Mercurial > hg
annotate hgext/convert/__init__.py @ 5012:be25decfdb13
convert: make commit constructor clearer and less magical
author | Bryan O'Sullivan <bos@serpentine.com> |
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date | Thu, 26 Jul 2007 13:34:36 -0700 |
parents | 89fbb0a5e8e3 |
children | 6c1029aacc9a |
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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, converter_source, converter_sink |
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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 from subversion import convert_svn |
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13 |
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14 import os, shutil |
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15 from mercurial import hg, ui, util, commands |
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16 |
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17 commands.norepo += " convert" |
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18 |
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19 converters = [convert_cvs, convert_git, convert_svn, convert_mercurial] |
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20 |
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21 def convertsource(ui, path, **opts): |
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22 for c in converters: |
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23 if not hasattr(c, 'getcommit'): |
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24 continue |
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25 try: |
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26 return c(ui, path, **opts) |
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27 except NoRepo: |
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28 pass |
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29 raise util.Abort('%s: unknown repository type' % path) |
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30 |
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31 def convertsink(ui, path): |
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32 if not os.path.isdir(path): |
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33 raise util.Abort("%s: not a directory" % path) |
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34 for c in converters: |
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35 if not hasattr(c, 'putcommit'): |
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36 continue |
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37 try: |
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38 return c(ui, path) |
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39 except NoRepo: |
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40 pass |
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41 raise util.Abort('%s: unknown repository type' % path) |
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42 |
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43 class convert(object): |
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44 def __init__(self, ui, source, dest, revmapfile, opts): |
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45 |
316 | 46 self.source = source |
47 self.dest = dest | |
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48 self.ui = ui |
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49 self.opts = opts |
316 | 50 self.commitcache = {} |
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51 self.revmapfile = revmapfile |
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52 self.revmapfilefd = None |
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53 self.authors = {} |
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54 self.authorfile = None |
316 | 55 |
56 self.map = {} | |
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57 try: |
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58 origrevmapfile = open(self.revmapfile, 'r') |
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59 for l in origrevmapfile: |
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60 sv, dv = l[:-1].split() |
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61 self.map[sv] = dv |
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62 origrevmapfile.close() |
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63 except IOError: |
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64 pass |
316 | 65 |
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66 # Read first the dst author map if any |
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67 authorfile = self.dest.authorfile() |
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68 if authorfile and os.path.exists(authorfile): |
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69 self.readauthormap(authorfile) |
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70 # Extend/Override with new author map if necessary |
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71 if opts.get('authors'): |
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72 self.readauthormap(opts.get('authors')) |
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73 self.authorfile = self.dest.authorfile() |
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74 |
316 | 75 def walktree(self, heads): |
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76 '''Return a mapping that identifies the uncommitted parents of every |
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77 uncommitted changeset.''' |
316 | 78 visit = heads |
79 known = {} | |
80 parents = {} | |
81 while visit: | |
82 n = visit.pop(0) | |
83 if n in known or n in self.map: continue | |
84 known[n] = 1 | |
85 self.commitcache[n] = self.source.getcommit(n) | |
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86 cp = self.commitcache[n].parents |
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87 parents[n] = [] |
316 | 88 for p in cp: |
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89 parents[n].append(p) |
316 | 90 visit.append(p) |
91 | |
92 return parents | |
93 | |
94 def toposort(self, parents): | |
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95 '''Return an ordering such that every uncommitted changeset is |
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96 preceeded by all its uncommitted ancestors.''' |
316 | 97 visit = parents.keys() |
98 seen = {} | |
99 children = {} | |
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100 |
316 | 101 while visit: |
102 n = visit.pop(0) | |
103 if n in seen: continue | |
104 seen[n] = 1 | |
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105 # Ensure that nodes without parents are present in the 'children' |
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106 # mapping. |
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107 children.setdefault(n, []) |
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108 for p in parents[n]: |
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109 if not p in self.map: |
316 | 110 visit.append(p) |
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111 children.setdefault(p, []).append(n) |
316 | 112 |
113 s = [] | |
114 removed = {} | |
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115 visit = children.keys() |
316 | 116 while visit: |
117 n = visit.pop(0) | |
118 if n in removed: continue | |
119 dep = 0 | |
120 if n in parents: | |
121 for p in parents[n]: | |
122 if p in self.map: continue | |
123 if p not in removed: | |
124 # we're still dependent | |
125 visit.append(n) | |
126 dep = 1 | |
127 break | |
128 | |
129 if not dep: | |
130 # all n's parents are in the list | |
131 removed[n] = 1 | |
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132 if n not in self.map: |
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133 s.append(n) |
316 | 134 if n in children: |
135 for c in children[n]: | |
136 visit.insert(0, c) | |
137 | |
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138 if self.opts.get('datesort'): |
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139 depth = {} |
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140 for n in s: |
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141 depth[n] = 0 |
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142 pl = [p for p in self.commitcache[n].parents |
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143 if p not in self.map] |
