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- Veröffentlicht
- 06.01.2017
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ClosureCompilerApplication.php
01 <?php
02
03 /*
04 * @package s9e\TextFormatter
05 * @copyright Copyright (c) 2010-2016 The s9e Authors
06 * @license http://www.opensource.org/licenses/mit-license.php The MIT License
07 */
08 namespace s9e\TextFormatter\Configurator\JavaScript\Minifiers;
09 use RuntimeException;
10 use s9e\TextFormatter\Configurator\JavaScript\Minifier;
11 class ClosureCompilerApplication extends Minifier
12 {
13 public $closureCompilerBin;
14 public $compilationLevel = 'ADVANCED_OPTIMIZATIONS';
15 public $excludeDefaultExterns = \true;
16 public $javaBin = 'java';
17 public $options = '--use_types_for_optimization';
18 public function __construct($filepath = \null)
19 {
20 if (isset($filepath))
21 {
22 $this->closureCompilerBin = $filepath;
23 $this->testFilepaths();
24 }
25 }
26 public function getCacheDifferentiator()
27 {
28 $key = array(
29 $this->compilationLevel,
30 $this->excludeDefaultExterns,
31 $this->options,
32 $this->getClosureCompilerBinHash()
33 );
34 if ($this->excludeDefaultExterns)
35 $key[] = \file_get_contents(__DIR__ . '/../externs.application.js');
36 return $key;
37 }
38 public function minify($src)
39 {
40 $this->testFilepaths();
41 $options = ($this->options) ? ' ' . $this->options : '';
42 if ($this->excludeDefaultExterns && $this->compilationLevel === 'ADVANCED_OPTIMIZATIONS')
43 $options .= ' --externs ' . __DIR__ . '/../externs.application.js --env=CUSTOM';
44 $crc = \crc32($src);
45 $inFile = \sys_get_temp_dir() . '/' . $crc . '.js';
46 $outFile = \sys_get_temp_dir() . '/' . $crc . '.min.js';
47 \file_put_contents($inFile, $src);
48 $cmd = \escapeshellcmd($this->javaBin)
49 . ' -jar ' . \escapeshellarg($this->closureCompilerBin)
50 . ' --compilation_level ' . \escapeshellarg($this->compilationLevel)
51 . $options
52 . ' --js ' . \escapeshellarg($inFile)
53 . ' --js_output_file ' . \escapeshellarg($outFile);
54 \exec($cmd . ' 2>/dev/null', $output, $return);
55 \unlink($inFile);
56 if (\file_exists($outFile))
57 {
58 $src = \trim(\file_get_contents($outFile));
59 \unlink($outFile);
60 }
61 if (!empty($return))
62 throw new RuntimeException('An error occured during minification');
63 return $src;
64 }
65 protected function getClosureCompilerBinHash()
66 {
67 static $cache = array();
68 if (!isset($cache[$this->closureCompilerBin]))
69 $cache[$this->closureCompilerBin] = \md5_file($this->closureCompilerBin);
70 return $cache[$this->closureCompilerBin];
71 }
72 protected function testFilepaths()
73 {
74 if (!isset($this->closureCompilerBin))
75 throw new RuntimeException('No path set for Closure Compiler');
76 if (!\file_exists($this->closureCompilerBin))
77 throw new RuntimeException('Cannot find Closure Compiler at ' . $this->closureCompilerBin);
78 }
79 }