $pipe) {
			stream_set_timeout($pipe, 0, 100);
		}


		while (true) {
			$read = array($pipes[1], $pipes[2]);

			foreach ($read as $o=>$k) {
				if (feof($k)) {
					unset($read[$o]);
				}
			}

			if (!$read) {
				break;
			}

			stream_select($read, $write, $except, 0, 500000);

			foreach ($read as $pipe) {
					if ($pipe == $pipes[2]) {
						$buff = fgets($pipe);
					} else {
						$buff = fread($pipe, 1);
					}

				if ($buff !== false) {
					if ($pipe == $pipes[2]) {
						echo $colors->getColoredString($buff, "white", "red");
					} else {
						echo $buff;
					}
				}
			}

			$newcheck = microtime(true);

			if ($newcheck - $lastcheck < 1) {
				continue;
			}

			$lastcheck = $newcheck;

			$new = get_files_hash($dir);

			if ($new != $last) {
				echo "terminating ";
				$info = proc_get_status($proc);
				posix_kill($info['pid'], SIGKILL);
				break;
			}
		}

		echo $line;

		echo "closing pipes ";
		foreach ($pipes as $pipe) {
			fclose($pipe);
		}

		echo "closing proc ";

		$out = proc_close($proc);

		echo "\n$line";

		# success
		echo "Exit status: $out\n";

		# loop and wait til file changes so we can re-run it
		while (true) {
			$new =  get_files_hash($dir);

			if ($new != $last) {
				break;
			}

			# sleep for 1 secs if previous run died, or else .4 seconds
			usleep(500000);
		}

		$last = $new;
		echo $clear;
	}
}

$command = array_pop($argv);
array_shift($argv);

monitor($argv, $command);