Re: Fix for normalization of foreign idents

[Jonathan Nieder <jrnieder@gmail.com>]

Hi,

Marcus Comstedt wrote:

>   $Id: blah$ --(c_t_w_t)--> $Id: blah$ --(c_t_g)--> $Id: blah$
> 
> This restores correct and deterministic operation of status and
> diff, meaning that if the file hasn't actually been modified, no
> modifications are shown.
> 
> As you might suggest, always keeping the foreign ident would mean it
> is never updated when you commit new versions of the file, which isn't
> really what we want.  Keeping the foreign ident as long as the last
> modification to the file was made in the previous version control
> system makes perfect sense, but once we make a commit to the file
> within git, it should be replaced with a git ident.

I was with you up to here.  Is commit time really the right moment
to clobber a foreign ident?  I suspect it would be confusing.

It might be simpler to just never clobber a foreign ident and instead
rely on local policy (scripts, pre-commit hooks, and so on) to remove
them at the appropriate time.