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
33 #------------------------------------------------------------------------------
41 -s, --gitstate=FILE: name of the state to be saved/read
45 hgprj: name of the HG project to import (directory)
48 #------------------------------------------------------------------------------
50 def getgitenv(user, date):
52 elems = re.compile('(.*?)\s+<(.*)>').match(user)
54 env += 'export GIT_AUTHOR_NAME="%s" ;' % elems.group(1)
55 env += 'export GIT_COMMITER_NAME="%s" ;' % elems.group(1)
56 env += 'export GIT_AUTHOR_EMAIL="%s" ;' % elems.group(2)
57 env += 'export GIT_COMMITER_EMAIL="%s" ;' % elems.group(2)
59 env += 'export GIT_AUTHOR_NAME="%s" ;' % user
60 env += 'export GIT_COMMITER_NAME="%s" ;' % user
61 env += 'export GIT_AUTHOR_EMAIL= ;'
62 env += 'export GIT_COMMITER_EMAIL= ;'
64 env += 'export GIT_AUTHOR_DATE="%s" ;' % date
65 env += 'export GIT_COMMITTER_DATE="%s" ;' % date
68 #------------------------------------------------------------------------------
73 opts, args = getopt.getopt(sys.argv[1:], 's:t:', ['gitstate=', 'tempdir='])
75 if o in ('-s', '--gitstate'):
77 state = os.path.abspath(state)
89 if os.path.exists(state):
90 print 'State does exist, reading'
92 hgvers = pickle.load(f)
94 print 'State does not exist, first run'
96 tip = os.popen('hg tip | head -1 | cut -f 2 -d :').read().strip()
99 # Calculate the branches
100 print 'analysing the branches...'
102 hgbranch["0"] = "master"
103 for cset in range(1, int(tip) + 1):
104 hgchildren[str(cset)] = ()
105 prnts = os.popen('hg log -r %d | grep ^parent: | cut -f 2 -d :' % cset).readlines()
107 parent = prnts[0].strip()
109 parent = str(cset - 1)
110 hgchildren[parent] += ( str(cset), )
112 mparent = prnts[1].strip()
113 hgchildren[mparent] += ( str(cset), )
118 # For merge changesets, take either one, preferably the 'master' branch
119 if hgbranch[mparent] == 'master':
120 hgbranch[str(cset)] = 'master'
122 hgbranch[str(cset)] = hgbranch[parent]
125 # For first children, take the parent branch, for the others create a new branch
126 if hgchildren[parent][0] == str(cset):
127 hgbranch[str(cset)] = hgbranch[parent]
129 hgbranch[str(cset)] = "branch-" + str(cset)
131 if not hgvers.has_key("0"):
132 print 'creating repository'
133 os.system('git-init-db')
135 # loop through every hg changeset
136 for cset in range(int(tip) + 1):
138 # incremental, already seen
139 if hgvers.has_key(str(cset)):
143 prnts = os.popen('hg log -r %d | grep ^parent: | cut -f 2 -d :' % cset).readlines()
145 parent = prnts[0].strip()
147 parent = str(cset - 1)
149 mparent = prnts[1].strip()
153 (fdcomment, filecomment) = tempfile.mkstemp()
154 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()
155 os.write(fdcomment, csetcomment)
158 date = os.popen('hg log -r %d | grep ^date: | cut -f 2- -d :' % cset).read().strip()
160 tag = os.popen('hg log -r %d | grep ^tag: | cut -f 2- -d :' % cset).read().strip()
162 user = os.popen('hg log -r %d | grep ^user: | cut -f 2- -d :' % cset).read().strip()
164 print '-----------------------------------------'
166 print 'branch:', hgbranch[str(cset)]
169 print 'comment:', csetcomment
170 print 'parent:', parent
172 print 'mparent:', mparent
175 print '-----------------------------------------'
177 # checkout the parent if necessary
179 if hgbranch[str(cset)] == "branch-" + str(cset):
180 print 'creating new branch', hgbranch[str(cset)]
181 os.system('git-checkout -b %s %s' % (hgbranch[str(cset)], hgvers[parent]))
183 print 'checking out branch', hgbranch[str(cset)]
184 os.system('git-checkout %s' % hgbranch[str(cset)])
188 if hgbranch[parent] == hgbranch[str(cset)]:
189 otherbranch = hgbranch[mparent]
191 otherbranch = hgbranch[parent]
192 print 'merging', otherbranch, 'into', hgbranch[str(cset)]
193 os.system(getgitenv(user, date) + 'git-merge --no-commit -s ours "" %s %s' % (hgbranch[str(cset)], otherbranch))
195 # remove everything except .git and .hg directories
196 os.system('find . \( -path "./.hg" -o -path "./.git" \) -prune -o ! -name "." -print | xargs rm -rf')
198 # repopulate with checkouted files
199 os.system('hg update -C %d' % cset)
202 os.system('git-ls-files -x .hg --others | git-update-index --add --stdin')
203 # delete removed files
204 os.system('git-ls-files -x .hg --deleted | git-update-index --remove --stdin')
207 os.system(getgitenv(user, date) + 'git-commit -a -F %s' % filecomment)
208 os.unlink(filecomment)
211 if tag and tag != 'tip':
212 os.system(getgitenv(user, date) + 'git-tag %s' % tag)
214 # delete branch if not used anymore...
215 if mparent and len(hgchildren[str(cset)]):
216 print "Deleting unused branch:", otherbranch
217 os.system('git-branch -d %s' % otherbranch)
219 # retrieve and record the version
220 vvv = os.popen('git-show | head -1').read()
221 vvv = vvv[vvv.index(' ') + 1 : ].strip()
222 print 'record', cset, '->', vvv
223 hgvers[str(cset)] = vvv
225 os.system('git-repack -a -d')
227 # write the state for incrementals
229 print 'Writing state'
231 pickle.dump(hgvers, f)
233 # vim: et ts=8 sw=4 sts=4