Mercurial > hg
annotate hgext/convert/__init__.py @ 4761:7c8cd400e86a
convert: initialize source after destination, cleaning up if source is unusable
author | Brendan Cully <brendan@kublai.com> |
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date | Sun, 01 Jul 2007 19:23:10 -0700 |
parents | 07efcce17d28 |
children | 8e9d3faec270 |
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1 # convert.py Foreign SCM converter |
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2 # |
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3 # Copyright 2005-2007 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, shutil |
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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, rev=None): |
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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 if rev: |
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26 return c(ui, path, rev=rev) |
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27 else: |
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28 return c(ui, path) |
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29 except NoRepo: |
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30 pass |
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31 raise util.Abort("%s: unknown repository type" % path) |
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32 |
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33 class convert(object): |
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34 def __init__(self, ui, source, dest, mapfile, opts): |
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35 |
316 | 36 self.source = source |
37 self.dest = dest | |
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38 self.ui = ui |
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39 self.opts = opts |
316 | 40 self.commitcache = {} |
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41 self.mapfile = mapfile |
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42 self.mapfilefd = None |
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43 self.authors = {} |
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44 self.authorfile = None |
316 | 45 |
46 self.map = {} | |
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47 try: |
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48 origmapfile = open(self.mapfile, 'r') |
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49 for l in origmapfile: |
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50 sv, dv = l[:-1].split() |
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51 self.map[sv] = dv |
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52 origmapfile.close() |
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53 except IOError: |
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54 pass |
316 | 55 |
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56 # Read first the dst author map if any |
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57 authorfile = self.dest.authorfile() |
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58 if authorfile and os.path.exists(authorfile): |
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59 self.readauthormap(authorfile) |
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60 # Extend/Override with new author map if necessary |
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61 if opts.get('authors'): |
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62 self.readauthormap(opts.get('authors')) |
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63 self.authorfile = self.dest.authorfile() |
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64 |
316 | 65 def walktree(self, heads): |
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66 '''Return a mapping that identifies the uncommitted parents of every |
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67 uncommitted changeset.''' |
316 | 68 visit = heads |
69 known = {} | |
70 parents = {} | |
71 while visit: | |
72 n = visit.pop(0) | |
73 if n in known or n in self.map: continue | |
74 known[n] = 1 | |
75 self.commitcache[n] = self.source.getcommit(n) | |
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76 cp = self.commitcache[n].parents |
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77 parents[n] = [] |
316 | 78 for p in cp: |
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79 parents[n].append(p) |
316 | 80 visit.append(p) |
81 | |
82 return parents | |
83 | |
84 def toposort(self, parents): | |
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85 '''Return an ordering such that every uncommitted changeset is |
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86 preceeded by all its uncommitted ancestors.''' |
316 | 87 visit = parents.keys() |
88 seen = {} | |
89 children = {} | |
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90 |
316 | 91 while visit: |
92 n = visit.pop(0) | |
93 if n in seen: continue | |
94 seen[n] = 1 | |
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95 # Ensure that nodes without parents are present in the 'children' |
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96 # mapping. |
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97 children.setdefault(n, []) |
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98 for p in parents[n]: |
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99 if not p in self.map: |
316 | 100 visit.append(p) |
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101 children.setdefault(p, []).append(n) |
316 | 102 |
103 s = [] | |
104 removed = {} | |
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105 visit = children.keys() |
316 | 106 while visit: |
107 n = visit.pop(0) | |
108 if n in removed: continue | |
109 dep = 0 | |
110 if n in parents: | |
111 for p in parents[n]: | |
112 if p in self.map: continue | |
113 if p not in removed: | |
114 # we're still dependent | |
115 visit.append(n) | |
116 dep = 1 | |
117 break | |
118 | |
119 if not dep: | |
120 # all n's parents are in the list | |
121 removed[n] = 1 | |
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122 if n not in self.map: |
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123 s.append(n) |
316 | 124 if n in children: |
125 for c in children[n]: | |
126 visit.insert(0, c) | |
127 | |
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128 if self.opts.get('datesort'): |
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129 depth = {} |
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130 for n in s: |
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131 depth[n] = 0 |
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132 pl = [p for p in self.commitcache[n].parents |
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133 if p not in self.map] |
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134 if pl: |
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135 depth[n] = max([depth[p] for p in pl]) + 1 |
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136 |
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137 s = [(depth[n], self.commitcache[n].date, n) for n in s] |
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138 s.sort() |
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139 s = [e[2] for e in s] |
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140 |
316 | 141 return s |
142 | |
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143 def mapentry(self, src, dst): |
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144 if self.mapfilefd is None: |
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145 try: |
