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annotate piecrust/pipelines/asset.py @ 876:d1095774bfcf

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refactor: Fix some issues with record/cache entry collisions, add counters.
author Ludovic Chabant <ludovic@chabant.com>
date Thu, 15 Jun 2017 07:33:40 -0700
parents 08e02c2a2a1a
children 45ad976712ec
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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 AssetPipelineRecordEntry
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6 from piecrust.pipelines._proctree import (
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7 ProcessingTreeBuilder, ProcessingTreeRunner,
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8 get_node_name_tree, print_node,
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9 STATE_DIRTY)
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10 from piecrust.pipelines.base import ContentPipeline
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11 from piecrust.processing.base import ProcessorContext
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12 from piecrust.sources.fs import FSContentSourceBase
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13
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14
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15 logger = logging.getLogger(__name__)
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16
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17
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18 class AssetPipeline(ContentPipeline):
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19 PIPELINE_NAME = 'asset'
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20 RECORD_ENTRY_CLASS = AssetPipelineRecordEntry
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21
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22 def __init__(self, source, ppctx):
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23 if not isinstance(source, FSContentSourceBase):
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24 raise Exception(
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25 "The asset pipeline only support file-system sources.")
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26
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27 super().__init__(source, ppctx)
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28 self.enabled_processors = None
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29 self.ignore_patterns = []
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30 self._processors = None
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31 self._base_dir = source.fs_endpoint_path
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32
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33 def initialize(self):
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34 # Get the list of processors for this run.
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35 processors = self.app.plugin_loader.getProcessors()
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36 if self.enabled_processors is not None:
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37 logger.debug("Filtering processors to: %s" %
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38 self.enabled_processors)
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39 processors = get_filtered_processors(processors,
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40 self.enabled_processors)
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41
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42 # Invoke pre-processors.
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43 proc_ctx = ProcessorContext(self)
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44 for proc in processors:
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45 proc.onPipelineStart(proc_ctx)
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46
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47 # Add any extra processors registered in the `onPipelineStart` step.
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48 processors += proc_ctx.extra_processors
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49
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50 # Sort our processors by priority.
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51 processors.sort(key=lambda p: p.priority)
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52
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53 # Ok, that's the list of processors for this run.
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54 self._processors = processors
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55
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56 # Pre-processors can define additional ignore patterns so let's
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57 # add them to what we had already.
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58 self.ignore_patterns += make_re(proc_ctx.ignore_patterns)
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59
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60 # Register timers.
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61 stats = self.app.env.stats
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62 stats.registerTimer('BuildProcessingTree', raise_if_registered=False)
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63 stats.registerTimer('RunProcessingTree', raise_if_registered=False)
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64
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65 def run(self, job, ctx, result):
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66 # See if we need to ignore this item.
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67 rel_path = os.path.relpath(job.content_item.spec, self._base_dir)
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68 if re_matchany(rel_path, self.ignore_patterns):
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69 return
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70
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71 record_entry = result.record_entry
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72 stats = self.app.env.stats
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73 out_dir = self.ctx.out_dir
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74
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75 # Build the processing tree for this job.
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76 with stats.timerScope('BuildProcessingTree'):
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77 builder = ProcessingTreeBuilder(self._processors)
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78 tree_root = builder.build(rel_path)
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79 record_entry.flags |= AssetPipelineRecordEntry.FLAG_PREPARED
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80
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81 # Prepare and run the tree.
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82 print_node(tree_root, recursive=True)
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83 leaves = tree_root.getLeaves()
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84 record_entry.out_paths = [os.path.join(out_dir, l.path)
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85 for l in leaves]
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86 record_entry.proc_tree = get_node_name_tree(tree_root)
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87 if tree_root.getProcessor().is_bypassing_structured_processing:
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88 record_entry.flags |= (
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89 AssetPipelineRecordEntry.FLAG_BYPASSED_STRUCTURED_PROCESSING)
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90
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91 if self.ctx.force:
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92 tree_root.setState(STATE_DIRTY, True)
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93
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94 with stats.timerScope('RunProcessingTree'):
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95 runner = ProcessingTreeRunner(
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96 self._base_dir, self.tmp_dir, out_dir)
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97 if runner.processSubTree(tree_root):
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98 record_entry.flags |= (
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99 AssetPipelineRecordEntry.FLAG_PROCESSED)
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100
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101 def getDeletions(self, ctx):
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102 for prev, cur in ctx.record_history.diffs:
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103 if prev and not cur:
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104 for p in prev.out_paths:
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105 yield (p, 'previous asset was removed')
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106 elif prev and cur and cur.was_processed_successfully:
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107 diff = set(prev.out_paths) - set(cur.out_paths)
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108 for p in diff:
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109 yield (p, 'asset changed outputs')
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110
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111 def collapseRecords(self, ctx):
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112 for prev, cur in ctx.record_history.diffs:
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113 if prev and cur and not cur.was_processed:
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114 # This asset wasn't processed, so the information from
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115 # last time is still valid.
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116 cur.flags = (
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117 (prev.flags & ~AssetPipelineRecordEntry.FLAG_PROCESSED) |
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118 AssetPipelineRecordEntry.FLAG_COLLAPSED_FROM_LAST_RUN)
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119 cur.out_paths = list(prev.out_paths)
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120 cur.errors = list(prev.errors)
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121
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122 def shutdown(self):
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123 # Invoke post-processors.
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124 proc_ctx = ProcessorContext(self)
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125 for proc in self._processors:
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126 proc.onPipelineEnd(proc_ctx)
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127
852
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128
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129 split_processor_names_re = re.compile(r'[ ,]+')
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130
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131
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132 def get_filtered_processors(processors, authorized_names):
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133 if not authorized_names or authorized_names == 'all':
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134 return processors
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135
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136 if isinstance(authorized_names, str):
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137 authorized_names = split_processor_names_re.split(authorized_names)
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138
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139 procs = []
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140 has_star = 'all' in authorized_names
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141 for p in processors:
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142 for name in authorized_names:
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143 if name == p.PROCESSOR_NAME:
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144 procs.append(p)
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145 break
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146 if name == ('-%s' % p.PROCESSOR_NAME):
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147 break
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148 else:
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149 if has_star:
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150 procs.append(p)
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151 return procs
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152
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153
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154 def make_re(patterns):
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155 re_patterns = []
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156 for pat in patterns:
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157 if pat[0] == '/' and pat[-1] == '/' and len(pat) > 2:
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158 re_patterns.append(pat[1:-1])
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159 else:
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160 escaped_pat = (
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161 re.escape(pat)
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162 .replace(r'\*', r'[^/\\]*')
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163 .replace(r'\?', r'[^/\\]'))
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164 re_patterns.append(escaped_pat)
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165 return [re.compile(p) for p in re_patterns]
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166
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167
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168 def re_matchany(rel_path, patterns):
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169 # skip patterns use a forward slash regardless of the platform.
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170 rel_path = rel_path.replace('\\', '/')
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171 for pattern in patterns:
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172 if pattern.search(rel_path):
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173 return True
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174 return False
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175
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176
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177 re_ansicolors = re.compile('\033\\[\d+m')
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178
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179
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180 def _get_errors(ex, strip_colors=False):
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181 errors = []
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182 while ex is not None:
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183 msg = str(ex)
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184 if strip_colors:
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185 msg = re_ansicolors.sub('', msg)
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186 errors.append(msg)
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187 ex = ex.__cause__
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188 return errors
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189