Mercurial > piecrust2
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> |
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date | Wed, 17 May 2017 00:11:48 -0700 |
parents | |
children | f070a4fc033c |
rev | line source |
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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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181 |