Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 1 | #! /usr/bin/python |
| 2 | |
Mark Drago | 1bc7c13 | 2008-01-14 20:11:19 -0500 | [diff] [blame] | 3 | """ hg-to-git.py - A Mercurial to GIT converter |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 4 | |
| 5 | Copyright (C)2007 Stelian Pop <stelian@popies.net> |
| 6 | |
| 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) |
| 10 | any later version. |
| 11 | |
| 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. |
| 16 | |
| 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. |
| 20 | """ |
| 21 | |
| 22 | import os, os.path, sys |
| 23 | import tempfile, popen2, pickle, getopt |
| 24 | import re |
| 25 | |
| 26 | # Maps hg version -> git version |
| 27 | hgvers = {} |
| 28 | # List of children for each hg revision |
| 29 | hgchildren = {} |
Mark Drago | 1bc7c13 | 2008-01-14 20:11:19 -0500 | [diff] [blame] | 30 | # List of parents for each hg revision |
| 31 | hgparents = {} |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 32 | # Current branch for each hg revision |
| 33 | hgbranch = {} |
Michael Gebetsroither | 7c0d741 | 2007-10-06 23:16:51 +0200 | [diff] [blame] | 34 | # Number of new changesets converted from hg |
| 35 | hgnewcsets = 0 |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 36 | |
| 37 | #------------------------------------------------------------------------------ |
| 38 | |
| 39 | def usage(): |
| 40 | |
| 41 | print """\ |
| 42 | %s: [OPTIONS] <hgprj> |
| 43 | |
| 44 | options: |
| 45 | -s, --gitstate=FILE: name of the state to be saved/read |
| 46 | for incrementals |
Michael Gebetsroither | 7c0d741 | 2007-10-06 23:16:51 +0200 | [diff] [blame] | 47 | -n, --nrepack=INT: number of changesets that will trigger |
| 48 | a repack (default=0, -1 to deactivate) |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 49 | |
| 50 | required: |
| 51 | hgprj: name of the HG project to import (directory) |
| 52 | """ % sys.argv[0] |
| 53 | |
| 54 | #------------------------------------------------------------------------------ |
| 55 | |
| 56 | def getgitenv(user, date): |
| 57 | env = '' |
| 58 | elems = re.compile('(.*?)\s+<(.*)>').match(user) |
| 59 | if elems: |
| 60 | env += 'export GIT_AUTHOR_NAME="%s" ;' % elems.group(1) |
| 61 | env += 'export GIT_COMMITER_NAME="%s" ;' % elems.group(1) |
| 62 | env += 'export GIT_AUTHOR_EMAIL="%s" ;' % elems.group(2) |
| 63 | env += 'export GIT_COMMITER_EMAIL="%s" ;' % elems.group(2) |
| 64 | else: |
| 65 | env += 'export GIT_AUTHOR_NAME="%s" ;' % user |
| 66 | env += 'export GIT_COMMITER_NAME="%s" ;' % user |
| 67 | env += 'export GIT_AUTHOR_EMAIL= ;' |
| 68 | env += 'export GIT_COMMITER_EMAIL= ;' |
| 69 | |
| 70 | env += 'export GIT_AUTHOR_DATE="%s" ;' % date |
| 71 | env += 'export GIT_COMMITTER_DATE="%s" ;' % date |
| 72 | return env |
| 73 | |
| 74 | #------------------------------------------------------------------------------ |
| 75 | |
| 76 | state = '' |
Michael Gebetsroither | 7c0d741 | 2007-10-06 23:16:51 +0200 | [diff] [blame] | 77 | opt_nrepack = 0 |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 78 | |
| 79 | try: |
Michael Gebetsroither | 7c0d741 | 2007-10-06 23:16:51 +0200 | [diff] [blame] | 80 | opts, args = getopt.getopt(sys.argv[1:], 's:t:n:', ['gitstate=', 'tempdir=', 'nrepack=']) |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 81 | for o, a in opts: |
| 82 | if o in ('-s', '--gitstate'): |
| 83 | state = a |
| 84 | state = os.path.abspath(state) |
Michael Gebetsroither | 7c0d741 | 2007-10-06 23:16:51 +0200 | [diff] [blame] | 85 | if o in ('-n', '--nrepack'): |
