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annotate piecrust/processing/base.py @ 111:208c652551a3

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Quick fix for making the server correctly update referenced pages. Disable the file-system cache for rendered segments when in server mode. We can bring this optimization back when we're actually using the baking record in the server too in order to know dependencies.
author Ludovic Chabant <ludovic@chabant.com>
date Thu, 16 Oct 2014 17:03:42 -0700
parents 45828c4167ad
children 6827dcc9d3fb
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3
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1 import re
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2 import time
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3 import shutil
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4 import os.path
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5 import logging
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6 import threading
5
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7 from queue import Queue, Empty
3
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8 from piecrust.chefutil import format_timed
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9 from piecrust.processing.tree import (ProcessingTreeBuilder,
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10 ProcessingTreeRunner, STATE_DIRTY, print_node)
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11 from piecrust.records import Record
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12
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13
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14 logger = logging.getLogger(__name__)
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15
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16
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17 PRIORITY_FIRST = -1
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18 PRIORITY_NORMAL = 0
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19 PRIORITY_LAST = 1
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20
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21
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22 class Processor(object):
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23 PROCESSOR_NAME = None
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24
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25 def __init__(self):
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26 self.priority = PRIORITY_NORMAL
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27 self.is_bypassing_structured_processing = False
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28 self.is_delegating_dependency_check = True
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29
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30 def initialize(self, app):
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31 self.app = app
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32
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33 def onPipelineStart(self, pipeline):
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34 pass
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35
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36 def onPipelineEnd(self, pipeline):
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37 pass
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38
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39 def matches(self, filename):
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40 return False
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41
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42 def getDependencies(self, path):
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43 return None
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44
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45 def getOutputFilenames(self, filename):
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46 return None
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47
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48 def process(self, path, out_dir):
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49 pass
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50
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51
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52 class CopyFileProcessor(Processor):
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53 PROCESSOR_NAME = 'copy'
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54
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55 def __init__(self):
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56 super(CopyFileProcessor, self).__init__()
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57 self.priority = PRIORITY_LAST
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58
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59 def matches(self, filename):
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60 return True
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61
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62 def getOutputFilenames(self, filename):
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63 return [filename]
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64
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65 def process(self, path, out_dir):
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66 out_path = os.path.join(out_dir, os.path.basename(path))
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67 logger.debug("Copying: %s -> %s" % (path, out_path))
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68 shutil.copyfile(path, out_path)
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69 return True
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71
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72 class SimpleFileProcessor(Processor):
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73 def __init__(self, extensions=None):
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74 super(SimpleFileProcessor, self).__init__()
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75 self.extensions = extensions or {}
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76
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77 def matches(self, filename):
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78 for ext in self.extensions:
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79 if filename.endswith('.' + ext):
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80 return True
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81 return False
3
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82
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83 def getOutputFilenames(self, filename):
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84 basename, ext = os.path.splitext(filename)
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85 ext = ext.lstrip('.')
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86 out_ext = self.extensions[ext]
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87 return ['%s.%s' % (basename, out_ext)]
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88
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89 def process(self, path, out_dir):
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90 _, in_name = os.path.split(path)
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91 out_name = self.getOutputFilenames(in_name)[0]
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92 out_path = os.path.join(out_dir, out_name)
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93 return self._doProcess(path, out_path)
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94
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95 def _doProcess(self, in_path, out_path):
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96 raise NotImplementedError()
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97
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98
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99 class ProcessorPipelineRecord(Record):
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100 VERSION = 1
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101
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102 def __init__(self):
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103 super(ProcessorPipelineRecord, self).__init__()
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104
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105 def addEntry(self, item):
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106 self.entries.append(item)
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107
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108 def hasOverrideEntry(self, rel_path):
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109 return self.findEntry(rel_path) is not None
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110
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111 def findEntry(self, rel_path):
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112 rel_path = rel_path.lower()
