#!/usr/bin/env python
#
# This is a generalized framework for converting between SCM
# repository formats.
#
# To use, run:
#
# convert-repo <source> [<dest> [<mapfile>]]
#
# Currently accepted source formats: git, cvs
# Currently accepted destination formats: hg
#
# 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.
import sys, os, zlib, sha, time, re, locale
os.environ["HGENCODING"] = "utf-8"
from mercurial import hg, ui, util, fancyopts
class Abort(Exception): pass
class NoRepo(Exception): pass
class commit:
def __init__(self, **parts):
for x in "author date desc parents".split():
if not x in parts:
abort("commit missing field %s\n" % x)
self.__dict__.update(parts)
quiet = 0
def status(msg):
if not quiet: sys.stdout.write(str(msg))
def warn(msg):
sys.stderr.write(str(msg))
def abort(msg):
raise Abort(msg)
def recode(s):
try:
return s.decode("utf-8").encode("utf-8")
except:
try:
return s.decode("latin-1").encode("utf-8")
except:
return s.decode("utf-8", "replace").encode("utf-8")
# CVS conversion code inspired by hg-cvs-import and git-cvsimport
class convert_cvs:
def __init__(self, path):
self.path = path
cvs = os.path.join(path, "CVS")
if not os.path.exists(cvs):
raise NoRepo("couldn't open CVS repo %s" % path)
self.changeset = {}
self.files = {}
self.tags = {}
self.lastbranch = {}
self.parent = {}
self.socket = None
self.cvsroot = file(os.path.join(cvs, "Root")).read()[:-1]
self.cvsrepo = file(os.path.join(cvs, "Repository")).read()[:-1]
self.encoding = locale.getpreferredencoding()
self._parse()
self._connect()
def _parse(self):
if self.changeset:
return
d = os.getcwd()
try:
os.chdir(self.path)
id = None
state = 0
for l in os.popen("cvsps -A"):
if state == 0: # header
if l.startswith("PatchSet"):
id = l[9:-2]
elif l.startswith("Date"):
date = util.parsedate(l[6:-1], ["%Y/%m/%d %H:%M:%S"])
date = util.datestr(date)
elif l.startswith("Branch"):
branch = l[8:-1]
self.parent[id] = self.lastbranch.get(branch,'bad')
self.lastbranch[branch] = id
elif l.startswith("Ancestor branch"):
ancestor = l[17:-1]
self.parent[id] = self.lastbranch[ancestor]
elif l.startswith("Author"):
author = self.recode(l[8:-1])
elif l.startswith("Tag: "):
t = l[5:-1]
if t != "(none) ":
self.tags[t] = id
elif l.startswith("Log:"):
state = 1
log = ""
elif state == 1: # log
if l == "Members: \n":
files = {}
log = self.recode(log[:-1])
if log.isspace():
log = "*** empty log message ***\n"
state = 2
else:
log += l
elif state == 2:
if l == "\n": #
state = 0
p = [self.parent[id]]
if id == "1":
p = []
c = commit(author=author, date=date, parents=p,
desc=log, branch=branch)
self.changeset[id] = c
self.files[id] = files
else:
file,rev = l[1:-2].rsplit(':',1)
rev = rev.split("->")[1]
files[file] = rev
self.heads = self.lastbranch.values()
finally:
os.chdir(d)
def _connect(self):
root = self.cvsroot
local = False
user, host = None, None
cmd = ['cvs', 'server']
status("connecting to %s\n" % root)
# only non-pserver for now
if root.startswith(":pserver"):
abort("can't handle pserver mode yet: %s\n" % root)
if root.startswith(":local:"):
local = True
root = root[7:]
else:
# :ext:user@host/home/user/path/to/cvsroot
if root.startswith(":ext:"):
root = root[5:]
m = re.match(r'(?:([^@:/]+)@)?([^:/]+):?(.*)', root)
if not m:
local = True
else:
local = False
user, host, root = m.group(1), m.group(2), m.group(3)
if not local:
rsh = os.environ.get("CVS_RSH" or "rsh")
if user:
cmd = [rsh, '-l', user, host] + cmd
else:
cmd = [rsh, host] + cmd
self.writep, self.readp = os.popen2(cmd)
self.realroot = root
self.writep.write("Root %s\n" % root)
self.writep.write("Valid-responses ok error Valid-requests Mode"
" M Mbinary E Checked-in Created Updated"
" Merged Removed\n")
