1 | <?php |
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2 | |
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3 | /* |
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4 | * This file is part of the Assetic package, an OpenSky project. |
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5 | * |
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6 | * (c) 2010-2012 OpenSky Project Inc |
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7 | * |
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8 | * For the full copyright and license information, please view the LICENSE |
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9 | * file that was distributed with this source code. |
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10 | */ |
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11 | |
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12 | namespace Assetic\Filter; |
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13 | |
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14 | use Assetic\Asset\AssetInterface; |
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15 | use Assetic\Exception\FilterException; |
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16 | use Symfony\Component\Process\ProcessBuilder; |
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17 | |
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18 | /** |
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19 | * Runs assets through Sprockets. |
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20 | * |
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21 | * Requires Sprockets 1.0.x. |
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22 | * |
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23 | * @link http://getsprockets.org/ |
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24 | * @link http://github.com/sstephenson/sprockets/tree/1.0.x |
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25 | * |
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26 | * @author Kris Wallsmith <kris.wallsmith@gmail.com> |
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27 | */ |
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28 | class SprocketsFilter implements FilterInterface |
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29 | { |
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30 | private $sprocketsLib; |
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31 | private $rubyBin; |
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32 | private $includeDirs; |
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33 | private $assetRoot; |
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34 | |
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35 | /** |
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36 | * Constructor. |
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37 | * |
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38 | * @param string $sprocketsLib Path to the Sprockets lib/ directory |
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39 | * @param string $rubyBin Path to the ruby binary |
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40 | */ |
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41 | public function __construct($sprocketsLib = null, $rubyBin = '/usr/bin/ruby') |
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42 | { |
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43 | $this->sprocketsLib = $sprocketsLib; |
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44 | $this->rubyBin = $rubyBin; |
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45 | $this->includeDirs = array(); |
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46 | } |
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47 | |
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48 | public function addIncludeDir($directory) |
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49 | { |
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50 | $this->includeDirs[] = $directory; |
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51 | } |
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52 | |
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53 | public function setAssetRoot($assetRoot) |
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54 | { |
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55 | $this->assetRoot = $assetRoot; |
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56 | } |
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57 | |
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58 | /** |
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59 | * Hack around a bit, get the job done. |
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60 | */ |
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61 | public function filterLoad(AssetInterface $asset) |
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62 | { |
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63 | static $format = <<<'EOF' |
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64 | #!/usr/bin/env ruby |
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65 | |
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66 | require %s |
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67 | %s |
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68 | options = { :load_path => [], |
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69 | :source_files => [%s], |
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70 | :expand_paths => false } |
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71 | |
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72 | %ssecretary = Sprockets::Secretary.new(options) |
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73 | secretary.install_assets if options[:asset_root] |
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74 | print secretary.concatenation |
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75 | |
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76 | EOF; |
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77 | |
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78 | $more = ''; |
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79 | |
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80 | foreach ($this->includeDirs as $directory) { |
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81 | $more .= 'options[:load_path] << '.var_export($directory, true)."\n"; |
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82 | } |
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83 | |
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84 | if (null !== $this->assetRoot) { |
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85 | $more .= 'options[:asset_root] = '.var_export($this->assetRoot, true)."\n"; |
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86 | } |
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87 | |
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88 | if ($more) { |
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89 | $more .= "\n"; |
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90 | } |
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91 | |
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92 | $tmpAsset = tempnam(sys_get_temp_dir(), 'assetic_sprockets'); |
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93 | file_put_contents($tmpAsset, $asset->getContent()); |
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94 | |
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95 | $input = tempnam(sys_get_temp_dir(), 'assetic_sprockets'); |
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96 | file_put_contents($input, sprintf($format, |
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97 | $this->sprocketsLib |
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98 | ? sprintf('File.join(%s, \'sprockets\')', var_export($this->sprocketsLib, true)) |
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99 | : '\'sprockets\'', |
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100 | $this->getHack($asset), |
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101 | var_export($tmpAsset, true), |
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102 | $more |
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103 | )); |
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104 | |
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105 | $pb = new ProcessBuilder(array( |
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106 | $this->rubyBin, |
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107 | $input, |
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108 | )); |
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109 | |
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110 | $proc = $pb->getProcess(); |
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111 | $code = $proc->run(); |
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112 | unlink($tmpAsset); |
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113 | unlink($input); |
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114 | |
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115 | if (0 < $code) { |
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116 | throw FilterException::fromProcess($proc)->setInput($asset->getContent()); |
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117 | } |
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118 | |
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119 | $asset->setContent($proc->getOutput()); |
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120 | } |
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121 | |
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122 | public function filterDump(AssetInterface $asset) |
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123 | { |
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124 | } |
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125 | |
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126 | private function getHack(AssetInterface $asset) |
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127 | { |
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128 | static $format = <<<'EOF' |
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129 | |
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130 | module Sprockets |
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131 | class Preprocessor |
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132 | protected |
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133 | def pathname_for_relative_require_from(source_line) |
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134 | Sprockets::Pathname.new(@environment, File.join(%s, location_from(source_line))) |
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135 | end |
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136 | end |
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137 | end |
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138 | |
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139 | EOF; |
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140 | |
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141 | $root = $asset->getSourceRoot(); |
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142 | $path = $asset->getSourcePath(); |
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143 | |
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144 | if ($root && $path) { |
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145 | return sprintf($format, var_export(dirname($root.'/'.$path), true)); |
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146 | } |
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147 | } |
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148 | } |
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