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113 for entry in self.entries:
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114 for out_path in entry.rel_outputs:
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115 if out_path.lower() == rel_path:
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116 return entry
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117 return None
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118
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119
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120 class ProcessorPipelineRecordEntry(object):
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121 def __init__(self, base_dir, rel_input, is_processed=False,
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122 is_overridden=False):
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123 self.base_dir = base_dir
3
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124 self.rel_input = rel_input
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125 self.rel_outputs = []
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126 self.is_processed = is_processed
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127 self.is_overridden = is_overridden
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128
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129 @property
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130 def path(self):
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131 return os.path.join(self.base_dir, self.rel_input)
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132
3
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133
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134 class ProcessingContext(object):
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135 def __init__(self, base_dir, job_queue, record=None):
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136 self.base_dir = base_dir
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137 self.job_queue = job_queue
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138 self.record = record
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139
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140
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141 class ProcessorPipeline(object):
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142 def __init__(self, app, mounts, out_dir, force=False,
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143 skip_patterns=None, force_patterns=None, num_workers=4):
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144 self.app = app
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145 self.mounts = mounts
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146 tmp_dir = app.cache_dir
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147 if not tmp_dir:
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148 import tempfile
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149 tmp_dir = os.path.join(tempfile.gettempdir(), 'piecrust')
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150 self.tmp_dir = os.path.join(tmp_dir, 'proc')
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151 self.out_dir = out_dir
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152 self.force = force
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153 self.skip_patterns = skip_patterns or []
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154 self.force_patterns = force_patterns or []
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155 self.processors = app.plugin_loader.getProcessors()
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156 self.num_workers = num_workers
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157
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158 self.skip_patterns += ['_cache', '_counter',
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159 'theme_info.yml',
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160 '.DS_Store', 'Thumbs.db',
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161 '.git*', '.hg*', '.svn']
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162
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163 self.skip_patterns = make_re(self.skip_patterns)
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164 self.force_patterns = make_re(self.force_patterns)
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165
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166 def filterProcessors(self, authorized_names):
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167 self.processors = list(filter(
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168 lambda p: p.PROCESSOR_NAME in authorized_names,
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169 self.processors))
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170
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171 def run(self, src_dir_or_file=None):
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172 record = ProcessorPipelineRecord()
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173
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174 # Create the workers.
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175 pool = []
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176 queue = Queue()
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177 abort = threading.Event()
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178 pipeline_lock = threading.Lock()
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179 for i in range(self.num_workers):
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180 ctx = ProcessingWorkerContext(self, record, queue, abort,
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181 pipeline_lock)
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182 worker = ProcessingWorker(i, ctx)
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183 worker.start()
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184 pool.append(worker)
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185
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186 # Invoke pre-processors.
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187 for proc in self.processors:
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188 proc.onPipelineStart(self)
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189
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190 if src_dir_or_file is not None:
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191 # Process only the given path.
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192 # Find out what mount point this is in.
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193 for path in self.mounts:
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194 if src_dir_or_file[:len(path)] == path:
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195 base_dir = path
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196 break
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197 else:
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198 raise Exception("Input path '%s' is not part of any known "
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199 "mount point: %s" %
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200 (src_dir_or_file, self.mounts))
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201
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202 ctx = ProcessingContext(base_dir, queue, record)
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203 logger.debug("Initiating processing pipeline on: %s" % src_dir_or_file)
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204 if os.path.isdir(src_dir_or_file):
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205 self.processDirectory(ctx, src_dir_or_file)
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206 elif os.path.isfile(src_dir_or_file):
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207 self.processFile(ctx, src_dir_or_file)
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208
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209 else:
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210 # Process everything.
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211 for path in self.mounts:
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212 ctx = ProcessingContext(path, queue, record)
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213 logger.debug("Initiating processing pipeline on: %s" % path)
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214 self.processDirectory(ctx, path)
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215
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216 # Wait on all workers.
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217 for w in pool:
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218 w.join()
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219 if abort.is_set():
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220 raise Exception("Worker pool was aborted.")
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221
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222 # Invoke post-processors.
