3 """ hg-to-svn.py - A Mercurial to GIT converter
5 Copyright (C)2007 Stelian Pop <stelian@popies.net>
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 import os, os.path, sys
23 import tempfile, popen2, pickle, getopt
26 # Maps hg version -> git version
28 # List of children for each hg revision
30 # Current branch for each hg revision
32 # Number of new changesets converted from hg
35 #------------------------------------------------------------------------------
43 -s, --gitstate=FILE: name of the state to be saved/read
45 -n, --nrepack=INT: number of changesets that will trigger
46 a repack (default=0, -1 to deactivate)
49 hgprj: name of the HG project to import (directory)
52 #------------------------------------------------------------------------------
54 def getgitenv(user, date):
56 elems = re.compile('(.*?)\s+<(.*)>').match(user)
58 env += 'export GIT_AUTHOR_NAME="%s" ;' % elems.group(1)
59 env += 'export GIT_COMMITER_NAME="%s" ;' % elems.group(1)
60 env += 'export GIT_AUTHOR_EMAIL="%s" ;' % elems.group(2)
61 env += 'export GIT_COMMITER_EMAIL="%s" ;' % elems.group(2)
63 env += 'export GIT_AUTHOR_NAME="%s" ;' % user
64 env += 'export GIT_COMMITER_NAME="%s" ;' % user
65 env += 'export GIT_AUTHOR_EMAIL= ;'
66 env += 'export GIT_COMMITER_EMAIL= ;'
68 env += 'export GIT_AUTHOR_DATE="%s" ;' % date
69 env += 'export GIT_COMMITTER_DATE="%s" ;' % date
72 #------------------------------------------------------------------------------
78 opts, args = getopt.getopt(sys.argv[1:], 's:t:n:', ['gitstate=', 'tempdir=', 'nrepack='])
80 if o in ('-s', '--gitstate'):
82 state = os.path.abspath(state)
83 if o in ('-n', '--nrepack'):
95 if os.path.exists(state):
96 print 'State does exist, reading'
98 hgvers = pickle.load(f)
100 print 'State does not exist, first run'
102 tip = os.popen('hg tip | head -1 | cut -f 2 -d :').read().strip()
105 # Calculate the branches
106 print 'analysing the branches...'
108 hgbranch["0"] = "master"
109 for cset in range(1, int(tip) + 1):
110 hgchildren[str(cset)] = ()
111 prnts = os.popen('hg log -r %d | grep ^parent: | cut -f 2 -d :' % cset).readlines()
113 parent = prnts[0].strip()
115 parent = str(cset - 1)
116 hgchildren[parent] += ( str(cset), )
118 mparent = prnts[1].strip()
119 hgchildren[mparent] += ( str(cset), )
124 # For merge changesets, take either one, preferably the 'master' branch
125 if hgbranch[mparent] == 'master':
126 hgbranch[str(cset)] = 'master'
128 hgbranch[str(cset)] = hgbranch[parent]
131 # For first children, take the parent branch, for the others create a new branch
132 if hgchildren[parent][0] == str(cset):
133 hgbranch[str(cset)] = hgbranch[parent]
135 hgbranch[str(cset)] = "branch-" + str(cset)
137 if not hgvers.has_key("0"):
138 print 'creating repository'
139 os.system('git-init-db')
141 # loop through every hg changeset
142 for cset in range(int(tip) + 1):
144 # incremental, already seen
145 if hgvers.has_key(str(cset)):
150 prnts = os.popen('hg log -r %d | grep ^parent: | cut -f 2 -d :' % cset).readlines()
152 parent = prnts[0].strip()
154 parent = str(cset - 1)
156 mparent = prnts[1].strip()
160 (fdcomment, filecomment) = tempfile.mkstemp()
161 csetcomment = os.popen('hg log -r %d -v | grep -v ^changeset: | grep -v ^parent: | grep -v ^user: | grep -v ^date | grep -v ^files: | grep -v ^description: | grep -v ^tag:' % cset).read().strip()
162 os.write(fdcomment, csetcomment)
165 date = os.popen('hg log -r %d | grep ^date: | cut -f 2- -d :' % cset).read().strip()
167 tag = os.popen('hg log -r %d | grep ^tag: | cut -f 2- -d :' % cset).read().strip()
169 user = os.popen('hg log -r %d | grep ^user: | cut -f 2- -d :' % cset).read().strip()
171 print '-----------------------------------------'
173 print 'branch:', hgbranch[str(cset)]
176 print 'comment:', csetcomment
177 print 'parent:', parent
179 print 'mparent:', mparent
182 print '-----------------------------------------'
184 # checkout the parent if necessary
186 if hgbranch[str(cset)] == "branch-" + str(cset):
187 print 'creating new branch', hgbranch[str(cset)]
188 os.system('git-checkout -b %s %s' % (hgbranch[str(cset)], hgvers[parent]))
190 print 'checking out branch', hgbranch[str(cset)]
191 os.system('git-checkout %s' % hgbranch[str(cset)])
195 if hgbranch[parent] == hgbranch[str(cset)]:
196 otherbranch = hgbranch[mparent]
198 otherbranch = hgbranch[parent]
199 print 'merging', otherbranch, 'into', hgbranch[str(cset)]
200 os.system(getgitenv(user, date) + 'git-merge --no-commit -s ours "" %s %s' % (hgbranch[str(cset)], otherbranch))
202 # remove everything except .git and .hg directories
203 os.system('find . \( -path "./.hg" -o -path "./.git" \) -prune -o ! -name "." -print | xargs rm -rf')
205 # repopulate with checkouted files
206 os.system('hg update -C %d' % cset)
209 os.system('git-ls-files -x .hg --others | git-update-index --add --stdin')
210 # delete removed files
211 os.system('git-ls-files -x .hg --deleted | git-update-index --remove --stdin')
214 os.system(getgitenv(user, date) + 'git-commit -a -F %s' % filecomment)
215 os.unlink(filecomment)
218 if tag and tag != 'tip':
219 os.system(getgitenv(user, date) + 'git-tag %s' % tag)
221 # delete branch if not used anymore...
222 if mparent and len(hgchildren[str(cset)]):
223 print "Deleting unused branch:", otherbranch
224 os.system('git-branch -d %s' % otherbranch)
226 # retrieve and record the version
227 vvv = os.popen('git-show | head -1').read()
228 vvv = vvv[vvv.index(' ') + 1 : ].strip()
229 print 'record', cset, '->', vvv
230 hgvers[str(cset)] = vvv
232 if hgnewcsets >= opt_nrepack and opt_nrepack != -1:
233 os.system('git-repack -a -d')
235 # write the state for incrementals
237 print 'Writing state'
239 pickle.dump(hgvers, f)
241 # vim: et ts=8 sw=4 sts=4