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annotate piecrust/routing.py @ 342:d8677ad748f0

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chef: Fix pre-parsing.
author Ludovic Chabant <ludovic@chabant.com>
date Mon, 06 Apr 2015 22:28:03 -0700
parents 938be93215cb
children bf32be298b89
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import re
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2 import os.path
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3 import logging
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6 logger = logging.getLogger(__name__)
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7
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8
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9 route_re = re.compile(r'%((?P<qual>path):)?(?P<name>\w+)%')
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10 route_esc_re = re.compile(r'\\%((?P<qual>path)\\:)?(?P<name>\w+)\\%')
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11 template_func_re = re.compile(r'^(?P<name>\w+)\((?P<first_arg>\w+)'
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12 r'(?P<other_args>.*)\)\s*$')
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13 template_func_arg_re = re.compile(r',\s*(?P<arg>\w+)')
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14 ugly_url_cleaner = re.compile(r'\.html$')
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16
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17 class IRouteMetadataProvider(object):
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18 def getRouteMetadata(self):
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19 raise NotImplementedError()
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21
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22 class Route(object):
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23 """ Information about a route for a PieCrust application.
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24 Each route defines the "shape" of an URL and how it maps to
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25 sources and taxonomies.
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26 """
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27 def __init__(self, app, cfg):
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28 self.app = app
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29
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30 self.source_name = cfg['source']
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31 self.taxonomy_name = cfg.get('taxonomy')
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32
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33 self.pretty_urls = app.config.get('site/pretty_urls')
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34 self.trailing_slash = app.config.get('site/trailing_slash')
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35 self.pagination_suffix_format = app.config.get(
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36 '__cache/pagination_suffix_format')
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37 self.uri_root = app.config.get('site/root')
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38
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39 uri = cfg['url']
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40 self.uri_pattern = uri.lstrip('/')
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41 self.uri_format = route_re.sub(self._uriFormatRepl, self.uri_pattern)
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42 if app.config.get('site/show_debug_info'):
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43 self.uri_format += '?!debug'
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44
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45 # Get the straight-forward regex for matching this URI pattern.
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46 p = route_esc_re.sub(self._uriPatternRepl,
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47 re.escape(self.uri_pattern)) + '$'
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48 self.uri_re = re.compile(p)
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49
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50 # If the URI pattern has a 'path'-type component, we'll need to match
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51 # the versions for which that component is empty. So for instance if
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52 # we have `/foo/%path:bar%`, we may need to match `/foo` (note the
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53 # lack of a trailing slash). We have to build a special pattern (in
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54 # this case without that trailing slash) to match those situations.
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55 # (maybe there's a better way to do it but I can't think of any
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56 # right now)
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57 uri_pattern_no_path = (
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58 route_re.sub(self._uriNoPathRepl, self.uri_pattern)
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59 .replace('//', '/')
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60 .rstrip('/'))
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61 if uri_pattern_no_path != self.uri_pattern:
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62 p = route_esc_re.sub(self._uriPatternRepl,
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63 re.escape(uri_pattern_no_path)) + '$'
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64 self.uri_re_no_path = re.compile(p)
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65 else:
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66 self.uri_re_no_path = None
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67
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68 self.required_source_metadata = set()
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69 for m in route_re.finditer(self.uri_pattern):
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70 self.required_source_metadata.add(m.group('name'))
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71
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72 self.template_func = None
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73 self.template_func_name = None
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74 self.template_func_args = []
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75 self._createTemplateFunc(cfg.get('func'))
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76
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77 @property
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78 def source(self):
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79 for src in self.app.sources:
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80 if src.name == self.source_name:
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81 return src
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82 raise Exception("Can't find source '%s' for route '%'." % (
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83 self.source_name, self.uri))
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84
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85 @property
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86 def source_realm(self):
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87 return self.source.realm
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88
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89 def matchesMetadata(self, source_metadata):
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90 return self.required_source_metadata.issubset(source_metadata.keys())
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91
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92 def matchUri(self, uri):
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93 if not uri.startswith(self.uri_root):
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94 raise Exception("The given URI is not absolute: %s" % uri)
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95 uri = uri[len(self.uri_root):]
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96
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97 if not self.pretty_urls:
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98 uri = ugly_url_cleaner.sub('', uri)
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99 elif self.trailing_slash:
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100 uri = uri.rstrip('/')
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101
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102 m = self.uri_re.match(uri)
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103 if m:
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104 return m.groupdict()
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105 if self.uri_re_no_path:
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106 m = self.uri_re_no_path.match(uri)
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107 if m:
