#!/usr/bin/env php
<?php

/*
* This file is part of Mustache.php.
*
* (c) 2010-2015 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

/**
* A shell script to create a single-file class cache of the entire Mustache
* library.
*
* $ bin/build_bootstrap.php
*
* ... will create a `mustache.php` bootstrap file in the project directory,
* containing all Mustache library classes. This file can then be included in
* your project, rather than requiring the Mustache Autoloader.
*/
$baseDir = realpath(dirname(__FILE__) . '/..');

require $baseDir . '/src/Mustache/Autoloader.php';
Mustache_Autoloader::register();

// delete the old file
$file = $baseDir . '/mustache.php';
if (file_exists($file)) {
unlink($file);
}

// and load the new one
SymfonyClassCollectionLoader::load(array(
'Mustache_Engine',
'Mustache_Cache',
'Mustache_Cache_AbstractCache',
'Mustache_Cache_FilesystemCache',
'Mustache_Cache_NoopCache',
'Mustache_Compiler',
'Mustache_Context',
'Mustache_Exception',
'Mustache_Exception_InvalidArgumentException',
'Mustache_Exception_LogicException',
'Mustache_Exception_RuntimeException',
'Mustache_Exception_SyntaxException',
'Mustache_Exception_UnknownFilterException',
'Mustache_Exception_UnknownHelperException',
'Mustache_Exception_UnknownTemplateException',
'Mustache_HelperCollection',
'Mustache_LambdaHelper',
'Mustache_Loader',
'Mustache_Loader_ArrayLoader',
'Mustache_Loader_CascadingLoader',
'Mustache_Loader_FilesystemLoader',
'Mustache_Loader_InlineLoader',
'Mustache_Loader_MutableLoader',
'Mustache_Loader_StringLoader',
'Mustache_Logger',
'Mustache_Logger_AbstractLogger',
'Mustache_Logger_StreamLogger',
'Mustache_Parser',
'Mustache_Template',
'Mustache_Tokenizer',
), dirname($file), basename($file, '.php'));

/**
* SymfonyClassCollectionLoader.
*
* Based heavily on the Symfony ClassCollectionLoader component, with all
* the unnecessary bits removed.
*
* @license http://www.opensource.org/licenses/MIT
* @author Fabien Potencier <fabien@symfony.com>
*/
class SymfonyClassCollectionLoader
{
private static $loaded;

const HEADER = <<<'EOS'
<?php

/*
* This file is part of Mustache.php.
*
* (c) 2010-%d Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
EOS;

/**
* Loads a list of classes and caches them in one big file.
*
* @param array $classes An array of classes to load
* @param string $cacheDir A cache directory
* @param string $name The cache name prefix
* @param string $extension File extension of the resulting file
*
* @throws InvalidArgumentException When class can't be loaded
*/
public static function load(array $classes, $cacheDir, $name, $extension = '.php')
{
// each $name can only be loaded once per PHP process
if (isset(self::$loaded[$name])) {
return;
}

self::$loaded[$name] = true;

$content = '';
foreach ($classes as $class) {
if (!class_exists($class) && !interface_exists($class) && (!function_exists('trait_exists') || !trait_exists($class))) {
throw new InvalidArgumentException(sprintf('Unable to load class "%s"', $class));
}

$r = new ReflectionClass($class);
$content .= preg_replace(array('/^\s*<\?php/', '/\?>\s*$/'), '', file_get_contents($r->getFileName()));
}

$cache = $cacheDir . '/' . $name . $extension;
$header = sprintf(self::HEADER, strftime('%Y'));
self::writeCacheFile($cache, $header . substr(self::stripComments('<?php ' . $content), 5));
}

/**
* Writes a cache file.
*
* @param string $file Filename
* @param string $content Temporary file content
*
* @throws RuntimeException when a cache file cannot be written
*/
private static function writeCacheFile($file, $content)
{
$tmpFile = tempnam(dirname($file), basename($file));
if (false !== @file_put_contents($tmpFile, $content) && @rename($tmpFile, $file)) {
chmod($file, 0666 & ~umask());

return;
}

throw new RuntimeException(sprintf('Failed to write cache file "%s".', $file));
}

/**
* Removes comments from a PHP source string.
*
* We don't use the PHP php_strip_whitespace() function
* as we want the content to be readable and well-formatted.
*
* @param string $source A PHP string
*
* @return string The PHP string with the comments removed
*/
private static function stripComments($source)
{
if (!function_exists('token_get_all')) {
return $source;
}

$output = '';
foreach (token_get_all($source) as $token) {
if (is_string($token)) {
$output .= $token;
} elseif (!in_array($token[0], array(T_COMMENT, T_DOC_COMMENT))) {
$output .= $token[1];
}
}

// replace multiple new lines with a single newline
$output = preg_replace(array('/\s+$/Sm', '/\n+/S'), "\n", $output);

return $output;
}
}