Mercurial > hg > mercurial-crew-with-dirclash

annotate mercurial/hg.py @ 2798:8cd3e19bf4a5

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Add a doc string
author Matt Mackall <mpm@selenic.com>
date Thu, 03 Aug 2006 13:07:57 -0500
parents b1b1aa6f275c
children b550cd82f92a
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1 # hg.py - repository classes for mercurial
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2 #
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3 # Copyright 2005 Matt Mackall <mpm@selenic.com>
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4 #
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5 # This software may be used and distributed according to the terms
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6 # of the GNU General Public License, incorporated herein by reference.
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7
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8 from node import *
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9 from repo import *
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10 from demandload import *
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11 from i18n import gettext as _
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12 demandload(globals(), "localrepo bundlerepo httprepo sshrepo statichttprepo")
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13 demandload(globals(), "errno lock os shutil util")
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14
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15 def _local(path):
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16 return (os.path.isfile(path and util.drop_scheme('file', path)) and
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17 bundlerepo or localrepo)
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18
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19 schemes = {
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20 'bundle': bundlerepo,
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21 'file': _local,
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22 'hg': httprepo,
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23 'http': httprepo,
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24 'https': httprepo,
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25 'old-http': statichttprepo,
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26 'ssh': sshrepo,
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27 'static-http': statichttprepo,
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28 }
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29
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30 def _lookup(path):
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31 scheme = 'file'
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32 if path:
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33 c = path.find(':')
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34 if c > 0:
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35 scheme = path[:c]
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36 thing = schemes.get(scheme) or schemes['file']
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37 try:
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38 return thing(path)
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39 except TypeError:
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40 return thing
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41
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42 def islocal(repo):
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43 '''return true if repo or path is local'''
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44 if isinstance(repo, str):
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45 try:
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46 return _lookup(repo).islocal(repo)
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47 except AttributeError:
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48 return False
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49 return repo.local()
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50
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51 def repository(ui, path=None, create=False):
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52 """return a repository object for the specified path"""
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53 return _lookup(path).instance(ui, path, create)
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54
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55 def defaultdest(source):
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56 '''return default destination of clone if none is given'''
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57 return os.path.basename(os.path.normpath(source))
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58
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59 def clone(ui, source, dest=None, pull=False, rev=None, update=True,
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60 stream=False):
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61 """Make a copy of an existing repository.
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62
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63 Create a copy of an existing repository in a new directory. The
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64 source and destination are URLs, as passed to the repository
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65 function. Returns a pair of repository objects, the source and
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66 newly created destination.
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67
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68 The location of the source is added to the new repository's
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69 .hg/hgrc file, as the default to be used for future pulls and
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70 pushes.
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71
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72 If an exception is raised, the partly cloned/updated destination
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73 repository will be deleted.
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74
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75 Arguments:
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76
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77 source: repository object or URL
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78
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79 dest: URL of destination repository to create (defaults to base
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80 name of source repository)
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81
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82 pull: always pull from source repository, even in local case
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83
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84 stream: stream raw data uncompressed from repository (fast over
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85 LAN, slow over WAN)
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86
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87 rev: revision to clone up to (implies pull=True)
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88
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89 update: update working directory after clone completes, if
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90 destination is local repository
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91 """
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92 if isinstance(source, str):
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93 src_repo = repository(ui, source)
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94 else:
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95 src_repo = source
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96 source = src_repo.url()
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97
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98 if dest is None:
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99 dest = defaultdest(source)
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100
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101 def localpath(path):
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102 if path.startswith('file://'):
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103 return path[7:]
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104 if path.startswith('file:'):
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105 return path[5:]
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106 return path
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107
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108 dest = localpath(dest)
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109 source = localpath(source)
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110
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111 if os.path.exists(dest):
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112 raise util.Abort(_("destination '%s' already exists"), dest)
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113
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114 class DirCleanup(object):
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115 def __init__(self, dir_):
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116 self.rmtree = shutil.rmtree
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117 self.dir_ = dir_
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118 def close(self):
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119 self.dir_ = None
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120 def __del__(self):
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121 if self.dir_:
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122 self.rmtree(self.dir_, True)
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123
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124 dest_repo = None
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125 try:
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126 dest_repo = repository(ui, dest)
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127 raise util.Abort(_("destination '%s' already exists." % dest))
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128 except RepoError:
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129 dest_repo = repository(ui, dest, create=True)
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130
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131 dest_path = None
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132 dir_cleanup = None
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133 if dest_repo.local():
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134 dest_path = os.path.realpath(dest_repo.root)
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135 dir_cleanup = DirCleanup(dest_path)
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136
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137 abspath = source
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138 copy = False
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139 if src_repo.local() and dest_repo.local():
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140 abspath = os.path.abspath(source)
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141 copy = not pull and not rev
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142
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143 src_lock, dest_lock = None, None
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144 if copy:
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145 try:
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146 # we use a lock here because if we race with commit, we
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147 # can end up with extra data in the cloned revlogs that's
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148 # not pointed to by changesets, thus causing verify to
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149 # fail
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150 src_lock = src_repo.lock()
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151 except lock.LockException:
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152 copy = False
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153
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154 if copy:
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155 # we lock here to avoid premature writing to the target
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156 dest_lock = lock.lock(os.path.join(dest_path, ".hg", "lock"))
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157
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158 # we need to remove the (empty) data dir in dest so copyfiles
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159 # can do its work
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160 os.rmdir(os.path.join(dest_path, ".hg", "data"))
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161 files = "data 00manifest.d 00manifest.i 00changelog.d 00changelog.i"
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162 for f in files.split():
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163 src = os.path.join(source, ".hg", f)
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164 dst = os.path.join(dest_path, ".hg", f)
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165 try:
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166 util.copyfiles(src, dst)
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167 except OSError, inst:
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168 if inst.errno != errno.ENOENT:
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169 raise
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170
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171 # we need to re-init the repo after manually copying the data
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172 # into it
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173 dest_repo = repository(ui, dest)
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174
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175 else:
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176 revs = None
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177 if rev:
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178 if not src_repo.local():
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179 raise util.Abort(_("clone by revision not supported yet "
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180 "for remote repositories"))
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181 revs = [src_repo.lookup(r) for r in rev]
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182
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183 if dest_repo.local():
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184 dest_repo.clone(src_repo, heads=revs, stream=stream)
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185 elif src_repo.local():
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186 src_repo.push(dest_repo, revs=revs)
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187 else:
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188 raise util.Abort(_("clone from remote to remote not supported"))
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189
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190 if src_lock:
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191 src_lock.release()
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diff changeset
192
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193 if dest_repo.local():
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194 fp = dest_repo.opener("hgrc", "w", text=True)
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195 fp.write("[paths]\n")
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196 fp.write("default = %s\n" % abspath)
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197 fp.close()
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198
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199 if dest_lock:
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200 dest_lock.release()
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201
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202 if update:
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203 dest_repo.update(dest_repo.changelog.tip())
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204 if dir_cleanup:
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205 dir_cleanup.close()
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206
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207 return src_repo, dest_repo