Re: [PATCH v3 0/2] Add hostname condition to includeIf

> The suggestion for having `git var` list GIT_HOSTNAME gave me
> an idea: perhaps instead of, or in addition to, a `hostname`
> condition in the `includeif` code, we could:
>
>  * have an `includeif:env:...` condition that tests an env
>    variable against a pattern; and/or
>  * use $GIT_HOSTNAME as the variable.

> We'd then set `GIT_HOSTNAME` to the gethostname() result *unless*
> it's already set.
>
> This gives users much more flexibility, because:
>
>  * they can use the hostname and/or arbitrary-env-var condition;
>  * they can then *set* GIT_HOSTNAME to the short or full
>    hostname at their discretion if the default is not suitable
>    for some reason; and of course
>  * they can, as noted, use `git var` to find the default setting.
>
> Chris