# 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 mercurial_source, mercurial_sink
from subversion import convert_svn
import os, shlex, shutil
from mercurial import hg, ui, util, commands
from mercurial.i18n import _
commands.norepo += " convert"
converters = [convert_cvs, convert_git, convert_svn, mercurial_source,
mercurial_sink]
def convertsource(ui, path, **opts):
for c in converters:
try:
return c.getcommit and c(ui, path, **opts)
except (AttributeError, 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:
try:
return c.putcommit and c(ui, path)
except (AttributeError, NoRepo):
pass
raise util.Abort('%s: unknown repository type' % path)
class convert(object):
def __init__(self, ui, source, dest, revmapfile, filemapper, opts):
self.source = source
self.dest = dest
self.ui = ui
self.opts = opts
self.commitcache = {}
self.revmapfile = revmapfile
self.revmapfilefd = None
self.authors = {}
self.authorfile = None
self.mapfile = filemapper
self.map = {}
try:
origrevmapfile = open(self.revmapfile, 'r')
for l in origrevmapfile:
sv, dv = l[:-1].split()
self.map[sv] = dv
origrevmapfile.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.revmapfilefd is None:
try:
self.revmapfilefd = open(self.revmapfile, "a")
except IOError, (errno, strerror):
raise util.Abort("Could not open map file %s: %s, %s\n" % (self.revmapfile, errno, strerror))
self.map[src] = dst
self.revmapfilefd.write("%s %s\n" % (src, dst))
self.revmapfilefd.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):
commit = self.commitcache[rev]
do_copies = hasattr(self.dest, 'copyfile')
filenames = []
for f, v in self.source.getchanges(rev):
newf = self.mapfile(f)
if not newf:
continue
filenames.append(newf)
try:
data = self.source.getfile(f, v)
except IOError, inst:
self.dest.delfile(newf)
else:
e = self.source.getmode(f, v)
self.dest.putfile(newf, e, data)
if do_copies:
if f in commit.copies:
copyf = self.mapfile(commit.copies[f])
if copyf:
# Merely marks that a copy happened.
self.dest.copyfile(copyf, newf)
parents = [self.map[r] for r in commit.parents]
newnode = self.dest.putcommit(filenames, parents, commit)
self.mapentry(rev, newnode)
def convert(self):
try:
self.dest.before()
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):
self.dest.after()
if self.revmapfilefd:
self.revmapfilefd.close()
def rpairs(name):
e = len(name)
while e != -1:
yield name[:e], name[e+1:]
e = name.rfind('/', 0, e)
class filemapper(object):
'''Map and filter filenames when importing.
A name can be mapped to itself, a new name, or None (omit from new
repository).'''
def __init__(self, ui, path=None):
self.ui = ui
self.include = {}
self.exclude = {}
self.rename = {}
if path:
if self.parse(path):
raise util.Abort(_('errors in filemap'))
def parse(self, path):
errs = 0
def check(name, mapping, listname):
if name in mapping:
self.ui.warn(_('%s:%d: %r already in %s list\n') %
(lex.infile, lex.lineno, name, listname))
return 1
return 0
lex = shlex.shlex(open(path), path, True)
lex.wordchars += '!@#$%^&*()-=+[]{}|;:,./<>?'
cmd = lex.get_token()
while cmd:
if cmd == 'include':
name = lex.get_token()
errs += check(name, self.exclude, 'exclude')
self.include[name] = name
elif cmd == 'exclude':
name = lex.get_token()
errs += check(name, self.include, 'include')
errs += check(name, self.rename, 'rename')
self.exclude[name] = name
elif cmd == 'rename':
src = lex.get_token()
dest = lex.get_token()
errs += check(src, self.exclude, 'exclude')
self.rename[src] = dest
elif cmd == 'source':
errs += self.parse(lex.get_token())
else:
self.ui.warn(_('%s:%d: unknown directive %r\n') %
(lex.infile, lex.lineno, cmd))
errs += 1
cmd = lex.get_token()
return errs
def lookup(self, name, mapping):
for pre, suf in rpairs(name):
try:
return mapping[pre], pre, suf
except KeyError, err:
pass
return '', name, ''
def __call__(self, name):
if self.include:
inc = self.lookup(name, self.include)[0]
else:
inc = name
if self.exclude:
exc = self.lookup(name, self.exclude)[0]
else:
exc = ''
if not inc or exc:
return None
newpre, pre, suf = self.lookup(name, self.rename)
if newpre:
if suf:
return newpre + '/' + suf
return newpre
return name
def _convert(ui, src, dest=None, revmapfile=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 no destination directory name is specified, it defaults to the
basename of the source with '-hg' appended. If the destination
repository doesn't exist, it will be created.
If <revmapfile> isn't given, it will be put in a default location
(<dest>/.hg/shamap by default). The <revmapfile> 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
"""
util._encoding = 'UTF-8'
if not dest:
dest = hg.defaultdest(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 revmapfile:
try:
revmapfile = destc.revmapfile()
except:
revmapfile = os.path.join(destc, "map")
c = convert(ui, srcc, destc, revmapfile, filemapper(ui, opts['filemap']),
opts)
c.convert()
cmdtable = {
"convert":
(_convert,
[('A', 'authors', '', 'username mapping filename'),
('', 'filemap', '', 'remap file names using contents of file'),
('r', 'rev', '', 'import up to target revision REV'),
('', 'datesort', None, 'try to sort changesets by date')],
'hg convert [OPTION]... SOURCE [DEST [MAPFILE]]'),
}