Mercurial > kallithea

annotate rhodecode/lib/middleware/pygrack.py @ 3840:dc4644865e8b beta

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Implemented simple gist functionality ref #530. - creation of public/private gists with given lifetime - rhodecode-gist CLI for quick gist creation
author Marcin Kuzminski <marcin@python-works.com>
date Sat, 11 May 2013 20:24:02 +0200
parents d7488551578e
children ffd45b185016
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import os
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2 import socket
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3 import logging
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4 import subprocess
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5 import traceback
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6
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7 from webob import Request, Response, exc
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8
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9 import rhodecode
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10 from rhodecode.lib.vcs import subprocessio
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12 log = logging.getLogger(__name__)
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15 class FileWrapper(object):
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16
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17 def __init__(self, fd, content_length):
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18 self.fd = fd
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19 self.content_length = content_length
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20 self.remain = content_length
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21
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22 def read(self, size):
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23 if size <= self.remain:
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24 try:
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25 data = self.fd.read(size)
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26 except socket.error:
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27 raise IOError(self)
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28 self.remain -= size
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29 elif self.remain:
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30 data = self.fd.read(self.remain)
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31 self.remain = 0
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32 else:
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33 data = None
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34 return data
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35
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36 def __repr__(self):
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37 return '<FileWrapper %s len: %s, read: %s>' % (
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38 self.fd, self.content_length, self.content_length - self.remain
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39 )
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41
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42 class GitRepository(object):
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43 git_folder_signature = set(['config', 'head', 'info', 'objects', 'refs'])
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44 commands = ['git-upload-pack', 'git-receive-pack']
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45
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46 def __init__(self, repo_name, content_path, extras):
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47 files = set([f.lower() for f in os.listdir(content_path)])
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48 if not (self.git_folder_signature.intersection(files)
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49 == self.git_folder_signature):
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50 raise OSError('%s missing git signature' % content_path)
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51 self.content_path = content_path
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52 self.valid_accepts = ['application/x-%s-result' %
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53 c for c in self.commands]
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54 self.repo_name = repo_name
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55 self.extras = extras
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56
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57 def _get_fixedpath(self, path):
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58 """
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59 Small fix for repo_path
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60
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61 :param path:
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62 """
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63 return path.split(self.repo_name, 1)[-1].strip('/')
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64
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65 def inforefs(self, request, environ):
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66 """
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67 WSGI Response producer for HTTP GET Git Smart
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68 HTTP /info/refs request.
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69 """
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70
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71 git_command = request.GET.get('service')
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72 if git_command not in self.commands:
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73 log.debug('command %s not allowed' % git_command)
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74 return exc.HTTPMethodNotAllowed()
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75
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76 # note to self:
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77 # please, resist the urge to add '\n' to git capture and increment
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78 # line count by 1.
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79 # The code in Git client not only does NOT need '\n', but actually
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80 # blows up if you sprinkle "flush" (0000) as "0001\n".
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81 # It reads binary, per number of bytes specified.
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82 # if you do add '\n' as part of data, count it.
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83 server_advert = '# service=%s' % git_command
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84 packet_len = str(hex(len(server_advert) + 4)[2:].rjust(4, '0')).lower()
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85 _git_path = rhodecode.CONFIG.get('git_path', 'git')
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86 try:
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87 out = subprocessio.SubprocessIOChunker(
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88 r'%s %s --stateless-rpc --advertise-refs "%s"' % (
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89 _git_path, git_command[4:], self.content_path),
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90 starting_values=[
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91 packet_len + server_advert + '0000'
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92 ]
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93 )
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94 except EnvironmentError, e:
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95 log.error(traceback.format_exc())
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96 raise exc.HTTPExpectationFailed()
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97 resp = Response()
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98 resp.content_type = 'application/x-%s-advertisement' % str(git_command)
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99 resp.charset = None
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100 resp.app_iter = out
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101 return resp
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102
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103 def backend(self, request, environ):
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104 """
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105 WSGI Response producer for HTTP POST Git Smart HTTP requests.
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106 Reads commands and data from HTTP POST's body.
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107 returns an iterator obj with contents of git command's
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108 response to stdout
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109 """
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110 git_command = self._get_fixedpath(request.path_info)
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111 if git_command not in self.commands:
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112 log.debug('command %s not allowed' % git_command)
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113 return exc.HTTPMethodNotAllowed()
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114
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115 if 'CONTENT_LENGTH' in environ:
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116 inputstream = FileWrapper(environ['wsgi.input'],
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117 request.content_length)
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118 else:
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119 inputstream = environ['wsgi.input']
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120
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121 try:
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122 gitenv = os.environ
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123 # forget all configs
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124 gitenv['GIT_CONFIG_NOGLOBAL'] = '1'
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125 opts = dict(
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126 env=gitenv,
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127 cwd=os.getcwd()
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128 )
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129 cmd = r'git %s --stateless-rpc "%s"' % (git_command[4:],
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130 self.content_path),
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131 log.debug('handling cmd %s' % cmd)
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132 out = subprocessio.SubprocessIOChunker(
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133 cmd,
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134 inputstream=inputstream,
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135 **opts
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136 )
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137 except EnvironmentError, e:
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138 log.error(traceback.format_exc())
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139 raise exc.HTTPExpectationFailed()
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140
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141 if git_command in [u'git-receive-pack']:
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142 # updating refs manually after each push.
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143 # Needed for pre-1.7.0.4 git clients using regular HTTP mode.
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144 _git_path = rhodecode.CONFIG.get('git_path', 'git')
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145 cmd = (u'%s --git-dir "%s" '
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146 'update-server-info' % (_git_path, self.content_path))
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147 log.debug('handling cmd %s' % cmd)
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148 subprocess.call(cmd, shell=True)
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149
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150 resp = Response()
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151 resp.content_type = 'application/x-%s-result' % git_command.encode('utf8')
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152 resp.charset = None
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153 resp.app_iter = out
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154 return resp
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155
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156 def __call__(self, environ, start_response):
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157 request = Request(environ)
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158 _path = self._get_fixedpath(request.path_info)
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159 if _path.startswith('info/refs'):
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160 app = self.inforefs
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161 elif [a for a in self.valid_accepts if a in request.accept]:
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162 app = self.backend
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163 try:
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164 resp = app(request, environ)
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165 except exc.HTTPException, e:
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166 resp = e
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167 log.error(traceback.format_exc())
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168 except Exception, e:
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169 log.error(traceback.format_exc())
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170 resp = exc.HTTPInternalServerError()
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171 return resp(environ, start_response)
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172
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173
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174 class GitDirectory(object):
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175
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176 def __init__(self, repo_root, repo_name, extras):
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177 repo_location = os.path.join(repo_root, repo_name)
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178 if not os.path.isdir(repo_location):
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179 raise OSError(repo_location)
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180
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181 self.content_path = repo_location
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182 self.repo_name = repo_name
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183 self.repo_location = repo_location
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184 self.extras = extras
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185
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186 def __call__(self, environ, start_response):
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187 content_path = self.content_path
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188 try:
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189 app = GitRepository(self.repo_name, content_path, self.extras)
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190 except (AssertionError, OSError):
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191 content_path = os.path.join(content_path, '.git')
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192 if os.path.isdir(content_path):
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193 app = GitRepository(self.repo_name, content_path, self.extras)
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194 else:
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195 return exc.HTTPNotFound()(environ, start_response)
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196 return app(environ, start_response)
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197
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198
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199 def make_wsgi_app(repo_name, repo_root, extras):
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200 return GitDirectory(repo_root, repo_name, extras)