summaryrefslogtreecommitdiff
path: root/contrib/hg-to-git/hg-to-git.py
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/hg-to-git/hg-to-git.py')
-rwxr-xr-xcontrib/hg-to-git/hg-to-git.py250
1 files changed, 250 insertions, 0 deletions
diff --git a/contrib/hg-to-git/hg-to-git.py b/contrib/hg-to-git/hg-to-git.py
new file mode 100755
index 0000000000..7b03204ed1
--- /dev/null
+++ b/contrib/hg-to-git/hg-to-git.py
@@ -0,0 +1,250 @@
+#! /usr/bin/python
+
+""" hg-to-git.py - A Mercurial to GIT converter
+
+ Copyright (C)2007 Stelian Pop <stelian@popies.net>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+"""
+
+import os, os.path, sys
+import tempfile, popen2, pickle, getopt
+import re
+
+# Maps hg version -> git version
+hgvers = {}
+# List of children for each hg revision
+hgchildren = {}
+# List of parents for each hg revision
+hgparents = {}
+# Current branch for each hg revision
+hgbranch = {}
+# Number of new changesets converted from hg
+hgnewcsets = 0
+
+#------------------------------------------------------------------------------
+
+def usage():
+
+ print """\
+%s: [OPTIONS] <hgprj>
+
+options:
+ -s, --gitstate=FILE: name of the state to be saved/read
+ for incrementals
+ -n, --nrepack=INT: number of changesets that will trigger
+ a repack (default=0, -1 to deactivate)
+ -v, --verbose: be verbose
+
+required:
+ hgprj: name of the HG project to import (directory)
+""" % sys.argv[0]
+
+#------------------------------------------------------------------------------
+
+def getgitenv(user, date):
+ env = ''
+ elems = re.compile('(.*?)\s+<(.*)>').match(user)
+ if elems:
+ env += 'export GIT_AUTHOR_NAME="%s" ;' % elems.group(1)
+ env += 'export GIT_COMMITER_NAME="%s" ;' % elems.group(1)
+ env += 'export GIT_AUTHOR_EMAIL="%s" ;' % elems.group(2)
+ env += 'export GIT_COMMITER_EMAIL="%s" ;' % elems.group(2)
+ else:
+ env += 'export GIT_AUTHOR_NAME="%s" ;' % user
+ env += 'export GIT_COMMITER_NAME="%s" ;' % user
+ env += 'export GIT_AUTHOR_EMAIL= ;'
+ env += 'export GIT_COMMITER_EMAIL= ;'
+
+ env += 'export GIT_AUTHOR_DATE="%s" ;' % date
+ env += 'export GIT_COMMITTER_DATE="%s" ;' % date
+ return env
+
+#------------------------------------------------------------------------------
+
+state = ''
+opt_nrepack = 0
+verbose = False
+
+try:
+ opts, args = getopt.getopt(sys.argv[1:], 's:t:n:v', ['gitstate=', 'tempdir=', 'nrepack=', 'verbose'])
+ for o, a in opts:
+ if o in ('-s', '--gitstate'):
+ state = a
+ state = os.path.abspath(state)
+ if o in ('-n', '--nrepack'):
+ opt_nrepack = int(a)
+ if o in ('-v', '--verbose'):
+ verbose = True
+ if len(args) != 1:
+ raise Exception('params')
+except:
+ usage()
+ sys.exit(1)
+
+hgprj = args[0]
+os.chdir(hgprj)
+
+if state:
+ if os.path.exists(state):
+ if verbose:
+ print 'State does exist, reading'
+ f = open(state, 'r')
+ hgvers = pickle.load(f)
+ else:
+ print 'State does not exist, first run'
+
+sock = os.popen('hg tip --template "{rev}"')
+tip = sock.read()
+if sock.close():
+ sys.exit(1)
+if verbose:
+ print 'tip is', tip
+
+# Calculate the branches
+if verbose:
+ print 'analysing the branches...'
