Mercurial > piecrust2

annotate piecrust/page.py @ 67:563ce5dd02af

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I don't care what the YAML spec says, ordered maps are the only sane way.
author Ludovic Chabant <ludovic@chabant.com>
date Fri, 29 Aug 2014 16:42:15 -0700
parents fce061f8c2ed
children e293f08d954e
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rev   line source
3
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1 import re
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2 import sys
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3 import json
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4 import codecs
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5 import os.path
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6 import hashlib
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7 import logging
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8 import datetime
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9 import dateutil.parser
67
563ce5dd02af I don't care what the YAML spec says, ordered maps are the only sane way.
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10 import collections
49
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11 from werkzeug.utils import cached_property
3
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12 from piecrust.configuration import (Configuration, ConfigurationError,
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13 parse_config_header)
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14 from piecrust.environment import PHASE_PAGE_PARSING
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16
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17 logger = logging.getLogger(__name__)
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18
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19
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20 class PageConfiguration(Configuration):
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21 def __init__(self, values=None, validate=True):
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22 super(PageConfiguration, self).__init__(values, validate)
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23
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24 def _validateAll(self, values):
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25 values.setdefault('title', 'Untitled Page')
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26 values.setdefault('content_type', 'html')
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27 ppp = values.get('posts_per_page')
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28 if ppp is not None:
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29 values.setdefault('items_per_page', ppp)
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30 pf = values.get('posts_filters')
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31 if pf is not None:
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32 values.setdefault('items_filters', pf)
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33 return values
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34
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35
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36 class Page(object):
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37 def __init__(self, source, source_metadata, rel_path):
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38 self.source = source
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39 self.source_metadata = source_metadata
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40 self.rel_path = rel_path
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41 self._config = None
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42 self._raw_content = None
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43 self._datetime = None
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44
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45 @property
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46 def app(self):
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47 return self.source.app
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48
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49 @property
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50 def ref_spec(self):
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51 return '%s:%s' % (self.source.name, self.rel_path)
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52
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53 @cached_property
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54 def path(self):
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55 return self.source.resolveRef(self.rel_path)
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56
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57 @cached_property
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58 def path_mtime(self):
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59 return os.path.getmtime(self.path)
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60
3
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61 @property
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62 def config(self):
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63 self._load()
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64 return self._config
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65
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66 @property
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67 def raw_content(self):
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68 self._load()
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69 return self._raw_content
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70
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71 @property
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72 def datetime(self):
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73 if self._datetime is None:
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74 if 'datetime' in self.source_metadata:
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75 self._datetime = self.source_metadata['datetime']
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76 elif 'date' in self.source_metadata:
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77 page_date = self.source_metadata['date']
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78 timestr = self.config.get('time')
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79 if timestr is not None:
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80 try:
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81 time_dt = dateutil.parser.parse(timestr)
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82 except Exception as e:
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83 raise ConfigurationError(
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84 "Invalid time '%s' in page: %s" %
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85 (timestr, self.path), e)
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86 page_time = datetime.time(time_dt.hour, time_dt.minute, time_dt.second)
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87 else:
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88 page_time = datetime.time(0, 0, 0)
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89 self._datetime = datetime.datetime.combine(page_date, page_time)
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90 else:
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91 self._datetime = datetime.datetime.fromtimestamp(self.path_mtime)
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92 return self._datetime
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93
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94 @datetime.setter
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95 def datetime(self, value):
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96 self._datetime = value
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97
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98 def getSegment(self, name='content'):
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99 return self.raw_content[name]
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100
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101 def _load(self):
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102 if self._config is not None:
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103 return
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104
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105 eis = self.app.env.exec_info_stack
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106 eis.pushPage(self, PHASE_PAGE_PARSING, None)
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107 try:
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108 config, content = load_page(self.app, self.path, self.path_mtime)
3
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109 self._config = config
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110 self._raw_content = content
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111 finally:
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112 eis.popPage()
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113
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114
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115 class PageLoadingError(Exception):
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116 def __init__(self, path, inner=None):
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117 super(PageLoadingError, self).__init__(
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118 "Error loading page: %s" % path,
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119 inner)
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120
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121
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122 class ContentSegment(object):
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123 debug_render_func = 'debug_render'
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124
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125 def __init__(self, content=None, fmt=None):
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126 self.parts = []
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127 if content is not None:
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128 self.parts.append(ContentSegmentPart(content, fmt))
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129
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130 def debug_render(self):
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131 return '\n'.join([p.content for p in self.parts])
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132
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133
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134 class ContentSegmentPart(object):
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135 def __init__(self, content, fmt=None, line=-1):
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136 self.content = content
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137 self.fmt = fmt
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138 self.line = line
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139
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140 def __str__(self):
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141 return '%s [%s]' % (self.content, self.fmt or '<default>')
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142
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143
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144 def json_load_segments(data):
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145 segments = {}
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146 for key, seg_data in data.items():
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147 seg = ContentSegment()
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148 for p_data in seg_data:
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149 part = ContentSegmentPart(p_data['c'], p_data['f'], p_data['l'])
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150 seg.parts.append(part)
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151 segments[key] = seg
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152 return segments
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153
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154
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155 def json_save_segments(segments):
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156 data = {}
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157 for key, seg in segments.items():
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158 seg_data = []
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159 for part in seg.parts:
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160 p_data = {'c': part.content, 'f': part.fmt, 'l': part.line}
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161 seg_data.append(p_data)
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162 data[key] = seg_data
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163 return data
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164
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165
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166 def load_page(app, path, path_mtime=None):
3
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167 try:
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168 return _do_load_page(app, path, path_mtime)
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169 except Exception as e:
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170 logger.exception("Error loading page: %s" %
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171 os.path.relpath(path, app.root_dir))
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172 _, __, traceback = sys.exc_info()
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173 raise PageLoadingError(path, e).with_traceback(traceback)
3
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174
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175
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176 def _do_load_page(app, path, path_mtime):
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177 exec_info = app.env.exec_info_stack.current_page_info
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178 if exec_info is None:
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179 raise Exception("Loading page '%s' but not execution context has "
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180 "been created for it." % path)
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181
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182 # Check the cache first.
