Add some more smart when initializing destination repository

hgext/convert/__init__.py

@@ -1,724 +1,743 b''
 # convert.py Foreign SCM converter
 #
 # Copyright 2005, 2006 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 
 import sys, os, zlib, sha, time, re, locale, socket
-from mercurial import hg, ui, util, commands
+from mercurial import hg, ui, util, commands, repo
 
 commands.norepo += " convert"
 
 class NoRepo(Exception): pass
 
 class commit(object):
     def __init__(self, **parts):
         for x in "author date desc parents".split():
             if not x in parts:
                 raise util.Abort("commit missing field %s\n" % x)
         self.__dict__.update(parts)
 
 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")
 
 class converter_source(object):
     """Conversion source interface"""
 
     def __init__(self, ui, path):
         """Initialize conversion source (or raise NoRepo("message")
         exception if path is not a valid repository)"""
         raise NotImplementedError()
 
     def getheads(self):
         """Return a list of this repository's heads"""
         raise NotImplementedError()
 
     def getfile(self, name, rev):
         """Return file contents as a string"""
         raise NotImplementedError()
 
     def getmode(self, name, rev):
         """Return file mode, eg. '', 'x', or 'l'"""
         raise NotImplementedError()
 
     def getchanges(self, version):
         """Return sorted list of (filename, id) tuples for all files changed in rev.
 
         id just tells us which revision to return in getfile(), e.g. in
         git it's an object hash."""
         raise NotImplementedError()
 
     def getcommit(self, version):
         """Return the commit object for version"""
         raise NotImplementedError()
 
     def gettags(self):
         """Return the tags as a dictionary of name: revision"""
         raise NotImplementedError()
 
 class converter_sink(object):
     """Conversion sink (target) interface"""
 
     def __init__(self, ui, path):
         """Initialize conversion sink (or raise NoRepo("message")
         exception if path is not a valid repository)"""
         raise NotImplementedError()
 
     def getheads(self):
         """Return a list of this repository's heads"""
         raise NotImplementedError()
 
     def mapfile(self):
         """Path to a file that will contain lines
         source_rev_id sink_rev_id
         mapping equivalent revision identifiers for each system."""
         raise NotImplementedError()
 
     def putfile(self, f, e, data):
         """Put file for next putcommit().
         f: path to file
         e: '', 'x', or 'l' (regular file, executable, or symlink)
         data: file contents"""
         raise NotImplementedError()
 
     def delfile(self, f):
         """Delete file for next putcommit().
         f: path to file"""
         raise NotImplementedError()
 
     def putcommit(self, files, parents, commit):
         """Create a revision with all changed files listed in 'files'
         and having listed parents. 'commit' is a commit object containing
         at a minimum the author, date, and message for this changeset.
         Called after putfile() and delfile() calls. Note that the sink
         repository is not told to update itself to a particular revision
         (or even what that revision would be) before it receives the
         file data."""
         raise NotImplementedError()
 
     def puttags(self, tags):
         """Put tags into sink.
         tags: {tagname: sink_rev_id, ...}"""
         raise NotImplementedError()
 
 
 # CVS conversion code inspired by hg-cvs-import and git-cvsimport
 class convert_cvs(converter_source):
     def __init__(self, ui, path):
         self.path = path
         self.ui = ui
         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 -u --cvs-direct -q"):
                 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].rstrip()
                         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 = []
                         if branch == "HEAD":
                             branch = ""
                         c = commit(author=author, date=date, parents=p,
                                    desc=log, branch=branch)
                         self.changeset[id] = c
                         self.files[id] = files
                     else:
                         colon = l.rfind(':')
                         file = l[1:colon]
                         rev = l[colon+1:-2]
                         rev = rev.split("->")[1]
                         files[file] = rev
 
             self.heads = self.lastbranch.values()
         finally:
             os.chdir(d)
 
     def _connect(self):
         root = self.cvsroot
         conntype = None
         user, host = None, None
         cmd = ['cvs', 'server']
 
         self.ui.status("connecting to %s\n" % root)
 
         if root.startswith(":pserver:"):
             root = root[9:]
             m = re.match(r'(?:(.*?)(?::(.*?))?@)?([^:\/]*)(?::(\d*))?(.*)', root)
             if m:
                 conntype = "pserver"
                 user, passw, serv, port, root = m.groups()
                 if not user:
                     user = "anonymous"
                 rr = ":pserver:" + user + "@" + serv + ":" +  root
                 if port:
                     rr2, port = "-", int(port)
                 else:
                     rr2, port = rr, 2401
                 rr += str(port)
 
