convert: export revmap to source.
Sources may be able to use it to optimise their own log fetching
# convert.py Foreign SCM converter
#
# Copyright 2005-2007 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, converter_source, converter_sink
from cvs import convert_cvs
from git import convert_git
from hg import convert_mercurial
from subversion import convert_svn
import os, shutil
from mercurial import hg, ui, util, commands
commands.norepo += " convert"
converters = [convert_cvs, convert_git, convert_svn, convert_mercurial]
def convertsource(ui, path, **opts):
for c in converters:
if not hasattr(c, 'getcommit'):
continue
try:
return c(ui, path, **opts)
except NoRepo:
pass
raise util.Abort('%s: unknown repository type' % path)
def convertsink(ui, path):
if not os.path.isdir(path):
raise util.Abort("%s: not a directory" % path)
for c in converters:
if not hasattr(c, 'putcommit'):
continue
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.opts = opts
self.commitcache = {}
self.mapfile = mapfile
self.mapfilefd = None
self.authors = {}
self.authorfile = None
self.map = {}
try:
origmapfile = open(self.mapfile, 'r')
for l in origmapfile:
sv, dv = l[:-1].split()
self.map[sv] = dv
origmapfile.close()
except IOError:
pass
# Read first the dst author map if any
authorfile = self.dest.authorfile()
if authorfile and os.path.exists(authorfile):
self.readauthormap(authorfile)
# Extend/Override with new author map if necessary
if opts.get('authors'):
self.readauthormap(opts.get('authors'))
self.authorfile = self.dest.authorfile()
def walktree(self, heads):
'''Return a mapping that identifies the uncommitted parents of every
uncommitted changeset.'''
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
parents[n] = []
for p in cp:
parents[n].append(p)
visit.append(p)
return parents
def toposort(self, parents):
'''Return an ordering such that every uncommitted changeset is
preceeded by all its uncommitted ancestors.'''
visit = parents.keys()
seen = {}
children = {}
while visit:
n = visit.pop(0)
if n in seen: continue
seen[n] = 1
# Ensure that nodes without parents are present in the 'children'
# mapping.
children.setdefault(n, [])
for p in parents[n]:
if not p in self.map:
visit.append(p)
children.setdefault(p, []).append(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 mapentry(self, src, dst):
if self.mapfilefd is None:
try:
self.mapfilefd = open(self.mapfile, "a")
except IOError, (errno, strerror):
raise util.Abort("Could not open map file %s: %s, %s\n" % (self.mapfile, errno, strerror))
self.map[src] = dst
self.mapfilefd.write("%s %s\n" % (src, dst))
self.mapfilefd.flush()
def writeauthormap(self):
authorfile = self.authorfile
if authorfile:
self.ui.status('Writing author map file %s\n' % authorfile)
ofile = open(authorfile, 'w+')
for author in self.authors:
ofile.write("%s=%s\n" % (author, self.authors[author]))
ofile.close()
def readauthormap(self, authorfile):
afile = open(authorfile, 'r')
for line in afile:
try:
srcauthor = line.split('=')[0].strip()
dstauthor = line.split('=')[1].strip()
if srcauthor in self.authors and dstauthor != self.authors[srcauthor]:
self.ui.status(
'Overriding mapping for author %s, was %s, will be %s\n'
% (srcauthor, self.authors[srcauthor], dstauthor))
else:
self.ui.debug('Mapping author %s to %s\n'
% (srcauthor, dstauthor))
self.authors[srcauthor] = dstauthor
except IndexError:
self.ui.warn(
'Ignoring bad line in author file map %s: %s\n'
% (authorfile, line))
afile.close()
def copy(self, rev):
c = self.commitcache[rev]
files = self.source.getchanges(rev)
do_copies = (hasattr(c, 'copies') and hasattr(self.dest, 'copyfile'))
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)
if do_copies:
if f in c.copies:
# Merely marks that a copy happened.
self.dest.copyfile(c.copies[f], f)
r = [self.map[v] for v in c.parents]
f = [f for f, v in files]
newnode = self.dest.putcommit(f, r, c)
self.mapentry(rev, newnode)
def convert(self):
try:
self.source.setrevmap(self.map)
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]
author = self.commitcache[c].author
author = self.authors.get(author, author)
self.commitcache[c].author = author
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:
self.mapentry(c, nrev)
self.writeauthormap()
finally:
self.cleanup()
def cleanup(self):
if self.mapfilefd:
self.mapfilefd.close()
def _convert(ui, src, dest=None, mapfile=None, **opts):
'''Convert a foreign SCM repository to a Mercurial one.
Accepted source formats:
- GIT
- CVS
- SVN
Accepted destination formats:
- Mercurial
If no revision is given, all revisions will be converted. Otherwise,
convert will only import up to the named revision (given in a format
understood by the source).
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.
The [username mapping] file is a simple text file that maps each source
commit author to a destination commit author. It is handy for source SCMs
that use unix logins to identify authors (eg: CVS). One line per author
mapping and the line format is:
srcauthor=whatever string you want
'''
if not dest:
dest = src + "-hg"
ui.status("assuming destination %s\n" % dest)
# Try to be smart and initalize things when required
created = False
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)
created = 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)
created = True
destc = convertsink(ui, dest)
try:
srcc = convertsource(ui, src, rev=opts.get('rev'))
except Exception:
if created:
shutil.rmtree(dest, True)
raise
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,
[('A', 'authors', '', 'username mapping filename'),
('r', 'rev', '', 'import up to target revision REV'),
('', 'datesort', None, 'try to sort changesets by date')],
'hg convert [OPTION]... SOURCE [DEST [MAPFILE]]'),
}