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Signed-off-by: Peter Breuls <breuls@devize.nl>
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Copyright (C) 2013 Peter Breuls
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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# Closure Compiler
## What is the Closure Compiler?
From [Google](https://developers.google.com/closure/compiler/):
> The Closure Compiler is a tool for making JavaScript download and run faster. It is a true compiler for JavaScript. Instead of compiling from a source language to machine code, it compiles from JavaScript to better JavaScript. It parses your JavaScript, analyzes it, removes dead code and rewrites and minimizes what's left. It also checks syntax, variable references, and types, and warns about common JavaScript pitfalls.
## Why does this library exist?
The Closure Compiler (CC), as provided by Google, is available as a web application or for download as a commandline Java jarfile. This file can be used to run your own compilations. However, to use the compiler this way, you must type (or paste) all your javascript filenames into a terminal window, which can be cumbersome and is not easy to automate.
This library provides a PHP wrapper around the CC which can be used in PHP scripts. Using the wrapper, you can connect the configuration of your PHP application to the compiler and automate your compilations. Your compilation build script can then be used in, for instance, a Phing script.
## Installation
Clone this repository and include the classes. Or use Composer:
"require-dev": {
"devize/closure-compiler": "*"
}
The library uses Composer's autoloader so if your application uses it as well, you don't have to do anything else.
## Usage
Assuming you have managed your own autoloader, set your own includes or are using Composer's autoloader:
use Devize\ClosureCompiler\ClosureCompiler;
$compiler = new ClosureCompiler;
$compiler->setSourceBaseDir('path/to/javascript-files/');
$compiler->setTargetBaseDir('path/to/javascript-files/');
$compiler->setSourceFiles(array('one.js', 'two.js', 'three.js'));
$compiler->addSourceFile('four');
$compiler->compile();
The `compile()` method uses a system call to execute the Jar-file.
## License
This library packages the Closure Compiler from Google. The folder `compiler-latest` is the result of unpacking the Google-supplied [Zip file](http://closure-compiler.googlecode.com/files/compiler-latest.zip). Its license is included.
The PHP wrapper files are licensed under the MIT license.
## Feedback
Any feedback is welcome; use the Github system or send a tweet to @breuls.

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<?xml version="1.0" encoding="UTF-8"?>
<project name="ClosureCompiler" default="hello">
<target name="hello">
<echo msg="Usage: phing [update|test]" />
</target>
<target name="update">
<echo msg="Updating from Git..." />
<exec command="git pull " passthru="true" />
<echo msg="Updating Composer..." />
<exec command="composer update " passthru="true" />
<echo msg="Done." />
</target>
<target name="test" depends="update">
<echo msg="Running PHPunit..." />
<exec command="php vendor/bin/phpunit " passthru="true" />
<echo msg="Test done." />
</target>
</project>

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/*
* Copyright 2009 The Closure Compiler Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//
// Contents
//
The Closure Compiler performs checking, instrumentation, and
optimizations on JavaScript code. The purpose of this README is to
explain how to build and run the Closure Compiler.
The Closure Compiler requires Java 6 or higher.
http://www.java.com/
//
// Building The Closure Compiler
//
There are three ways to get a Closure Compiler executable.
1) Use one we built for you.
Pre-built Closure binaries can be found at
http://code.google.com/p/closure-compiler/downloads/list
2) Check out the source and build it with Apache Ant.
First, check out the full source tree of the Closure Compiler. There
are instructions on how to do this at the project site.
http://code.google.com/p/closure-compiler/source/checkout
Apache Ant is a cross-platform build tool.
http://ant.apache.org/
At the root of the source tree, there is an Ant file named
build.xml. To use it, navigate to the same directory and type the
command
ant jar
This will produce a jar file called "build/compiler.jar".
3) Check out the source and build it with Eclipse.
Eclipse is a cross-platform IDE.
http://www.eclipse.org/
Under Eclipse's File menu, click "New > Project ..." and create a
"Java Project." You will see an options screen. Give the project a
name, select "Create project from existing source," and choose the
root of the checked-out source tree as the existing directory. Verify
that you are using JRE version 6 or higher.
Eclipse can use the build.xml file to discover rules. When you
navigate to the build.xml file, you will see all the build rules in
the "Outline" pane. Run the "jar" rule to build the compiler in
build/compiler.jar.
