Mercurial > hg > mercurial-crew-with-dirclash

annotate hgext/convert/__init__.py @ 4534:cc9b79216a76

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Split convert extension into common and repository type modules
author Brendan Cully <brendan@kublai.com>
date Sun, 10 Jun 2007 20:08:47 -0700
parents c3a78a49d7f0
children 9855939d0c82
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rev   line source
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1 # convert.py Foreign SCM converter
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2 #
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3 # Copyright 2005, 2006 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 common import NoRepo
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9 from cvs import convert_cvs
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10 from git import convert_git
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11 from hg import convert_mercurial
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12
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13 import os
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14 from mercurial import hg, ui, util, commands
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15
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16 commands.norepo += " convert"
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17
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18 converters = [convert_cvs, convert_git, convert_mercurial]
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19
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20 def converter(ui, path):
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21 if not os.path.isdir(path):
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22 raise util.Abort("%s: not a directory" % path)
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23 for c in converters:
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24 try:
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25 return c(ui, path)
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26 except NoRepo:
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27 pass
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28 raise util.Abort("%s: unknown repository type" % path)
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29
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30 class convert(object):
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31 def __init__(self, ui, source, dest, mapfile, opts):
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32
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33 self.source = source
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34 self.dest = dest
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35 self.ui = ui
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36 self.mapfile = mapfile
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37 self.opts = opts
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38 self.commitcache = {}
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39
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40 self.map = {}
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41 try:
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42 for l in file(self.mapfile):
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43 sv, dv = l[:-1].split()
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44 self.map[sv] = dv
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45 except IOError:
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46 pass
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47
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48 def walktree(self, heads):
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49 visit = heads
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50 known = {}
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51 parents = {}
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52 while visit:
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53 n = visit.pop(0)
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54 if n in known or n in self.map: continue
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55 known[n] = 1
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56 self.commitcache[n] = self.source.getcommit(n)
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57 cp = self.commitcache[n].parents
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58 for p in cp:
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59 parents.setdefault(n, []).append(p)
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60 visit.append(p)
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61
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62 return parents
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63
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64 def toposort(self, parents):
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65 visit = parents.keys()
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66 seen = {}
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67 children = {}
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68
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69 while visit:
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70 n = visit.pop(0)
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71 if n in seen: continue
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72 seen[n] = 1
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73 pc = 0
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74 if n in parents:
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75 for p in parents[n]:
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76 if p not in self.map: pc += 1
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77 visit.append(p)
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78 children.setdefault(p, []).append(n)
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79 if not pc: root = n
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80
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81 s = []
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82 removed = {}
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83 visit = children.keys()
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84 while visit:
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85 n = visit.pop(0)
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86 if n in removed: continue
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87 dep = 0
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88 if n in parents:
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89 for p in parents[n]:
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90 if p in self.map: continue
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91 if p not in removed:
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92 # we're still dependent
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93 visit.append(n)
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94 dep = 1
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95 break
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96
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97 if not dep:
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98 # all n's parents are in the list
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99 removed[n] = 1
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100 if n not in self.map:
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101 s.append(n)
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102 if n in children:
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103 for c in children[n]:
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104 visit.insert(0, c)
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105
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106 if self.opts.get('datesort'):
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107 depth = {}
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108 for n in s:
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109 depth[n] = 0
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110 pl = [p for p in self.commitcache[n].parents
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111 if p not in self.map]
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112 if pl:
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113 depth[n] = max([depth[p] for p in pl]) + 1
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114
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115 s = [(depth[n], self.commitcache[n].date, n) for n in s]
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116 s.sort()
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117 s = [e[2] for e in s]
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118
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119 return s
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120
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121 def copy(self, rev):
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122 c = self.commitcache[rev]
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123 files = self.source.getchanges(rev)
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124
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125 for f, v in files:
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126 try:
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127 data = self.source.getfile(f, v)
