Mercurial > hg > mercurial-crew-with-dirclash
annotate contrib/convert-repo @ 3948:b58c1681d23b
Update convert-repo usage comments
author | Matt Mackall <mpm@selenic.com> |
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date | Wed, 20 Dec 2006 17:04:07 -0600 |
parents | 0fab73b3f453 |
children | fad134931327 |
rev | line source |
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316 | 1 #!/usr/bin/env python |
2 # | |
3 # This is a generalized framework for converting between SCM | |
4 # repository formats. | |
5 # | |
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6 # To use, run: |
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7 # |
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8 # convert-repo <source> [<dest> [<mapfile>]] |
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9 # |
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10 # Currently accepted source formats: git |
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11 # Currently accepted destination formats: hg |
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12 # |
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13 # If destination isn't given, a new Mercurial repo named <src>-hg will |
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14 # be created. If <mapfile> isn't given, it will be put in a default |
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15 # location (<dest>/.hg/shamap by default) |
316 | 16 # |
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17 # The <mapfile> is a simple text file that maps each source commit ID to |
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18 # the destination ID for that revision, like so: |
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19 # |
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20 # <source ID> <destination ID> |
316 | 21 # |
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22 # If the file doesn't exist, it's automatically created. It's updated |
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23 # on each commit copied, so convert-repo can be interrupted and can |
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24 # be run repeatedly to copy new commits. |
316 | 25 |
694 | 26 import sys, os, zlib, sha, time |
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27 os.environ["HGENCODING"] = "utf-8" |
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28 from mercurial import hg, ui, util, fancyopts |
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29 |
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30 class Abort(Exception): pass |
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31 |
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32 quiet = 0 |
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33 def status(msg): |
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34 if not quiet: sys.stdout.write(str(msg)) |
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35 |
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36 def warn(msg): |
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37 sys.stderr.write(str(msg)) |
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38 |
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39 def abort(msg): |
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40 raise Abort(msg) |
316 | 41 |
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42 def recode(s): |
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43 try: |
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44 return s.decode("utf-8").encode("utf-8") |
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45 except: |
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46 try: |
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47 return s.decode("latin-1").encode("utf-8") |
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48 except: |
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49 return s.decode("utf-8", "replace").encode("utf-8") |
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50 |
316 | 51 class convert_git: |
52 def __init__(self, path): | |
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53 if os.path.isdir(path + "/.git"): |
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54 path += "/.git" |
316 | 55 self.path = path |
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56 if not os.path.exists(path + "/HEAD"): |
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57 raise TypeError("couldn't open GIT repo %s" % path) |
316 | 58 |
59 def getheads(self): | |
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60 fh = os.popen("GIT_DIR=%s git-rev-parse --verify HEAD" % self.path) |
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61 return [fh.read()[:-1]] |
316 | 62 |
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63 def catfile(self, rev, type): |
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64 if rev == "0" * 40: raise IOError() |
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65 fh = os.popen("GIT_DIR=%s git-cat-file %s %s 2>/dev/null" % (self.path, type, rev)) |
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66 return fh.read() |
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67 |
316 | 68 def getfile(self, name, rev): |
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69 return self.catfile(rev, "blob") |
316 | 70 |
71 def getchanges(self, version): | |
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72 fh = os.popen("GIT_DIR=%s git-diff-tree --root -m -r %s" % (self.path, version)) |
316 | 73 changes = [] |
74 for l in fh: | |
75 if "\t" not in l: continue | |
76 m, f = l[:-1].split("\t") | |
77 m = m.split() | |
78 h = m[3] | |
79 p = (m[1] == "100755") | |
80 changes.append((f, h, p)) | |
81 return changes | |
82 | |
83 def getcommit(self, version): | |
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84 c = self.catfile(version, "commit") # read the commit hash |
316 | 85 end = c.find("\n\n") |
86 message = c[end+2:] | |
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87 message = recode(message) |
316 | 88 l = c[:end].splitlines() |
89 manifest = l[0].split()[1] | |
90 parents = [] | |
91 for e in l[1:]: | |
92 n,v = e.split(" ", 1) | |
93 if n == "author": | |
94 p = v.split() | |
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95 tm, tz = p[-2:] |
316 | 96 author = " ".join(p[:-2]) |
97 if author[0] == "<": author = author[1:-1] | |
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98 author = recode(author) |
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99 if n == "committer": |
431 | 100 p = v.split() |
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101 tm, tz = p[-2:] |
