Mercurial > piecrust2

annotate piecrust/rendering.py @ 750:377f4b626e74 2.0.0rc1

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cm: Regenerate the CHANGELOG.
author Ludovic Chabant <ludovic@chabant.com>
date Thu, 09 Jun 2016 22:35:18 -0700
parents 606f6d57b5df
children df58592b40f8
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1 import re
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2 import os.path
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3 import copy
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4 import logging
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5 from werkzeug.utils import cached_property
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6 from piecrust.data.builder import (
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7 DataBuildingContext, build_page_data, build_layout_data)
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8 from piecrust.data.filters import (
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9 PaginationFilter, SettingFilterClause, page_value_accessor)
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10 from piecrust.fastpickle import _pickle_object, _unpickle_object
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11 from piecrust.sources.base import PageSource
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12 from piecrust.templating.base import TemplateNotFoundError, TemplatingError
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14
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15 logger = logging.getLogger(__name__)
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16
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17
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18 content_abstract_re = re.compile(r'^<!--\s*(more|(page)?break)\s*-->\s*$',
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19 re.MULTILINE)
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21
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22 class PageRenderingError(Exception):
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23 pass
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26 class TemplateEngineNotFound(Exception):
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27 pass
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29
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30 class QualifiedPage(object):
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31 def __init__(self, page, route, route_metadata):
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32 self.page = page
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33 self.route = route
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34 self.route_metadata = route_metadata
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35
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36 def getUri(self, sub_num=1):
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37 return self.route.getUri(self.route_metadata, sub_num=sub_num)
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38
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39 def __getattr__(self, name):
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40 return getattr(self.page, name)
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42
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43 class RenderedSegments(object):
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44 def __init__(self, segments, render_pass_info):
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45 self.segments = segments
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46 self.render_pass_info = render_pass_info
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47
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48
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49 class RenderedLayout(object):
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50 def __init__(self, content, render_pass_info):
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51 self.content = content
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52 self.render_pass_info = render_pass_info
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53
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54
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55 class RenderedPage(object):
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56 def __init__(self, page, uri, num=1):
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57 self.page = page
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58 self.uri = uri
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59 self.num = num
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60 self.data = None
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61 self.content = None
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62 self.render_info = [None, None]
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63
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64 @property
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65 def app(self):
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66 return self.page.app
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67
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68 def copyRenderInfo(self):
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69 return copy.deepcopy(self.render_info)
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71
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72 PASS_NONE = -1
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73 PASS_FORMATTING = 0
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74 PASS_RENDERING = 1
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77 RENDER_PASSES = [PASS_FORMATTING, PASS_RENDERING]
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79
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80 class RenderPassInfo(object):
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81 def __init__(self):
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82 self.used_source_names = set()
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83 self.used_pagination = False
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84 self.pagination_has_more = False
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85 self.used_assets = False
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86 self._custom_info = {}
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87
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88 def setCustomInfo(self, key, info):
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89 self._custom_info[key] = info
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90
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91 def getCustomInfo(self, key, default=None, create_if_missing=False):
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92 if create_if_missing:
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93 return self._custom_info.setdefault(key, default)
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94 return self._custom_info.get(key, default)
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97 class PageRenderingContext(object):
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98 def __init__(self, qualified_page, page_num=1,
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99 force_render=False, is_from_request=False):
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100 self.page = qualified_page
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101 self.page_num = page_num
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102 self.force_render = force_render
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103 self.is_from_request = is_from_request
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104 self.pagination_source = None
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105 self.pagination_filter = None
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106 self.custom_data = {}
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107 self.render_passes = [None, None] # Same length as RENDER_PASSES
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108 self._current_pass = PASS_NONE
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109
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110 @property
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111 def app(self):
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112 return self.page.app
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113
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114 @property
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115 def source_metadata(self):
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116 return self.page.source_metadata
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117
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118 @cached_property
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119 def uri(self):
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120 return self.page.getUri(self.page_num)
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121
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122 @property
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123 def current_pass_info(self):
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124 if self._current_pass != PASS_NONE:
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125 return self.render_passes[self._current_pass]
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126 return None
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127
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128 def setCurrentPass(self, rdr_pass):
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129 if rdr_pass != PASS_NONE:
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130 self.render_passes[rdr_pass] = RenderPassInfo()
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131 self._current_pass = rdr_pass
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132
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133 def setPagination(self, paginator):
338
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134 self._raiseIfNoCurrentPass()
415
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diff changeset
135 pass_info = self.current_pass_info
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diff changeset
136 if pass_info.used_pagination:
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137 raise Exception("Pagination has already been used.")
