Mercurial > piecrust2

annotate piecrust/processing/sass.py @ 1145:e94737572542

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serve: Fix an issue where false positive matches were rendered as the requested page. Now we try to render the page, but also try to detect for the most common "empty" pages.
author Ludovic Chabant <ludovic@chabant.com>
date Tue, 05 Jun 2018 22:08:51 -0700
parents a3dec0fbd9ce
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 import os
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2 import os.path
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3 import json
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4 import hashlib
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5 import logging
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6 import platform
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7 import subprocess
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8 from piecrust.processing.base import SimpleFileProcessor, FORCE_BUILD
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9
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10
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11 logger = logging.getLogger(__name__)
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12
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13
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14 class SassProcessor(SimpleFileProcessor):
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15 PROCESSOR_NAME = 'sass'
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16
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17 def __init__(self):
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18 super(SassProcessor, self).__init__(
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19 extensions={'scss': 'css', 'sass': 'css'})
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20 self._conf = None
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21 self._map_dir = None
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22
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23 def initialize(self, app):
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24 super(SassProcessor, self).initialize(app)
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25
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26 def onPipelineStart(self, ctx):
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27 super(SassProcessor, self).onPipelineStart(ctx)
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28
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29 self._map_dir = os.path.join(ctx.tmp_dir, 'sass')
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30 if ctx.is_main_process:
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31 if not os.path.isdir(self._map_dir):
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32 os.makedirs(self._map_dir)
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33
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34 # Ignore include-only Sass files.
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35 ctx.ignore_patterns += ['_*.scss', '_*.sass']
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36
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37 def getDependencies(self, path):
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38 if _is_include_only(path):
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39 raise Exception("Include only Sass files should be ignored!")
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40
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41 map_path = self._getMapPath(path)
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42 try:
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43 with open(map_path, 'r') as f:
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44 dep_map = json.load(f)
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45 except IOError:
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46 # Map file not found... rebuild.
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47 logger.debug("No map file found for Sass file '%s' at '%s'. "
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48 "Rebuilding." % (path, map_path))
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49 return FORCE_BUILD
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50
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51 if dep_map.get('version') != 3:
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52 logger.warning("Unknown Sass map version. Rebuilding.")
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53 return FORCE_BUILD
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54
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55 sources = dep_map.get('sources', [])
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56 deps = list(map(_clean_scheme, sources))
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57 return deps
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58
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59 def _doProcess(self, in_path, out_path):
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60 self._ensureInitialized()
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61
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62 if _is_include_only(in_path):
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63 raise Exception("Include only Sass files should be ignored!")
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64
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65 sourcemap = 'none'
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66 if self.app.cache.enabled:
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67 sourcemap = 'file'
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68
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69 args = [self._conf['bin'],
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70 '--sourcemap=%s' % sourcemap,
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71 '--style', self._conf['style']]
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72
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73 cache_dir = self._conf['cache_dir']
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74 if cache_dir:
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75 args += ['--cache-location', cache_dir]
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76 else:
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77 args += ['--no-cache']
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78
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79 for lp in self._conf['load_paths']:
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80 args += ['-I', lp]
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81
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82 args += self._conf['options']
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83 args += [in_path, out_path]
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84 logger.debug("Processing Sass file: %s" % args)
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85
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86 try:
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87 retcode = subprocess.call(args)
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88 except FileNotFoundError as ex:
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89 logger.error("Tried running Sass processor with command: %s" %
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90 args)
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91 raise Exception("Error running Sass processor. "
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92 "Did you install it?") from ex
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93
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94 # The sourcemap is generated next to the CSS file... there doesn't
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95 # seem to be any option to override that, sadly... so we need to move
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96 # it to the cache directory.
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97 if self.app.cache.enabled:
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98 src_map_file = out_path + '.map'
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99 dst_map_file = self._getMapPath(in_path)
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100 if os.path.exists(dst_map_file):
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101 os.remove(dst_map_file)
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102 os.rename(src_map_file, dst_map_file)
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103
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104 if retcode != 0:
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105 raise Exception("Error occured in Sass compiler. Please check "
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106 "log messages above for more information.")
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107
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108 return True
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109
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110 def _ensureInitialized(self):
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111 if self._conf is not None:
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112 return
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113
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114 bin_name = 'scss'
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115 if platform.system() == 'Windows':
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116 bin_name += '.cmd'
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117
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118 self._conf = self.app.config.get('sass') or {}
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119 self._conf.setdefault('bin', bin_name)
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120 self._conf.setdefault('style', 'nested')
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121 self._conf.setdefault('load_paths', [])
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122 if not isinstance(self._conf['load_paths'], list):
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123 raise Exception("The `sass/load_paths` configuration setting "
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124 "must be an array of paths.")
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125 self._conf.setdefault('options', [])
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126 if not isinstance(self._conf['options'], list):
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127 raise Exception("The `sass/options` configuration setting "
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128 "must be an array of arguments.")
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129
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130 app_root_dir = self.app.root_dir
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131 load_paths = list(self._conf['load_paths'])
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132 for i, lp in enumerate(load_paths):
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133 self._conf['load_paths'][i] = os.path.join(app_root_dir, lp)
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134
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135 cache_dir = None
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136 if self.app.cache.enabled:
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137 cache_dir = os.path.join(self.app.cache_dir, 'sass')
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138 self._conf.setdefault('cache_dir', cache_dir)
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139
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140 def _getMapPath(self, path):
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141 map_name = "%s_%s.map" % (
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142 os.path.basename(path),
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143 hashlib.md5(path.encode('utf8')).hexdigest())
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144 map_path = os.path.join(self._map_dir, map_name)
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145 return map_path
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146
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147
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148 def _clean_scheme(p):
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149 if p.startswith('file://'):
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150 return p[7:]
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151 return p
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152
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153
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154 def _is_include_only(path):
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155 name = os.path.basename(path)
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156 return len(name) > 0 and name[0] == '_'
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157