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Compiling JS with Closure Compiler and PHP

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ported to PHP5 from this tutorial: http://bohuco.net/blog/2010/09/use-google-closure-compiler-local-with-php/
since I had problems running the compiler on mutliple files, I did the joining myself.

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  1. <?php
  2. /**
  3. my scripts and the order of the scripts are stored in a simple XML file (static.scripts.xml):
  4. <group>
  5. 	<item>jquery.js</item>
  6. 	<item>jquery.easing.js</item>
  7. 	<item>scrollable.js</item>
  8. 	<item>scrollable.autoscroll.js</item>
  9. 	<item>pointbar.js</item>
  10. 	<item>jquery.actions.js</item>
  11. </group>
  12. **/
  13. class JSCompiler {
  14. 	public $scriptpath = '/js/';
  15. 	public $tmppath = '/js/cache/';
  16. 	public $tmpname;
  17. 	public $compiler = '/js/jscompiler/compiler.jar';
  18. 	public $output = '/js/scripts.min.js';
  19.  
  20. 	public function JSCompiler() {
  21. 		$this->tmpname = "joined-".time().".js";
  22. 		$this->output = $_SERVER["DOCUMENT_ROOT"].$this->output;
  23. 		$this->getScripts();
  24. 	}
  25.  
  26. 	/**
  27. 	 * reads all Javascript files from XML, joins them and saves a temp file in /js/cache
  28. 	 * @return void
  29. 	 */
  30. 	public function getScripts() {
  31. 		$scripts = new DOMDocument();
  32. 		$tmp = file_get_contents('/static.scripts.xml');
  33. 		// load script names
  34. 		$scripts->loadXML($tmp);
  35. 		// get each files contents
  36. 		$xpath = new DOMXPath($scripts);
  37. 		$res = $xpath->query("//item");
  38. 		$jsString = '';
  39. 		foreach($res as $item) {
  40. 			$filename = $item->nodeValue;
  41. 			if (file_exists($_SERVER["DOCUMENT_ROOT"]."/js/$filename")) {
  42. 				$jsString .= file_get_contents($_SERVER["DOCUMENT_ROOT"]."/js/$filename"); // join them together
  43. 			} else {
  44. 				echo "file <samp>$filename</samp> not found!";
  45. 			}
  46. 		}
  47. 		if (!is_dir($_SERVER["DOCUMENT_ROOT"].$this->tmppath)) {
  48. 			echo $this->tmppath." doesn't exist";
  49. 		} else {
  50. 			file_put_contents($_SERVER["DOCUMENT_ROOT"].$this->tmppath.$this->tmpname, $jsString); // save temp. file
  51. 		}
  52. 	}
  53.  
  54. 	/**
  55. 	 * fires the command to run Google Closure Compiler
  56. 	 * @uses the temporary file created by getScipts()
  57. 	 * @return string error message
  58. 	 */
  59. 	public function compile($output = '', $level = '') {
  60. 		if ($output === '') $output = $this->output;
  61. 		if ($level === '') $level = 'ADVANCED_OPTIMIZATIONS';
  62. 		$compiler = $this->compiler;
  63. 		if (file_exists($_SERVER["DOCUMENT_ROOT"].$this->tmppath.$this->tmpname)) {
  64. 			$compilerCommand = "/usr/bin/java -jar $compiler --compilation_level $level --jscomp_dev_mode START --js " . $_SERVER["DOCUMENT_ROOT"].$this->tmppath.$this->tmpname . " --js_output_file $output 2>&1";
  65. 			exec($compilerCommand, $return, $code);
  66. 			if ($code != 0) {
  67. 				return sprintf("Fuck! Something went wrong: %s (%s)", join('<br />', $return), $code);
  68. 			} else {
  69. 				return "compiled successfully";
  70. 			}
  71. 		} else {
  72. 			return "tempfile not found.";
  73. 		}
  74. 	}
  75. }

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