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108 return m.groupdict()
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109 return None
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110
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111 def getUri(self, source_metadata, *, sub_num=1, provider=None):
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112 if provider:
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113 source_metadata = dict(source_metadata)
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114 source_metadata.update(provider.getRouteMetadata())
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115
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116 #TODO: fix this hard-coded shit
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117 for key in ['year', 'month', 'day']:
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118 if key in source_metadata and isinstance(source_metadata[key], str):
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119 source_metadata[key] = int(source_metadata[key])
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120
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121 uri = self.uri_format % source_metadata
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122 suffix = None
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123 if sub_num > 1:
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124 # Note that we know the pagination suffix starts with a slash.
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125 suffix = self.pagination_suffix_format % {'num': sub_num}
256
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126
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127 if self.pretty_urls:
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128 # Output will be:
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129 # - `subdir/name`
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130 # - `subdir/name/2`
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131 # - `subdir/name.ext`
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132 # - `subdir/name.ext/2`
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133 if suffix:
262
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134 if uri == '':
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135 uri = suffix.lstrip('/')
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136 else:
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137 uri = uri.rstrip('/') + suffix
337
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138 if self.trailing_slash and uri != '':
256
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139 uri = uri.rstrip('/') + '/'
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140 else:
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141 # Output will be:
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142 # - `subdir/name.html`
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143 # - `subdir/name/2.html`
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144 # - `subdir/name.ext`
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145 # - `subdir/name/2.ext`
262
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146 if uri == '':
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147 if suffix:
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148 uri = suffix.lstrip('/') + '.html'
256
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149 else:
262
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150 base_uri, ext = os.path.splitext(uri)
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151 if not ext:
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152 ext = '.html'
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153 if suffix:
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154 uri = base_uri + suffix + ext
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155 else:
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156 uri = base_uri + ext
256
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157
329
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158 uri = self.uri_root + uri
235
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159 return uri
3
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160
334
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161 def slugifyTaxonomyTerm(self, term):
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162 #TODO: add options for transliterating and combining terms.
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163 if isinstance(term, tuple):
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164 return '/'.join(term)
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165 return term
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166
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167 def unslugifyTaxonomyTerm(self, term):
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168 #TODO: same as above.
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169 split_terms = term.split('/')
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170 if len(split_terms) == 1:
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171 return term
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172 return tuple(split_terms)
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173
3
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174 def _uriFormatRepl(self, m):
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175 name = m.group('name')
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176 #TODO: fix this hard-coded shit
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177 if name == 'year':
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178 return '%(year)04d'
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179 if name == 'month':
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180 return '%(month)02d'
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181 if name == 'day':
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182 return '%(day)02d'
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183 return '%(' + name + ')s'
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184
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185 def _uriPatternRepl(self, m):
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186 name = m.group('name')
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187 qualifier = m.group('qual')
334
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188 if qualifier == 'path' or self.taxonomy_name:
173
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189 return r'(?P<%s>[^\?]*)' % name
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190 return r'(?P<%s>[^/\?]+)' % name
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diff changeset
191
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192 def _uriNoPathRepl(self, m):
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193 name = m.group('name')
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194 qualifier = m.group('qual')
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195 if qualifier == 'path':
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196 return ''
3
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197 return r'(?P<%s>[^/\?]+)' % name
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198
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199 def _createTemplateFunc(self, func_def):
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200 if func_def is None:
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201 return
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202
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203 m = template_func_re.match(func_def)
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204 if m is None:
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205 raise Exception("Template function definition for route '%s' "
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206 "has invalid syntax: %s" %
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207 (self.uri_pattern, func_def))
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208
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209 self.template_func_name = m.group('name')
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210 self.template_func_args.append(m.group('first_arg'))
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211 arg_list = m.group('other_args')
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212 if arg_list:
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213 self.template_func_args += template_func_arg_re.findall(arg_list)
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214
334
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diff changeset
215 if self.taxonomy_name:
3
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216 # This will be a taxonomy route function... this means we can
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217 # have a variable number of parameters, but only one parameter
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218 # definition, which is the value.