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183 cache = app.cache.getCache('pages')
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184 cache_path = "%s.json" % hashlib.md5(path.encode('utf8')).hexdigest()
49
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185 page_time = path_mtime or os.path.getmtime(path)
3
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186 if cache.isValid(cache_path, page_time):
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187 exec_info.was_cache_valid = True
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563ce5dd02af I don't care what the YAML spec says, ordered maps are the only sane way.
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188 cache_data = json.loads(cache.read(cache_path),
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189 object_pairs_hook=collections.OrderedDict)
3
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190 config = PageConfiguration(values=cache_data['config'],
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191 validate=False)
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192 content = json_load_segments(cache_data['content'])
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193 return config, content
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194
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195 # Nope, load the page from the source file.
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196 exec_info.was_cache_valid = False
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197 logger.debug("Loading page configuration from: %s" % path)
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198 with codecs.open(path, 'r', 'utf-8') as fp:
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199 raw = fp.read()
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200 header, offset = parse_config_header(raw)
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201
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202 if not 'format' in header:
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203 auto_formats = app.config.get('site/auto_formats')
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204 name, ext = os.path.splitext(path)
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205 header['format'] = auto_formats.get(ext, None)
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206
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207 config = PageConfiguration(header)
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208 content = parse_segments(raw, offset)
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209 config.set('segments', list(content.keys()))
3
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210
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211 # Save to the cache.
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212 cache_data = {
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213 'config': config.get(),
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214 'content': json_save_segments(content)}
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215 cache.write(cache_path, json.dumps(cache_data))
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216
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217 return config, content
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218
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219
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220 segment_pattern = re.compile(
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221 r"""^\-\-\-\s*(?P<name>\w+)(\:(?P<fmt>\w+))?\s*\-\-\-\s*$""",
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222 re.M)
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223 part_pattern = re.compile(
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diff changeset
224 r"""^<\-\-\s*(?P<fmt>\w+)\s*\-\->\s*$""",
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diff changeset
225 re.M)
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226
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227
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228 def parse_segments(raw, offset=0):
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229 matches = list(segment_pattern.finditer(raw, offset))
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230 num_matches = len(matches)
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231 if num_matches > 0:
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232 contents = {}
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233
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234 first_offset = matches[0].start()
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235 if first_offset > 0:
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236 # There's some default content segment at the beginning.
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237 seg = ContentSegment()
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238 seg.parts = parse_segment_parts(raw, offset, first_offset)
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239 contents['content'] = seg
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240
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241 for i in range(1, num_matches):
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242 m1 = matches[i - 1]
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243 m2 = matches[i]
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244 seg = ContentSegment()
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245 seg.parts = parse_segment_parts(raw, m1.end() + 1,
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246 m2.start(), m1.group('fmt'))
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247 contents[m1.group('name')] = seg
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248
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249 # Handle text past the last match.
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250 lastm = matches[-1]
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251 seg = ContentSegment()
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252 seg.parts = parse_segment_parts(raw, lastm.end() + 1,
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253 len(raw), lastm.group('fmt'))
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254 contents[lastm.group('name')] = seg
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255
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256 return contents
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257 else:
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258 # No segments, just content.
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259 seg = ContentSegment()
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260 seg.parts = parse_segment_parts(raw, offset, len(raw))
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261 return {'content': seg}
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262
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263
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264 def parse_segment_parts(raw, start, end, first_part_fmt=None):
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265 matches = list(part_pattern.finditer(raw, start, end))
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266 num_matches = len(matches)
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267 if num_matches > 0:
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268 parts = []
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269
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270 # First part, before the first format change.
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271 parts.append(
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272 ContentSegmentPart(raw[start:matches[0].start()],
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273 first_part_fmt,
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274 start))
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275
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276 for i in range(1, num_matches):
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277 m1 = matches[i - 1]
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278 m2 = matches[i]
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279 parts.append(
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280 ContentSegmentPart(
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281 raw[m1.end() + 1:m2.start()],
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282 m1.group('fmt'),
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283 m1.end() + 1))
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284
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285 lastm = matches[-1]
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286 parts.append(ContentSegmentPart(raw[lastm.end() + 1:end],
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287 lastm.group('fmt'),
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288 lastm.end() + 1))
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289
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290 return parts
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291 else:
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292 return [ContentSegmentPart(raw[start:end], first_part_fmt)]
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293