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144 if pl: |
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145 depth[n] = max([depth[p] for p in pl]) + 1 |
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146 |
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147 s = [(depth[n], self.commitcache[n].date, n) for n in s] |
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148 s.sort() |
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149 s = [e[2] for e in s] |
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150 |
316 | 151 return s |
152 | |
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153 def mapentry(self, src, dst): |
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154 if self.revmapfilefd is None: |
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155 try: |
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156 self.revmapfilefd = open(self.revmapfile, "a") |
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157 except IOError, (errno, strerror): |
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158 raise util.Abort("Could not open map file %s: %s, %s\n" % (self.revmapfile, errno, strerror)) |
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159 self.map[src] = dst |
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160 self.revmapfilefd.write("%s %s\n" % (src, dst)) |
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161 self.revmapfilefd.flush() |
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162 |
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163 def writeauthormap(self): |
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164 authorfile = self.authorfile |
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165 if authorfile: |
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166 self.ui.status('Writing author map file %s\n' % authorfile) |
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167 ofile = open(authorfile, 'w+') |
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168 for author in self.authors: |
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169 ofile.write("%s=%s\n" % (author, self.authors[author])) |
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170 ofile.close() |
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171 |
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172 def readauthormap(self, authorfile): |
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173 afile = open(authorfile, 'r') |
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174 for line in afile: |
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175 try: |
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176 srcauthor = line.split('=')[0].strip() |
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177 dstauthor = line.split('=')[1].strip() |
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178 if srcauthor in self.authors and dstauthor != self.authors[srcauthor]: |
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179 self.ui.status( |
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180 'Overriding mapping for author %s, was %s, will be %s\n' |
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181 % (srcauthor, self.authors[srcauthor], dstauthor)) |
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182 else: |
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183 self.ui.debug('Mapping author %s to %s\n' |
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184 % (srcauthor, dstauthor)) |
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185 self.authors[srcauthor] = dstauthor |
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186 except IndexError: |
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187 self.ui.warn( |
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188 'Ignoring bad line in author file map %s: %s\n' |
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189 % (authorfile, line)) |
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190 afile.close() |
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191 |
316 | 192 def copy(self, rev): |
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193 c = self.commitcache[rev] |
316 | 194 files = self.source.getchanges(rev) |
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195 |
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196 do_copies = hasattr(self.dest, 'copyfile') |
316 | 197 |
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198 for f, v in files: |
316 | 199 try: |
200 data = self.source.getfile(f, v) | |
201 except IOError, inst: | |
202 self.dest.delfile(f) | |
203 else: | |
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204 e = self.source.getmode(f, v) |
316 | 205 self.dest.putfile(f, e, data) |
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206 if do_copies: |
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207 if f in c.copies: |
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208 # Merely marks that a copy happened. |
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209 self.dest.copyfile(c.copies[f], f) |
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210 |
316 | 211 |
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212 r = [self.map[v] for v in c.parents] |
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213 f = [f for f, v in files] |
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214 newnode = self.dest.putcommit(f, r, c) |
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215 self.mapentry(rev, newnode) |
316 | 216 |
217 def convert(self): | |
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218 try: |
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219 self.source.setrevmap(self.map) |
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220 self.ui.status("scanning source...\n") |
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221 heads = self.source.getheads() |
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222 parents = self.walktree(heads) |
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223 self.ui.status("sorting...\n") |
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224 t = self.toposort(parents) |
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225 num = len(t) |
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226 c = None |
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227 |
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228 self.ui.status("converting...\n") |
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229 for c in t: |
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230 num -= 1 |
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231 desc = self.commitcache[c].desc |
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232 if "\n" in desc: |
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233 desc = desc.splitlines()[0] |
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234 author = self.commitcache[c].author |
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235 author = self.authors.get(author, author) |
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236 self.commitcache[c].author = author |
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237 self.ui.status("%d %s\n" % (num, desc)) |
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238 self.copy(c) |
316 | 239 |
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240 tags = self.source.gettags() |
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241 ctags = {} |
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242 for k in tags: |
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243 v = tags[k] |
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244 if v in self.map: |
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245 ctags[k] = self.map[v] |
316 | 246 |
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247 if c and ctags: |
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248 nrev = self.dest.puttags(ctags) |
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249 # write another hash correspondence to override the previous |
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250 # one so we don't end up with extra tag heads |
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251 if nrev: |
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252 self.mapentry(c, nrev) |
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253 |
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254 self.writeauthormap() |
