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annotate piecrust/pipelines/base.py @ 895:accfe8fc8440

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admin: Add a Micropub endpoint.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 02 Jul 2017 22:23:12 -0700
parents d6d35b2efd04
children 8adc27285d93
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852
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1 import os.path
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2 import logging
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3 from werkzeug.utils import cached_property
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4 from piecrust.configuration import ConfigurationError
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5
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6
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7 logger = logging.getLogger(__name__)
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8
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9
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10 class PipelineContext:
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11 """ The context for running a content pipeline.
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12 """
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13 def __init__(self, out_dir, *,
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14 worker_id=-1, force=None):
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15 self.out_dir = out_dir
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16 self.worker_id = worker_id
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17 self.force = force
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18
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19 @property
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20 def is_worker(self):
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21 """ Returns `True` if the content pipeline is running inside
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22 a worker process, and this is the first one.
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23 """
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24 return self.worker_id >= 0
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25
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26 @property
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27 def is_main_process(self):
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28 """ Returns `True` is the content pipeline is running inside
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29 the main process (and not a worker process). This is the case
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30 if there are no worker processes at all.
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31 """
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32 return self.worker_id < 0
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33
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34
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35 class PipelineJob:
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36 """ Base class for a pipline baking job.
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37 """
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38 def __init__(self, pipeline, content_item):
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39 self.source_name = pipeline.source.name
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40 self.record_name = pipeline.record_name
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41 self.content_item = content_item
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42 self.step_num = 0
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43 self.data = {}
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44
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45
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46 class PipelineJobCreateContext:
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47 """ Context for create pipeline baking jobs.
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48 """
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49 def __init__(self, step_num, record_histories):
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50 self.step_num = step_num
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51 self.record_histories = record_histories
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52
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53
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54 class PipelineJobRunContext:
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55 """ Context for running pipeline baking jobs.
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56 """
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57 def __init__(self, job, record_name, record_histories):
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58 self.job = job
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59 self.record_name = record_name
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60 self.record_histories = record_histories
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61
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62 @property
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63 def content_item(self):
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64 return self.job.content_item
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65
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66 @cached_property
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67 def previous_record(self):
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68 return self.record_histories.getPreviousRecord(self.record_name)
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69
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70 @cached_property
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71 def record_entry_spec(self):
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72 content_item = self.content_item
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73 return content_item.metadata.get('record_entry_spec',
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74 content_item.spec)
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75
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76 @cached_property
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77 def previous_entry(self):
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78 return self.previous_record.getEntry(self.record_entry_spec)
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79
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80
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81 class PipelineJobResult:
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82 """ Result of running a pipeline on a content item.
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83 """
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84 def __init__(self):
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85 self.record_entry = None
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86 self.next_step_job = None
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87
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88
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89 class PipelineMergeRecordContext:
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90 """ The context for merging a record entry for a second or higher pass
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91 into the bake record.
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92 """
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93 def __init__(self, record, job, step_num):
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94 self.record = record
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95 self.job = job
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96 self.step_num = step_num
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97
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98
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99 class PipelinePostJobRunContext:
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100 def __init__(self, record_history):
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101 self.record_history = record_history
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102
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103
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104 class PipelineDeletionContext:
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105 def __init__(self, record_history):
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106 self.record_history = record_history
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107
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108
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109 class PipelineCollapseRecordContext:
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110 def __init__(self, record_history):
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111 self.record_history = record_history
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112
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113
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114 class ContentPipeline:
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115 """ A pipeline that processes content from a `ContentSource`.
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116 """
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117 PIPELINE_NAME = None
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118 RECORD_ENTRY_CLASS = None
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119 PASS_NUM = 0
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120
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121 def __init__(self, source, ctx):
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122 self.source = source
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123 self.ctx = ctx
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diff changeset
124 self.record_name = '%s@%s' % (source.name, self.PIPELINE_NAME)
852
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parents:
diff changeset
125
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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diff changeset
126 app = source.app
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parents:
diff changeset
127 tmp_dir = app.cache_dir
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parents:
diff changeset
128 if not tmp_dir:
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
129 import tempfile
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diff changeset
130 tmp_dir = os.path.join(tempfile.gettempdir(), 'piecrust')
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diff changeset
131 self.tmp_dir = os.path.join(tmp_dir, self.PIPELINE_NAME)
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parents:
diff changeset
132
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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parents:
diff changeset
133 @property
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parents:
diff changeset
134 def app(self):
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parents:
diff changeset
135 return self.source.app
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
136
854
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
137 def initialize(self):
852
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diff changeset
138 pass
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parents:
diff changeset
139
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448710d84121 refactor: Get the taxonomy support back to a functional state.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
140 def createJobs(self, ctx):
854
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
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diff changeset
141 return [
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diff changeset
142 self.createJob(item)
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diff changeset
143 for item in self.source.getAllContents()]
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diff changeset
144
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
145 def createJob(self, content_item):
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diff changeset
146 return PipelineJob(self, content_item)
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parents: 853
diff changeset
147
876
d1095774bfcf refactor: Fix some issues with record/cache entry collisions, add counters.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
148 def createRecordEntry(self, job, ctx):
854
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
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diff changeset
149 entry_class = self.RECORD_ENTRY_CLASS
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diff changeset
150 record_entry = entry_class()
876
d1095774bfcf refactor: Fix some issues with record/cache entry collisions, add counters.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
151 record_entry.item_spec = ctx.record_entry_spec
854
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diff changeset
152 return record_entry
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diff changeset
153
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
154 def mergeRecordEntry(self, record_entry, ctx):
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diff changeset
155 raise NotImplementedError()
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diff changeset
156
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
157 def run(self, job, ctx, result):
852
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diff changeset
158 raise NotImplementedError()
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
159
855
448710d84121 refactor: Get the taxonomy support back to a functional state.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
160 def postJobRun(self, ctx):
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diff changeset
161 pass
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diff changeset
162
853
f070a4fc033c core: Continue PieCrust3 refactor, simplify pages.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
163 def getDeletions(self, ctx):
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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diff changeset
164 pass
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parents:
diff changeset
165
853
f070a4fc033c core: Continue PieCrust3 refactor, simplify pages.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
166 def collapseRecords(self, ctx):
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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diff changeset
167 pass
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parents:
diff changeset
168
854
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
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diff changeset
169 def shutdown(self):
852
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diff changeset
170 pass
854
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diff changeset
171
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
172
855
448710d84121 refactor: Get the taxonomy support back to a functional state.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
173 def get_record_name_for_source(source):
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diff changeset
174 ppname = get_pipeline_name_for_source(source)
448710d84121 refactor: Get the taxonomy support back to a functional state.