415
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diff changeset
138 assert paginator.is_loaded
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diff changeset
139 pass_info.used_pagination = True
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diff changeset
140 pass_info.pagination_has_more = paginator.has_more
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141 self.addUsedSource(paginator._source)
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142
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diff changeset
143 def addUsedSource(self, source):
338
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diff changeset
144 self._raiseIfNoCurrentPass()
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diff changeset
145 if isinstance(source, PageSource):
415
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diff changeset
146 pass_info = self.current_pass_info
338
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diff changeset
147 pass_info.used_source_names.add(source.name)
23
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diff changeset
148
338
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diff changeset
149 def _raiseIfNoCurrentPass(self):
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diff changeset
150 if self._current_pass == PASS_NONE:
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151 raise Exception("No rendering pass is currently active.")
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152
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153
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154 def render_page(ctx):
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155 eis = ctx.app.env.exec_info_stack
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156 eis.pushPage(ctx.page, ctx)
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157 try:
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158 # Build the data for both segment and layout rendering.
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159 with ctx.app.env.timerScope("BuildRenderData"):
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160 page_data = _build_render_data(ctx)
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161
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162 # Render content segments.
338
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diff changeset
163 ctx.setCurrentPass(PASS_FORMATTING)
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164 repo = ctx.app.env.rendered_segments_repository
411
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165 save_to_fs = True
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166 if ctx.app.env.fs_cache_only_for_main_page and not eis.is_main_page:
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167 save_to_fs = False
586
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168 with ctx.app.env.timerScope("PageRenderSegments"):
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169 if repo and not ctx.force_render:
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170 render_result = repo.get(
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171 ctx.uri,
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172 lambda: _do_render_page_segments(ctx.page, page_data),
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173 fs_cache_time=ctx.page.path_mtime,
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174 save_to_fs=save_to_fs)
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175 else:
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diff changeset
176 render_result = _do_render_page_segments(ctx.page, page_data)
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177 if repo:
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178 repo.put(ctx.uri, render_result, save_to_fs)
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179
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180 # Render layout.
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diff changeset
181 page = ctx.page
338
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diff changeset
182 ctx.setCurrentPass(PASS_RENDERING)
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183 layout_name = page.config.get('layout')
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184 if layout_name is None:
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185 layout_name = page.source.config.get('default_layout', 'default')
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186 null_names = ['', 'none', 'nil']
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187 if layout_name not in null_names:
586
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diff changeset
188 with ctx.app.env.timerScope("BuildRenderData"):
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189 build_layout_data(page, page_data, render_result['segments'])
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190
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diff changeset
191 with ctx.app.env.timerScope("PageRenderLayout"):
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192 layout_result = _do_render_layout(layout_name, page, page_data)
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193 else:
415
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diff changeset
194 layout_result = {
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195 'content': render_result['segments']['content'],
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diff changeset
196 'pass_info': None}
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197
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198 rp = RenderedPage(page, ctx.uri, ctx.page_num)
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199 rp.data = page_data
415
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diff changeset
200 rp.content = layout_result['content']
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diff changeset
201 rp.render_info[PASS_FORMATTING] = _unpickle_object(
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diff changeset
202 render_result['pass_info'])
415
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diff changeset
203 if layout_result['pass_info'] is not None:
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diff changeset
204 rp.render_info[PASS_RENDERING] = _unpickle_object(
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diff changeset
205 layout_result['pass_info'])
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diff changeset
206 return rp
522
094bdf2f7c4c serve: Say what page a rendering error happened in.
Ludovic Chabant <ludovic@chabant.com>
parents: 520
diff changeset
207 except Exception as ex:
715
a14371c5cda7 debug: Pass the exceptions untouched when debugging.
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parents: 711
diff changeset
208 if ctx.app.debug:
a14371c5cda7 debug: Pass the exceptions untouched when debugging.
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diff changeset
209 raise
711
ab5c6a8ae90a bake: Replace hard-coded taxonomy support with "generator" system.
Ludovic Chabant <ludovic@chabant.com>
parents: 698
diff changeset
210 logger.exception(ex)
574
bc23465ed1b4 bug: Fix a crash when some errors occur during page rendering.
Ludovic Chabant <ludovic@chabant.com>
parents: 522
diff changeset
211 page_rel_path = os.path.relpath(ctx.page.path, ctx.app.root_dir)
522
094bdf2f7c4c serve: Say what page a rendering error happened in.
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parents: 520
diff changeset
212 raise Exception("Error rendering page: %s" % page_rel_path) from ex
3
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diff changeset
213 finally:
338
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diff changeset
214 ctx.setCurrentPass(PASS_NONE)
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diff changeset
215 eis.popPage()
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diff changeset
216
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217
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diff changeset
218 def render_page_segments(ctx):
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diff changeset
219 eis = ctx.app.env.exec_info_stack
96
0445a2232de7 Improvements and fixes to incremental baking.
