Mercurial > hg > mercurial-crew-with-dirclash
annotate contrib/convert-repo @ 970:bf375e93073b
Fix possible unitialized variable warnings
author | mpm@selenic.com |
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date | Sat, 20 Aug 2005 01:29:04 -0700 |
parents | 574869103985 |
children | 227cfbe34109 |
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 # | |
6 # In its current form, it's hardcoded to convert incrementally between | |
7 # git and Mercurial. | |
8 # | |
9 # To use, you must first import the first git version into Mercurial, | |
10 # and establish a mapping between the git commit hash and the hash in | |
11 # Mercurial for that version. This mapping is kept in a simple text | |
12 # file with lines like so: | |
13 # | |
14 # <git hash> <mercurial hash> | |
15 # | |
16 # To convert the rest of the repo, run: | |
17 # | |
18 # convert-repo <git-dir> <hg-dir> <mapfile> | |
19 # | |
20 # This updates the mapfile on each commit copied, so it can be | |
21 # interrupted and can be run repeatedly to copy new commits. | |
22 | |
694 | 23 import sys, os, zlib, sha, time |
450 | 24 from mercurial import hg, ui, util |
316 | 25 |
26 class convert_git: | |
27 def __init__(self, path): | |
28 self.path = path | |
29 | |
30 def getheads(self): | |
31 h = file(self.path + "/.git/HEAD").read()[:-1] | |
32 return [h] | |
33 | |
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34 def catfile(self, rev, type): |
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35 if rev == "0" * 40: raise IOError() |
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36 path = os.getcwd() |
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37 os.chdir(self.path) |
694 | 38 fh = os.popen("git-cat-file %s %s 2>/dev/null" % (type, rev)) |
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39 os.chdir(path) |
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40 return fh.read() |
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41 |
316 | 42 def getfile(self, name, rev): |
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43 return self.catfile(rev, "blob") |
316 | 44 |
45 def getchanges(self, version): | |
46 path = os.getcwd() | |
47 os.chdir(self.path) | |
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48 fh = os.popen("git-diff-tree --root -m -r %s" % (version)) |
316 | 49 os.chdir(path) |
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50 |
316 | 51 changes = [] |
52 for l in fh: | |
53 if "\t" not in l: continue | |
54 m, f = l[:-1].split("\t") | |
55 m = m.split() | |
56 h = m[3] | |
57 p = (m[1] == "100755") | |
58 changes.append((f, h, p)) | |
59 return changes | |
60 | |
61 def getcommit(self, version): | |
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62 c = self.catfile(version, "commit") # read the commit hash |
316 | 63 end = c.find("\n\n") |
64 message = c[end+2:] | |
65 l = c[:end].splitlines() | |
66 manifest = l[0].split()[1] | |
67 parents = [] | |
68 for e in l[1:]: | |
69 n,v = e.split(" ", 1) | |
70 if n == "author": | |
71 p = v.split() | |
72 date = " ".join(p[-2:]) | |
73 author = " ".join(p[:-2]) | |
74 if author[0] == "<": author = author[1:-1] | |
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75 if n == "committer": |
431 | 76 p = v.split() |
77 date = " ".join(p[-2:]) | |
78 committer = " ".join(p[:-2]) | |
79 if committer[0] == "<": committer = committer[1:-1] | |
80 message += "\ncommitter: %s %s\n" % (committer, date) | |
316 | 81 if n == "parent": parents.append(v) |
82 return (parents, author, date, message) | |
83 | |
694 | 84 def gettags(self): |
85 tags = {} | |
86 for f in os.listdir(self.path + "/.git/refs/tags"): | |
87 try: | |
88 h = file(self.path + "/.git/refs/tags/" + f).read().strip() | |
89 p, a, d, m = self.getcommit(h) | |
90 if not p: p = [h] # git is ugly, don't blame me | |
91 tags[f] = p[0] | |
92 except: | |
93 pass | |
94 return tags | |
95 | |
316 | 96 class convert_mercurial: |
97 def __init__(self, path): | |
98 self.path = path | |
99 u = ui.ui() | |
100 self.repo = hg.repository(u, path) | |
101 | |
102 def getheads(self): | |
103 h = self.repo.changelog.heads() | |
104 h = [ hg.hex(x) for x in h ] | |
105 return h | |
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106 |
316 | 107 def putfile(self, f, e, data): |
108 self.repo.wfile(f, "w").write(data) | |
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109 if self.repo.dirstate.state(f) == '?': |
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110 self.repo.dirstate.update([f], "a") |
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111 |
450 | 112 util.set_exec(self.repo.wjoin(f), e) |
316 | 113 |
114 def delfile(self, f): | |
115 try: | |
116 os.unlink(self.repo.wjoin(f)) | |
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117 #self.repo.remove([f]) |
316 | 118 except: |