+hgchildren["0"] = ()
+hgparents["0"] = (None, None)
+hgbranch["0"] = "master"
+for cset in range(1, int(tip) + 1):
+ hgchildren[str(cset)] = ()
+ prnts = os.popen('hg log -r %d --template "{parents}"' % cset).read().strip().split(' ')
+ prnts = map(lambda x: x[:x.find(':')], prnts)
+ if prnts[0] != '':
+ parent = prnts[0].strip()
+ else:
+ parent = str(cset - 1)
+ hgchildren[parent] += ( str(cset), )
+ if len(prnts) > 1:
+ mparent = prnts[1].strip()
+ hgchildren[mparent] += ( str(cset), )
+ else:
+ mparent = None
+
+ hgparents[str(cset)] = (parent, mparent)
+
+ if mparent:
+ # For merge changesets, take either one, preferably the 'master' branch
+ if hgbranch[mparent] == 'master':
+ hgbranch[str(cset)] = 'master'
+ else:
+ hgbranch[str(cset)] = hgbranch[parent]
+ else:
+ # Normal changesets
+ # For first children, take the parent branch, for the others create a new branch
+ if hgchildren[parent][0] == str(cset):
+ hgbranch[str(cset)] = hgbranch[parent]
+ else:
+ hgbranch[str(cset)] = "branch-" + str(cset)
+
+if not hgvers.has_key("0"):
+ print 'creating repository'
+ os.system('git init')
+
+# loop through every hg changeset
+for cset in range(int(tip) + 1):
+
+ # incremental, already seen
+ if hgvers.has_key(str(cset)):
+ continue
+ hgnewcsets += 1
+
+ # get info
+ log_data = os.popen('hg log -r %d --template "{tags}\n{date|date}\n{author}\n"' % cset).readlines()
+ tag = log_data[0].strip()
+ date = log_data[1].strip()
+ user = log_data[2].strip()
+ parent = hgparents[str(cset)][0]
+ mparent = hgparents[str(cset)][1]
+
+ #get comment
+ (fdcomment, filecomment) = tempfile.mkstemp()
+ csetcomment = os.popen('hg log -r %d --template "{desc}"' % cset).read().strip()
+ os.write(fdcomment, csetcomment)
+ os.close(fdcomment)
+
+ print '-----------------------------------------'
+ print 'cset:', cset
+ print 'branch:', hgbranch[str(cset)]
+ print 'user:', user
+ print 'date:', date
+ print 'comment:', csetcomment
+ if parent:
+ print 'parent:', parent
+ if mparent:
+ print 'mparent:', mparent
+ if tag:
+ print 'tag:', tag
+ print '-----------------------------------------'
+
+ # checkout the parent if necessary
+ if cset != 0:
+ if hgbranch[str(cset)] == "branch-" + str(cset):
+ print 'creating new branch', hgbranch[str(cset)]
+ os.system('git checkout -b %s %s' % (hgbranch[str(cset)], hgvers[parent]))
+ else:
+ print 'checking out branch', hgbranch[str(cset)]
+ os.system('git checkout %s' % hgbranch[str(cset)])
+
+ # merge
+ if mparent:
+ if hgbranch[parent] == hgbranch[str(cset)]:
+ otherbranch = hgbranch[mparent]
+ else:
+ otherbranch = hgbranch[parent]
+ print 'merging', otherbranch, 'into', hgbranch[str(cset)]
+ os.system(getgitenv(user, date) + 'git merge --no-commit -s ours "" %s %s' % (hgbranch[str(cset)], otherbranch))
+
+ # remove everything except .git and .hg directories
+ os.system('find . \( -path "./.hg" -o -path "./.git" \) -prune -o ! -name "." -print | xargs rm -rf')
+
+ # repopulate with checkouted files
+ os.system('hg update -C %d' % cset)
+
+ # add new files
+ os.system('git ls-files -x .hg --others | git update-index --add --stdin')
+ # delete removed files
+ os.system('git ls-files -x .hg --deleted | git update-index --remove --stdin')
+
+ # commit
+ os.system(getgitenv(user, date) + 'git commit --allow-empty -a -F %s' % filecomment)
+ os.unlink(filecomment)
+
+ # tag
+ if tag and tag != 'tip':
+ os.system(getgitenv(user, date) + 'git tag %s' % tag)
+
+ # delete branch if not used anymore...
+ if mparent and len(hgchildren[str(cset)]):
+ print "Deleting unused branch:", otherbranch
+ os.system('git branch -d %s' % otherbranch)
+
+ # retrieve and record the version
+ vvv = os.popen('git show --quiet --pretty=format:%H').read()
+ print 'record', cset, '->', vvv
+ hgvers[str(cset)] = vvv
+
+if hgnewcsets >= opt_nrepack and opt_nrepack != -1:
+ os.system('git repack -a -d')
+
+# write the state for incrementals
+if state:
+ if verbose:
+ print 'Writing state'
+ f = open(state, 'w')
+ pickle.dump(hgvers, f)
+
+# vim: et ts=8 sw=4 sts=4
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 07:30:13 +0000