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128 except IOError, inst:
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129 self.dest.delfile(f)
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130 else:
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131 e = self.source.getmode(f, v)
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132 self.dest.putfile(f, e, data)
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133
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134 r = [self.map[v] for v in c.parents]
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135 f = [f for f, v in files]
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136 self.map[rev] = self.dest.putcommit(f, r, c)
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137 file(self.mapfile, "a").write("%s %s\n" % (rev, self.map[rev]))
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138
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139 def convert(self):
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140 self.ui.status("scanning source...\n")
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141 heads = self.source.getheads()
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142 parents = self.walktree(heads)
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143 self.ui.status("sorting...\n")
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144 t = self.toposort(parents)
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145 num = len(t)
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146 c = None
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147
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148 self.ui.status("converting...\n")
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149 for c in t:
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150 num -= 1
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151 desc = self.commitcache[c].desc
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152 if "\n" in desc:
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153 desc = desc.splitlines()[0]
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154 self.ui.status("%d %s\n" % (num, desc))
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155 self.copy(c)
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156
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157 tags = self.source.gettags()
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158 ctags = {}
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159 for k in tags:
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160 v = tags[k]
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161 if v in self.map:
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162 ctags[k] = self.map[v]
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163
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164 if c and ctags:
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165 nrev = self.dest.puttags(ctags)
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166 # write another hash correspondence to override the previous
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167 # one so we don't end up with extra tag heads
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168 if nrev:
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169 file(self.mapfile, "a").write("%s %s\n" % (c, nrev))
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170
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171 def _convert(ui, src, dest=None, mapfile=None, **opts):
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172 '''Convert a foreign SCM repository to a Mercurial one.
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173
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174 Accepted source formats:
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175 - GIT
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176 - CVS
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177
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178 Accepted destination formats:
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179 - Mercurial
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180
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181 If destination isn't given, a new Mercurial repo named <src>-hg will
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182 be created. If <mapfile> isn't given, it will be put in a default
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183 location (<dest>/.hg/shamap by default)
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184
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185 The <mapfile> is a simple text file that maps each source commit ID to
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186 the destination ID for that revision, like so:
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187
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188 <source ID> <destination ID>
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189
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190 If the file doesn't exist, it's automatically created. It's updated
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191 on each commit copied, so convert-repo can be interrupted and can
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192 be run repeatedly to copy new commits.
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193 '''
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194
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195 srcc = converter(ui, src)
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196 if not hasattr(srcc, "getcommit"):
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197 raise util.Abort("%s: can't read from this repo type" % src)
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198
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199 if not dest:
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200 dest = src + "-hg"
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201 ui.status("assuming destination %s\n" % dest)
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202
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203 # Try to be smart and initalize things when required
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204 if os.path.isdir(dest):
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205 if len(os.listdir(dest)) > 0:
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206 try:
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207 hg.repository(ui, dest)
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208 ui.status("destination %s is a Mercurial repository\n" % dest)
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209 except hg.RepoError:
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210 raise util.Abort(
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211 "destination directory %s is not empty.\n"
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212 "Please specify an empty directory to be initialized\n"
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213 "or an already initialized mercurial repository"
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214 % dest)
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215 else:
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216 ui.status("initializing destination %s repository\n" % dest)
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217 hg.repository(ui, dest, create=True)
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218 elif os.path.exists(dest):
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219 raise util.Abort("destination %s exists and is not a directory" % dest)
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220 else:
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221 ui.status("initializing destination %s repository\n" % dest)
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222 hg.repository(ui, dest, create=True)
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223
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224 destc = converter(ui, dest)
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225 if not hasattr(destc, "putcommit"):
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226 raise util.Abort("%s: can't write to this repo type" % src)
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227
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228 if not mapfile:
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229 try:
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230 mapfile = destc.mapfile()
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231 except:
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232 mapfile = os.path.join(destc, "map")
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233
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234 c = convert(ui, srcc, destc, mapfile, opts)
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235 c.convert()
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236
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237 cmdtable = {
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238 "convert":
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239 (_convert,
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240 [('', 'datesort', None, 'try to sort changesets by date')],
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241 'hg convert [OPTION]... SOURCE [DEST [MAPFILE]]'),
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242 }