Adam Roben <aroben@apple.com> writes:

quoted text
> This will make it easier to add newer options later.

A good change in principle.

quoted text
> diff --git a/builtin-cat-file.c b/builtin-cat-file.c
> index 34a63d1..3a0be4a 100644
> --- a/builtin-cat-file.c
> +++ b/builtin-cat-file.c
> @@ -143,23 +143,41 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name)
>  	return 0;
>  }
>  
> +static const char cat_file_usage[] = "git-cat-file [-t|-s|-e|-p|<type>] <sha1>";
> +
>  int cmd_cat_file(int argc, const char **argv, const char *prefix)
>  {
> -	int opt;
> -	const char *exp_type, *obj_name;
> +	int i, opt = 0;
> +	const char *exp_type = 0, *obj_name = 0;

NULL pointer constants in git sources are spelled "NULL", not
"0".

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