wp-optimize / vendor / mrclay / minify / lib / Minify / NailgunClosureCompiler.php

NailgunClosureCompiler.php in WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance 3.2.3, at vendor/mrclay/minify/lib/Minify/NailgunClosureCompiler.php

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1	<?php
2
3	/**
4	* Class Minify_ClosureCompiler
5	* @package Minify
6	*/
7
8	/**
9	* Run Closure Compiler via NailGun
10	*
11	* @package Minify
12	* @author Elan Ruusamäe <[email protected]>
13	* @link https://github.com/martylamb/nailgun
14	*/
15	class Minify_NailgunClosureCompiler extends Minify_ClosureCompiler
16	{
17	const NG_SERVER = 'com.martiansoftware.nailgun.NGServer';
18	const CC_MAIN = 'com.google.javascript.jscomp.CommandLineRunner';
19
20	/**
21	* For some reasons Nailgun thinks that it's server
22	* broke the connection and returns 227 instead of 0
23	* We'll just handle this here instead of fixing
24	* the nailgun client itself.
25	*
26	* It also sometimes breaks on 229 on the devbox.
27	* To complete this whole madness and made future
28	* 'fixes' easier I added this nice little array...
29	* @var array
30	*/
31	private static $NG_EXIT_CODES = array(0, 227, 229);
32
33	/**
34	* Filepath of "ng" executable (from Nailgun package)
35	*
36	* @var string
37	*/
38	public static $ngExecutable = 'ng';
39
40	/**
41	* Filepath of the Nailgun jar file.
42	*
43	* @var string
44	*/
45	public static $ngJarFile;
46
47	/**
48	* Get command to launch NailGun server.
49	*
50	* @return array
51	*/
52	protected function getServerCommandLine()
53	{
54	$this->checkJar(self::$ngJarFile);
55	$this->checkJar(self::$jarFile);
56
57	$classPath = array(
58	self::$ngJarFile,
59	self::$jarFile,
60	);
61
62	// The command for the server that should show up in the process list
63	$server = array(
64	self::$javaExecutable,
65	'-server',
66	'-cp', implode(':', $classPath),
67	self::NG_SERVER,
68	);
69
70	return $server;
71	}
72
73	/**
74	* @return array
75	* @throws Minify_ClosureCompiler_Exception
76	*/
77	protected function getCompilerCommandLine()
78	{
79	$server = array(
80	self::$ngExecutable,
81	escapeshellarg(self::CC_MAIN)
82	);
83
84	return $server;
85	}
86
87	/**
88	* @param string $tmpFile
89	* @param array $options
90	* @return string
91	* @throws Minify_ClosureCompiler_Exception
92	*/
93	protected function compile($tmpFile, $options)
94	{
95	$this->startServer();
96
97	$command = $this->getCommand($options, $tmpFile);
98
99	return implode("\n", $this->shell($command, self::$NG_EXIT_CODES));
100	}
101
102	private function startServer()
103	{
104	$serverCommand = implode(' ', $this->getServerCommandLine());
105	$psCommand = $this->shell("ps -o cmd= -C " . self::$javaExecutable);
106	if (in_array($serverCommand, $psCommand, true)) {
107	// already started!
108	return;
109	}
110
111	$this->shell("$serverCommand </dev/null >/dev/null 2>/dev/null & sleep 10");
112	}
113	}
114