[mythtv-users] git & wiki

[Ian Kent]

On Wed, 2010-12-08 at 11:13 -0500, Jarod Wilson wrote:
> On Dec 8, 2010, at 10:10 AM, Udo van den Heuvel wrote:
> 
> > On 2010-12-08 15:07, Ian Kent wrote:
> >> On Wed, 2010-12-08 at 21:57 +0800, Ian Kent wrote:
> >>>> E.g.: I still need to find out how to get the git commit number we're at
> >>>> to adjust the name of the mythtv rpms.
> >>> 
> >>> git show HEAD | head -1 | awk '{print $2}'
> > 
> > Hey, thanks!
> 
> No, ew, there are better ways. See below. :)
> 
> 
> >>> but that shows the full commit id. You probably only want to use the
> >>> first 8 digits of that.
> > 
> > No problem.  `cut` can fix that, maybe other tricks can help here, too.
> 
> git describe | cut -d- -f 3

Ha, cool, never used that before!

> 
> >>> Other git tools get things right when the first
> >>> 8 digits is provided and there hasn't been any time that I have tried to
> >>> use just the first 8 digits that has not returned the commit I was
> >>> after.
> > 
> > OK, that is helpful info!
> 
> git describe gives you a minimal hash that is guaranteed to be unique.
> If more than 8 characters are needed, it'll give 'em to you.

But won't a variable length commit number cause havoc with things like
rpm version comparisons. I guess there's a need to ensure that the
version string components used allow for a previous component that is
always increasing.

Ian