119 pass | |
120 | |
121 def putcommit(self, files, parents, author, dest, text): | |
431 | 122 seen = {} |
123 pl = [] | |
124 for p in parents: | |
125 if p not in seen: | |
126 pl.append(p) | |
127 seen[p] = 1 | |
128 parents = pl | |
316 | 129 |
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130 if len(parents) < 2: parents.append("0" * 40) |
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131 if len(parents) < 2: parents.append("0" * 40) |
431 | 132 p2 = parents.pop(0) |
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133 |
431 | 134 while parents: |
135 p1 = p2 | |
136 p2 = parents.pop(0) | |
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137 self.repo.rawcommit(files, text, author, dest, |
431 | 138 hg.bin(p1), hg.bin(p2)) |
139 text = "(octopus merge fixup)\n" | |
140 | |
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141 return hg.hex(self.repo.changelog.tip()) |
316 | 142 |
694 | 143 def puttags(self, tags): |
144 try: | |
145 old = self.repo.wfile(".hgtags").read() | |
146 oldlines = old.splitlines(1) | |
147 oldlines.sort() | |
148 except: | |
149 oldlines = [] | |
150 | |
151 k = tags.keys() | |
152 k.sort() | |
153 newlines = [] | |
154 for tag in k: | |
155 newlines.append("%s %s\n" % (tags[tag], tag)) | |
156 | |
157 newlines.sort() | |
158 | |
159 if newlines != oldlines: | |
160 print "updating tags" | |
161 f = self.repo.wfile(".hgtags", "w") | |
162 f.write("".join(newlines)) | |
163 f.close() | |
164 if not oldlines: self.repo.add([".hgtags"]) | |
165 date = "%s 0" % time.mktime(time.gmtime()) | |
166 self.repo.rawcommit([".hgtags"], "update tags", "convert-repo", | |
167 date, self.repo.changelog.tip(), hg.nullid) | |
168 | |
316 | 169 class convert: |
170 def __init__(self, source, dest, mapfile): | |
171 self.source = source | |
172 self.dest = dest | |
173 self.mapfile = mapfile | |
174 self.commitcache = {} | |
175 | |
176 self.map = {} | |
177 for l in file(self.mapfile): | |
178 sv, dv = l[:-1].split() | |
179 self.map[sv] = dv | |
180 | |
181 def walktree(self, heads): | |
182 visit = heads | |
183 known = {} | |
184 parents = {} | |
185 while visit: | |
186 n = visit.pop(0) | |
187 if n in known or n in self.map: continue | |
188 known[n] = 1 | |
189 self.commitcache[n] = self.source.getcommit(n) | |
190 cp = self.commitcache[n][0] | |
191 for p in cp: | |
192 parents.setdefault(n, []).append(p) | |
193 visit.append(p) | |
194 | |
195 return parents | |
196 | |
197 def toposort(self, parents): | |
198 visit = parents.keys() | |
199 seen = {} | |
200 children = {} | |
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201 |
316 | 202 while visit: |
203 n = visit.pop(0) | |
204 if n in seen: continue | |
205 seen[n] = 1 | |
206 pc = 0 | |
207 if n in parents: | |
208 for p in parents[n]: | |
209 if p not in self.map: pc += 1 | |
210 visit.append(p) | |
211 children.setdefault(p, []).append(n) | |
212 if not pc: root = n | |
213 | |
214 s = [] | |
215 removed = {} | |
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216 visit = children.keys() |
316 | 217 while visit: |
218 n = visit.pop(0) | |
219 if n in removed: continue | |
220 dep = 0 | |
221 if n in parents: | |
222 for p in parents[n]: | |
223 if p in self.map: continue | |
224 if p not in removed: | |
225 # we're still dependent | |
226 visit.append(n) | |
227 dep = 1 | |
228 break | |
229 | |
230 if not dep: | |
231 # all n's parents are in the list | |
232 removed[n] = 1 | |
233 s.append(n) | |
234 if n in children: | |
235 for c in children[n]: | |
236 visit.insert(0, c) | |
237 | |
238 return s | |
239 | |
240 def copy(self, rev): | |
241 p, a, d, t = self.commitcache[rev] | |
242 files = self.source.getchanges(rev) | |
243 | |
244 for f,v,e in files: | |
245 try: | |
246 data = self.source.getfile(f, v) | |
247 except IOError, inst: | |
248 self.dest.delfile(f) | |
249 else: | |
250 self.dest.putfile(f, e, data) | |
251 | |
252 r = [self.map[v] for v in p] | |
253 f = [f for f,v,e in files] | |
254 self.map[rev] = self.dest.putcommit(f, r, a, d, t) | |
255 file(self.mapfile, "a").write("%s %s\n" % (rev, self.map[rev])) | |
256 | |
257 def convert(self): | |
258 heads = self.source.getheads() | |
259 parents = self.walktree(heads) | |
260 t = self.toposort(parents) | |
261 num = len(t) | |
262 | |
263 for c in t: | |
264 num -= 1 | |
265 if c in self.map: continue | |
266 desc = self.commitcache[c][3].splitlines()[0] | |
267 print num, desc | |
268 self.copy(c) | |
269 | |
694 | 270 tags = self.source.gettags() |
271 ctags = {} | |
272 for k in tags: | |
273 v = tags[k] | |
274 if v in self.map: | |
275 ctags[k] = self.map[v] | |
276 | |
277 self.dest.puttags(ctags) | |
278 | |
316 | 279 gitpath, hgpath, mapfile = sys.argv[1:] |
280 | |
281 c = convert(convert_git(gitpath), convert_mercurial(hgpath), mapfile) | |
282 c.convert() |