431 | 102 committer = " ".join(p[:-2]) |
103 if committer[0] == "<": committer = committer[1:-1] | |
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104 committer = recode(committer) |
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105 message += "\ncommitter: %s\n" % committer |
316 | 106 if n == "parent": parents.append(v) |
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107 |
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108 tzs, tzh, tzm = tz[-5:-4] + "1", tz[-4:-2], tz[-2:] |
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109 tz = -int(tzs) * (int(tzh) * 3600 + int(tzm)) |
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110 date = tm + " " + str(tz) |
316 | 111 return (parents, author, date, message) |
112 | |
694 | 113 def gettags(self): |
114 tags = {} | |
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115 for f in os.listdir(self.path + "/refs/tags"): |
694 | 116 try: |
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117 h = file(self.path + "/refs/tags/" + f).read().strip() |
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118 c = self.catfile(h, "tag") # read the commit hash |
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119 h = c.splitlines()[0].split()[1] |
1237 | 120 tags[f] = h |
694 | 121 except: |
122 pass | |
123 return tags | |
124 | |
316 | 125 class convert_mercurial: |
126 def __init__(self, path): | |
127 self.path = path | |
128 u = ui.ui() | |
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129 try: |
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130 self.repo = hg.repository(u, path) |
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131 except: |
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132 raise TypeError("could open hg repo %s" % path) |
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133 |
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134 def mapfile(self): |
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135 return os.path.join(self.path, ".hg", "shamap") |
316 | 136 |
137 def getheads(self): | |
138 h = self.repo.changelog.heads() | |
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139 return [ hg.hex(x) for x in h ] |
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140 |
316 | 141 def putfile(self, f, e, data): |
142 self.repo.wfile(f, "w").write(data) | |
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143 if self.repo.dirstate.state(f) == '?': |
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144 self.repo.dirstate.update([f], "a") |
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145 |
450 | 146 util.set_exec(self.repo.wjoin(f), e) |
316 | 147 |
148 def delfile(self, f): | |
149 try: | |
150 os.unlink(self.repo.wjoin(f)) | |
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151 #self.repo.remove([f]) |
316 | 152 except: |
153 pass | |
154 | |
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155 def putcommit(self, files, parents, author, dest, text): |
431 | 156 seen = {} |
157 pl = [] | |
158 for p in parents: | |
159 if p not in seen: | |
160 pl.append(p) | |
161 seen[p] = 1 | |
162 parents = pl | |
316 | 163 |
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164 if len(parents) < 2: parents.append("0" * 40) |
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165 if len(parents) < 2: parents.append("0" * 40) |
431 | 166 p2 = parents.pop(0) |
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167 |
431 | 168 while parents: |
169 p1 = p2 | |
170 p2 = parents.pop(0) | |
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171 self.repo.rawcommit(files, text, author, dest, |
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172 hg.bin(p1), hg.bin(p2)) |
431 | 173 text = "(octopus merge fixup)\n" |
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174 p2 = hg.hex(self.repo.changelog.tip()) |
431 | 175 |
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176 return p2 |
316 | 177 |
694 | 178 def puttags(self, tags): |
179 try: | |
180 old = self.repo.wfile(".hgtags").read() | |
181 oldlines = old.splitlines(1) | |
182 oldlines.sort() | |
183 except: | |
184 oldlines = [] | |
185 | |
186 k = tags.keys() | |
187 k.sort() | |
188 newlines = [] | |
189 for tag in k: | |
190 newlines.append("%s %s\n" % (tags[tag], tag)) | |
191 | |
192 newlines.sort() | |
193 | |
194 if newlines != oldlines: | |
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195 status("updating tags\n") |
694 | 196 f = self.repo.wfile(".hgtags", "w") |
197 f.write("".join(newlines)) | |
198 f.close() | |
199 if not oldlines: self.repo.add([".hgtags"]) | |
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200 date = "%s 0" % int(time.mktime(time.gmtime())) |
694 | 201 self.repo.rawcommit([".hgtags"], "update tags", "convert-repo", |
202 date, self.repo.changelog.tip(), hg.nullid) | |
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203 return hg.hex(self.repo.changelog.tip()) |
694 | 204 |
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205 converters = [convert_git, convert_mercurial] |
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206 |
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207 def converter(path): |
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208 if not os.path.isdir(path): |
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209 abort("%s: not a directory\n" % path) |
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210 for c in converters: |
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211 try: |
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212 return c(path) |
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213 except TypeError: |
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214 pass |
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215 abort("%s: unknown repository type\n" % path) |
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216 |
316 | 217 class convert: |
218 def __init__(self, source, dest, mapfile): | |
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219 |
316 | 220 self.source = source |
221 self.dest = dest | |
222 self.mapfile = mapfile | |
223 self.commitcache = {} | |
224 | |
225 self.map = {} | |
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226 try: |
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227 for l in file(self.mapfile): |
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228 sv, dv = l[:-1].split() |
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229 self.map[sv] = dv |
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230 except IOError: |
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231 pass |