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219 if len(self.template_func_args) != 1:
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220 raise Exception("Route '%s' is a taxonomy route and must have "
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221 "only one argument, which is the term value." %
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diff changeset
222 self.uri_pattern)
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223
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224 def template_func(*args):
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225 if len(args) == 0:
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226 raise Exception(
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227 "Route function '%s' expected at least one "
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228 "argument." % func_def)
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229
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230 # Term combinations can be passed as an array, or as multiple
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231 # arguments.
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232 values = args
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233 if len(args) == 1 and isinstance(args[0], list):
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234 values = args[0]
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235
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236 # We need to register this use of a taxonomy term.
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237 if len(values) == 1:
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238 registered_values = values[0]
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239 else:
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240 registered_values = tuple(values)
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241 eis = self.app.env.exec_info_stack
338
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parents: 337
diff changeset
242 cpi = eis.current_page_info.render_ctx.current_pass_info
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parents: 337
diff changeset
243 cpi.used_taxonomy_terms.add(
334
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diff changeset
244 (self.source_name, self.taxonomy_name,
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diff changeset
245 registered_values))
3
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246
334
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diff changeset
247 str_values = self.slugifyTaxonomyTerm(registered_values)
3
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diff changeset
248 term_name = self.template_func_args[0]
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249 metadata = {term_name: str_values}
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diff changeset
250
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251 return self.getUri(metadata)
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252
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253 else:
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254 # Normal route function.
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255 def template_func(*args):
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diff changeset
256 if len(args) != len(self.template_func_args):
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diff changeset
257 raise Exception(
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258 "Route function '%s' expected %d arguments, "
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259 "got %d." %
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260 (func_def, len(self.template_func_args),
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261 len(args)))
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262 metadata = {}
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263 for arg_name, arg_val in zip(self.template_func_args, args):
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264 metadata[arg_name] = arg_val
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265 return self.getUri(metadata)
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266
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267 self.template_func = template_func
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268
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269
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270 class CompositeRouteFunction(object):
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271 def __init__(self):
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272 self._funcs = []
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273 self._arg_names = None
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274
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275 def addFunc(self, route):
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276 if self._arg_names is None:
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277 self._arg_names = sorted(route.template_func_args)
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278
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279 if sorted(route.template_func_args) != self._arg_names:
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280 raise Exception("Cannot merge route function with arguments '%s' "
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281 "with route function with arguments '%s'." %
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282 (route.template_func_args, self._arg_names))
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283 self._funcs.append((route, route.template_func))
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284
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285 def __call__(self, *args, **kwargs):
334
b034f6f15e22 bake: Several bug taxonomy-related fixes for incorrect incremental bakes.
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286 if len(self._funcs) == 1 or len(args) == len(self._arg_names):
3
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287 f = self._funcs[0][1]
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288 return f(*args, **kwargs)
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289
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290 if len(args) == len(self._arg_names) + 1:
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291 f_args = args[:-1]
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292 for r, f in self._funcs:
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293 if r.source_name == args[-1]:
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294 return f(f_args, **kwargs)
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295 raise Exception("No such source: %s" % args[-1])
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296
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297 raise Exception("Incorrect number of arguments for route function. "
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298 "Expected '%s', got '%s'" % (self._arg_names, args))
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299