Re: [PATCH 5/8] config: Disallow multiple config file locations.

> Either --global, --system, or --file should be used, but not any
> combination.
> 
> Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
> ---
>  builtin-config.c |   10 ++++++++++
>  1 files changed, 10 insertions(+), 0 deletions(-)
> 
> diff --git a/builtin-config.c b/builtin-config.c
> index 83f8b74..e744ad8 100644
> --- a/builtin-config.c
> +++ b/builtin-config.c
> @@ -314,6 +314,16 @@ int cmd_config(int argc, const char **argv, const char *unused_prefix)
>  
>  	argc = parse_options(argc, argv, builtin_config_options, builtin_config_usage, 0);
>  
> +	{
> +		int config_file_count = use_global_config + use_system_config;
> +		if (given_config_file)
> +			config_file_count++;
> +		if (config_file_count > 1) {
> +			error("only one config file at a time.");
> +			usage_with_options(builtin_config_usage, builtin_config_options);
> +		}
> +	}