hg convert from git doesn't follow renames

[Paul Molodowitch]

>> Was looking to switch my repo over from git to hg, but I ran into a
>> bit of a snag - it seems hg convert from git doesn't preserve renaming
>> information.
>
> One possibility is to use fastimport.  That is, dump the git repo with
> 'git fast-export', then use the hg-fastimport extension
> (http://mercurial.selenic.com/wiki/FastImportExtension) to load it
> into Mercurial.  *If* it works, I think it will do a more accurate
> conversion than hg convert does.

Hmm.. this seems promising! Unfortunately, when I tested it out with a
simple git repo, which I'd dumped using:

cd gitRepo
git fast-export --all -M -C > ..\gitDump
cd ..
hg init hgFastImp
cd hgFastImp
hg fastimport ..\gitDump

...I got the following traceback:

Traceback (most recent call last):
  File "C:\Dev\Python25\Scripts\hg", line 5, in <module>
    pkg_resources.run_script('mercurial==1.3.1', 'hg')
  File "C:\Dev\Python25\lib\site-packages\pkg_resources.py", line 448,
in run_script
    self.require(requires)[0].run_script(script_name, ns)
  File "C:\Dev\Python25\lib\site-packages\pkg_resources.py", line
1166, in run_script
    execfile(script_filename, namespace, namespace)
  File "c:\dev\python25\lib\site-packages\mercurial-1.3.1-py2.5-win32.egg\EGG-INFO\scripts\hg",
line 27, in <module>
    mercurial.dispatch.run()
  File "C:\Dev\Python25\lib\site-packages\mercurial-1.3.1-py2.5-win32.egg\mercurial\dispatch.py",
line 16, in run
    sys.exit(dispatch(sys.argv[1:]))
  File "C:\Dev\Python25\lib\site-packages\mercurial-1.3.1-py2.5-win32.egg\mercurial\dispatch.py",
line 27, in dispatch
    return _runcatch(u, args)
  File "C:\Dev\Python25\lib\site-packages\mercurial-1.3.1-py2.5-win32.egg\mercurial\dispatch.py",
line 43, in _runcatch
    return _dispatch(ui, args)
  File "C:\Dev\Python25\lib\site-packages\mercurial-1.3.1-py2.5-win32.egg\mercurial\dispatch.py",
line 449, in _dispatch
    return runcommand(lui, repo, cmd, fullargs, ui, options, d)
  File "C:\Dev\Python25\lib\site-packages\mercurial-1.3.1-py2.5-win32.egg\mercurial\dispatch.py",
line 317, in runcommand
    ret = _runcommand(ui, options, cmd, d)
  File "C:\Dev\Python25\lib\site-packages\mercurial-1.3.1-py2.5-win32.egg\mercurial\dispatch.py",
line 501, in _runcommand
    return checkargs()
  File "C:\Dev\Python25\lib\site-packages\mercurial-1.3.1-py2.5-win32.egg\mercurial\dispatch.py",
line 454, in checkargs
    return cmdfunc()
  File "C:\Dev\Python25\lib\site-packages\mercurial-1.3.1-py2.5-win32.egg\mercurial\dispatch.py",
line 448, in <lambda>
    d = lambda: util.checksignature(func)(ui, *args, **cmdoptions)
  File "C:\Dev\Python25\lib\site-packages\mercurial-1.3.1-py2.5-win32.egg\mercurial\util.py",
line 402, in check
    return func(*args, **kwargs)
  File "C:\Dev\Python25\Lib\site-packages\hg-fastimport\hgfastimport\__init__.py",
line 44, in fastimport
    c.convert(sortmode)
  File "C:\Dev\Python25\lib\site-packages\mercurial-1.3.1-py2.5-win32.egg\hgext\convert\convcmd.py",
line 311, in convert
    heads = self.source.getheads()
  File "C:\Dev\Python25\lib\site-packages\hg-fastimport\hgfastimport\hgimport.py",
line 50, in getheads
    self._parse()
  File "C:\Dev\Python25\lib\site-packages\hg-fastimport\hgfastimport\hgimport.py",
line 112, in _parse
    processor.parseMany(self.sources, parser.ImportParser, self.processor)
  File "C:\Dev\Python25\Lib\site-packages\pyfastimport\fastimport\processor.py",
line 219, in parseMany
    processor.process(parser.parse())
  File "C:\Dev\Python25\Lib\site-packages\pyfastimport\fastimport\processor.py",
line 76, in process
    handler(self, cmd)
  File "C:\Dev\Python25\lib\site-packages\hg-fastimport\hgfastimport\hgimport.py",
line 275, in commit_handler
    commit_handler.process()
  File "C:\Dev\Python25\Lib\site-packages\pyfastimport\fastimport\processor.py",
line 154, in process
    handler(self, fc)
  File "C:\Dev\Python25\lib\site-packages\hg-fastimport\hgfastimport\hgimport.py",
line 408, in rename_handler
    self.copies[filecmd.oldname] = filecmd.newname
AttributeError: 'FileRenameCommand' object has no attribute 'newname'

I'll poke around in hg-fastimport's code a little later - hopefully
there's an easy fix!

- Paul