Mercurial > piecrust2

annotate piecrust/sources/base.py @ 854:08e02c2a2a1a

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core: Keep refactoring, this time to prepare for generator sources. - Make a few APIs simpler. - Content pipelines create their own jobs, so that generator sources can keep aborting in `getContents`, but rely on their pipeline to generate pages for baking.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 04 Jun 2017 23:34:28 -0700
parents f070a4fc033c
children 448710d84121
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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_PARENT_GROUP = 1
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17 REL_LOGICAL_PARENT_ITEM = 2
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18 REL_LOGICAl_CHILD_GROUP = 3
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19 REL_ASSETS = 10
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22 logger = logging.getLogger(__name__)
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25 class SourceNotFoundError(Exception):
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26 pass
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29 class InsufficientRouteParameters(Exception):
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30 pass
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33 class AbortedSourceUseError(Exception):
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34 pass
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36
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37 class GeneratedContentException(Exception):
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38 pass
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41 CONTENT_TYPE_PAGE = 0
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42 CONTENT_TYPE_ASSET = 1
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44
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45 class ContentItem:
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46 """ Describes a piece of content.
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47
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48 Some known metadata that PieCrust will use include:
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49 - `date`: A `datetime.date` object that will set the date of the page.
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50 - `datetime`: A `datetime.datetime` object that will set the date and
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51 time of the page.
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52 - `route_params`: A dictionary of route parameters to generate the
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53 URL to the content.
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54 - `config`: A dictionary of configuration settings to merge into the
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55 settings found in the content itself.
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56 """
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57 def __init__(self, spec, metadata):
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58 self.spec = spec
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59 self.metadata = metadata
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60
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61 @property
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62 def is_group(self):
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63 return False
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65
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66 class ContentGroup:
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67 """ Describes a group of `ContentItem`s.
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68 """
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69 def __init__(self, spec, metadata):
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70 self.spec = spec
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71 self.metadata = metadata
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72
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73 @property
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74 def is_group(self):
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75 return True
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77
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78 class ContentSource:
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79 """ A source for content.
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80 """
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81 DEFAULT_PIPELINE_NAME = None
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82
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83 def __init__(self, app, name, config):
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84 self.app = app
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85 self.name = name
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86 self.config = config or {}
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88 @property
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89 def is_theme_source(self):
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90 return self.config['realm'] == REALM_THEME
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92 @property
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93 def root_dir(self):
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94 if self.is_theme_source:
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95 return self.app.theme_dir
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96 return self.app.root_dir
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97
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98 @cached_property
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99 def route(self):
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100 return self.app.getSourceRoute(self.name)
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101
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102 def openItem(self, item, mode='r', **kwargs):
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103 raise NotImplementedError()
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104
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105 def getItemMtime(self, item):
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106 raise NotImplementedError()
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107
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108 def getAllContents(self):
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109 stack = collections.deque()
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110 stack.append(None)
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111 while len(stack) > 0:
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112 cur = stack.popleft()
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113 try:
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114 contents = self.getContents(cur)
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115 except GeneratedContentException:
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116 continue
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117 if contents is not None:
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118 for c in contents:
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119 if c.is_group:
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120 stack.append(c)
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121 else:
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122 yield c
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123
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124 def getContents(self, group):
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125 raise NotImplementedError("'%s' doesn't implement 'getContents'." %
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126 self.__class__)
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Ludovic Chabant <ludovic@chabant.com>
parents: 840
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127
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Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
128 def getRelatedContents(self, item, relationship):
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Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
129 raise NotImplementedError()
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Ludovic Chabant <ludovic@chabant.com>
parents: 840
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130
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Ludovic Chabant <ludovic@chabant.com>
parents: 840
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131 def findContent(self, route_params):
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Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
132 raise NotImplementedError()
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
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133
792
58ebf50235a5 routing: Simplify how routes are defined.
Ludovic Chabant <ludovic@chabant.com>
parents: 711
diff changeset
134 def getSupportedRouteParameters(self):
58ebf50235a5 routing: Simplify how routes are defined.
Ludovic Chabant <ludovic@chabant.com>
parents: 711
diff changeset
135 raise NotImplementedError()
58ebf50235a5 routing: Simplify how routes are defined.
Ludovic Chabant <ludovic@chabant.com>
parents: 711
diff changeset
136
852
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Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
137 def prepareRenderContext(self, ctx):
824
e01473c3ea7e Allow page source to post-process page config at the end of page loading
Ben Artin <ben@artins.org>
parents: 792
diff changeset
138 pass
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
139
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
140 def onRouteFunctionUsed(self, route_params):
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
141 pass
826
7f235e65ef5d Allow PageSource to provide a custom assetor
Ben Artin <ben@artins.org>
parents: 792
diff changeset
142
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
143 def describe(self):
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Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
144 return None
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents: 840
diff changeset
145