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<?php
/**
* Class Minify_ClosureCompiler
* @package Minify
*/
/**
* Run Closure Compiler via NailGun
*
* @package Minify
* @author Elan Ruusamäe <glen@delfi.ee>
* @link https://github.com/martylamb/nailgun
*/
class Minify_NailgunClosureCompiler extends Minify_ClosureCompiler
{
const NG_SERVER = 'com.martiansoftware.nailgun.NGServer';
const CC_MAIN = 'com.google.javascript.jscomp.CommandLineRunner';
/**
* For some reasons Nailgun thinks that it's server
* broke the connection and returns 227 instead of 0
* We'll just handle this here instead of fixing
* the nailgun client itself.
*
* It also sometimes breaks on 229 on the devbox.
* To complete this whole madness and made future
* 'fixes' easier I added this nice little array...
* @var array
*/
private static $NG_EXIT_CODES = array(0, 227, 229);
/**
* Filepath of "ng" executable (from Nailgun package)
*
* @var string
*/
public static $ngExecutable = 'ng';
/**
* Filepath of the Nailgun jar file.
*
* @var string
*/
public static $ngJarFile;
/**
* Get command to launch NailGun server.
*
* @return array
*/
protected function getServerCommandLine()
{
$this->checkJar(self::$ngJarFile);
$this->checkJar(self::$jarFile);
$classPath = array(
self::$ngJarFile,
self::$jarFile,
);
// The command for the server that should show up in the process list
$server = array(
self::$javaExecutable,
'-server',
'-cp', implode(':', $classPath),
self::NG_SERVER,
);
return $server;
}
/**
* @return array
* @throws Minify_ClosureCompiler_Exception
*/
protected function getCompilerCommandLine()
{
$server = array(
self::$ngExecutable,
escapeshellarg(self::CC_MAIN)
);
return $server;
}
/**
* @param string $tmpFile
* @param array $options
* @return string
* @throws Minify_ClosureCompiler_Exception
*/
protected function compile($tmpFile, $options)
{
$this->startServer();
$command = $this->getCommand($options, $tmpFile);
return implode("\n", $this->shell($command, self::$NG_EXIT_CODES));
}
private function startServer()
{
$serverCommand = implode(' ', $this->getServerCommandLine());
$psCommand = $this->shell("ps -o cmd= -C " . self::$javaExecutable);
if (in_array($serverCommand, $psCommand, true)) {
// already started!
return;
}
$this->shell("$serverCommand </dev/null >/dev/null 2>/dev/null & sleep 10");
}
}
|
