annotate piecrust/pipelines/records.py @ 852:4850f8c21b6e

core: Start of the big refactor for PieCrust 3.0. * Everything is a `ContentSource`, including assets directories. * Most content sources are subclasses of the base file-system source. * A source is processed by a "pipeline", and there are 2 built-in pipelines, one for assets and one for pages. The asset pipeline is vaguely functional, but the page pipeline is completely broken right now. * Rewrite the baking process as just running appropriate pipelines on each content item. This should allow for better parallelization.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 17 May 2017 00:11:48 -0700
parents
children f070a4fc033c
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rev   line source
852
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1 import os
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2 import os.path
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3 import pickle
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4 import hashlib
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5 import logging
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6 from piecrust import APP_VERSION
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7
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8
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9 logger = logging.getLogger(__name__)
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10
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11
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12 class MultiRecord:
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13 RECORD_VERSION = 12
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14
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15 def __init__(self):
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16 self.records = []
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17 self.success = True
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18 self.bake_time = 0
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19 self.incremental_count = 0
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20 self.invalidated = False
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21 self.stats = None
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22 self._app_version = APP_VERSION
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23 self._record_version = self.RECORD_VERSION
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24
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25 def getRecord(self, record_name, auto_create=True):
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26 for r in self.records:
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27 if r.name == record_name:
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28 return r
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29 if not auto_create:
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30 return None
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31 record = Record()
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32 self.records.append(record)
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33 return record
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34
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35 def save(self, path):
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36 path_dir = os.path.dirname(path)
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37 if not os.path.isdir(path_dir):
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38 os.makedirs(path_dir, 0o755)
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39
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40 with open(path, 'wb') as fp:
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41 pickle.dump(self, fp, pickle.HIGHEST_PROTOCOL)
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42
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43 @staticmethod
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44 def load(path):
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45 logger.debug("Loading bake records from: %s" % path)
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46 with open(path, 'rb') as fp:
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47 return pickle.load(fp)
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48
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49
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50 class Record:
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51 def __init__(self):
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52 self.name = None
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53 self.entries = []
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54 self.stats = {}
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55 self.out_dir = None
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56 self.success = True
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57
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58
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59 class RecordEntry:
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60 def __init__(self):
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61 self.item_spec = None
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62 self.errors = []
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63
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64 @property
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65 def success(self):
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66 return len(self.errors) == 0
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67
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68
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69 def _are_records_valid(multi_record):
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70 return (multi_record._app_version == APP_VERSION and
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71 multi_record._record_version == MultiRecord.RECORD_VERSION)
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72
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73
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74 def load_records(path):
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75 try:
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76 multi_record = MultiRecord.load(path)
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77 except Exception as ex:
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78 logger.debug("Error loading records from: %s" % path)
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79 logger.debug(ex)
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80 logger.debug("Will use empty records.")
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81 multi_record = None
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82
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83 was_invalid = False
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84 if multi_record is not None and not _are_records_valid(multi_record):
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85 logger.debug(
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86 "Records from '%s' have old version: %s/%s." %
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87 (path, multi_record._app_version, multi_record._record_version))
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88 logger.debug("Will use empty records.")
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89 multi_record = None
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90 was_invalid = True
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91
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92 if multi_record is None:
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93 multi_record = MultiRecord()
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94 multi_record.invalidated = was_invalid
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95
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96 return multi_record
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97
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98
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99 def _build_diff_key(item_spec):
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100 return hashlib.md5(item_spec.encode('utf8')).hexdigest()
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101
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102
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103 class MultiRecordHistory:
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104 def __init__(self, previous, current):
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105 if previous is None or current is None:
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106 raise ValueError()
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107
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108 self.previous = previous
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109 self.current = current
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110 self.histories = []
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111 self._buildHistories(previous, current)
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112
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113 def getHistory(self, record_name):
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114 for h in self.histories:
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115 if h.name == record_name:
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116 return h
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117 return None
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118
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119 def _buildHistories(self, previous, current):
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120 pairs = {}
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121 if previous:
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122 for r in previous.records:
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123 pairs[r.name] = (r, None)
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124 if current:
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125 for r in current.records:
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126 p = pairs.get(r.name, (None, None))
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127 if p[1] is not None:
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128 raise Exception("Got several records named: %s" % r.name)
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129 pairs[r.name] = (p[0], r)
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130
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131 for p, c in pairs.values():
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132 self.histories.append(RecordHistory(p, c))
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133
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134
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135 class RecordHistory:
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136 def __init__(self, previous, current):
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137 self._diffs = {}
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138 self._previous = previous
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139 self._current = current
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140
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141 if previous and current and previous.name != current.name:
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142 raise Exception("The two records must have the same name! "
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143 "Got '%s' and '%s'." %
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144 (previous.name, current.name))
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145
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146 self._buildDiffs()
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147
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148 @property
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149 def name(self):
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150 return self._current.name
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151
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152 @property
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153 def current(self):
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154 return self._current
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155
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156 @property
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157 def previous(self):
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158 return self._previous
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159
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160 @property
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161 def diffs(self):
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162 return self._diffs.values()
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163
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164 def _buildDiffs(self):
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165 if self._previous is not None:
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166 for e in self._previous.entries:
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167 key = _build_diff_key(e.item_spec)
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168 self._diffs[key] = (e, None)
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169
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170 if self._current is not None:
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171 for e in self._current.entries:
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172 key = _build_diff_key(e.item_spec)
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173 diff = self._diffs.get(key)
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174 if diff is None:
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175 self._diffs[key] = (None, e)
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176 elif diff[1] is None:
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177 self._diffs[key] = (diff[0], e)
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178 else:
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179 raise Exception(
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180 "A current record entry already exists for: %s" % key)
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parents:
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181