How can I rebase without destroying changeset metadata?

[Siddharth Agarwal]

On 01/14/2013 02:00 AM, dukeofgaming wrote:
> So that leaves my newest commit as the root commit, effectively 
> rewriting history to include that .hgeol file with all changes... 
> problem is now, that I cannot pull from Perforce anymore, why?: there 
> used to be a "Perforce" field in my imported changesets and is now gone.

FWIW, the code that manages extra fields is at [1]. There does seem to 
be possible extensibility via extrafn there, but I don't know what the 
right semantics are. I looked at the hgsubversion source and it does use 
extrafn, but that doesn't seem to retain the convert_revision either [2].

[1] http://selenic.com/repo/hg/file/5db16424142c/hgext/rebase.py#l360
[2] 
https://bitbucket.org/durin42/hgsubversion/src/68191be64af84e03ff1b7feb0629b44011a1ae0a/hgsubversion/wrappers.py?at=default#cl-473