//
// Running The Closure Compiler
//
Once you have the jar binary, running the Closure Compiler is straightforward.
On the command line, type
java -jar compiler.jar
This starts the compiler in interactive mode. Type
var x = 17 + 25;
then hit "Enter", then hit "Ctrl-Z" (on Windows) or "Ctrl-D" (on Mac or Linux)
and "Enter" again. The Compiler will respond:
var x=42;
The Closure Compiler has many options for reading input from a file,
writing output to a file, checking your code, and running
optimizations. To learn more, type
java -jar compiler.jar --help
You can read more detailed documentation about the many flags at
http://code.google.com/closure/compiler/docs/gettingstarted_app.html
//
// Compiling Multiple Scripts
//
If you have multiple scripts, you should compile them all together with
one compile command.
java -jar compiler.jar --js=in1.js --js=in2.js ... --js_output_file=out.js
The Closure Compiler will concatenate the files in the order they're
passed at the command line.
If you need to compile many, many scripts together, you may start to
run into problems with managing dependencies between scripts. You
should check out the Closure Library. It contains functions for
enforcing dependencies between scripts, and a tool called calcdeps.py
that knows how to give scripts to the Closure Compiler in the right
order.
http://code.google.com/p/closure-library/
//
// Licensing
//
Unless otherwise stated, all source files are licensed under
the Apache License, Version 2.0.
-----
Code under:
src/com/google/javascript/rhino
test/com/google/javascript/rhino
URL: http://www.mozilla.org/rhino
Version: 1.5R3, with heavy modifications
License: Netscape Public License and MPL / GPL dual license
Description: A partial copy of Mozilla Rhino. Mozilla Rhino is an
implementation of JavaScript for the JVM. The JavaScript parser and
the parse tree data structures were extracted and modified
significantly for use by Google's JavaScript compiler.
Local Modifications: The packages have been renamespaced. All code not
relevant to parsing has been removed. A JsDoc parser and static typing
system have been added.
-----
Code in:
lib/rhino
Rhino
URL: http://www.mozilla.org/rhino
Version: Trunk
License: Netscape Public License and MPL / GPL dual license
Description: Mozilla Rhino is an implementation of JavaScript for the JVM.
Local Modifications: Minor changes to parsing JSDoc that usually get pushed
up-stream to Rhino trunk.
-----
Code in:
lib/args4j.jar
Args4j
URL: https://args4j.dev.java.net/
Version: 2.0.16
License: MIT
Description:
args4j is a small Java class library that makes it easy to parse command line
options/arguments in your CUI application.
Local Modifications: None.
-----
Code in:
lib/guava.jar
Guava Libraries
URL: http://code.google.com/p/guava-libraries/
Version: 14.0
License: Apache License 2.0
Description: Google's core Java libraries.
Local Modifications: None.
-----
Code in:
lib/jsr305.jar
Annotations for software defect detection
URL: http://code.google.com/p/jsr-305/
Version: svn revision 47
License: BSD License
Description: Annotations for software defect detection.
Local Modifications: None.
-----
Code in:
lib/jarjar.jar
Jar Jar Links
URL: http://jarjar.googlecode.com/
Version: 1.1
License: Apache License 2.0
Description:
A utility for repackaging Java libraries.
Local Modifications: None.
----
Code in:
lib/junit.jar
JUnit
URL: http://sourceforge.net/projects/junit/
Version: 4.10
License: Common Public License 1.0
Description: A framework for writing and running automated tests in Java.
Local Modifications: None.
---
Code in:
lib/protobuf-java.jar
Protocol Buffers
URL: http://code.google.com/p/protobuf/
Version: 2.4.1
License: New BSD License
Description: Supporting libraries for protocol buffers,
an encoding of structured data.
Local Modifications: None
---
Code in:
lib/ant.jar
lib/ant-launcher.jar
URL: http://ant.apache.org/bindownload.cgi
Version: 1.8.1
License: Apache License 2.0
Description:
Ant is a Java based build tool. In theory it is kind of like "make"
without make's wrinkles and with the full portability of pure java code.
Local Modifications: None
---
Code in:
lib/json.jar
URL: http://json.org/java/index.html
Version: JSON version 20090211
License: MIT license
Description:
JSON is a set of java files for use in transmitting data in JSON format.
