Re: [PATCH] connect: read $GIT_SSH_COMMAND from config file

[Jeff King <peff@peff.net>]

On Sun, Jun 26, 2016 at 01:16:35PM +0200, Nguyễn Thái Ngọc Duy wrote:

> Similar to $GIT_ASKPASS or $GIT_PROXY_COMMAND, we also read from
> config file first then fall back to $GIT_SSH_COMMAND.
> 
> This is useful for selecting different private keys targetting the
> same host (e.g. github)
> 
> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
> ---
>  core.gitProxy can also be used for my purpose (I need pushing, not
>  fetching though; the document says for fetching but I guess
>  core.gitProxy always works for pushing), but then the key file
>  is hidden behind the script. And writing a script for this seems a
>  bit overkill.

This patch makes sense to me. The way I have done this in the past is to
use ssh's config. So I set my remote in one repo to "foo:repo1.git" and
another to "bar:repo2.git", and then:

  Host foo
    Hostname actual-host.example.com
    SomeOption ...

  Host bar
    Hostname actual-host.example.com
    SomeOption ...

(or more likely, most repos are fine with the defaults, and you only
need one fake host block for the oddball repo).

But I think your solution is a more direct and less confusing way of
accomplishing the same thing.

> diff --git a/Documentation/config.txt b/Documentation/config.txt
> index 58673cf..3bf070c 100644
> --- a/Documentation/config.txt
> +++ b/Documentation/config.txt
> @@ -443,6 +443,13 @@ specify that no proxy be used for a given domain pattern.
>  This is useful for excluding servers inside a firewall from
>  proxy use, while defaulting to a common proxy for external domains.
>  
> +core.sshCommand::
> +	If this variable is set then 'git fetch' and 'git push' will

Probably s/set/set,/.

> +	use the specified command instead of 'ssh' when they need to
> +	connect to a remote system. The command is in the same form as
> +	'GIT_SSH_COMMAND' environment variable and is overriden when
> +	the environment variable is set.

Probably s/'GIT_SSH_COMMAND'/the &/.

Are we using backticks for typesetting environment variables now? That
has always been my preference, but I haven't kept up with the typography
patches that have been flying lately. +cc Matthieu.

(Similar question for commands like 'git fetch').

> diff --git a/connect.c b/connect.c
> index c53f3f1..722dc3f 100644
> --- a/connect.c
> +++ b/connect.c

The code itself looks obviously correct. :)

-Peff