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annotate piecrust/baking/worker.py @ 656:dba53f0f7671

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admin: run an asset processing loop in the background.
author Ludovic Chabant <ludovic@chabant.com>
date Mon, 22 Feb 2016 22:44:39 -0800
parents 27e3b3f05648
children 3ceeca7bb71c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import time
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2 import logging
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3 from piecrust.app import PieCrust, apply_variant_and_values
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4 from piecrust.baking.records import BakeRecord, _get_transition_key
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5 from piecrust.baking.single import PageBaker, BakingError
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6 from piecrust.environment import AbortedSourceUseError
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7 from piecrust.rendering import (
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8 QualifiedPage, PageRenderingContext, render_page_segments)
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9 from piecrust.routing import create_route_metadata
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10 from piecrust.sources.base import PageFactory
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11 from piecrust.workerpool import IWorker
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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 class BakeWorkerContext(object):
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18 def __init__(self, root_dir, sub_cache_dir, out_dir,
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19 previous_record_path=None,
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20 config_variant=None, config_values=None,
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21 force=False, debug=False):
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22 self.root_dir = root_dir
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23 self.sub_cache_dir = sub_cache_dir
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24 self.out_dir = out_dir
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25 self.previous_record_path = previous_record_path
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26 self.config_variant = config_variant
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27 self.config_values = config_values
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28 self.force = force
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29 self.debug = debug
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30 self.app = None
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31 self.previous_record = None
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32 self.previous_record_index = None
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33
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34
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35 class BakeWorker(IWorker):
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36 def __init__(self, ctx):
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37 self.ctx = ctx
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38 self.work_start_time = time.perf_counter()
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39
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40 def initialize(self):
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41 # Create the app local to this worker.
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42 app = PieCrust(self.ctx.root_dir, debug=self.ctx.debug)
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43 app._useSubCacheDir(self.ctx.sub_cache_dir)
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44 app.config.set('baker/is_baking', True)
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45 app.config.set('baker/worker_id', self.wid)
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46 app.env.base_asset_url_format = '%uri%'
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47 app.env.fs_cache_only_for_main_page = True
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48 app.env.registerTimer("BakeWorker_%d_Total" % self.wid)
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49 app.env.registerTimer("BakeWorkerInit")
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50 app.env.registerTimer("JobReceive")
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51 apply_variant_and_values(app, self.ctx.config_variant,
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52 self.ctx.config_values)
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53 self.ctx.app = app
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54
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55 # Load previous record
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56 if self.ctx.previous_record_path:
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57 self.ctx.previous_record = BakeRecord.load(
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58 self.ctx.previous_record_path)
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59 self.ctx.previous_record_index = {}
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60 for e in self.ctx.previous_record.entries:
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61 key = _get_transition_key(e.path, e.taxonomy_info)
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62 self.ctx.previous_record_index[key] = e
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63
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64 # Create the job handlers.
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65 job_handlers = {
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66 JOB_LOAD: LoadJobHandler(self.ctx),
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67 JOB_RENDER_FIRST: RenderFirstSubJobHandler(self.ctx),
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68 JOB_BAKE: BakeJobHandler(self.ctx)}
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69 for jt, jh in job_handlers.items():
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70 app.env.registerTimer(type(jh).__name__)
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71 self.job_handlers = job_handlers
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72
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73 app.env.stepTimerSince("BakeWorkerInit", self.work_start_time)
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74
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75 def process(self, job):
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76 handler = self.job_handlers[job['type']]
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77 with self.ctx.app.env.timerScope(type(handler).__name__):
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78 return handler.handleJob(job['job'])
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79
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80 def getReport(self):
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81 self.ctx.app.env.stepTimerSince("BakeWorker_%d_Total" % self.wid,
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82 self.work_start_time)
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83 return {
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84 'type': 'timers',
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85 'data': self.ctx.app.env._timers}
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86
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87
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88 JOB_LOAD, JOB_RENDER_FIRST, JOB_BAKE = range(0, 3)
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89
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90
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91 class JobHandler(object):
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92 def __init__(self, ctx):
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93 self.ctx = ctx
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94
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95 @property
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96 def app(self):
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97 return self.ctx.app
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98
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99 def handleJob(self, job):
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100 raise NotImplementedError()
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101
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102
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103 def _get_errors(ex):
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104 errors = []
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105 while ex is not None:
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106 errors.append(str(ex))
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107 ex = ex.__cause__
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108 return errors
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109
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110
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111 def save_factory(fac):
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112 return {
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113 'source_name': fac.source.name,
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114 'rel_path': fac.rel_path,
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115 'metadata': fac.metadata}
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116
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117
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118 def load_factory(app, info):
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119 source = app.getSource(info['source_name'])
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120 return PageFactory(source, info['rel_path'], info['metadata'])
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121
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122
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123 class LoadJobHandler(JobHandler):
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124 def handleJob(self, job):
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125 # Just make sure the page has been cached.