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diff changeset
220 eis.pushPage(ctx.page, ctx)
3
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diff changeset
221 try:
415
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diff changeset
222 ctx.setCurrentPass(PASS_FORMATTING)
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diff changeset
223 repo = ctx.app.env.rendered_segments_repository
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diff changeset
224 save_to_fs = True
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diff changeset
225 if ctx.app.env.fs_cache_only_for_main_page and not eis.is_main_page:
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diff changeset
226 save_to_fs = False
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diff changeset
227 if repo and not ctx.force_render:
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diff changeset
228 render_result = repo.get(
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diff changeset
229 ctx.uri,
419
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diff changeset
230 lambda: _do_render_page_segments_from_ctx(ctx),
415
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parents: 411
diff changeset
231 fs_cache_time=ctx.page.path_mtime,
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parents: 411
diff changeset
232 save_to_fs=save_to_fs)
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parents: 411
diff changeset
233 else:
419
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diff changeset
234 render_result = _do_render_page_segments_from_ctx(ctx)
415
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parents: 411
diff changeset
235 if repo:
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diff changeset
236 repo.put(ctx.uri, render_result, save_to_fs)
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237 finally:
338
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diff changeset
238 ctx.setCurrentPass(PASS_NONE)
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diff changeset
239 eis.popPage()
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diff changeset
240
415
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diff changeset
241 rs = RenderedSegments(
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diff changeset
242 render_result['segments'],
719
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parents: 715
diff changeset
243 _unpickle_object(render_result['pass_info']))
415
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diff changeset
244 return rs
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diff changeset
245
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diff changeset
246
0e9a94b7fdfa bake: Improve bake record information.
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diff changeset
247 def _build_render_data(ctx):
419
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diff changeset
248 with ctx.app.env.timerScope("PageDataBuild"):
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diff changeset
249 data_ctx = DataBuildingContext(ctx.page, page_num=ctx.page_num)
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parents: 415
diff changeset
250 data_ctx.pagination_source = ctx.pagination_source
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parents: 415
diff changeset
251 data_ctx.pagination_filter = ctx.pagination_filter
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parents: 415
diff changeset
252 page_data = build_page_data(data_ctx)
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parents: 415
diff changeset
253 if ctx.custom_data:
440
32c7c2d219d2 performance: Refactor how data is managed to reduce copying.
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parents: 430
diff changeset
254 page_data._appendMapping(ctx.custom_data)
419
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parents: 415
diff changeset
255 return page_data
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parents: 415
diff changeset
256
6801ad5aa1d4 internal: Optimize page segments rendering.
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parents: 415
diff changeset
257
6801ad5aa1d4 internal: Optimize page segments rendering.
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diff changeset
258 def _do_render_page_segments_from_ctx(ctx):
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diff changeset
259 page_data = _build_render_data(ctx)
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parents: 415
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260 return _do_render_page_segments(ctx.page, page_data)
415
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261
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262
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263 def _do_render_page_segments(page, page_data):
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264 app = page.app
415
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265
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266 cpi = app.env.exec_info_stack.current_page_info
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267 assert cpi is not None
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268 assert cpi.page == page
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269
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270 engine_name = page.config.get('template_engine')
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271 format_name = page.config.get('format')
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272
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273 engine = get_template_engine(app, engine_name)
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274
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275 formatted_segments = {}
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276 for seg_name, seg in page.segments.items():
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474c9882decf Upgrade to Python 3.
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277 seg_text = ''
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278 for seg_part in seg.parts:
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279 part_format = seg_part.fmt or format_name
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diff changeset
280 try:
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281 with app.env.timerScope(engine.__class__.__name__):
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96d363e2da4b templating: Let Jinja2 cache the parsed template for page contents.
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282 part_text = engine.renderSegmentPart(
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diff changeset
283 page.path, seg_part, page_data)
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284 except TemplatingError as err:
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285 err.lineno += seg_part.line
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286 raise err
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287
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288 part_text = format_text(app, part_format, part_text)
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289 seg_text += part_text
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290 formatted_segments[seg_name] = seg_text
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291
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292 if seg_name == 'content':
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293 m = content_abstract_re.search(seg_text)
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294 if m:
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295 offset = m.start()
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296 content_abstract = seg_text[:offset]
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297 formatted_segments['content.abstract'] = content_abstract
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298
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diff changeset
299 pass_info = cpi.render_ctx.render_passes[PASS_FORMATTING]
415
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diff changeset
300 res = {
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301 'segments': formatted_segments,
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302 'pass_info': _pickle_object(pass_info)}
415
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diff changeset
303 return res
3
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304
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305
415
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diff changeset
306 def _do_render_layout(layout_name, page, layout_data):
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diff changeset
307 cpi = page.app.env.exec_info_stack.current_page_info
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diff changeset
308 assert cpi is not None
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diff changeset
309 assert cpi.page == page
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diff changeset
310
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311 names = layout_name.split(',')
427
3b658190c02b performance: Compute default layout extensions only once.
