From: Brandon Williams <bmwill@google.com>
Date: Thu, 01 Dec 2016 01:14:39 GMT
Subject: Re: What's cooking in git.git (Nov 2016, #06; Mon, 28)
Message-ID: <20161201011439.GF192901@google.com>
In-Reply-To: <CAGZ79kaaJgsa8SsvWiGkmKQU7Wv_PD6O50ybm=rxPySk=z9N7Q@mail.gmail.com>

On 11/30, Stefan Beller wrote:
> > Oh interesting, I wonder if there is a way to not have to perform a
> > chdir since taking a lock to lstat wouldn't be ideal.
> 
> I think we could rewrite is_submodule_populated to be
> 
> int is_submodule_populated_cheap_with_no_chdir(char *path)
> {
>     return stat(path + ".git")
> }
> 
> i.e. just take the presence of the .git file/dir as a hint to run
> the child process?

I like this approach, its a quick (thread-safe) check to see if the
submodule is interesting.  If there happens to be an error with the
submodule's .git file/directory then the child process will fail out.

-- 
Brandon Williams