Mercurial > piecrust2

annotate piecrust/processing/compass.py @ 549:7453baeb0839

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bake: Set the flags, don't combine. We don't want to combine old flags with new ones, especially if something went different between the last bake and the current one.
author Ludovic Chabant <ludovic@chabant.com>
date Tue, 04 Aug 2015 21:21:08 -0700
parents c4b3a7fd2f87
children 4850f8c21b6e
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rev   line source
196
154b8df04829 processing: Add Compass and Sass processors.
Ludovic Chabant <ludovic@chabant.com>
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1 import os
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2 import os.path
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3 import logging
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4 import subprocess
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5 from piecrust.processing.base import Processor, PRIORITY_FIRST
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6 from piecrust.uriutil import multi_replace
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7
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8
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9 logger = logging.getLogger(__name__)
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10
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11
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12 class CompassProcessor(Processor):
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13 PROCESSOR_NAME = 'compass'
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14
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15 STATE_UNKNOWN = 0
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16 STATE_INACTIVE = 1
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17 STATE_ACTIVE = 2
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18
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19 def __init__(self):
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20 super(CompassProcessor, self).__init__()
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21 # Using a high priority is needed to get to the `.scss` files before
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22 # the Sass processor.
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23 self.priority = PRIORITY_FIRST
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24 self.is_bypassing_structured_processing = True
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25 self.is_delegating_dependency_check = False
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26 self._state = self.STATE_UNKNOWN
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27
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28 def initialize(self, app):
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29 super(CompassProcessor, self).initialize(app)
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30
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31 def onPipelineStart(self, pipeline):
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32 super(CompassProcessor, self).onPipelineStart(pipeline)
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33 self._maybeActivate(pipeline)
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34
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35 def onPipelineEnd(self, pipeline):
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36 super(CompassProcessor, self).onPipelineEnd(pipeline)
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37 self._maybeRunCompass(pipeline)
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38
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39 def matches(self, path):
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40 if self._state != self.STATE_ACTIVE:
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41 return False
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42
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43 _, ext = os.path.splitext(path)
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44 return ext == '.scss' or ext == '.sass'
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45
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46 def getDependencies(self, path):
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47 raise Exception("Compass processor should handle dependencies by "
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48 "itself.")
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49
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50 def getOutputFilenames(self, filename):
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51 raise Exception("Compass processor should handle outputs by itself.")
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52
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53 def process(self, path, out_dir):
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54 if path.startswith(self.app.theme_dir):
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55 if not self._runInTheme:
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56 logger.debug("Scheduling Compass execution in theme directory "
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57 "after the pipeline is done.")
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58 self._runInTheme = True
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59 else:
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60 if not self._runInSite:
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61 logger.debug("Scheduling Compass execution after the pipeline "
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62 "is done.")
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63 self._runInSite = True
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64
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65 def _maybeActivate(self, pipeline):
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66 if self._state != self.STATE_UNKNOWN:
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67 return
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68
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69 config = self.app.config.get('compass')
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70 if config is None or not config.get('enable'):
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71 logger.debug("Compass processing is disabled (set "
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72 "`compass/enable` to `true` to enable it).")
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73 self._state = self.STATE_INACTIVE
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74 return
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75
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76 logger.debug("Activating Compass processing for SCSS/SASS files.")
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77 self._state = self.STATE_ACTIVE
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78
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79 bin_path = config.get('bin', 'compass')
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80
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81 config_path = config.get('config_path', 'config.rb')
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82 config_path = os.path.join(self.app.root_dir, config_path)
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83 if not os.path.exists(config_path):
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84 raise Exception("Can't find Compass configuration file: %s" %
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85 config_path)
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86 self._args = '%s compile --config "%s"' % (bin_path, config_path)
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87
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88 frameworks = config.get('frameworks', [])
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89 if not isinstance(frameworks, list):
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90 frameworks = frameworks.split(',')
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91 for f in frameworks:
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92 self._args += ' --load %s' % f
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93
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94 custom_args = config.get('options')
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95 if custom_args:
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96 self._args += ' ' + custom_args
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97
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98 out_dir = pipeline.out_dir
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99 tmp_dir = os.path.join(pipeline.tmp_dir, 'compass')
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100 self._args = multi_replace(
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101 self._args,
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102 {'%out_dir%': out_dir,
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103 '%tmp_dir%': tmp_dir})
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104
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105 self._runInSite = False
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106 self._runInTheme = False
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107
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108 def _maybeRunCompass(self, pipeline):
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109 if self._state != self.STATE_ACTIVE:
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110 return
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111
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112 logger.debug("Running Compass with:")
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113 logger.debug(self._args)
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114
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115 prev_cwd = os.getcwd()
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116 os.chdir(self.app.root_dir)
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117 try:
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118 retcode = subprocess.call(self._args, shell=True)
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119 except FileNotFoundError as ex:
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120 logger.error("Tried running Compass with command: %s" %
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121 self._args)
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122 raise Exception("Error running Compass. "
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123 "Did you install it?") from ex
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124 finally:
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125 os.chdir(prev_cwd)
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126
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127 if retcode != 0:
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128 raise Exception("Error occured in Compass. Please check "
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129 "log messages above for more information.")
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130 return True
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131