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- Veröffentlicht
- 27.04.2026
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ClosureCompilerApplication.php
001 <?php
002
003 /**
004 * @package s9e\TextFormatter
005 * @copyright Copyright (c) 2010-2022 The s9e authors
006 * @license http://www.opensource.org/licenses/mit-license.php The MIT License
007 */
008 namespace s9e\TextFormatter\Configurator\JavaScript\Minifiers;
009
010 use RuntimeException;
011 use s9e\TextFormatter\Configurator\JavaScript\Minifier;
012
013 class ClosureCompilerApplication extends Minifier
014 {
015 /**
016 * @var string Command used to invoke the Closure Compiler application
017 */
018 public $command;
019
020 /**
021 * @var string Closure Compiler's compilation level
022 */
023 public $compilationLevel = 'ADVANCED_OPTIMIZATIONS';
024
025 /**
026 * @var bool Whether to exclude Closure Compiler's default externs
027 */
028 public $excludeDefaultExterns = true;
029
030 /**
031 * @var string Extra options to be passed to the Closure Compiler application
032 */
033 public $options = '--use_types_for_optimization';
034
035 /**
036 * Constructor
037 *
038 * @param string $command Command to execute
039 */
040 public function __construct($command)
041 {
042 $this->command = $command;
043 }
044
045 /**
046 * {@inheritdoc}
047 */
048 public function getCacheDifferentiator()
049 {
050 $key = [
051 $this->command,
052 $this->compilationLevel,
053 $this->excludeDefaultExterns,
054 $this->options
055 ];
056 if ($this->excludeDefaultExterns)
057 {
058 $key[] = file_get_contents(__DIR__ . '/../externs.application.js');
059 }
060
061 return $key;
062 }
063
064 /**
065 * Compile given JavaScript source via the Closure Compiler application
066 *
067 * @param string $src JavaScript source
068 * @return string Compiled source
069 */
070 public function minify($src)
071 {
072 $options = ($this->options) ? ' ' . $this->options : '';
073
074 // Add our custom externs if default externs are disabled
075 if ($this->excludeDefaultExterns && $this->compilationLevel === 'ADVANCED_OPTIMIZATIONS')
076 {
077 $options .= ' --externs ' . __DIR__ . '/../externs.application.js --env=CUSTOM';
078 }
079
080 $crc = crc32($src);
081 $inFile = sys_get_temp_dir() . '/' . $crc . '.js';
082 $outFile = sys_get_temp_dir() . '/' . $crc . '.min.js';
083 file_put_contents($inFile, $src);
084
085 $cmd = $this->command
086 . ' --compilation_level ' . escapeshellarg($this->compilationLevel)
087 . $options
088 . ' --js ' . escapeshellarg($inFile)
089 . ' --js_output_file ' . escapeshellarg($outFile);
090
091 exec($cmd . ' 2>&1', $output, $return);
092 unlink($inFile);
093
094 if (file_exists($outFile))
095 {
096 $src = trim(file_get_contents($outFile));
097 unlink($outFile);
098 }
099
100 if (!empty($return))
101 {
102 throw new RuntimeException('An error occured during minification: ' . implode("\n", $output));
103 }
104
105 return $src;
106 }
107 }