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annotate piecrust/pipelines/asset.py @ 1051:971b4d67e82a

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serve: Fix problems with assets disappearing between servings. When an asset file changes, its source's pipeline is re-run. But that created a bake record that only had that pipeline's output, so the other outputs were incorrectly considered empty and therefore any stray files were removed. Now we copy over bake records for the pipelines we don't run.
author Ludovic Chabant <ludovic@chabant.com>
date Fri, 26 Jan 2018 18:05:02 -0800
parents 1a7f3ae09c53
children c8fb7b024faa
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1 import os
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2 import os.path
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3 import re
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4 import logging
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5 from piecrust.pipelines._procrecords import (
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6 AssetPipelineRecordEntry,
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7 add_asset_job_result, merge_job_result_into_record_entry)
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8 from piecrust.pipelines._proctree import (
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9 ProcessingTreeBuilder, ProcessingTreeRunner,
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10 get_node_name_tree, print_node,
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11 STATE_DIRTY)
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12 from piecrust.pipelines.base import ContentPipeline
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13 from piecrust.processing.base import ProcessorContext
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14 from piecrust.sources.fs import FSContentSourceBase
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15
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16
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17 logger = logging.getLogger(__name__)
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19
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20 class AssetPipeline(ContentPipeline):
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21 PIPELINE_NAME = 'asset'
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22 RECORD_ENTRY_CLASS = AssetPipelineRecordEntry
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23
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24 def __init__(self, source, ppctx):
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25 if not isinstance(source, FSContentSourceBase):
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26 raise Exception(
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27 "The asset pipeline only support file-system sources.")
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28
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29 super().__init__(source, ppctx)
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30 self._ignore_patterns = []
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31 self._processors = None
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32 self._base_dir = source.fs_endpoint_path
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33
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34 def initialize(self):
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35 # Get the list of processors for this run.
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36 processors = self.app.plugin_loader.getProcessors()
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37 for flt in [
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38 self.app.config.get('pipelines/asset/processors'),
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39 self.source.config.get('processors')]:
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40 if flt is not None:
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41 logger.debug("Filtering processors to: %s" % flt)
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42 processors = get_filtered_processors(processors, flt)
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43
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44 # Invoke pre-processors.
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45 proc_ctx = ProcessorContext(self)
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46 for proc in processors:
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47 proc.onPipelineStart(proc_ctx)
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48
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49 # Add any extra processors registered in the `onPipelineStart` step.
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50 processors += proc_ctx.extra_processors
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51
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52 # Sort our processors by priority.
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53 processors.sort(key=lambda p: p.priority)
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54
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55 # Ok, that's the list of processors for this run.
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56 self._processors = processors
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57
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58 # Pre-processors can define additional ignore patterns so let's
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59 # add them to what we had already.
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60 ignores = self.app.config.get('pipelines/asset/ignore', [])
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61 ignores += proc_ctx.ignore_patterns
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62 self._ignore_patterns += make_re(ignores)
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63
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64 # Register timers.
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65 stats = self.app.env.stats
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66 stats.registerTimer('BuildProcessingTree', raise_if_registered=False)
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67 stats.registerTimer('RunProcessingTree', raise_if_registered=False)
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68
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69 def run(self, job, ctx, result):
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70 # Create the result stuff.
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71 item_spec = job['job_spec'][1]
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72 add_asset_job_result(result)
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73 result['item_spec'] = item_spec
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74
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75 # See if we need to ignore this item.
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76 rel_path = os.path.relpath(item_spec, self._base_dir)
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77 if re_matchany(rel_path, self._ignore_patterns):
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78 return
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79
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80 # Build the processing tree for this job.
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81 stats = self.app.env.stats
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82 with stats.timerScope('BuildProcessingTree'):
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83 builder = ProcessingTreeBuilder(self._processors)
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84 tree_root = builder.build(rel_path)
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85 result['flags'] |= AssetPipelineRecordEntry.FLAG_PREPARED
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86
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87 # Prepare and run the tree.