                 if not passw:
                     passw = "A"
                     pf = open(os.path.join(os.environ["HOME"], ".cvspass"))
                     for l in pf:
                         # :pserver:[e-mail]:/cvsroot/zmailer Ah<Z
                         m = re.match(r'(/\d+\s+/)?(.*)', l)
                         l = m.group(2)
                         w, p = l.split(' ', 1)
                         if w in [rr, rr2]:
                             passw = p
                             break
                     pf.close()
 
                 sck = socket.socket()
                 sck.connect((serv, port))
                 sck.send("\n".join(["BEGIN AUTH REQUEST", root, user, passw, "END AUTH REQUEST", ""]))
                 if sck.recv(128) != "I LOVE YOU\n":
                     raise NoRepo("CVS pserver authentication failed")
 
                 self.writep = self.readp = sck.makefile('r+')
 
         if not conntype and root.startswith(":local:"):
             conntype = "local"
             root = root[7:]
 
         if not conntype:
             # :ext:user@host/home/user/path/to/cvsroot
             if root.startswith(":ext:"):
                 root = root[5:]
             m = re.match(r'(?:([^@:/]+)@)?([^:/]+):?(.*)', root)
             if not m:
                 conntype = "local"
             else:
                 conntype = "rsh"
                 user, host, root = m.group(1), m.group(2), m.group(3)
 
         if conntype != "pserver":
             if conntype == "rsh":
                 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"):
             raise util.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, "x" in mode and "x" or "")
                 elif line.startswith("E "):
                     self.ui.warn("cvs server: %s\n" % line[2:])
                 elif line.startswith("Remove"):
                     l = self.readp.readline()
                     l = self.readp.readline()
                     if l != "ok\n":
                         raise util.Abort("unknown CVS response: %s\n" % l)
                 else:
                     raise util.Abort("unknown CVS response: %s\n" % line)
 
     def getfile(self, file, rev):
         data, mode = self._getfile(file, rev)
         self.modecache[(file, rev)] = mode
         return data
 
     def getmode(self, file, rev):
         return self.modecache[(file, rev)]
 
     def getchanges(self, rev):
         self.modecache = {}
         files = self.files[rev]
         cl = 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(converter_source):
     def __init__(self, ui, path):
         if os.path.isdir(path + "/.git"):
             path += "/.git"
         self.path = path
         self.ui = ui
         if not os.path.exists(path + "/objects"):
             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 getmode(self, name, rev):
         return self.modecache[(name, rev)]
 
     def getchanges(self, version):
         self.modecache = {}
         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")
             s = (m[1] == "120000")
             self.modecache[(f, h)] = (p and "x") or (s and "l") or ""
             changes.append((f, h))
         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 = {}
         fh = os.popen('git-ls-remote --tags "%s" 2>/dev/null' % self.path)
         prefix = 'refs/tags/'
         for line in fh:
             line = line.strip()
             if not line.endswith("^{}"):
                 continue
             node, tag = line.split(None, 1)
             if not tag.startswith(prefix):
                 continue
             tag = tag[len(prefix):-3]
             tags[tag] = node
 
         return tags
 
 class convert_mercurial(converter_sink):
     def __init__(self, ui, path):
         self.path = path
         self.ui = ui
         try:
             self.repo = hg.repository(self.ui, 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.wwrite(f, data, e)
         if self.repo.dirstate.state(f) == '?':
             self.repo.dirstate.update([f], "a")
 
     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:
             self.ui.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(ui, path):
     if not os.path.isdir(path):
         raise util.Abort("%s: not a directory\n" % path)
     for c in converters:
         try:
             return c(ui, path)
         except NoRepo:
             pass
     raise util.Abort("%s: unknown repository type\n" % 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\n" % src)
 
     if not dest:
         dest = src + "-hg"
         ui.status("assuming destination %s\n" % dest)
-        if not os.path.isdir(dest):
-            ui.status("creating repository %s\n" % dest)
-            os.system("hg init " + 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 repo.RepoError:
+                raise util.Abort(
+"""destination directory %s is not empty.
+Please specify an empty directory to be initialized 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\n" % 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\n" % 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 [OPTIONS] <src> [dst [map]]'),
 }