Local Modifications: None
---
Code in:
tools/maven-ant-tasks-2.1.3.jar
URL: http://maven.apache.org
Version 2.1.3
License: Apache License 2.0
Description:
Maven Ant tasks are used to manage dependencies and to install/deploy to
maven repositories.
Local Modifications: None

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{
"name": "devize/closure-compiler",
"description": "Google's Closure Compiler for use in PHP-based projects",
"license": "MIT",
"authors": [
{
"name": "Peter Breuls",
"email": "breuls@devize.nl"
}
],
"require": {
},
"require-dev": {
"phpunit/phpunit": "3.7.*",
"mikey179/vfsStream": "*"
},
"autoload": {
"classmap": ["src"]
}
}

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<phpunit colors="true">
<testsuites>
<testsuite name="ClosureCompiler">
<directory>tests</directory>
</testsuite>
</testsuites>
<logging>
<log type="coverage-html" target="tests/coverage" charset="UTF-8" highlight="true" lowUpperBound="35" highLowerBound="70"/>
</logging>
<filter>
<whitelist addUncoveredFilesFromWhitelist="false">
<directory suffix=".php">./</directory>
<exclude>
<directory suffix=".php">tests</directory>
<directory suffix=".php">vendor</directory>
</exclude>
</whitelist>
</filter>
</phpunit>

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<?php
namespace Devize\ClosureCompiler;
/**
* PHP-wrapper to create an interface between Google's Closure Compiler and your PHP scripts
*
* Usage: set basedirs for your files, set names for the source files and resulting target file, and compile.
*
* $compiler = new ClosureCompiler;
* $compiler->setSourceBaseDir('path/to/javascript-src/');
* $compiler->setTargetBaseDir('path/to/javascript/');
*
* $compiler->addSourceFile('functions.js');
* $compiler->addSourceFile('library.js');
*
* to add multiple files:
*
* $compiler->setSourceFiles(array('one.js', 'two.js', 'three.js'));
*
*
* $compiler->setTargetFile('minified.js');
* $compiler->compile();
*
* @author Peter Breuls <breuls@devize.nl>
*/
class ClosureCompiler
{
protected $compilerJar = 'compiler-latest/compiler.jar';
protected $config = array(
'sourceBaseDir' => '',
'targetBaseDir' => '',
'sourceFileNames' => array(),
'targetFileName' => 'compiled.js',
);
public function __construct()
{
$this->compilerJar = realpath(__DIR__ . '/../../' . $this->compilerJar);
}
public function getBinary()
{
return 'java -jar ' . $this->compilerJar;
}
public function getConfig()
{
return $this->config;
}
public function setSourceBaseDir($path = '')
{
if (file_exists($path)) {
$this->config['sourceBaseDir'] = rtrim($path, '/') . '/';
} elseif (empty($path)) {
$this->config['sourceBaseDir'] = '';
} else {
throw new CompilerException("The path '{$path}' does not seem to exist.");
}
}
public function setTargetBaseDir($path = '')
{
if (file_exists($path)) {
$this->config['targetBaseDir'] = rtrim($path, '/') . '/';
} elseif (empty($path)) {
$this->config['targetBaseDir'] = '';
} else {
throw new CompilerException("The path '{$path}' does not seem to exist.");
}
}
public function clearSourceFiles()
{
$this->config['sourceFileNames'] = array();
}
public function addSourceFile($file)
{
$path = $this->config['sourceBaseDir'] . $file;
if (in_array($path, $this->config['sourceFileNames'])) {
return;
}
if (file_exists($path)) {
$this->config['sourceFileNames'][] = $path;
} else {
throw new CompilerException("The path '{$path}' does not seem to exist.");
}
}
public function setSourceFiles(array $files, $reset = true)
{
if ($reset === true) {
$this->clearSourceFiles();
}
foreach ($files as $file) {
$this->addSourceFile($file);
}
}
public function removeSourceFile($file)
{
$path = $this->config['sourceBaseDir'] . $file;
$index = array_search($path, $this->config['sourceFileNames']);
if ($index !== false) {
unset($this->config['sourceFileNames'][$index]);
}
}
public function setTargetFile($file)
{
$path = $this->config['targetBaseDir'] . $file;
if (file_exists($path)) {