| 86 | opt_nrepack = int(a) |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 87 | if len(args) != 1: |
| 88 | raise('params') |
| 89 | except: |
| 90 | usage() |
| 91 | sys.exit(1) |
| 92 | |
| 93 | hgprj = args[0] |
| 94 | os.chdir(hgprj) |
| 95 | |
| 96 | if state: |
| 97 | if os.path.exists(state): |
| 98 | print 'State does exist, reading' |
| 99 | f = open(state, 'r') |
| 100 | hgvers = pickle.load(f) |
| 101 | else: |
| 102 | print 'State does not exist, first run' |
| 103 | |
Mark Drago | 1bc7c13 | 2008-01-14 20:11:19 -0500 | [diff] [blame] | 104 | tip = os.popen('hg tip --template "{rev}"').read() |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 105 | print 'tip is', tip |
| 106 | |
| 107 | # Calculate the branches |
| 108 | print 'analysing the branches...' |
| 109 | hgchildren["0"] = () |
Mark Drago | 1bc7c13 | 2008-01-14 20:11:19 -0500 | [diff] [blame] | 110 | hgparents["0"] = (None, None) |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 111 | hgbranch["0"] = "master" |
| 112 | for cset in range(1, int(tip) + 1): |
| 113 | hgchildren[str(cset)] = () |
Stelian Pop | 13bf1a9 | 2008-02-15 22:20:44 +0100 | [diff] [blame] | 114 | prnts = os.popen('hg log -r %d --template "{parents}"' % cset).read().strip().split(' ') |
Mark Drago | 1bc7c13 | 2008-01-14 20:11:19 -0500 | [diff] [blame] | 115 | prnts = map(lambda x: x[:x.find(':')], prnts) |
| 116 | if prnts[0] != '': |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 117 | parent = prnts[0].strip() |
| 118 | else: |
| 119 | parent = str(cset - 1) |
| 120 | hgchildren[parent] += ( str(cset), ) |
| 121 | if len(prnts) > 1: |
| 122 | mparent = prnts[1].strip() |
| 123 | hgchildren[mparent] += ( str(cset), ) |
| 124 | else: |
| 125 | mparent = None |
| 126 | |
Mark Drago | 1bc7c13 | 2008-01-14 20:11:19 -0500 | [diff] [blame] | 127 | hgparents[str(cset)] = (parent, mparent) |
| 128 | |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 129 | if mparent: |
| 130 | # For merge changesets, take either one, preferably the 'master' branch |
| 131 | if hgbranch[mparent] == 'master': |
| 132 | hgbranch[str(cset)] = 'master' |
| 133 | else: |
| 134 | hgbranch[str(cset)] = hgbranch[parent] |
| 135 | else: |
| 136 | # Normal changesets |
| 137 | # For first children, take the parent branch, for the others create a new branch |
| 138 | if hgchildren[parent][0] == str(cset): |
| 139 | hgbranch[str(cset)] = hgbranch[parent] |
| 140 | else: |
| 141 | hgbranch[str(cset)] = "branch-" + str(cset) |
| 142 | |
| 143 | if not hgvers.has_key("0"): |
| 144 | print 'creating repository' |
| 145 | os.system('git-init-db') |
| 146 | |
| 147 | # loop through every hg changeset |
| 148 | for cset in range(int(tip) + 1): |
| 149 | |
| 150 | # incremental, already seen |
| 151 | if hgvers.has_key(str(cset)): |
| 152 | continue |
Michael Gebetsroither | 7c0d741 | 2007-10-06 23:16:51 +0200 | [diff] [blame] | 153 | hgnewcsets += 1 |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 154 | |
| 155 | # get info |
Mark Drago | 1bc7c13 | 2008-01-14 20:11:19 -0500 | [diff] [blame] | 156 | log_data = os.popen('hg log -r %d --template "{tags}\n{date|date}\n{author}\n"' % cset).readlines() |
| 157 | tag = log_data[0].strip() |
| 158 | date = log_data[1].strip() |
| 159 | user = log_data[2].strip() |
| 160 | parent = hgparents[str(cset)][0] |
| 161 | mparent = hgparents[str(cset)][1] |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 162 | |
Mark Drago | 1bc7c13 | 2008-01-14 20:11:19 -0500 | [diff] [blame] | 163 | #get comment |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 164 | (fdcomment, filecomment) = tempfile.mkstemp() |
