Mercurial > hg > decoupage
annotate decoupage/web.py @ 33:e384d4569ac3
include components necessary to make decoupage feel almost like a framework
author | k0s <k0scist@gmail.com> |
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date | Mon, 08 Feb 2010 11:40:57 -0500 |
parents | f306089d6def |
children | 527ccb76d043 |
rev | line source |
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adding decoupage from http://my-svn.assembla.com/svn/arbez/decoupage r355
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1 """ |
33
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2 decoupage: a view with webob to index and serve static content |
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3 """ |
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4 |
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5 import os |
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6 |
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7 from contenttransformer.app import FileTypeTransformer |
10 | 8 from formatters import formatters |
9 | |
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10 from genshi.builder import Markup |
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11 from genshi.template import TemplateLoader |
21 | 12 from genshi.template.base import TemplateError |
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13 from martini.config import ConfigMunger |
2 | 14 from paste.fileapp import FileApp |
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15 from pkg_resources import resource_filename |
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16 from pkg_resources import iter_entry_points |
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17 from webob import Request, Response, exc |
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18 |
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19 class Decoupage(object): |
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20 |
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21 ### class level variables |
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22 defaults = { 'auto_reload': 'False', |
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23 'configuration': None, |
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24 'directory': None, # directory to serve |
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25 'cascade': 'True', # whether to cascade configuration |
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26 'template': 'index.html', # XXX see below |
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27 'template_directories': '' # list of directories to look for templates |
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28 } |
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29 |
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30 def __init__(self, **app_conf): |
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31 |
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32 # set defaults from app configuration |
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33 kw = self.app_conf('decoupage', app_conf) |
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34 for key in self.defaults: |
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35 setattr(self, key, kw.get(key, self.defaults[key])) |
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36 |
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37 # configure defaults |
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38 self.auto_reload = self.auto_reload.lower() == 'true' |
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39 self.cascade = self.cascade.lower() == 'true' |
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40 self.directory = self.directory.rstrip(os.path.sep) |
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41 assert os.path.isdir(self.directory) |
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42 self.template_directories = self.template_directories.split() # no spaces in directory names, for now |
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43 assert sum([os.path.isdir(directory) for directory in self.template_directories]) == len(self.template_directories) |
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44 |
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45 # static file server |
2 | 46 self.fileserver = FileApp |
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47 |
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48 # pluggable index data formatters |
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49 self.formatters = {} |
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50 for formatter in iter_entry_points('decoupage.formatters'): |
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51 try: |
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52 _formatter = formatter.load() |
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53 template_dir = resource_filename(formatter.module_name, 'templates') |
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54 if template_dir not in self.template_directories and os.path.isdir(template_dir): |
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55 self.template_directories.append(template_dir) |
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56 except: |
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57 continue # XXX should probably raise |
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58 self.formatters[formatter.name] = _formatter |
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59 |
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60 # template loader |
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61 self.loader = TemplateLoader(self.template_directories, |
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62 auto_reload=self.auto_reload) |
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63 |
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64 |
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65 |
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66 ### methods dealing with HTTP |
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67 def __call__(self, environ, start_response): |
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68 request = Request(environ) |
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69 filename = request.path_info.strip('/') |
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70 path = os.path.join(self.directory, filename) |
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71 if os.path.exists(path): |
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72 if os.path.isdir(path): |
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73 |
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74 if not request.path_info.endswith('/'): |
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75 raise exc.HTTPMovedPermanently(add_slash=True) |
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76 |
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77 res = self.get(request) |
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78 return res(environ, start_response) |
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79 else: |
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80 conf = self.conf(request.path_info.rsplit('/',1)[0]) |
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81 if '/transformer' in conf: |
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82 args = [i.split('=', 1) for i in conf['/transformer'].split(',') if '=' in i] |
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83 fileserver = FileTypeTransformer(*args) |
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84 else: |
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85 fileserver = FileApp |
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86 |
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87 fileserver = fileserver(path) |
2 | 88 return fileserver(environ, start_response) |
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89 else: |
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90 raise exc.HTTPNotFound() |
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91 |
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92 |
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93 def get(self, request): |
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94 """ |
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95 return response to a GET requst |
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96 """ |
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97 # ensure a sane path |
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98 path = request.path_info.strip('/') |
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99 directory = os.path.join(self.directory, path) |
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100 path = '/%s' % path |
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101 |
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102 # get the configuraton |
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103 conf = self.conf(path) |
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104 |
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105 ### build data dictionary |
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106 files = self.filedata(path, directory, conf) |
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107 data = {'path': path, 'files': files, 'request': request } |
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108 |
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109 # defaults; TODO: make this better |
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110 data['title'] = conf.get('/title') |
15 | 111 data['directory'] = directory |
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112 data['include'] = None |
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113 data['css'] = () |
