Re: [bug] blame duplicates trailing ">" in mailmapped emails

[Jeff King <peff@peff.net>]

On Sun, Feb 05, 2012 at 01:38:19PM -0800, Junio C Hamano wrote:

> > The map_user() API takes an email address that is terminated by either NUL
> > or '>' to allow the caller to learn the corresponding up-to-date email
> > address that is NUL terminated, while indicating with its return value
> > that if the caller even needs to replace what it already has.  But the
> > function does not properly terminate email when it only touched the name
> > part. And I think that is the real bug.
> 
> And the gist of the patch to fix the bug would look like this two liner.
> In the real fix, "p" should be renamed to "end_of_email" or something
> descriptive like that.

Exactly; this is much better.

We could also go as far as saying that map_user would _always_ terminate
in this way (i.e., the caller gets a munged result, whether we found
anything or not). Then internally, map_user could be simplified to stop
worrying about making a temporary copy in mailbuf. And callers could
simply call map_user without worrying about branching on whether it
found anything or not.

But maybe it is not worth that level of refactoring. From my reading,
your patch fixes the problem just fine.

-Peff