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diff changeset
175 return '%s@%s' % (source.name, ppname)
448710d84121 refactor: Get the taxonomy support back to a functional state.
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diff changeset
176
448710d84121 refactor: Get the taxonomy support back to a functional state.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
177
854
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
178 def get_pipeline_name_for_source(source):
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diff changeset
179 pname = source.config['pipeline']
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
180 if not pname:
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
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diff changeset
181 pname = source.DEFAULT_PIPELINE_NAME
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diff changeset
182 if not pname:
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diff changeset
183 raise ConfigurationError(
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
184 "Source '%s' doesn't specify any pipeline." % source.name)
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
185 return pname
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diff changeset
186
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
187
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diff changeset
188 class PipelineManager:
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
189 def __init__(self, app, out_dir, record_histories, *,
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diff changeset
190 worker_id=-1, force=False):
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
191 self.app = app
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
192 self.record_histories = record_histories
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parents: 853
diff changeset
193 self.out_dir = out_dir
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
194 self.worker_id = worker_id
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
195 self.force = force
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
196
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
197 self._pipeline_classes = {}
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Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
198 for pclass in app.plugin_loader.getPipelines():
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
199 self._pipeline_classes[pclass.PIPELINE_NAME] = pclass
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
200
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
201 self._pipelines = {}
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
202
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
203 def getPipeline(self, source_name):
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
204 return self._pipelines[source_name]
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
205
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
206 def getPipelines(self):
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
207 return self._pipelines.values()
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
208
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
209 def createPipeline(self, source):
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
210 if source.name in self._pipelines:
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
211 raise ValueError("Pipeline for source '%s' was already created." %
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
212 source.name)
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
213
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
214 pname = get_pipeline_name_for_source(source)
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
215 ppctx = PipelineContext(self.out_dir,
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
216 worker_id=self.worker_id, force=self.force)
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
217 pp = self._pipeline_classes[pname](source, ppctx)
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
218 pp.initialize()
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
219
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
220 record_history = self.record_histories.getHistory(pp.record_name)
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
221
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
222 info = _PipelineInfo(pp, record_history)
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
223 self._pipelines[source.name] = info
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
224 return info
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
225
855
448710d84121 refactor: Get the taxonomy support back to a functional state.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
226 def postJobRun(self):
854
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
227 for ppinfo in self.getPipelines():
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
228 ppinfo.record_history.build()
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
229
855
448710d84121 refactor: Get the taxonomy support back to a functional state.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
230 for ppinfo in self.getPipelines():
448710d84121 refactor: Get the taxonomy support back to a functional state.
Ludovic Chabant <ludovic@chabant.com>
parents: 854
diff changeset
231 ctx = PipelinePostJobRunContext(ppinfo.record_history)
448710d84121 refactor: Get the taxonomy support back to a functional state.
Ludovic Chabant <ludovic@chabant.com>
parents: 854
diff changeset
232 ppinfo.pipeline.postJobRun(ctx)
448710d84121 refactor: Get the taxonomy support back to a functional state.
Ludovic Chabant <ludovic@chabant.com>
parents: 854
diff changeset
233
854
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
234 def deleteStaleOutputs(self):
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
235 for ppinfo in self.getPipelines():
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
236 ctx = PipelineDeletionContext(ppinfo.record_history)
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
237 to_delete = ppinfo.pipeline.getDeletions(ctx)
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
238 current_record = ppinfo.record_history.current
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
239 if to_delete is not None:
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
240 for path, reason in to_delete:
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
241 logger.debug("Removing '%s': %s" % (path, reason))
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
242 current_record.deleted_out_paths.append(path)
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
243 try:
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
244 os.remove(path)
08e02c2a2a1a core: Keep refactoring, this time to prepare for generator sources.
Ludovic Chabant <ludovic@chabant.com>
parents: 853
diff changeset
245 except FileNotFoundError:
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246 pass
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247 logger.info('[delete] %s' % path)
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248
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249 def collapseRecords(self):
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250 for ppinfo in self.getPipelines():
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251 ctx = PipelineCollapseRecordContext(ppinfo.record_history)
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252 ppinfo.pipeline.collapseRecords(ctx)
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253
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254 def shutdownPipelines(self):
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255 for ppinfo in self.getPipelines():
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256 ppinfo.pipeline.shutdown()
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257
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258 self._pipelines = {}
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259
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260
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261 class _PipelineInfo:
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262 def __init__(self, pipeline, record_history):
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263 self.pipeline = pipeline
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264 self.record_history = record_history
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265 self.userdata = None
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266
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267 @property
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268 def source(self):
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269 return self.pipeline.source
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270
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271 @property
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272 def pipeline_name(self):
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273 return self.pipeline.PIPELINE_NAME
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274