$this->config['targetFileName'] = $path;
} else {
throw new CompilerException("The path '{$path}' does not seem to exist.");
}
}
public function compile()
{
# check for possible overwrite of source files
if (in_array($this->config['targetFileName'], $this->config['sourceFileNames'])) {
throw new CompilerException("The target file '{$this->config['targetFileName']}' is one of the source files. A compile would cause undesired effects.");
}
# check for path
if (basename($this->config['targetFileName']) === $this->config['targetFileName'] and !empty($this->config['targetBaseDir'])) {
$this->config['targetFileName'] = $this->config['targetBaseDir'] . $this->config['targetFileName'];
}
$command = $this->getBinary();
foreach ($this->config['sourceFileNames'] as $file) {
$command .= " --js={$file}";
}
$command .= " --js_output_file={$this->config['targetFileName']} 2>&1";
$return = '';
$output = array();
exec($command, $output, $return);
return $return;
}
}

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<?php
namespace Devize\ClosureCompiler;
class CompilerException extends \Exception {
}

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<?php
use Devize\ClosureCompiler\ClosureCompiler;
use org\bovigo\vfs\vfsStream;
use org\bovigo\vfs\vfsStreamWrapper;
/**
* Generated by PHPUnit_SkeletonGenerator 1.2.0 on 2013-05-09 at 16:25:31.
*/
class closureCompilerTest extends PHPUnit_Framework_TestCase
{
/**
* @var ClosureCompiler
*/
protected $object;
/**
* Sets up the fixture, for example, opens a network connection.
* This method is called before a test is executed.
*/
protected function setUp()
{
$this->object = new ClosureCompiler;
#$this->root = vfsStream::setup('tmp');
vfsStream::setup('tmp');
}
/**
* Tears down the fixture, for example, closes a network connection.
* This method is called after a test is executed.
*/
protected function tearDown()
{
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::getBinary
* @covers Devize\ClosureCompiler\ClosureCompiler::__construct
*/
public function testGetBinary()
{
$result = $this->object->getBinary();
$this->assertNotEmpty($result);
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::getConfig
*/
public function testGetConfig()
{
$result = $this->object->getConfig();
$this->assertNotEmpty($result);
$this->assertInternalType('array', $result);
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::setSourceBaseDir
*/
public function testSetSourceBaseDir1()
{
$dir = vfsStream::url('tmp');
$this->object->setSourceBaseDir($dir);
$result = $this->object->getConfig();
$this->assertEquals($dir . '/', $result['sourceBaseDir']);
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::setSourceBaseDir
*/
public function testSetSourceBaseDir2()
{
$this->object->setSourceBaseDir();
$result = $this->object->getConfig();
$this->assertEquals('', $result['sourceBaseDir']);
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::setSourceBaseDir
* @expectedException Devize\ClosureCompiler\CompilerException
* @expectedExceptionMessage The path 'non-existent-path' does not seem to exist.
*/
public function testSetSourceBaseDir3()
{
$this->object->setSourceBaseDir('non-existent-path');
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::setTargetBaseDir
*/
public function testSetTargetBaseDir1()
{
$dir = vfsStream::url('tmp');
$this->object->setTargetBaseDir($dir);
$result = $this->object->getConfig();
$this->assertEquals($dir . '/', $result['targetBaseDir']);
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::setTargetBaseDir
*/
public function testSetTargetBaseDir2()
{
$this->object->setTargetBaseDir();
$result = $this->object->getConfig();
$this->assertEquals('', $result['targetBaseDir']);
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::setTargetBaseDir
* @expectedException Devize\ClosureCompiler\CompilerException
* @expectedExceptionMessage The path 'non-existent-path' does not seem to exist.