self.writep.write("valid-requests\n")
self.writep.flush()
r = self.readp.readline()
if not r.startswith("Valid-requests"):
abort("server sucks\n")
if "UseUnchanged" in r:
self.writep.write("UseUnchanged\n")
self.writep.flush()
r = self.readp.readline()
def getheads(self):
return self.heads
def getfile(self, name, rev):
if rev.endswith("(DEAD)"):
raise IOError
args = ("-N -P -kk -r %s --" % rev).split()
args.append(os.path.join(self.cvsrepo, name))
for x in args:
self.writep.write("Argument %s\n" % x)
self.writep.write("Directory .\n%s\nco\n" % self.realroot)
self.writep.flush()
data = ""
while 1:
line = self.readp.readline()
if line.startswith("Created ") or line.startswith("Updated "):
self.readp.readline() # path
self.readp.readline() # entries
mode = self.readp.readline()[:-1]
count = int(self.readp.readline()[:-1])
data = self.readp.read(count)
elif line.startswith(" "):
data += line[1:]
elif line.startswith("M "):
pass
elif line.startswith("Mbinary "):
count = int(self.readp.readline()[:-1])
data = self.readp.read(count)
else:
if line == "ok\n":
return data
elif line.startswith("E "):
warn("cvs server: %s\n" % line[2:])
elif line.startswith("Remove"):
l = self.readp.readline()
l = self.readp.readline()
if l != "ok\n":
abort("unknown CVS response: %s\n" % l)
else:
abort("unknown CVS response: %s\n" % line)
def getchanges(self, rev):
files = self.files[rev]
cl = [ (f, r, 0) for f,r in files.items() ]
cl.sort()
return cl
def recode(self, text):
return text.decode(self.encoding, "replace").encode("utf-8")
def getcommit(self, rev):
return self.changeset[rev]
def gettags(self):
return self.tags
class convert_git:
def __init__(self, path):
if os.path.isdir(path + "/.git"):
path += "/.git"
self.path = path
if not os.path.exists(path + "/HEAD"):
raise NoRepo("couldn't open GIT repo %s" % path)
def getheads(self):
fh = os.popen("GIT_DIR=%s git-rev-parse --verify HEAD" % self.path)
return [fh.read()[:-1]]
def catfile(self, rev, type):
if rev == "0" * 40: raise IOError()
fh = os.popen("GIT_DIR=%s git-cat-file %s %s 2>/dev/null" % (self.path, type, rev))
return fh.read()
def getfile(self, name, rev):
return self.catfile(rev, "blob")
def getchanges(self, version):
fh = os.popen("GIT_DIR=%s git-diff-tree --root -m -r %s" % (self.path, version))
changes = []
for l in fh:
if "\t" not in l: continue
m, f = l[:-1].split("\t")
m = m.split()
h = m[3]
p = (m[1] == "100755")
changes.append((f, h, p))
return changes
def getcommit(self, version):
c = self.catfile(version, "commit") # read the commit hash
end = c.find("\n\n")
message = c[end+2:]
message = recode(message)
l = c[:end].splitlines()
manifest = l[0].split()[1]
parents = []
for e in l[1:]:
n,v = e.split(" ", 1)
if n == "author":
p = v.split()
tm, tz = p[-2:]
author = " ".join(p[:-2])
if author[0] == "<": author = author[1:-1]
author = recode(author)
if n == "committer":
p = v.split()
tm, tz = p[-2:]
committer = " ".join(p[:-2])
if committer[0] == "<": committer = committer[1:-1]
committer = recode(committer)
message += "\ncommitter: %s\n" % committer
if n == "parent": parents.append(v)
tzs, tzh, tzm = tz[-5:-4] + "1", tz[-4:-2], tz[-2:]
tz = -int(tzs) * (int(tzh) * 3600 + int(tzm))
date = tm + " " + str(tz)
c = commit(parents=parents, date=date, author=author, desc=message)
return c
def gettags(self):
tags = {}
for f in os.listdir(self.path + "/refs/tags"):
try:
h = file(self.path + "/refs/tags/" + f).read().strip()
c = self.catfile(h, "tag") # read the commit hash
h = c.splitlines()[0].split()[1]
tags[f] = h
except:
pass
return tags
class convert_mercurial:
def __init__(self, path):
self.path = path
u = ui.ui()
try:
self.repo = hg.repository(u, path)
except:
raise NoRepo("could open hg repo %s" % path)
def mapfile(self):
return os.path.join(self.path, ".hg", "shamap")
def getheads(self):
h = self.repo.changelog.heads()
return [ hg.hex(x) for x in h ]
def putfile(self, f, e, data):
self.repo.wfile(f, "w").write(data)
if self.repo.dirstate.state(f) == '?':
self.repo.dirstate.update([f], "a")
util.set_exec(self.repo.wjoin(f), e)
def delfile(self, f):
try:
os.unlink(self.repo.wjoin(f))
#self.repo.remove([f])
except:
pass
def putcommit(self, files, parents, commit):
seen = {}
pl = []
for p in parents:
if p not in seen:
pl.append(p)
seen[p] = 1
parents = pl
if len(parents) < 2: parents.append("0" * 40)
if len(parents) < 2: parents.append("0" * 40)
p2 = parents.pop(0)
text = commit.desc
extra = {}
try:
extra["branch"] = commit.branch
except AttributeError:
pass
while parents:
p1 = p2
p2 = parents.pop(0)
a = self.repo.rawcommit(files, text, commit.author, commit.date,
hg.bin(p1), hg.bin(p2), extra=extra)
text = "(octopus merge fixup)\n"
p2 = hg.hex(self.repo.changelog.tip())
return p2
def puttags(self, tags):
try:
old = self.repo.wfile(".hgtags").read()
oldlines = old.splitlines(1)
oldlines.sort()
except:
oldlines = []
k = tags.keys()
k.sort()
newlines = []
for tag in k:
newlines.append("%s %s\n" % (tags[tag], tag))
newlines.sort()
if newlines != oldlines:
status("updating tags\n")
f = self.repo.wfile(".hgtags", "w")
f.write("".join(newlines))
f.close()
if not oldlines: self.repo.add([".hgtags"])
date = "%s 0" % int(time.mktime(time.gmtime()))
self.repo.rawcommit([".hgtags"], "update tags", "convert-repo",
date, self.repo.changelog.tip(), hg.nullid)
return hg.hex(self.repo.changelog.tip())
converters = [convert_cvs, convert_git, convert_mercurial]
def converter(path):
if not os.path.isdir(path):
abort("%s: not a directory\n" % path)
for c in converters:
try:
return c(path)
except NoRepo:
pass
abort("%s: unknown repository type\n" % path)
class convert:
def __init__(self, source, dest, mapfile):
self.source = source
self.dest = dest
self.mapfile = mapfile
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
s.append(n)
if n in children:
for c in children[n]:
visit.insert(0, c)
return s
def copy(self, rev):
c = self.commitcache[rev]
files = self.source.getchanges(rev)
for f,v,e in files:
try:
data = self.source.getfile(f, v)
except IOError, inst:
self.dest.delfile(f)
else:
self.dest.putfile(f, e, data)
r = [self.map[v] for v in c.parents]
f = [f for f,v,e 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):
status("scanning source...\n")
heads = self.source.getheads()
parents = self.walktree(heads)
status("sorting...\n")
t = self.toposort(parents)
t = [n for n in t if n not in self.map]
num = len(t)
c = None
status("converting...\n")
for c in t:
num -= 1
desc = self.commitcache[c].desc
if "\n" in desc:
desc = desc.splitlines()[0]
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 command(src, dest=None, mapfile=None, **opts):
srcc = converter(src)
if not hasattr(srcc, "getcommit"):
abort("%s: can't read from this repo type\n" % src)
if not dest:
dest = src + "-hg"
status("assuming destination %s\n" % dest)
if not os.path.isdir(dest):
status("creating repository %s\n" % dest)
os.system("hg init " + dest)
destc = converter(dest)
if not hasattr(destc, "putcommit"):
abort("%s: can't write to this repo type\n" % src)
if not mapfile:
try:
mapfile = destc.mapfile()
except:
mapfile = os.path.join(destc, "map")
c = convert(srcc, destc, mapfile)
c.convert()
options = [('q', 'quiet', None, 'suppress output')]
opts = {}
args = fancyopts.fancyopts(sys.argv[1:], options, opts)
if opts['quiet']:
quiet = 1
try:
command(*args, **opts)
except Abort, inst:
warn(inst)
except KeyboardInterrupt:
status("interrupted\n")