Re: [PATCH 5/5] run-command: add note about forking and threading

From: Jonathan Nieder <jrnieder@gmail.com>
Date: Apr 11, 2017, 17:33 UTC
Message-ID: <20170411173320.GM8741@aiede.mtv.corp.google.com>
In-Reply-To: <20170411005348.GA30913@starla>

Eric Wong wrote:

> Jonathan Nieder <jrnieder@gmail.com> wrote:

>> Why can't git use e.g. posix_spawn to avoid this?
>
> posix_spawn does not support chdir, and it seems we run non-git
> commands so no using "git -C" for those.

On the other hand, a number of the non-git commands we run are in a shell. At the cost of a wasted shell process, other commands can be spawned using posix_spawn by passing the chosen directory and command to

	sh -c 'cd "$1" && shift && exec "$@"' -

[...]

> I posted some notes about it last year:
>
>   https://public-inbox.org/git/20160629200142.GA17878@dcvr.yhbt.net/

Thanks for these notes.

Sincerely, Jonathan

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