##// END OF EJS Templates
git -> hg conversion script...
git -> hg conversion script contrib/convert-repo changes: - do not print verbose output so that error messages are seen more easily - Output the date as integer and not as floating point number. - Do not require a ".git" subdirectory to work on, but use the GIT_DIR environment var to specify the git repository. Change is otherwise compatible to the current version and I have tested it by converting the kernel and several git respositories from kernel.org. (Btw, the udev test dir contains a /sys dir with entries which should not be normal dirs and not be normal files. ;-) Thanks again for mercurial, Florian La Roche --- a/contrib/convert-repo +++ b/contrib/convert-repo @@ -28,26 +28,18 @@ self.path = path def getheads(self): - h = file(self.path + "/.git/HEAD").read()[:-1] - return [h] + return [file(self.path + "/HEAD").read()[:-1]] def catfile(self, rev, type): if rev == "0" * 40: raise IOError() - path = os.getcwd() - os.chdir(self.path) - fh = os.popen("git-cat-file %s %s 2>/dev/null" % (type, rev)) - os.chdir(path) + 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): - path = os.getcwd() - os.chdir(self.path) - fh = os.popen("git-diff-tree --root -m -r %s" % (version)) - os.chdir(path) - + 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 @@ -83,9 +75,9 @@ def gettags(self): tags = {} - for f in os.listdir(self.path + "/.git/refs/tags"): + for f in os.listdir(self.path + "/refs/tags"): try: - h = file(self.path + "/.git/refs/tags/" + f).read().strip() + h = file(self.path + "/refs/tags/" + f).read().strip() tags[f] = h except: pass @@ -99,8 +91,7 @@ def getheads(self): h = self.repo.changelog.heads() - h = [ hg.hex(x) for x in h ] - return h + return [ hg.hex(x) for x in h ] def putfile(self, f, e, data): self.repo.wfile(f, "w").write(data) @@ -155,12 +146,12 @@ newlines.sort() if newlines != oldlines: - print "updating tags" + #print "updating tags" f = self.repo.wfile(".hgtags", "w") f.write("".join(newlines)) f.close() if not oldlines: self.repo.add([".hgtags"]) - date = "%s 0" % time.mktime(time.gmtime()) + date = "%s 0" % int(time.mktime(time.gmtime())) self.repo.rawcommit([".hgtags"], "update tags", "convert-repo", date, self.repo.changelog.tip(), hg.nullid) @@ -262,7 +253,7 @@ num -= 1 if c in self.map: continue desc = self.commitcache[c][3].splitlines()[0] - print num, desc + #print num, desc self.copy(c) tags = self.source.gettags() @@ -275,6 +266,8 @@ self.dest.puttags(ctags) gitpath, hgpath, mapfile = sys.argv[1:] +if os.path.isdir(gitpath + "/.git"): + gitpath += "/.git" c = convert(convert_git(gitpath), convert_mercurial(hgpath), mapfile) c.convert() _______________________________________________ Mercurial mailing list Mercurial@selenic.com http://selenic.com/mailman/listinfo/mercurial

File last commit:

r1335:bea6356b default
r1335:bea6356b default
Show More
convert-repo
273 lines | 7.9 KiB | text/plain | TextLexer
#!/usr/bin/env python
#
# This is a generalized framework for converting between SCM
# repository formats.
#
# In its current form, it's hardcoded to convert incrementally between
# git and Mercurial.
#
# To use, you must first import the first git version into Mercurial,
# and establish a mapping between the git commit hash and the hash in
# Mercurial for that version. This mapping is kept in a simple text
# file with lines like so:
#
# <git hash> <mercurial hash>
#
# To convert the rest of the repo, run:
#
# convert-repo <git-dir> <hg-dir> <mapfile>
#
# This updates the mapfile on each commit copied, so it can be
# interrupted and can be run repeatedly to copy new commits.
import sys, os, zlib, sha, time
from mercurial import hg, ui, util
class convert_git:
def __init__(self, path):
self.path = path
def getheads(self):
return [file(self.path + "/HEAD").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:]
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()
date = " ".join(p[-2:])
author = " ".join(p[:-2])
if author[0] == "<": author = author[1:-1]
if n == "committer":
p = v.split()
date = " ".join(p[-2:])
committer = " ".join(p[:-2])
if committer[0] == "<": committer = committer[1:-1]
message += "\ncommitter: %s %s\n" % (committer, date)
if n == "parent": parents.append(v)
return (parents, author, date, message)
def gettags(self):
tags = {}
for f in os.listdir(self.path + "/refs/tags"):
try:
h = file(self.path + "/refs/tags/" + f).read().strip()
tags[f] = h
except:
pass
return tags
class convert_mercurial:
def __init__(self, path):
self.path = path
u = ui.ui()
self.repo = hg.repository(u, path)
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, author, dest, text):
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)
while parents:
p1 = p2
p2 = parents.pop(0)
self.repo.rawcommit(files, text, author, dest,
hg.bin(p1), hg.bin(p2))
text = "(octopus merge fixup)\n"
return hg.hex(self.repo.changelog.tip())
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:
#print "updating tags"
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)
class convert:
def __init__(self, source, dest, mapfile):
self.source = source
self.dest = dest
self.mapfile = mapfile
self.commitcache = {}
self.map = {}
for l in file(self.mapfile):
sv, dv = l[:-1].split()
self.map[sv] = dv
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][0]
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):
p, a, d, t = 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 p]
f = [f for f,v,e in files]
self.map[rev] = self.dest.putcommit(f, r, a, d, t)
file(self.mapfile, "a").write("%s %s\n" % (rev, self.map[rev]))
def convert(self):
heads = self.source.getheads()
parents = self.walktree(heads)
t = self.toposort(parents)
num = len(t)
for c in t:
num -= 1
if c in self.map: continue
desc = self.commitcache[c][3].splitlines()[0]
#print 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]
self.dest.puttags(ctags)
gitpath, hgpath, mapfile = sys.argv[1:]
if os.path.isdir(gitpath + "/.git"):
gitpath += "/.git"
c = convert(convert_git(gitpath), convert_mercurial(hgpath), mapfile)
c.convert()