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146 self.mapfilefd = open(self.mapfile, "a") |
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147 except IOError, (errno, strerror): |
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148 raise util.Abort("Could not open map file %s: %s, %s\n" % (self.mapfile, errno, strerror)) |
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149 self.map[src] = dst |
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150 self.mapfilefd.write("%s %s\n" % (src, dst)) |
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151 self.mapfilefd.flush() |
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152 |
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153 def writeauthormap(self): |
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154 authorfile = self.authorfile |
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155 if authorfile: |
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156 self.ui.status('Writing author map file %s\n' % authorfile) |
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157 ofile = open(authorfile, 'w+') |
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158 for author in self.authors: |
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159 ofile.write("%s=%s\n" % (author, self.authors[author])) |
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160 ofile.close() |
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161 |
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162 def readauthormap(self, authorfile): |
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163 afile = open(authorfile, 'r') |
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164 for line in afile: |
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165 try: |
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166 srcauthor = line.split('=')[0].strip() |
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167 dstauthor = line.split('=')[1].strip() |
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168 if srcauthor in self.authors and dstauthor != self.authors[srcauthor]: |
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169 self.ui.status( |
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170 'Overriding mapping for author %s, was %s, will be %s\n' |
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171 % (srcauthor, self.authors[srcauthor], dstauthor)) |
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172 else: |
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173 self.ui.debug('Mapping author %s to %s\n' |
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174 % (srcauthor, dstauthor)) |
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175 self.authors[srcauthor] = dstauthor |
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176 except IndexError: |
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177 self.ui.warn( |
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178 'Ignoring bad line in author file map %s: %s\n' |
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179 % (authorfile, line)) |
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180 afile.close() |
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181 |
316 | 182 def copy(self, rev): |
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183 c = self.commitcache[rev] |
316 | 184 files = self.source.getchanges(rev) |
185 | |
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186 for f, v in files: |
316 | 187 try: |
188 data = self.source.getfile(f, v) | |
189 except IOError, inst: | |
190 self.dest.delfile(f) | |
191 else: | |
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192 e = self.source.getmode(f, v) |
316 | 193 self.dest.putfile(f, e, data) |
194 | |
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195 r = [self.map[v] for v in c.parents] |
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196 f = [f for f, v in files] |
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197 newnode = self.dest.putcommit(f, r, c) |
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198 self.mapentry(rev, newnode) |
316 | 199 |
200 def convert(self): | |
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201 try: |
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202 self.ui.status("scanning source...\n") |
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203 heads = self.source.getheads() |
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204 parents = self.walktree(heads) |
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205 self.ui.status("sorting...\n") |
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206 t = self.toposort(parents) |
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207 num = len(t) |
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208 c = None |
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209 |
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210 self.ui.status("converting...\n") |
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211 for c in t: |
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212 num -= 1 |
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213 desc = self.commitcache[c].desc |
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214 if "\n" in desc: |
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215 desc = desc.splitlines()[0] |
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216 author = self.commitcache[c].author |
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217 author = self.authors.get(author, author) |
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218 self.commitcache[c].author = author |
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219 self.ui.status("%d %s\n" % (num, desc)) |
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220 self.copy(c) |
316 | 221 |
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222 tags = self.source.gettags() |
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223 ctags = {} |
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224 for k in tags: |
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225 v = tags[k] |
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226 if v in self.map: |
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227 ctags[k] = self.map[v] |
316 | 228 |
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229 if c and ctags: |
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230 nrev = self.dest.puttags(ctags) |
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231 # write another hash correspondence to override the previous |
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232 # one so we don't end up with extra tag heads |
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233 if nrev: |
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234 self.mapentry(c, nrev) |
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235 |
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236 self.writeauthormap() |
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237 finally: |
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238 self.cleanup() |
694 | 239 |
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240 def cleanup(self): |
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241 if self.mapfilefd: |
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242 self.mapfilefd.close() |
694 | 243 |
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244 def _convert(ui, src, dest=None, mapfile=None, **opts): |
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245 '''Convert a foreign SCM repository to a Mercurial one. |
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246 |
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247 Accepted source formats: |
