Re: [PATCH RFC] diff: add SUBMODULE_DIFF format to display submodule diff

From: Stefan Beller <sbeller@google.com>
Date: Aug 9, 2016, 23:15 UTC
Message-ID: <CAGZ79kYkA=jJPHy+jqe5zVz0kM+95hxFUZPTNCKMJzbmJ7gaew@mail.gmail.com>
In-Reply-To: <CAGZ79kZbHAsxf9G-8=nz3o_zOMNFPa=kSphdo=4zLq97jycbYg@mail.gmail.com>

On Tue, Aug 9, 2016 at 4:10 PM, Stefan Beller <sbeller@google.com> wrote:

> xread does use a poll() for you so it is not active polling,
> but only reading when data is available.

s/active polling/ spinning/

Show 10 quoted lines

>
>
>>>
>>> When not checked out, we can invoke the diff command
>>> in .git/modules/<name> as that is the git dir of the submodule,
>>> i.e. operating diff with a bare repo?
>>
>> We can actually do this every time. How would you pass that in a
>> child_process? I don't think it's "dir" but instead passing
>> "--git-dir" somehow?

I think it doesn't matter. You can still use .dir.
(That would be equivalent to `cd $GIT_DIR && git diff sha1..sha1`
which works just as well, even in the submodule case)
Alternatively you could do
    argv_array_pushf(cp.env_array, "GIT_DIR=%s", ...)

So I would drop the -C here and just use the .dir attribute.

> git -C $GIT_DIR diff --relative ${superprojects ce->name}