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annotate piecrust/pipelines/asset.py @ 853:f070a4fc033c

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core: Continue PieCrust3 refactor, simplify pages. The asset pipeline is still the only function pipeline at this point. * No more `QualifiedPage`, and several other pieces of code deleted. * Data providers are simpler and more focused. For instance, the page iterator doesn't try to support other types of items. * Route parameters are proper known source metadata to remove the confusion between the two. * Make the baker and pipeline more correctly manage records and record histories. * Add support for record collapsing and deleting stale outputs in the asset pipeline.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 21 May 2017 00:06:59 -0700
parents 4850f8c21b6e
children 08e02c2a2a1a
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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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22 def __init__(self, source):
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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)
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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, ctx):
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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, ctx)
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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, content_item, 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(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
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74 # Build the processing tree for this job.
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75 with stats.timerScope('BuildProcessingTree'):
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76 builder = ProcessingTreeBuilder(self._processors)
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77 tree_root = builder.build(rel_path)
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78 record_entry.flags |= AssetPipelineRecordEntry.FLAG_PREPARED
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79
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80 # Prepare and run the tree.
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81 print_node(tree_root, recursive=True)
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82 leaves = tree_root.getLeaves()
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83 record_entry.out_paths = [os.path.join(ctx.out_dir, l.path)
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84 for l in leaves]
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85 record_entry.proc_tree = get_node_name_tree(tree_root)
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86 if tree_root.getProcessor().is_bypassing_structured_processing:
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87 record_entry.flags |= (
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88 AssetPipelineRecordEntry.FLAG_BYPASSED_STRUCTURED_PROCESSING)
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89
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90 if ctx.force:
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91 tree_root.setState(STATE_DIRTY, True)
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92
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93 with stats.timerScope('RunProcessingTree'):
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94 runner = ProcessingTreeRunner(
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95 self._base_dir, self.tmp_dir, ctx.out_dir)
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96 if runner.processSubTree(tree_root):
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97 record_entry.flags |= (
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98 AssetPipelineRecordEntry.FLAG_PROCESSED)
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99
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100 def getDeletions(self, ctx):
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101 for prev, cur in ctx.record_history.diffs:
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102 if prev and not cur:
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103 for p in prev.out_paths:
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104 yield (p, 'previous asset was removed')
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105 elif prev and cur and cur.was_processed_successfully:
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106 diff = set(prev.out_paths) - set(cur.out_paths)
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107 for p in diff:
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108 yield (p, 'asset changed outputs')
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109
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110 def collapseRecords(self, ctx):
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111 for prev, cur in ctx.record_history.diffs:
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112 if prev and cur and not cur.was_processed:
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113 # This asset wasn't processed, so the information from
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114 # last time is still valid.
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115 cur.flags = (
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116 (prev.flags & ~AssetPipelineRecordEntry.FLAG_PROCESSED) |
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117 AssetPipelineRecordEntry.FLAG_COLLAPSED_FROM_LAST_RUN)
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118 cur.out_paths = list(prev.out_paths)
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119 cur.errors = list(prev.errors)
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120
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121 def shutdown(self, ctx):
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122 # Invoke post-processors.
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123 proc_ctx = ProcessorContext(self, ctx)
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124 for proc in self._processors:
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125 proc.onPipelineEnd(proc_ctx)
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126
852
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127
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128 split_processor_names_re = re.compile(r'[ ,]+')
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129
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130
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131 def get_filtered_processors(processors, authorized_names):
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132 if not authorized_names or authorized_names == 'all':
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133 return processors
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134
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135 if isinstance(authorized_names, str):
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136 authorized_names = split_processor_names_re.split(authorized_names)
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137
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138 procs = []
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139 has_star = 'all' in authorized_names
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140 for p in processors:
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141 for name in authorized_names:
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142 if name == p.PROCESSOR_NAME:
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143 procs.append(p)
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144 break
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145 if name == ('-%s' % p.PROCESSOR_NAME):
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146 break
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147 else:
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148 if has_star:
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149 procs.append(p)
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150 return procs
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151
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152
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153 def make_re(patterns):
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154 re_patterns = []
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155 for pat in patterns:
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156 if pat[0] == '/' and pat[-1] == '/' and len(pat) > 2:
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157 re_patterns.append(pat[1:-1])
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158 else:
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159 escaped_pat = (
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160 re.escape(pat)
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161 .replace(r'\*', r'[^/\\]*')
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162 .replace(r'\?', r'[^/\\]'))
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163 re_patterns.append(escaped_pat)
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164 return [re.compile(p) for p in re_patterns]
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165
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166
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167 def re_matchany(rel_path, patterns):
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168 # skip patterns use a forward slash regardless of the platform.
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169 rel_path = rel_path.replace('\\', '/')
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170 for pattern in patterns:
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171 if pattern.search(rel_path):
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172 return True
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173 return False
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174
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175
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176 re_ansicolors = re.compile('\033\\[\d+m')
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177
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178
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179 def _get_errors(ex, strip_colors=False):
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180 errors = []
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181 while ex is not None:
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182 msg = str(ex)
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183 if strip_colors:
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184 msg = re_ansicolors.sub('', msg)
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185 errors.append(msg)
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186 ex = ex.__cause__
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187 return errors
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188