316 | 232 |
233 def walktree(self, heads): | |
234 visit = heads | |
235 known = {} | |
236 parents = {} | |
237 while visit: | |
238 n = visit.pop(0) | |
239 if n in known or n in self.map: continue | |
240 known[n] = 1 | |
241 self.commitcache[n] = self.source.getcommit(n) | |
242 cp = self.commitcache[n][0] | |
243 for p in cp: | |
244 parents.setdefault(n, []).append(p) | |
245 visit.append(p) | |
246 | |
247 return parents | |
248 | |
249 def toposort(self, parents): | |
250 visit = parents.keys() | |
251 seen = {} | |
252 children = {} | |
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253 |
316 | 254 while visit: |
255 n = visit.pop(0) | |
256 if n in seen: continue | |
257 seen[n] = 1 | |
258 pc = 0 | |
259 if n in parents: | |
260 for p in parents[n]: | |
261 if p not in self.map: pc += 1 | |
262 visit.append(p) | |
263 children.setdefault(p, []).append(n) | |
264 if not pc: root = n | |
265 | |
266 s = [] | |
267 removed = {} | |
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268 visit = children.keys() |
316 | 269 while visit: |
270 n = visit.pop(0) | |
271 if n in removed: continue | |
272 dep = 0 | |
273 if n in parents: | |
274 for p in parents[n]: | |
275 if p in self.map: continue | |
276 if p not in removed: | |
277 # we're still dependent | |
278 visit.append(n) | |
279 dep = 1 | |
280 break | |
281 | |
282 if not dep: | |
283 # all n's parents are in the list | |
284 removed[n] = 1 | |
285 s.append(n) | |
286 if n in children: | |
287 for c in children[n]: | |
288 visit.insert(0, c) | |
289 | |
290 return s | |
291 | |
292 def copy(self, rev): | |
293 p, a, d, t = self.commitcache[rev] | |
294 files = self.source.getchanges(rev) | |
295 | |
296 for f,v,e in files: | |
297 try: | |
298 data = self.source.getfile(f, v) | |
299 except IOError, inst: | |
300 self.dest.delfile(f) | |
301 else: | |
302 self.dest.putfile(f, e, data) | |
303 | |
304 r = [self.map[v] for v in p] | |
305 f = [f for f,v,e in files] | |
306 self.map[rev] = self.dest.putcommit(f, r, a, d, t) | |
307 file(self.mapfile, "a").write("%s %s\n" % (rev, self.map[rev])) | |
308 | |
309 def convert(self): | |
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310 status("scanning source...\n") |
316 | 311 heads = self.source.getheads() |
312 parents = self.walktree(heads) | |
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313 status("sorting...\n") |
316 | 314 t = self.toposort(parents) |
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315 t = [n for n in t if n not in self.map] |
316 | 316 num = len(t) |
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317 c = None |
316 | 318 |
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319 status("converting...\n") |
316 | 320 for c in t: |
321 num -= 1 | |
322 desc = self.commitcache[c][3].splitlines()[0] | |
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323 status("%d %s\n" % (num, desc)) |
316 | 324 self.copy(c) |
325 | |
694 | 326 tags = self.source.gettags() |
327 ctags = {} | |
328 for k in tags: | |
329 v = tags[k] | |
330 if v in self.map: | |
331 ctags[k] = self.map[v] | |
332 | |
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333 if c and ctags: |
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334 nrev = self.dest.puttags(ctags) |
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335 # write another hash correspondence to override the previous |
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336 # one so we don't end up with extra tag heads |
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337 if nrev: |
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338 file(self.mapfile, "a").write("%s %s\n" % (c, nrev)) |
694 | 339 |
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340 def command(src, dest=None, mapfile=None, **opts): |
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341 srcc = converter(src) |
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342 if not hasattr(srcc, "getcommit"): |
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343 abort("%s: can't read from this repo type\n" % src) |
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344 |
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345 if not dest: |
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346 dest = src + "-hg" |
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347 status("assuming destination %s\n" % dest) |
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348 if not os.path.isdir(dest): |
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349 status("creating repository %s\n" % dest) |
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350 os.system("hg init " + dest) |
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351 destc = converter(dest) |
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352 if not hasattr(destc, "putcommit"): |
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353 abort("%s: can't write to this repo type\n" % src) |
316 | 354 |
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355 if not mapfile: |
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356 try: |
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357 mapfile = destc.mapfile() |
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358 except: |
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359 mapfile = os.path.join(destc, "map") |
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360 |
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361 c = convert(srcc, destc, mapfile) |
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362 c.convert() |
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363 |
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364 options = [('q', 'quiet', None, 'suppress output')] |
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365 opts = {} |
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366 args = fancyopts.fancyopts(sys.argv[1:], options, opts) |
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367 |
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368 if opts['quiet']: |
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369 quiet = 1 |
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370 |
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371 try: |
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372 command(*args, **opts) |
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373 except Abort, inst: |
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374 warn(inst) |
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375 except KeyboardInterrupt: |
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376 status("interrupted\n") |