*/
public function testSetTargetBaseDir3()
{
$this->object->setTargetBaseDir('non-existent-path');
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::clearSourceFiles
*/
public function testClearSourceFiles()
{
$this->object->clearSourceFiles();
$result = $this->object->getConfig();
$this->assertEmpty($result['sourceFileNames']);
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::addSourceFile
*/
public function testAddSourceFile1()
{
#vfsStream::setup('tmp/test.js');
$root = vfsStreamWrapper::getRoot();
$root->addChild(vfsStream::newFile('test.js'));
$dir = vfsStream::url('tmp');
$this->object->setSourceBaseDir($dir);
$this->object->addSourceFile('test.js');
$result = $this->object->getConfig();
$this->assertNotEmpty($result['sourceFileNames']);
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::addSourceFile
*/
public function testAddSourceFile2()
{
#vfsStream::setup('tmp/test.js');
$root = vfsStreamWrapper::getRoot();
$root->addChild(vfsStream::newFile('test.js'));
$dir = vfsStream::url('tmp');
$this->object->setSourceBaseDir($dir);
$this->object->addSourceFile('test.js');
$this->object->addSourceFile('test.js'); # duplicate file name
$result = $this->object->getConfig();
$this->assertEquals(1,count($result['sourceFileNames']));
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::addSourceFile
* @expectedException Devize\ClosureCompiler\CompilerException
* @expectedExceptionMessage The path 'vfs://tmp/test.js' does not seem to exist.
*/
public function testAddSourceFile3()
{
#vfsStream::setup('tmp/test.js');
$dir = vfsStream::url('tmp');
$this->object->setSourceBaseDir($dir);
$this->object->addSourceFile('test.js');
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::setSourceFiles
*/
public function testSetSourceFiles()
{
$root = vfsStreamWrapper::getRoot();
$root->addChild(vfsStream::newFile('test1.js'));
$root->addChild(vfsStream::newFile('test2.js'));
$dir = vfsStream::url('tmp');
$this->object->setSourceBaseDir($dir);
$this->object->setSourceFiles(array('test1.js', 'test2.js'));
$result = $this->object->getConfig();
$this->assertNotEmpty($result['sourceFileNames']);
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::removeSourceFile
*/
public function testRemoveSourceFile()
{
$root = vfsStreamWrapper::getRoot();
$root->addChild(vfsStream::newFile('test.js'));
$dir = vfsStream::url('tmp');
$this->object->setSourceBaseDir($dir);
$this->object->setSourceFiles(array('test.js'));
$this->object->removeSourceFile('test.js');
$result = $this->object->getConfig();
$this->assertEmpty($result['sourceFileNames']);
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::setTargetFile
* @expectedException Devize\ClosureCompiler\CompilerException
* @expectedExceptionMessage The path 'test.js' does not seem to exist.
*/
public function testSetTargetFile1()
{
$this->object->setTargetFile('test.js');
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::setTargetFile
*/
public function testSetTargetFile2()
{
$root = vfsStreamWrapper::getRoot();
$root->addChild(vfsStream::newFile('test.js'));
$dir = vfsStream::url('tmp');
$this->object->setTargetBaseDir($dir);
$this->object->setTargetFile('test.js');
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::compile
* @expectedException Devize\ClosureCompiler\CompilerException
* @expectedExceptionMessage The target file 'vfs://tmp/test.js' is one of the source files. A compile would cause undesired effects.
*/
public function testCompile1()
{
$root = vfsStreamWrapper::getRoot();
$root->addChild(vfsStream::newFile('test.js'));
$dir = vfsStream::url('tmp');
$this->object->setSourceBaseDir($dir);
$this->object->setSourceFiles(array('test.js'));
$this->object->setTargetBaseDir($dir);
$this->object->setTargetFile('test.js');
$result = $this->object->compile();
$this->assertEquals(1, $result);
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::compile
*/
public function testCompile2()
{
$root = vfsStreamWrapper::getRoot();
$root->addChild(vfsStream::newFile('test.js'));
$dir = vfsStream::url('tmp');
$this->object->setSourceBaseDir($dir);
$this->object->setSourceFiles(array('test.js'));
$result = $this->object->compile();
$this->assertEquals(1, $result);
}
/**
* @covers Devize\ClosureCompiler\ClosureCompiler::compile
*/
public function testCompile3()
{
$root = vfsStreamWrapper::getRoot();
$root->addChild(vfsStream::newFile('test.js'));
$root->addChild(vfsStream::newFile('compiled.js'));
$dir = vfsStream::url('tmp');
$this->object->setSourceBaseDir($dir);
$this->object->setSourceFiles(array('test.js'));
$this->object->setTargetBaseDir($dir);
$result = $this->object->compile();
$result = $this->object->getConfig();
$this->assertEquals('vfs://tmp/compiled.js', $result['targetFileName']);
}
}