[PATCH 2 of 3] convert extension: Add support for username mapping

[Brendan Cully]

Applied, thanks. There were a few bugs related to reading and writing
the file (for instance, hasattr authorfile was never going to
fail). I've fixed them myself in a follow-up patch.

On Thursday, 14 June 2007 at 23:28, Edouard Gomez wrote:
> # HG changeset patch
> # User Edouard Gomez <ed.gomez at free.fr>
> # Date 1181856355 -7200
> # Node ID 451e91ed535ea94a1771f6df1acbfe81cf2b8176
> # Parent  9855939d0c82ae079ff950b5b0031ad84e549557
> convert extension: Add support for username mapping
> 
> Allows mapping usernames to new ones during conversion process.
>  - Use -A option for first import
>  - Then at the end of the conversion process and if the destination
>    repo supports authorfile attribute, author map content is copied
>    to the file pointed by the authorfile call.
>  - On incremental conversions w/o any -A option specified, the
>    destination authorfile, if any, gets read automatically.
> 
> EG: This allows mapping unix system usernames used in CVS accounts
>     to a more typical "Firstname Lastname <address at server.org>" pair.