[PATCH] identify: add template support

[Matt Harbison]

On Sun, 25 Jun 2017 08:19:29 -0400, Yuya Nishihara <yuya at tcha.org> wrote:

> On Sun, 25 Jun 2017 01:23:41 -0400, Matt Harbison wrote:
>> # HG changeset patch
>> # User Matt Harbison <matt_harbison at yahoo.com>
>> # Date 1498360161 14400
>> #      Sat Jun 24 23:09:21 2017 -0400
>> # Node ID 1e917448c8d5c36f19c41bc83793df3e92477ede
>> # Parent  8299eb9b08c79699f496717d626842b72fa5ca4f
>> identify: add template support
>
...

>
>> Yuya mentioned using fm.nested() in that thread, so I did for the  
>> parent nodes.
>> I'm not sure if the plan is to fill in all of the context attributes in  
>> these
>> items, or if these nested items should simply be made {p1node} and  
>> {p1rev}.
>
> [...]
>
>> +            for i, p in enumerate(parents):
>> +                fn = fm.nested('p%d' % (i + 1))
>> +                fn.startitem()
>> +                fn.data(rev=p.rev())
>> +                fn.data(node=p.hex())
>> +                fn.end()
>
> I meant this could be a {parents} list, which is
>
>   fn = fm.nested('parents')
>   for ...
>       fn.startitem()
>       ...
>
> Each item could have fn.context(ctx=p) so that all template keywrods are
> available.

I saw that, and tried it, but I didn't think it worked.  I was expecting  
lines in the json output I guess.  But after digging in a bit more, maybe  
it's just a bug in nested formatters?  `hg branches` works fine for both  
functions and keywords.  But (on default in the hg repo):

$ ../hg id -T "{p1 % '{latesttag}\n'}"

$ ../hg id -T "{p1 % '{latesttag()}\n'}"
** unknown exception encountered, please report by visiting
[...]
   File "c:\Users\Matt\projects\hg\mercurial\templatekw.py", line 486, in  
showlatesttags
     repo, ctx = args['repo'], args['ctx']
KeyError: 'repo'