Re: [PATCH v2 1/9] perf/run: add '--config' option to the 'run' script

> It is error prone and tiring to use many long environment
> variables to give parameters to the 'run' script.
> 
> Let's make it easy to store some parameters in a config
> file and to pass them to the run script.
> 
> The GIT_PERF_CONFIG_FILE variable will be set to the
> argument of the '--config' option. This variable is not
> used yet. It will be used in a following commit.
> 
> Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
> ---
>  t/perf/run | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/t/perf/run b/t/perf/run
> index beb4acc0e428d..1e7c2a59e45dc 100755
> --- a/t/perf/run
> +++ b/t/perf/run
> @@ -2,9 +2,14 @@
>  
>  case "$1" in
>  	--help)
> -		echo "usage: $0 [other_git_tree...] [--] [test_scripts]"
> +		echo "usage: $0 [--config file] [other_git_tree...] [--] [test_scripts]"
>  		exit 0
>  		;;
> +	--config)
> +		shift
> +		GIT_PERF_CONFIG_FILE=$(cd "$(dirname "$1")"; pwd)/$(basename "$1")

> +		export GIT_PERF_CONFIG_FILE
> +		shift ;;
>  esac
>  
>  die () {
> 
> --
> https://github.com/git/git/pull/408