Mercurial > hg > mercurial-crew-with-dirclash
annotate hgext/convert/__init__.py @ 4588:9855939d0c82
convert extension: Save a few opens on the map file
Save a few opens on the map file adding a class attribute
author | Edouard Gomez <ed.gomez@free.fr> |
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date | Thu, 14 Jun 2007 23:25:55 +0200 |
parents | cc9b79216a76 |
children | 451e91ed535e |
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> |
316 | 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. |
316 | 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 |
316 | 33 self.source = source |
34 self.dest = dest | |
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35 self.ui = ui |
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36 self.opts = opts |
316 | 37 self.commitcache = {} |
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38 self.mapfile = mapfile |
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39 self.mapfilefd = None |
316 | 40 |
41 self.map = {} | |
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42 try: |
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43 origmapfile = open(self.mapfile, 'r') |
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44 for l in origmapfile: |
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45 sv, dv = l[:-1].split() |
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46 self.map[sv] = dv |
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47 origmapfile.close() |
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48 except IOError: |
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49 pass |
316 | 50 |
51 def walktree(self, heads): | |
52 visit = heads | |
53 known = {} | |
54 parents = {} | |
55 while visit: | |
56 n = visit.pop(0) | |
57 if n in known or n in self.map: continue | |
58 known[n] = 1 | |
59 self.commitcache[n] = self.source.getcommit(n) | |
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60 cp = self.commitcache[n].parents |
316 | 61 for p in cp: |
62 parents.setdefault(n, []).append(p) | |
63 visit.append(p) | |
64 | |
65 return parents | |
66 | |
67 def toposort(self, parents): | |
68 visit = parents.keys() | |
69 seen = {} | |
70 children = {} | |
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71 |
316 | 72 while visit: |
73 n = visit.pop(0) | |
74 if n in seen: continue | |
75 seen[n] = 1 | |
76 pc = 0 | |
77 if n in parents: | |
78 for p in parents[n]: | |
79 if p not in self.map: pc += 1 | |
80 visit.append(p) | |
81 children.setdefault(p, []).append(n) | |
82 if not pc: root = n | |
83 | |
84 s = [] | |
85 removed = {} | |
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86 visit = children.keys() |
316 | 87 while visit: |
88 n = visit.pop(0) | |
89 if n in removed: continue | |
90 dep = 0 | |
91 if n in parents: | |
92 for p in parents[n]: | |
93 if p in self.map: continue | |
94 if p not in removed: | |
95 # we're still dependent | |
96 visit.append(n) | |
97 dep = 1 | |
98 break | |
99 | |
100 if not dep: | |
101 # all n's parents are in the list | |
102 removed[n] = 1 | |
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103 if n not in self.map: |
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104 s.append(n) |
316 | 105 if n in children: |
106 for c in children[n]: | |
107 visit.insert(0, c) | |
108 | |
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109 if self.opts.get('datesort'): |
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110 depth = {} |
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111 for n in s: |
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112 depth[n] = 0 |
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113 pl = [p for p in self.commitcache[n].parents |
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114 if p not in self.map] |
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115 if pl: |
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116 depth[n] = max([depth[p] for p in pl]) + 1 |
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117 |
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118 s = [(depth[n], self.commitcache[n].date, n) for n in s] |
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119 s.sort() |
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120 s = [e[2] for e in s] |
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121 |
316 | 122 return s |
123 | |
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124 def mapentry(self, src, dst): |
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125 if self.mapfilefd is None: |
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126 try: |
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127 self.mapfilefd = open(self.mapfile, "a") |
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128 except IOError, (errno, strerror): |
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129 raise util.Abort("Could not open map file %s: %s, %s\n" % (self.mapfile, errno, strerror)) |
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130 self.map[src] = dst |
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131 self.mapfilefd.write("%s %s\n" % (src, dst)) |
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132 self.mapfilefd.flush() |
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133 |
316 | 134 def copy(self, rev): |
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135 c = self.commitcache[rev] |
316 | 136 files = self.source.getchanges(rev) |
137 | |
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138 for f, v in files: |
316 | 139 try: |
140 data = self.source.getfile(f, v) | |
141 except IOError, inst: | |
142 self.dest.delfile(f) | |
143 else: | |
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144 e = self.source.getmode(f, v) |
316 | 145 self.dest.putfile(f, e, data) |
146 | |
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147 r = [self.map[v] for v in c.parents] |
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148 f = [f for f, v in files] |
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149 newnode = self.dest.putcommit(f, r, c) |
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150 self.mapentry(rev, newnode) |
316 | 151 |
152 def convert(self): | |
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153 try: |
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154 self.ui.status("scanning source...\n") |
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155 heads = self.source.getheads() |
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156 parents = self.walktree(heads) |
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157 self.ui.status("sorting...\n") |
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158 t = self.toposort(parents) |
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159 num = len(t) |
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160 c = None |
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161 |
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162 self.ui.status("converting...\n") |
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163 for c in t: |
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164 num -= 1 |
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165 desc = self.commitcache[c].desc |
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166 if "\n" in desc: |
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167 desc = desc.splitlines()[0] |
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168 self.ui.status("%d %s\n" % (num, desc)) |
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169 self.copy(c) |
316 | 170 |
