Mercurial > hg
annotate hgext/convert/__init__.py @ 4536:cc9b79216a76
Split convert extension into common and repository type modules
author | Brendan Cully <brendan@kublai.com> |
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date | Sun, 10 Jun 2007 20:08:47 -0700 |
parents | c3a78a49d7f0 |
children | 9855939d0c82 |
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 |
316 | 36 self.mapfile = mapfile |
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37 self.opts = opts |
316 | 38 self.commitcache = {} |
39 | |
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 |
316 | 47 |
48 def walktree(self, heads): | |
49 visit = heads | |
50 known = {} | |
51 parents = {} | |
52 while visit: | |
53 n = visit.pop(0) | |
54 if n in known or n in self.map: continue | |
55 known[n] = 1 | |
56 self.commitcache[n] = self.source.getcommit(n) | |
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57 cp = self.commitcache[n].parents |
316 | 58 for p in cp: |
59 parents.setdefault(n, []).append(p) | |
60 visit.append(p) | |
61 | |
62 return parents | |
63 | |
64 def toposort(self, parents): | |
65 visit = parents.keys() | |
66 seen = {} | |
67 children = {} | |
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68 |
316 | 69 while visit: |
70 n = visit.pop(0) | |
71 if n in seen: continue | |
72 seen[n] = 1 | |
73 pc = 0 | |
74 if n in parents: | |
75 for p in parents[n]: | |
76 if p not in self.map: pc += 1 | |
77 visit.append(p) | |
78 children.setdefault(p, []).append(n) | |
79 if not pc: root = n | |
80 | |
81 s = [] | |
82 removed = {} | |
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83 visit = children.keys() |
316 | 84 while visit: |
85 n = visit.pop(0) | |
86 if n in removed: continue | |
87 dep = 0 | |
88 if n in parents: | |
89 for p in parents[n]: | |
90 if p in self.map: continue | |
91 if p not in removed: | |
92 # we're still dependent | |
93 visit.append(n) | |
94 dep = 1 | |
95 break | |
96 | |
97 if not dep: | |
98 # all n's parents are in the list | |
99 removed[n] = 1 | |
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100 if n not in self.map: |
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101 s.append(n) |
316 | 102 if n in children: |
103 for c in children[n]: | |
104 visit.insert(0, c) | |
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 |
316 | 119 return s |
120 | |
121 def copy(self, rev): | |
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122 c = self.commitcache[rev] |
316 | 123 files = self.source.getchanges(rev) |
124 | |
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125 for f, v in files: |
316 | 126 try: |
127 data = self.source.getfile(f, v) | |
128 except IOError, inst: | |
129 self.dest.delfile(f) | |
130 else: | |
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131 e = self.source.getmode(f, v) |
316 | 132 self.dest.putfile(f, e, data) |
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) |
316 | 137 file(self.mapfile, "a").write("%s %s\n" % (rev, self.map[rev])) |
138 | |
139 def convert(self): | |
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140 self.ui.status("scanning source...\n") |
316 | 141 heads = self.source.getheads() |
142 parents = self.walktree(heads) | |
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143 self.ui.status("sorting...\n") |
316 | 144 t = self.toposort(parents) |
145 num = len(t) | |
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146 c = None |
316 | 147 |
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148 self.ui.status("converting...\n") |
316 | 149 for c in t: |
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)) |
316 | 155 self.copy(c) |
156 | |
694 | 157 tags = self.source.gettags() |
158 ctags = {} | |
159 for k in tags: | |
160 v = tags[k] | |
161 if v in self.map: | |
162 ctags[k] = self.map[v] | |
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)) |
694 | 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) |
316 | 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 } |