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248 - GIT |
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249 - CVS |
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250 |
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251 Accepted destination formats: |
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252 - Mercurial |
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253 |
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254 If no revision is given, all revisions will be converted. Otherwise, |
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255 convert will only import up to the named revision (given in a format |
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256 understood by the source). |
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257 |
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258 If destination isn't given, a new Mercurial repo named <src>-hg will |
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259 be created. If <mapfile> isn't given, it will be put in a default |
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260 location (<dest>/.hg/shamap by default) |
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261 |
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262 The <mapfile> is a simple text file that maps each source commit ID to |
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263 the destination ID for that revision, like so: |
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264 <source ID> <destination ID> |
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265 |
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266 If the file doesn't exist, it's automatically created. It's updated |
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267 on each commit copied, so convert-repo can be interrupted and can |
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268 be run repeatedly to copy new commits. |
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269 |
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270 The [username mapping] file is a simple text file that maps each source |
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271 commit author to a destination commit author. It is handy for source SCMs |
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272 that use unix logins to identify authors (eg: CVS). One line per author |
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273 mapping and the line format is: |
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274 srcauthor=whatever string you want |
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275 ''' |
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276 |
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277 if not dest: |
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278 dest = src + "-hg" |
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279 ui.status("assuming destination %s\n" % dest) |
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280 |
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281 # Try to be smart and initalize things when required |
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282 created = False |
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283 if os.path.isdir(dest): |
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284 if len(os.listdir(dest)) > 0: |
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285 try: |
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286 hg.repository(ui, dest) |
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287 ui.status("destination %s is a Mercurial repository\n" % dest) |
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288 except hg.RepoError: |
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289 raise util.Abort( |
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290 "destination directory %s is not empty.\n" |
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291 "Please specify an empty directory to be initialized\n" |
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292 "or an already initialized mercurial repository" |
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293 % dest) |
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294 else: |
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295 ui.status("initializing destination %s repository\n" % dest) |
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296 hg.repository(ui, dest, create=True) |
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297 created = True |
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298 elif os.path.exists(dest): |
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299 raise util.Abort("destination %s exists and is not a directory" % dest) |
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300 else: |
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301 ui.status("initializing destination %s repository\n" % dest) |
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302 hg.repository(ui, dest, create=True) |
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303 created = True |
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304 |
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305 destc = converter(ui, dest) |
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306 if not hasattr(destc, "putcommit"): |
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307 raise util.Abort("%s: can't write to this repo type" % src) |
316 | 308 |
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309 try: |
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310 srcc = converter(ui, src, rev=opts.get('rev')) |
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311 if not hasattr(srcc, "getcommit"): |
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312 raise util.Abort("%s: can't read from this repo type" % src) |
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313 except Exception: |
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314 if created: |
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315 shutil.rmtree(dest, True) |
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316 raise |
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317 |
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318 if not mapfile: |
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319 try: |
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320 mapfile = destc.mapfile() |
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321 except: |
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322 mapfile = os.path.join(destc, "map") |
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323 |
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324 c = convert(ui, srcc, destc, mapfile, opts) |
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325 c.convert() |
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326 |
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327 cmdtable = { |
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328 "convert": |
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329 (_convert, |
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330 [('A', 'authors', '', 'username mapping filename'), |
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331 ('r', 'rev', '', 'import up to target revision REV'), |
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332 ('', 'datesort', None, 'try to sort changesets by date')], |
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333 'hg convert [OPTION]... SOURCE [DEST [MAPFILE]]'), |
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334 } |