Mark Drago | 1bc7c13 | 2008-01-14 20:11:19 -0500 | [diff] [blame] | 165 | csetcomment = os.popen('hg log -r %d --template "{desc}"' % cset).read().strip() |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 166 | os.write(fdcomment, csetcomment) |
| 167 | os.close(fdcomment) |
| 168 | |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 169 | print '-----------------------------------------' |
| 170 | print 'cset:', cset |
| 171 | print 'branch:', hgbranch[str(cset)] |
| 172 | print 'user:', user |
| 173 | print 'date:', date |
| 174 | print 'comment:', csetcomment |
Mark Drago | 1bc7c13 | 2008-01-14 20:11:19 -0500 | [diff] [blame] | 175 | if parent: |
| 176 | print 'parent:', parent |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 177 | if mparent: |
| 178 | print 'mparent:', mparent |
| 179 | if tag: |
| 180 | print 'tag:', tag |
| 181 | print '-----------------------------------------' |
| 182 | |
| 183 | # checkout the parent if necessary |
| 184 | if cset != 0: |
| 185 | if hgbranch[str(cset)] == "branch-" + str(cset): |
| 186 | print 'creating new branch', hgbranch[str(cset)] |
| 187 | os.system('git-checkout -b %s %s' % (hgbranch[str(cset)], hgvers[parent])) |
| 188 | else: |
| 189 | print 'checking out branch', hgbranch[str(cset)] |
| 190 | os.system('git-checkout %s' % hgbranch[str(cset)]) |
| 191 | |
| 192 | # merge |
| 193 | if mparent: |
| 194 | if hgbranch[parent] == hgbranch[str(cset)]: |
| 195 | otherbranch = hgbranch[mparent] |
| 196 | else: |
| 197 | otherbranch = hgbranch[parent] |
| 198 | print 'merging', otherbranch, 'into', hgbranch[str(cset)] |
| 199 | os.system(getgitenv(user, date) + 'git-merge --no-commit -s ours "" %s %s' % (hgbranch[str(cset)], otherbranch)) |
| 200 | |
| 201 | # remove everything except .git and .hg directories |
| 202 | os.system('find . \( -path "./.hg" -o -path "./.git" \) -prune -o ! -name "." -print | xargs rm -rf') |
| 203 | |
| 204 | # repopulate with checkouted files |
| 205 | os.system('hg update -C %d' % cset) |
| 206 | |
| 207 | # add new files |
| 208 | os.system('git-ls-files -x .hg --others | git-update-index --add --stdin') |
| 209 | # delete removed files |
| 210 | os.system('git-ls-files -x .hg --deleted | git-update-index --remove --stdin') |
| 211 | |
| 212 | # commit |
Junio C Hamano | 90e0653 | 2007-12-06 07:26:29 -0800 | [diff] [blame] | 213 | os.system(getgitenv(user, date) + 'git commit --allow-empty -a -F %s' % filecomment) |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 214 | os.unlink(filecomment) |
| 215 | |
| 216 | # tag |
| 217 | if tag and tag != 'tip': |
| 218 | os.system(getgitenv(user, date) + 'git-tag %s' % tag) |
| 219 | |
| 220 | # delete branch if not used anymore... |
| 221 | if mparent and len(hgchildren[str(cset)]): |
| 222 | print "Deleting unused branch:", otherbranch |
| 223 | os.system('git-branch -d %s' % otherbranch) |
| 224 | |
| 225 | # retrieve and record the version |
Mark Drago | 1bc7c13 | 2008-01-14 20:11:19 -0500 | [diff] [blame] | 226 | vvv = os.popen('git-show --quiet --pretty=format:%H').read() |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 227 | print 'record', cset, '->', vvv |
| 228 | hgvers[str(cset)] = vvv |
| 229 | |
Michael Gebetsroither | 7c0d741 | 2007-10-06 23:16:51 +0200 | [diff] [blame] | 230 | if hgnewcsets >= opt_nrepack and opt_nrepack != -1: |
| 231 | os.system('git-repack -a -d') |
Stelian Pop | 98d47d4 | 2007-01-12 22:57:03 +0100 | [diff] [blame] | 232 | |
| 233 | # write the state for incrementals |
| 234 | if state: |
| 235 | print 'Writing state' |
| 236 | f = open(state, 'w') |
| 237 | pickle.dump(hgvers, f) |
| 238 | |
| 239 | # vim: et ts=8 sw=4 sts=4 |