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255 finally: |
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256 self.cleanup() |
694 | 257 |
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258 def cleanup(self): |
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259 if self.revmapfilefd: |
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260 self.revmapfilefd.close() |
694 | 261 |
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262 def _convert(ui, src, dest=None, revmapfile=None, **opts): |
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263 """Convert a foreign SCM repository to a Mercurial one. |
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264 |
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265 Accepted source formats: |
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266 - GIT |
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267 - CVS |
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268 - SVN |
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269 |
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270 Accepted destination formats: |
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271 - Mercurial |
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272 |
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273 If no revision is given, all revisions will be converted. Otherwise, |
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274 convert will only import up to the named revision (given in a format |
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275 understood by the source). |
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276 |
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277 If no destination directory name is specified, it defaults to the |
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278 basename of the source with '-hg' appended. If the destination |
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279 repository doesn't exist, it will be created. |
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280 |
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281 If <revmapfile> isn't given, it will be put in a default location |
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282 (<dest>/.hg/shamap by default). The <revmapfile> is a simple text |
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283 file that maps each source commit ID to the destination ID for |
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284 that revision, like so: |
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285 <source ID> <destination ID> |
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286 |
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287 If the file doesn't exist, it's automatically created. It's updated |
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288 on each commit copied, so convert-repo can be interrupted and can |
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289 be run repeatedly to copy new commits. |
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290 |
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291 The [username mapping] file is a simple text file that maps each source |
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292 commit author to a destination commit author. It is handy for source SCMs |
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293 that use unix logins to identify authors (eg: CVS). One line per author |
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294 mapping and the line format is: |
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295 srcauthor=whatever string you want |
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296 """ |
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297 |
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298 util._encoding = 'UTF-8' |
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299 |
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300 if not dest: |
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301 dest = hg.defaultdest(src) + "-hg" |
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302 ui.status("assuming destination %s\n" % dest) |
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303 |
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304 # Try to be smart and initalize things when required |
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305 created = False |
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306 if os.path.isdir(dest): |
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307 if len(os.listdir(dest)) > 0: |
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308 try: |
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309 hg.repository(ui, dest) |
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310 ui.status("destination %s is a Mercurial repository\n" % dest) |
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311 except hg.RepoError: |
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312 raise util.Abort( |
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313 "destination directory %s is not empty.\n" |
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314 "Please specify an empty directory to be initialized\n" |
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315 "or an already initialized mercurial repository" |
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316 % dest) |
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317 else: |
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318 ui.status("initializing destination %s repository\n" % dest) |
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319 hg.repository(ui, dest, create=True) |
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320 created = True |
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321 elif os.path.exists(dest): |
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322 raise util.Abort("destination %s exists and is not a directory" % dest) |
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323 else: |
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324 ui.status("initializing destination %s repository\n" % dest) |
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325 hg.repository(ui, dest, create=True) |
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326 created = True |
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327 |
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328 destc = convertsink(ui, dest) |
316 | 329 |
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330 try: |
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331 srcc = convertsource(ui, src, rev=opts.get('rev')) |
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332 except Exception: |
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333 if created: |
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334 shutil.rmtree(dest, True) |
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335 raise |
316 | 336 |
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337 if not revmapfile: |
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338 try: |
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339 revmapfile = destc.revmapfile() |
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340 except: |
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341 revmapfile = os.path.join(destc, "map") |
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342 |
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343 c = convert(ui, srcc, destc, revmapfile, opts) |
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344 c.convert() |
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345 |
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346 cmdtable = { |
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347 "convert": |
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348 (_convert, |
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349 [('A', 'authors', '', 'username mapping filename'), |
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350 ('r', 'rev', '', 'import up to target revision REV'), |
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351 ('', 'datesort', None, 'try to sort changesets by date')], |
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352 'hg convert [OPTION]... SOURCE [DEST [MAPFILE]]'), |
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353 } |