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diff changeset
312 default_exts = page.app.env.default_layout_extensions
3
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diff changeset
313 full_names = []
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314 for name in names:
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diff changeset
315 if '.' not in name:
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diff changeset
316 for ext in default_exts:
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317 full_names.append(name + ext)
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diff changeset
318 else:
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319 full_names.append(name)
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diff changeset
320
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diff changeset
321 _, engine_name = os.path.splitext(full_names[0])
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diff changeset
322 engine_name = engine_name.lstrip('.')
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diff changeset
323 engine = get_template_engine(page.app, engine_name)
183
fff195335d0a render: When a template engine can't be found, show the correct name in the error.
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parents: 174
diff changeset
324
153
1c3d229158ba Make a nice error message when a layout hasn't been found.
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parents: 128
diff changeset
325 try:
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diff changeset
326 output = engine.renderFile(full_names, layout_data)
1c3d229158ba Make a nice error message when a layout hasn't been found.
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parents: 128
diff changeset
327 except TemplateNotFoundError as ex:
711
ab5c6a8ae90a bake: Replace hard-coded taxonomy support with "generator" system.
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parents: 698
diff changeset
328 logger.exception(ex)
153
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diff changeset
329 msg = "Can't find template for page: %s\n" % page.path
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diff changeset
330 msg += "Looked for: %s" % ', '.join(full_names)
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diff changeset
331 raise Exception(msg) from ex
415
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diff changeset
332
698
33ab9badfd7a render: Change how we store render passes info.
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diff changeset
333 pass_info = cpi.render_ctx.render_passes[PASS_RENDERING]
719
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diff changeset
334 res = {'content': output, 'pass_info': _pickle_object(pass_info)}
415
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diff changeset
335 return res
3
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parents:
diff changeset
336
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parents:
diff changeset
337
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diff changeset
338 def get_template_engine(app, engine_name):
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parents:
diff changeset
339 if engine_name == 'html':
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diff changeset
340 engine_name = None
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diff changeset
341 engine_name = engine_name or app.config.get('site/default_template_engine')
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diff changeset
342 for engine in app.plugin_loader.getTemplateEngines():
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parents:
diff changeset
343 if engine_name in engine.ENGINE_NAMES:
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diff changeset
344 return engine
183
fff195335d0a render: When a template engine can't be found, show the correct name in the error.
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parents: 174
diff changeset
345 raise TemplateEngineNotFound("No such template engine: %s" % engine_name)
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parents: 174
diff changeset
346
3
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parents:
diff changeset
347
128
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diff changeset
348 def format_text(app, format_name, txt, exact_format=False):
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diff changeset
349 if exact_format and not format_name:
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diff changeset
350 raise Exception("You need to specify a format name.")
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diff changeset
351
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diff changeset
352 format_count = 0
3
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diff changeset
353 format_name = format_name or app.config.get('site/default_format')
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parents:
diff changeset
354 for fmt in app.plugin_loader.getFormatters():
457
7d868afc6791 rendering: Truly skip formatters that are not enabled.
Ludovic Chabant <ludovic@chabant.com>
parents: 454
diff changeset
355 if not fmt.enabled:
7d868afc6791 rendering: Truly skip formatters that are not enabled.
Ludovic Chabant <ludovic@chabant.com>
parents: 454
diff changeset
356 continue
3
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parents:
diff changeset
357 if fmt.FORMAT_NAMES is None or format_name in fmt.FORMAT_NAMES:
411
e7b865f8f335 bake: Enable multiprocess baking.
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parents: 369
diff changeset
358 with app.env.timerScope(fmt.__class__.__name__):
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parents: 369
diff changeset
359 txt = fmt.render(format_name, txt)
128
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diff changeset
360 format_count += 1
3
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diff changeset
361 if fmt.OUTPUT_FORMAT is not None:
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parents:
diff changeset
362 format_name = fmt.OUTPUT_FORMAT
128
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parents: 96
diff changeset
363 if exact_format and format_count == 0:
28444014ce7d Fix error reporting and counting of lines.
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diff changeset
364 raise Exception("No such format: %s" % format_name)
3
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parents:
diff changeset
365 return txt
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parents:
diff changeset
366