Re: [PATCH/RFC] git.c: support "!!" aliases that do not move cwd

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Duy Nguyen <pclouds@xxxxxxxxx> writes:

> On Fri, Oct 7, 2016 at 6:20 PM, Johannes Schindelin
> <Johannes.Schindelin@xxxxxx> wrote:
>> Hi Junio,
>>
>> On Thu, 6 Oct 2016, Junio C Hamano wrote:
>>
>>> Nguyễn Thái Ngọc Duy  <pclouds@xxxxxxxxx> writes:
>>>
>>> > Throwing something at the mailing list to see if anybody is
>>> > interested.
>>> >
>>> > Current '!' aliases move cwd to $GIT_WORK_TREE first, which could
>>> > make
>>> > handling path arguments hard because they are relative to the
>>> > original
>>> > cwd. We set GIT_PREFIX to work around it, but I still think it's
>>> > more
>>> > natural to keep cwd where it is.
>>> >
>>> > We have a way to do that now after 441981b (git: simplify
>>> > environment
>>> > save/restore logic - 2016-01-26). It's just a matter of choosing
>>> > the
>>> > right syntax. I'm going with '!!'. I'm not very happy with it.
>>> > But I
>>> > do like this type of alias.
>>>
>>> I do not know why you are not happy with the syntax, but I
>>> personally think it brilliant, both the idea and the preliminary
>>> clean-up that made this possible with a simple patch like this.
>>
>> I guess he is not happy with it because "!!" is quite unintuitive a
>> construct. I know that *I* would have been puzzled by it, asking
>> "What the
>> heck does this do?".
>
> Yep. And I wouldn't want to set a tradition for the next alias type
> '!!!'. There's no good choice to represent a new alias type with a
> leading symbol. This just occurred to me, however, what do you think
> about a new config group for it? With can have something like
> externalAlias.* (or some other name) that lives in parallel with
> alias.*. Then we don't need '!' (or '!!') at all.

Another possibility: !(nocd), which leaves room
for !(keyword1,keyword2,...) if needed later. Also, it is consistent
with the :(word) syntax of pathspecs.

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/



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