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annotate piecrust/sources/base.py @ 411:e7b865f8f335

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bake: Enable multiprocess baking. Baking is now done by running a worker per CPU, and sending jobs to them. This changes several things across the codebase: * Ability to not cache things related to pages other than the 'main' page (i.e. the page at the bottom of the execution stack). * Decouple the baking process from the bake records, so only the main process keeps track (and modifies) the bake record. * Remove the need for 'batch page getters' and loading a page directly from the page factories. There are various smaller changes too included here, including support for scope performance timers that are saved with the bake record and can be printed out to the console. Yes I got carried away. For testing, the in-memory 'mock' file-system doesn't work anymore, since we're spawning processes, so this is replaced by a 'tmpfs' file-system which is saved in temporary files on disk and deleted after tests have run.
author Ludovic Chabant <ludovic@chabant.com>
date Fri, 12 Jun 2015 17:09:19 -0700
parents 4b1019bb2533
children 32c7c2d219d2
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import copy
3
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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 from piecrust.page import Page
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6
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7
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8 REALM_USER = 0
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9 REALM_THEME = 1
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10 REALM_NAMES = {
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11 REALM_USER: 'User',
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12 REALM_THEME: 'Theme'}
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13
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14
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15 MODE_PARSING = 0
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16 MODE_CREATING = 1
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17
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18
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19 logger = logging.getLogger(__name__)
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20
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21
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22 def build_pages(app, factories):
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23 for f in factories:
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24 yield f.buildPage()
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26
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27 class InvalidFileSystemEndpointError(Exception):
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28 def __init__(self, source_name, fs_endpoint):
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29 super(InvalidFileSystemEndpointError, self).__init__(
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30 "Invalid file-system endpoint for source '%s': %s" %
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31 (source_name, fs_endpoint))
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33
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34 class PageFactory(object):
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35 """ A class responsible for creating a page.
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36 """
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37 def __init__(self, source, rel_path, metadata):
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38 self.source = source
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39 self.rel_path = rel_path
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40 self.metadata = metadata
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41
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42 @cached_property
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43 def ref_spec(self):
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44 return '%s:%s' % (self.source.name, self.rel_path)
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45
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46 @cached_property
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47 def path(self):
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48 path, _ = self.source.resolveRef(self.rel_path)
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49 return path
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50
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51 def buildPage(self):
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52 repo = self.source.app.env.page_repository
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53 if repo is not None:
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54 cache_key = '%s:%s' % (self.source.name, self.rel_path)
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55 return repo.get(cache_key, self._doBuildPage)
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56 return self._doBuildPage()
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57
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58 def _doBuildPage(self):
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59 logger.debug("Building page: %s" % self.path)
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60 page = Page(self.source, copy.deepcopy(self.metadata), self.rel_path)
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61 return page
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62
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63
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64 class PageSource(object):
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65 """ A source for pages, e.g. a directory with one file per page.
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66 """
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67 def __init__(self, app, name, config):
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68 self.app = app
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69 self.name = name
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70 self.config = config or {}
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71 self.config.setdefault('realm', REALM_USER)
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72 self._factories = None
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73 self._provider_type = None
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74
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75 def __getattr__(self, name):
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76 try:
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77 return self.config[name]
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78 except KeyError:
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79 raise AttributeError()
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80
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81 @property
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82 def is_theme_source(self):
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83 return self.realm == REALM_THEME
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84
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85 @property
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86 def root_dir(self):
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87 if self.is_theme_source:
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88 return self.app.theme_dir
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89 return self.app.root_dir
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90
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91 def getPages(self):
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92 return build_pages(self.app, self.getPageFactories())
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93
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94 def getPage(self, metadata):
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95 factory = self.findPageFactory(metadata, MODE_PARSING)
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96 if factory is None:
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97 return None
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98 return factory.buildPage()
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99
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100 def getPageFactories(self):
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101 if self._factories is None:
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102 self._factories = list(self.buildPageFactories())
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103 return self._factories
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104
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105 def buildPageFactories(self):
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106 raise NotImplementedError()
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107
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108 def resolveRef(self, ref_path):
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109 """ Returns the full path and source metadata given a source
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110 (relative) path, like a ref-spec.
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111 """
3
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112 raise NotImplementedError()
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113
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114 def findPageFactory(self, metadata, mode):
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115 raise NotImplementedError()
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116
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117 def buildDataProvider(self, page, user_data):
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118 if self._provider_type is None:
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119 cls = next((pt for pt in self.app.plugin_loader.getDataProviders()
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120 if pt.PROVIDER_NAME == self.data_type),
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121 None)
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122 if cls is None:
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123 raise ConfigurationError(
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124 "Unknown data provider type: %s" % self.data_type)
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125 self._provider_type = cls
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126
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127 return self._provider_type(self, page, user_data)
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128
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129 def getTaxonomyPageRef(self, tax_name):
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130 tax_pages = self.config.get('taxonomy_pages')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
131 if tax_pages is None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
132 return None
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
133 return tax_pages.get(tax_name)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
134