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171 tags = self.source.gettags() |
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172 ctags = {} |
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173 for k in tags: |
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174 v = tags[k] |
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175 if v in self.map: |
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176 ctags[k] = self.map[v] |
316 | 177 |
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178 if c and ctags: |
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179 nrev = self.dest.puttags(ctags) |
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180 # write another hash correspondence to override the previous |
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181 # one so we don't end up with extra tag heads |
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182 if nrev: |
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183 self.mapentry(c, nrev) |
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184 finally: |
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185 self.cleanup() |
694 | 186 |
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187 def cleanup(self): |
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188 if self.mapfilefd: |
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189 self.mapfilefd.close() |
694 | 190 |
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191 def _convert(ui, src, dest=None, mapfile=None, **opts): |
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192 '''Convert a foreign SCM repository to a Mercurial one. |
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193 |
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194 Accepted source formats: |
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195 - GIT |
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196 - CVS |
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197 |
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198 Accepted destination formats: |
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199 - Mercurial |
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200 |
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201 If destination isn't given, a new Mercurial repo named <src>-hg will |
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202 be created. If <mapfile> isn't given, it will be put in a default |
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203 location (<dest>/.hg/shamap by default) |
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204 |
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205 The <mapfile> is a simple text file that maps each source commit ID to |
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206 the destination ID for that revision, like so: |
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207 |
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208 <source ID> <destination ID> |
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209 |
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210 If the file doesn't exist, it's automatically created. It's updated |
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211 on each commit copied, so convert-repo can be interrupted and can |
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212 be run repeatedly to copy new commits. |
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213 ''' |
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214 |
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215 srcc = converter(ui, src) |
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216 if not hasattr(srcc, "getcommit"): |
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217 raise util.Abort("%s: can't read from this repo type" % src) |
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218 |
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219 if not dest: |
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220 dest = src + "-hg" |
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221 ui.status("assuming destination %s\n" % dest) |
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222 |
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223 # Try to be smart and initalize things when required |
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224 if os.path.isdir(dest): |
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225 if len(os.listdir(dest)) > 0: |
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226 try: |
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227 hg.repository(ui, dest) |
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228 ui.status("destination %s is a Mercurial repository\n" % dest) |
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229 except hg.RepoError: |
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230 raise util.Abort( |
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231 "destination directory %s is not empty.\n" |
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232 "Please specify an empty directory to be initialized\n" |
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233 "or an already initialized mercurial repository" |
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234 % dest) |
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235 else: |
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236 ui.status("initializing destination %s repository\n" % dest) |
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237 hg.repository(ui, dest, create=True) |
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238 elif os.path.exists(dest): |
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239 raise util.Abort("destination %s exists and is not a directory" % dest) |
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240 else: |
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241 ui.status("initializing destination %s repository\n" % dest) |
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242 hg.repository(ui, dest, create=True) |
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243 |
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244 destc = converter(ui, dest) |
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245 if not hasattr(destc, "putcommit"): |
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246 raise util.Abort("%s: can't write to this repo type" % src) |
316 | 247 |
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248 if not mapfile: |
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249 try: |
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250 mapfile = destc.mapfile() |
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251 except: |
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252 mapfile = os.path.join(destc, "map") |
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253 |
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254 c = convert(ui, srcc, destc, mapfile, opts) |
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255 c.convert() |
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256 |
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257 cmdtable = { |
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258 "convert": |
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259 (_convert, |
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260 [('', 'datesort', None, 'try to sort changesets by date')], |
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261 'hg convert [OPTION]... SOURCE [DEST [MAPFILE]]'), |
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262 } |