Re: [GSoC] My Git Dev Blog – Week 8

[Atharva Raykar <raykar.ath@gmail.com>]

On 18-Jul-2021, at 23:09, Kaartic Sivaraam <kaartic.sivaraam@gmail.com> wrote:
> 
> Hi Atharva,
> 
> On 13/07/21 2:16 pm, Atharva Raykar wrote:
>> I was seeing if it was possible to at least save another spawn for calling
>> init when '--init' is provided for an update. The current implementation
>> does not spawn a separate process for this, so I was hoping I don't add
>> more overhead in the conversion, but it's looking hard to avoid at the
>> moment.
> 
> I'm having some difficulties understanding this. I tried to take a look
> at the existing code[2][3] in 'git-submodule.sh', I could only see that
> if '--init' is passed to update, it calls the 'cmd_update' shell function
> which in turn does invoke 'git submodule--helper init'. OTOH, if '--recursive'
> is passed 'cmd_update' itself is called recursively called after setting
> the 'prefix' and 'wt_prefix' shell variables.
> 
> So, I'm not sure how you mean to say that a sub-process was not spawned
> when '--init' is passed. Could you clarify this a little?
> 
>>> [1]: https://public-inbox.org/git/20180205235508.216277-1-sbeller@google.com/
>>> 
> 
> [2]: https://github.com/git/git/blob/abb21c7263616f01c5e950861a29279ab21cb02f/git-submodule.sh#L530-L533
> 
> [3]: https://github.com/git/git/blob/abb21c7263616f01c5e950861a29279ab21cb02f/git-submodule.sh#L651-L673

My mistake. When I wrote that paragraph, I had considered the shell call
in my head to be "git submodule init" and not "git submodule--helper init".

In the former case, there would be an extra subprocess because
'submodule init' will in turn spawn 'submodule--helper init'. So in short,
there would have been no difference between the two versions had I gone
down that route.