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223 for proc in self.processors:
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224 proc.onPipelineEnd(self)
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225
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226 return record
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227
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228 def processDirectory(self, ctx, start_dir):
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229 for dirpath, dirnames, filenames in os.walk(start_dir):
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230 rel_dirpath = os.path.relpath(dirpath, start_dir)
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231 dirnames[:] = [d for d in dirnames
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diff changeset
232 if not re_matchany(d, self.skip_patterns, rel_dirpath)]
3
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233
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234 for filename in filenames:
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diff changeset
235 if re_matchany(filename, self.skip_patterns, rel_dirpath):
3
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236 continue
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237 self.processFile(ctx, os.path.join(dirpath, filename))
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238
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239 def processFile(self, ctx, path):
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240 logger.debug("Queuing: %s" % path)
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241 job = ProcessingWorkerJob(ctx.base_dir, path)
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242 ctx.job_queue.put_nowait(job)
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243
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244
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245 class ProcessingWorkerContext(object):
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246 def __init__(self, pipeline, record, work_queue, abort_event,
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diff changeset
247 pipeline_lock):
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248 self.pipeline = pipeline
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249 self.record = record
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250 self.work_queue = work_queue
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251 self.abort_event = abort_event
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252 self.pipeline_lock = pipeline_lock
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253
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254
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255 class ProcessingWorkerJob(object):
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256 def __init__(self, base_dir, path):
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257 self.base_dir = base_dir
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258 self.path = path
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259
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260
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261 class ProcessingWorker(threading.Thread):
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262 def __init__(self, wid, ctx):
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263 super(ProcessingWorker, self).__init__()
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264 self.wid = wid
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265 self.ctx = ctx
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266
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267 def run(self):
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268 while(not self.ctx.abort_event.is_set()):
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269 try:
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270 job = self.ctx.work_queue.get(True, 0.1)
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271 except Empty:
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272 logger.debug("[%d] No more work... shutting down." % self.wid)
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273 break
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274
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275 try:
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276 self._unsafeRun(job)
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277 logger.debug("[%d] Done with file." % self.wid)
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278 self.ctx.work_queue.task_done()
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279 except Exception as ex:
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280 self.ctx.abort_event.set()
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281 logger.error("[%d] Critical error, aborting." % self.wid)
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282 logger.exception(ex)
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283 break
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284
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285 def _unsafeRun(self, job):
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286 start_time = time.clock()
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287 pipeline = self.ctx.pipeline
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288 record = self.ctx.record
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289
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290 rel_path = os.path.relpath(job.path, job.base_dir)
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291
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292 # Figure out if a previously processed file is overriding this one.
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293 # This can happen if a theme file (processed via a mount point)
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294 # is overridden in the user's website.
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295 if record.hasOverrideEntry(rel_path):
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296 record.addEntry(ProcessorPipelineRecordEntry(
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297 job.base_dir, rel_path,
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298 is_processed=False, is_overridden=True))
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299 logger.info(format_timed(start_time,
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300 '%s [not baked, overridden]' % rel_path))
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301 return
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302
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303 builder = ProcessingTreeBuilder(pipeline.processors)
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304 tree_root = builder.build(rel_path)
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305 print_node(tree_root, recursive=True)
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306 leaves = tree_root.getLeaves()
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307 fi = ProcessorPipelineRecordEntry(job.base_dir, rel_path)
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308 fi.rel_outputs = [l.path for l in leaves]
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309 record.addEntry(fi)
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310
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311 force = pipeline.force
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312 if not force:
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313 force = re_matchany(rel_path, pipeline.force_patterns)
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314
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315 if force:
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316 tree_root.setState(STATE_DIRTY, True)
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317
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318 runner = ProcessingTreeRunner(job.base_dir, pipeline.tmp_dir,
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319 pipeline.out_dir, self.ctx.pipeline_lock)
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320 if runner.processSubTree(tree_root):
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321 fi.is_processed = True
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322 logger.info(format_timed(start_time, "[%d] %s" % (self.wid, rel_path)))
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323
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324
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325 def make_re(patterns):
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326 re_patterns = []
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327 for pat in patterns:
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328 if pat[0] == '/' and pat[-1] == '/' and len(pat) > 2:
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329 re_patterns.append(pat[1:-1])
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330 else:
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331 escaped_pat = (re.escape(pat)
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332 .replace(r'\*', r'[^/\\]*')
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333 .replace(r'\?', r'[^/\\]'))
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334 re_patterns.append(escaped_pat)
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335 return [re.compile(p) for p in re_patterns]
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336
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337
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338 def re_matchany(filename, patterns, dirname=None):
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339 if dirname and dirname != '.':
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340 filename = os.path.join(dirname, filename)
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341
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342 # skip patterns use a forward slash regardless of the platform.
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343 filename = filename.replace('\\', '/')
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344 for pattern in patterns:
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345 if pattern.search(filename):
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346 return True
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347 return False
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348