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114 data['scripts'] = () |
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115 data['icon'] = None |
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116 |
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117 # apply formatters |
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118 # XXX this should be cached if not self.auto_reload |
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119 if '/formatters' in conf: |
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120 # ordered list of formatters to be applied first |
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121 formatters = [ i for i in conf['/formatters'].split() |
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122 if i in self.formatters ] |
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123 else: |
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124 formatters = [] |
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125 for key in conf: |
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126 if key.startswith('/'): |
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127 key = key[1:] |
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128 if key in self.formatters and key not in formatters: |
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129 formatters.append(key) |
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130 for name in formatters: |
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131 formatter = self.formatters[name](conf.get('/%s' % name, '')) |
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132 formatter(request, data) |
10 | 133 |
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134 # render the template |
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135 template = conf.get('/template') |
20 | 136 local_index = False |
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137 if template is None: |
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138 if 'index.html' in [ f['name'] for f in files ]: |
20 | 139 local_index = os.path.join(directory, 'index.html') |
140 template = local_index | |
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141 else: |
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142 template = self.template |
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143 else: |
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144 if not os.path.isabs(template): |
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145 _template = os.path.join(directory, template) |
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146 if os.path.exists(_template): |
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147 template = _template |
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148 else: |
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149 for directory in self.template_directories: |
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150 if template in os.listdir(directory): |
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151 break |
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152 else: |
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153 raise IOError("template %s not found" % template) |
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154 |
20 | 155 try: |
21 | 156 template = self.loader.load(template) |
20 | 157 res = template.generate(**data).render('html', doctype='html') |
21 | 158 except TemplateError: |
20 | 159 if local_index: |
160 return self.fileserver(local_index) | |
161 raise | |
162 | |
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163 return Response(content_type='text/html', body=res) |
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164 |
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165 |
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166 ### internal methods |
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167 |
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168 def filedata(self, path, directory, conf): |
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169 files = [] |
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170 for i in os.listdir(directory): |
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171 files.append({'path' : '%s/%s' % (path.rstrip('/'), i), |
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172 'name': i, |
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173 'description': conf.get(i.lower(), None)}) |
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174 return files |
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175 |
10 | 176 def conf(self, path, cascade=None): |
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177 """returns configuration dictionary appropriate to a path""" |
10 | 178 if cascade is None: |
179 cascase = self.cascade | |
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180 |
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181 directory = os.path.join(self.directory, path.strip('/')) |
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182 if path.strip('/'): |
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183 path_tuple = tuple(path.strip('/').split('/')) |
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184 else: |
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185 path_tuple = () |
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186 |
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187 # return cached configuration |
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188 if hasattr(self, '_conf') and path_tuple in self._conf: |
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189 return self._conf[path_tuple] |
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190 |
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191 conf = {} |
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192 |
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193 # local configuration |
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194 ini_path = os.path.join(directory, 'index.ini') |
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195 if os.path.exists(ini_path): |
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196 _conf = ConfigMunger(ini_path).dict() |
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197 if len(_conf) == 1: |
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198 conf = _conf[_conf.keys()[0]].copy() |
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199 |
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200 # global configuration |
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201 if not conf and self.configuration and os.path.exists(self.configuration): |
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202 conf = ConfigMunger(self.configuration).dict().get('/%s' % path.rstrip('/'), {}) |
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203 |
10 | 204 # inherit and cascade configuration |
205 inherit_directory = None | |
206 if '/inherit' in conf: | |
207 inherit_directory = conf['/inherit'] | |
208 elif self.cascade and path_tuple: | |
209 inherit_directory = '/%s' % '/'.join(path_tuple[:-1]) | |
210 if inherit_directory: | |
211 parent_configuration = self.conf(inherit_directory) | |
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212 for key, value in parent_configuration.items(): |
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213 if key.startswith('/') and key not in conf: |
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214 conf[key] = value |
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215 |
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216 # cache configuration |
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217 if not self.auto_reload: |
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218 if not hasattr(self, '_conf'): |
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219 self._conf = {} |
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220 self._conf[path_tuple] = conf |
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221 |
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222 return conf |
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223 |
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224 def fmtrs(self, path): |
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225 formatters = [] |
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226 for key, value in self.conf(path).items(): |
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227 if key.startswith('/'): |
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228 key = key[1:] |
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229 if key in self.formatters: |
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230 formatter = self.formatters[key](value) |
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231 |
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232 |
fa2005f769eb
adding decoupage from http://my-svn.assembla.com/svn/arbez/decoupage r355
k0s <k0scist@gmail.com>
parents:
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233 def app_conf(self, keystr, app_conf): |
fa2005f769eb
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k0s <k0scist@gmail.com>
parents:
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234 keystr += '.' |
fa2005f769eb
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k0s <k0scist@gmail.com>
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235 return dict([(key.split(keystr, 1)[-1], value) |
fa2005f769eb
adding decoupage from http://my-svn.assembla.com/svn/arbez/decoupage r355
k0s <k0scist@gmail.com>
parents:
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236 for key, value in app_conf.items() |
fa2005f769eb
adding decoupage from http://my-svn.assembla.com/svn/arbez/decoupage r355
k0s <k0scist@gmail.com>
parents:
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237 if key.startswith(keystr) ]) |