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annotate piecrust/sources/base.py @ 853:f070a4fc033c

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core: Continue PieCrust3 refactor, simplify pages. The asset pipeline is still the only function pipeline at this point. * No more `QualifiedPage`, and several other pieces of code deleted. * Data providers are simpler and more focused. For instance, the page iterator doesn't try to support other types of items. * Route parameters are proper known source metadata to remove the confusion between the two. * Make the baker and pipeline more correctly manage records and record histories. * Add support for record collapsing and deleting stale outputs in the asset pipeline.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 21 May 2017 00:06:59 -0700
parents 4850f8c21b6e
children 08e02c2a2a1a
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1 import logging
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2 import collections
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3 from werkzeug.utils import cached_property
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5
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6 # Source realms, to differentiate sources in the site itself ('User')
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7 # and sources in the site's theme ('Theme').
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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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14
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15 # Types of relationships a content source can be asked for.
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16 REL_ASSETS = 1
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19 logger = logging.getLogger(__name__)
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21
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22 class SourceNotFoundError(Exception):
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23 pass
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25
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26 class InsufficientRouteParameters(Exception):
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27 pass
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30 class AbortedSourceUseError(Exception):
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31 pass
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34 class GeneratedContentException(Exception):
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35 pass
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38 CONTENT_TYPE_PAGE = 0
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39 CONTENT_TYPE_ASSET = 1
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41
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42 class ContentItem:
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43 """ Describes a piece of content.
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44
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45 Some known metadata that PieCrust will use include:
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46 - `route_params`: A dictionary of route parameters to generate
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47 the URL to the content.
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48 - `config`: A dictionary of configuration settings to merge
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49 into the settings found in the content itself.
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50 """
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51 def __init__(self, spec, metadata):
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52 self.spec = spec
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53 self.metadata = metadata
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54
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55 @property
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56 def is_group(self):
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57 return False
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60 class ContentGroup:
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61 """ Describes a group of `ContentItem`s.
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62 """
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63 def __init__(self, spec, metadata):
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64 self.spec = spec
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65 self.metadata = metadata
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66
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67 @property
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68 def is_group(self):
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69 return True
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72 class ContentSource:
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73 """ A source for content.
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74 """
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75 def __init__(self, app, name, config):
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76 self.app = app
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77 self.name = name
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78 self.config = config or {}
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80 @property
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81 def is_theme_source(self):
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82 return self.config['realm'] == REALM_THEME
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84 @property
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85 def root_dir(self):
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86 if self.is_theme_source:
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87 return self.app.theme_dir
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88 return self.app.root_dir
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89
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90 @cached_property
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91 def route(self):
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92 return self.app.getSourceRoute(self.name)
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93
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94 def openItem(self, item, mode='r', **kwargs):
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95 raise NotImplementedError()
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96
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97 def getItemMtime(self, item):
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98 raise NotImplementedError()
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371a6c879ab9 When possible, try and batch-load pages so we only lock once.
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99
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100 def getAllContents(self):
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101 stack = collections.deque()
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102 stack.append(None)
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103 while len(stack) > 0:
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104 cur = stack.popleft()
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105 try:
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106 contents = self.getContents(cur)
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107 except GeneratedContentException:
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108 continue
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109 if contents is not None:
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110 for c in contents:
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111 if c.is_group:
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112 stack.append(c)
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113 else:
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114 yield c
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115
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116 def getContents(self, group):
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117 raise NotImplementedError("'%s' doesn't implement 'getContents'." %
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118 self.__class__)
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119
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120 def getRelatedContents(self, item, relationship):
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121 raise NotImplementedError()
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122
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123 def findContent(self, route_params):
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124 raise NotImplementedError()
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125
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126 def getSupportedRouteParameters(self):
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Ludovic Chabant <ludovic@chabant.com>
parents: 711
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127 raise NotImplementedError()
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parents: 711
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128
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Ludovic Chabant <ludovic@chabant.com>
parents: 840
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129 def prepareRenderContext(self, ctx):
824
e01473c3ea7e Allow page source to post-process page config at the end of page loading
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parents: 792
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130 pass
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
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131
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Ludovic Chabant <ludovic@chabant.com>
parents: 840
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132 def onRouteFunctionUsed(self, route_params):
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Ludovic Chabant <ludovic@chabant.com>
parents: 840
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133 pass
826
7f235e65ef5d Allow PageSource to provide a custom assetor
Ben Artin <ben@artins.org>
parents: 792
diff changeset
134
852
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Ludovic Chabant <ludovic@chabant.com>
parents: 840
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135 def describe(self):
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Ludovic Chabant <ludovic@chabant.com>
parents: 840
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136 return None
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
137