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126 fac = load_factory(self.app, job)
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127 logger.debug("Loading page: %s" % fac.ref_spec)
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128 result = {
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129 'source_name': fac.source.name,
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130 'path': fac.path,
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131 'config': None,
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132 'errors': None}
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133 try:
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134 page = fac.buildPage()
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135 page._load()
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136 result['config'] = page.config.getAll()
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137 except Exception as ex:
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138 logger.debug("Got loading error. Sending it to master.")
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139 result['errors'] = _get_errors(ex)
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140 if self.ctx.debug:
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141 logger.exception(ex)
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142 return result
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143
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144
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145 class RenderFirstSubJobHandler(JobHandler):
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146 def handleJob(self, job):
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147 # Render the segments for the first sub-page of this page.
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148 fac = load_factory(self.app, job)
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149
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150 # These things should be OK as they're checked upstream by the baker.
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151 route = self.app.getRoute(fac.source.name, fac.metadata,
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152 skip_taxonomies=True)
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153 assert route is not None
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154
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155 page = fac.buildPage()
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156 route_metadata = create_route_metadata(page)
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157 qp = QualifiedPage(page, route, route_metadata)
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158 ctx = PageRenderingContext(qp)
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159 self.app.env.abort_source_use = True
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160
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161 result = {
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162 'path': fac.path,
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163 'aborted': False,
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164 'errors': None}
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165 logger.debug("Preparing page: %s" % fac.ref_spec)
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166 try:
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167 render_page_segments(ctx)
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168 except AbortedSourceUseError:
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169 logger.debug("Page %s was aborted." % fac.ref_spec)
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170 result['aborted'] = True
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171 except Exception as ex:
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172 logger.debug("Got rendering error. Sending it to master.")
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173 result['errors'] = _get_errors(ex)
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174 if self.ctx.debug:
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175 logger.exception(ex)
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176 finally:
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177 self.app.env.abort_source_use = False
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178 return result
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179
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180
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181 class BakeJobHandler(JobHandler):
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182 def __init__(self, ctx):
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183 super(BakeJobHandler, self).__init__(ctx)
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184 self.page_baker = PageBaker(ctx.app, ctx.out_dir, ctx.force)
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185
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186 def handleJob(self, job):
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187 # Actually bake the page and all its sub-pages to the output folder.
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188 fac = load_factory(self.app, job['factory_info'])
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189
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190 route_metadata = job['route_metadata']
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191 tax_info = job['taxonomy_info']
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192 if tax_info is not None:
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193 route = self.app.getTaxonomyRoute(tax_info.taxonomy_name,
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194 tax_info.source_name)
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195 else:
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196 route = self.app.getRoute(fac.source.name, route_metadata,
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197 skip_taxonomies=True)
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198 assert route is not None
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199
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200 page = fac.buildPage()
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201 qp = QualifiedPage(page, route, route_metadata)
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202
451
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203 result = {
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204 'path': fac.path,
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205 'taxonomy_info': tax_info,
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206 'sub_entries': None,
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207 'errors': None}
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208 dirty_source_names = job['dirty_source_names']
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209
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210 previous_entry = None
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211 if self.ctx.previous_record_index is not None:
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212 key = _get_transition_key(fac.path, tax_info)
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213 previous_entry = self.ctx.previous_record_index.get(key)
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diff changeset
214
411
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215 logger.debug("Baking page: %s" % fac.ref_spec)
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216 try:
415
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diff changeset
217 sub_entries = self.page_baker.bake(
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218 qp, previous_entry, dirty_source_names, tax_info)
451
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diff changeset
219 result['sub_entries'] = sub_entries
411
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220
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diff changeset
221 except BakingError as ex:
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222 logger.debug("Got baking error. Sending it to master.")
451
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diff changeset
223 result['errors'] = _get_errors(ex)
415
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diff changeset
224 if self.ctx.debug:
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diff changeset
225 logger.exception(ex)
411
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226
447
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diff changeset
227 return result
411
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parents:
diff changeset
228