# convert.py Foreign SCM converter
#
# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
from common import NoRepo
from cvs import convert_cvs
from git import convert_git
from hg import convert_mercurial
import os
from mercurial import hg, ui, util, commands
commands.norepo += " convert"
converters = [convert_cvs, convert_git, convert_mercurial]
def converter(ui, path):
if not os.path.isdir(path):
raise util.Abort("%s: not a directory" % path)
for c in converters:
try:
return c(ui, path)
except NoRepo:
pass
raise util.Abort("%s: unknown repository type" % path)
class convert(object):
def __init__(self, ui, source, dest, mapfile, opts):
self.source = source
self.dest = dest
self.ui = ui
self.mapfile = mapfile
self.opts = opts
self.commitcache = {}
self.map = {}
try:
for l in file(self.mapfile):
sv, dv = l[:-1].split()
self.map[sv] = dv
except IOError:
pass
def walktree(self, heads):
visit = heads
known = {}
parents = {}
while visit:
n = visit.pop(0)
if n in known or n in self.map: continue
known[n] = 1
self.commitcache[n] = self.source.getcommit(n)
cp = self.commitcache[n].parents
for p in cp:
parents.setdefault(n, []).append(p)
visit.append(p)
return parents
def toposort(self, parents):
visit = parents.keys()
seen = {}
children = {}
while visit:
n = visit.pop(0)
if n in seen: continue
seen[n] = 1
pc = 0
if n in parents:
for p in parents[n]:
if p not in self.map: pc += 1
visit.append(p)
children.setdefault(p, []).append(n)
if not pc: root = n
s = []
removed = {}
visit = children.keys()
while visit:
n = visit.pop(0)
if n in removed: continue
dep = 0
if n in parents:
for p in parents[n]:
if p in self.map: continue
if p not in removed:
# we're still dependent
visit.append(n)
dep = 1
break
if not dep:
# all n's parents are in the list
removed[n] = 1
if n not in self.map:
s.append(n)
if n in children:
for c in children[n]:
visit.insert(0, c)
if self.opts.get('datesort'):
depth = {}
for n in s:
depth[n] = 0
pl = [p for p in self.commitcache[n].parents
if p not in self.map]
if pl:
depth[n] = max([depth[p] for p in pl]) + 1
s = [(depth[n], self.commitcache[n].date, n) for n in s]
s.sort()
s = [e[2] for e in s]
return s
def copy(self, rev):
c = self.commitcache[rev]
files = self.source.getchanges(rev)
for f, v in files:
try:
data = self.source.getfile(f, v)
except IOError, inst:
self.dest.delfile(f)
else:
e = self.source.getmode(f, v)
self.dest.putfile(f, e, data)
r = [self.map[v] for v in c.parents]
f = [f for f, v in files]
self.map[rev] = self.dest.putcommit(f, r, c)
file(self.mapfile, "a").write("%s %s\n" % (rev, self.map[rev]))
def convert(self):
self.ui.status("scanning source...\n")
heads = self.source.getheads()
parents = self.walktree(heads)
self.ui.status("sorting...\n")
t = self.toposort(parents)
num = len(t)
c = None
self.ui.status("converting...\n")
for c in t:
num -= 1
desc = self.commitcache[c].desc
if "\n" in desc:
desc = desc.splitlines()[0]
self.ui.status("%d %s\n" % (num, desc))
self.copy(c)
tags = self.source.gettags()
ctags = {}
for k in tags:
v = tags[k]
if v in self.map:
ctags[k] = self.map[v]
if c and ctags:
nrev = self.dest.puttags(ctags)
# write another hash correspondence to override the previous
# one so we don't end up with extra tag heads
if nrev:
file(self.mapfile, "a").write("%s %s\n" % (c, nrev))
def _convert(ui, src, dest=None, mapfile=None, **opts):
'''Convert a foreign SCM repository to a Mercurial one.
Accepted source formats:
- GIT
- CVS
Accepted destination formats:
- Mercurial
If destination isn't given, a new Mercurial repo named <src>-hg will
be created. If <mapfile> isn't given, it will be put in a default
location (<dest>/.hg/shamap by default)
The <mapfile> is a simple text file that maps each source commit ID to
the destination ID for that revision, like so:
<source ID> <destination ID>
If the file doesn't exist, it's automatically created. It's updated
on each commit copied, so convert-repo can be interrupted and can
be run repeatedly to copy new commits.
'''
srcc = converter(ui, src)
if not hasattr(srcc, "getcommit"):
raise util.Abort("%s: can't read from this repo type" % src)
if not dest:
dest = src + "-hg"
ui.status("assuming destination %s\n" % dest)
# Try to be smart and initalize things when required
if os.path.isdir(dest):
if len(os.listdir(dest)) > 0:
try:
hg.repository(ui, dest)
ui.status("destination %s is a Mercurial repository\n" % dest)
except hg.RepoError:
raise util.Abort(
"destination directory %s is not empty.\n"
"Please specify an empty directory to be initialized\n"
"or an already initialized mercurial repository"
% dest)
else:
ui.status("initializing destination %s repository\n" % dest)
hg.repository(ui, dest, create=True)
elif os.path.exists(dest):
raise util.Abort("destination %s exists and is not a directory" % dest)
else:
ui.status("initializing destination %s repository\n" % dest)
hg.repository(ui, dest, create=True)
destc = converter(ui, dest)
if not hasattr(destc, "putcommit"):
raise util.Abort("%s: can't write to this repo type" % src)
if not mapfile:
try:
mapfile = destc.mapfile()
except:
mapfile = os.path.join(destc, "map")
c = convert(ui, srcc, destc, mapfile, opts)
c.convert()
cmdtable = {
"convert":
(_convert,
[('', 'datesort', None, 'try to sort changesets by date')],
'hg convert [OPTION]... SOURCE [DEST [MAPFILE]]'),
}