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88 out_dir = self.ctx.out_dir
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89 print_node(tree_root, recursive=True)
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90 leaves = tree_root.getLeaves()
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91 result['out_paths'] = [os.path.join(out_dir, l.path)
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92 for l in leaves]
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93 result['proc_tree'] = get_node_name_tree(tree_root)
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94 if tree_root.getProcessor().is_bypassing_structured_processing:
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95 result['flags'] |= (
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96 AssetPipelineRecordEntry.FLAG_BYPASSED_STRUCTURED_PROCESSING)
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97
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98 if self.ctx.force:
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99 tree_root.setState(STATE_DIRTY, True)
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100
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101 with stats.timerScope('RunProcessingTree'):
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102 runner = ProcessingTreeRunner(
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103 self._base_dir, self.tmp_dir, out_dir)
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104 if runner.processSubTree(tree_root):
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105 result['flags'] |= (
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106 AssetPipelineRecordEntry.FLAG_PROCESSED)
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107
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108 def handleJobResult(self, result, ctx):
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109 entry = self.createRecordEntry(result['item_spec'])
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110 merge_job_result_into_record_entry(entry, result)
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111 ctx.record.addEntry(entry)
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112
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113 def getDeletions(self, ctx):
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114 for prev, cur in ctx.record_history.diffs:
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115 if prev and not cur:
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116 for p in prev.out_paths:
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117 yield (p, 'previous asset was removed')
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118 elif prev and cur and cur.was_processed_successfully:
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119 diff = set(prev.out_paths) - set(cur.out_paths)
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120 for p in diff:
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121 yield (p, 'asset changed outputs')
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122
853
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123 def collapseRecords(self, ctx):
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124 for prev, cur in ctx.record_history.diffs:
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125 if prev and cur and not cur.was_processed:
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126 # This asset wasn't processed, so the information from
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127 # last time is still valid.
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128 cur.flags = (
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129 (prev.flags & ~AssetPipelineRecordEntry.FLAG_PROCESSED) |
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130 AssetPipelineRecordEntry.FLAG_COLLAPSED_FROM_LAST_RUN)
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131 cur.out_paths = list(prev.out_paths)
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132 cur.errors = list(prev.errors)
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133
854
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134 def shutdown(self):
853
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135 # Invoke post-processors.
854
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136 proc_ctx = ProcessorContext(self)
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137 for proc in self._processors:
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138 proc.onPipelineEnd(proc_ctx)
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139
852
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140
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141 split_processor_names_re = re.compile(r'[ ,]+')
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142
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143
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144 def get_filtered_processors(processors, authorized_names):
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145 if not authorized_names or authorized_names == 'all':
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146 return processors
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147
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148 if isinstance(authorized_names, str):
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149 authorized_names = split_processor_names_re.split(authorized_names)
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150
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151 procs = []
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152 has_star = 'all' in authorized_names
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153 for p in processors:
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154 for name in authorized_names:
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155 if name == p.PROCESSOR_NAME:
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156 procs.append(p)
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157 break
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158 if name == ('-%s' % p.PROCESSOR_NAME):
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159 break
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160 else:
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161 if has_star:
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diff changeset
162 procs.append(p)
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163 return procs
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164
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165
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166 def make_re(patterns):
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167 re_patterns = []
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diff changeset
168 for pat in patterns:
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parents:
diff changeset
169 if pat[0] == '/' and pat[-1] == '/' and len(pat) > 2:
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parents:
diff changeset
170 re_patterns.append(pat[1:-1])
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diff changeset
171 else:
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diff changeset
172 escaped_pat = (
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diff changeset
173 re.escape(pat)
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diff changeset
174 .replace(r'\*', r'[^/\\]*')
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175 .replace(r'\?', r'[^/\\]'))
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parents:
diff changeset
176 re_patterns.append(escaped_pat)
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diff changeset
177 return [re.compile(p) for p in re_patterns]
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178
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diff changeset
179
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diff changeset
180 def re_matchany(rel_path, patterns):
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parents:
diff changeset
181 # skip patterns use a forward slash regardless of the platform.
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parents:
diff changeset
182 rel_path = rel_path.replace('\\', '/')
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parents:
diff changeset
183 for pattern in patterns:
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parents:
diff changeset
184 if pattern.search(rel_path):
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185 return True
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parents:
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186 return False
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187
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diff changeset
188
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diff changeset
189 re_ansicolors = re.compile('\033\\[\d+m')
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parents:
diff changeset
190
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parents:
diff changeset
191
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parents:
diff changeset
192 def _get_errors(ex, strip_colors=False):
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parents:
diff changeset
193 errors = []
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parents:
diff changeset
194 while ex is not None:
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parents:
diff changeset
195 msg = str(ex)
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parents:
diff changeset
196 if strip_colors:
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parents:
diff changeset
197 msg = re_ansicolors.sub('', msg)
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parents:
diff changeset
198 errors.append(msg)
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parents:
diff changeset
199 ex = ex.__cause__
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
200 return errors
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
201