Re: [RFC] Porting builtin/branch.c to use the printing options of ref-filter.{c,h}

[Karthik Nayak <karthik.188@gmail.com>]

On Wed, Aug 26, 2015 at 12:20 AM, Junio C Hamano <gitster@pobox.com> wrote:
> Karthik Nayak <karthik.188@gmail.com> writes:
>
>> I'm working on porting over the printing options of ref-filter to `git
>> branch -l`.
>> This is a follow up to
>> http://article.gmane.org/gmane.comp.version-control.git/276377
>>
>> Theres a slight issue with this which I'd like to discuss about.
>>
>> When we use `-a` option in `git branch -l`
>> It lists local branches and remotes with each having a different output format.
>> This with reference to ref-filter would mean either
>>
>> 1. Change format in between local and remote refs
>
> I thought the end result of consolidation would be for for-each-ref,
> branch -l, and tag -l to be "first collect what to show, and then
> show them according to a single format given".  How could it be
> possible to switch format?  It's not even like each element collected
> in the first phase is marked so that the second "display" phase know
> which one is which.
>

Absolutely right! Currently this is not even possible, It was just a shot in the
dark. I was just shooting out possibilities I could think of :)

>> 2. Have a format like %(if)...local check....%(then)....local branch
>> format....%(else)....remote format %(end).
>
> That, if we had a working if/then/else/end, would be a good
> demonstration of it.
>
> If this were only for internal use by "branch -l", it might be
> overkill, but the end users with for-each-ref --format options would
> want to do the same thing as built-in patterns, so it is a good goal
> to aim at.
>

I have a version of that running in my local repo, I'll probably
post a WIP soon, when I get this done.

>> I prefer the latter, but that might lead to a large format. Any suggestions?
>
> A less ambitious option might be:
>
>   3. Invent "%(refname:<some magic>)" format similar to
>      %(refname:short) but does your thing depending on the prefix
>      refs/heads/ and refs/remotes/.
>
> but that will not work if the difference between local and remote
> format is not merely textual (e.g. paint them in different color).

It's more than just colors. The whole format changes.

$ git branch -a
For local:
"%(if)%(HEAD)%(then)%(HEAD) %(color:green)%(refname:short)%(else)
%(refname:short)%(end)"
For remote:
"  remotes/%(color:red)%(refname:short)%(color:reset)%(if)%(symref)%(then)
-> %(symref:short)%(end)"



On Wed, Aug 26, 2015 at 1:36 AM, Matthieu Moy
<Matthieu.Moy@grenoble-inp.fr> wrote:
>
> Hmm, yes, colors would be difficult to get with this solution. Perhaps a
> %(refname:autoprefix,autocolor) that would pick the color and do the
> textual rendering?
>

That sounds, good, probably could work on something of this sort.

-- 
Regards,
Karthik Nayak