Re: [GSoC][PATCH 1/8] submodule--helper: introduce get_submodule_displaypath()

> Introduce function get_submodule_displaypath() to replace the code
> occurring in submodule_init() for generating displaypath of the
> submodule with a call to it.
> 
> This new function will also be used in other parts of the system
> in later patches.
> 
> Mentored-by: Christian Couder <christian.couder@gmail.com>
> Mentored-by: Stefan Beller <sbeller@google.com>
> Signed-off-by: Prathamesh Chavan <pc44800@gmail.com>
> ---
>  builtin/submodule--helper.c | 33 ++++++++++++++++++++++-----------
>  1 file changed, 22 insertions(+), 11 deletions(-)
> 
> diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
> index 6abdad329..7af4de09b 100644
> --- a/builtin/submodule--helper.c
> +++ b/builtin/submodule--helper.c
> @@ -220,6 +220,27 @@ static int resolve_relative_url_test(int argc, const char **argv, const char *pr
>  	return 0;
>  }
>  
> +static char *get_submodule_displaypath(const char *path, const char *prefix)
> +{
> +	const char *super_prefix = get_super_prefix();
> +
> +	if (prefix && super_prefix) {
> +		BUG("cannot have prefix '%s' and superprefix '%s'",
> +		    prefix, super_prefix);
> +	} else if (prefix) {
> +		struct strbuf sb = STRBUF_INIT;
> +		char *displaypath = xstrdup(relative_path(path, prefix, &sb));
> +		strbuf_release(&sb);
> +		return displaypath;
> +	} else if (super_prefix) {
> +		int len = strlen(super_prefix);
> +		const char *format = is_dir_sep(super_prefix[len - 1]) ? "%s%s" : "%s/%s";
> +		return xstrfmt(format, super_prefix, path);
> +	} else {
> +		return xstrdup(path);
> +	}
> +}
> +
>  struct module_list {
>  	const struct cache_entry **entries;
>  	int alloc, nr;
> @@ -339,16 +360,7 @@ static void init_submodule(const char *path, const char *prefix, int quiet)
>  
>  	/* Only loads from .gitmodules, no overlay with .git/config */
>  	gitmodules_config();
> -
> -	if (prefix && get_super_prefix())
> -		die("BUG: cannot have prefix and superprefix");
> -	else if (prefix)
> -		displaypath = xstrdup(relative_path(path, prefix, &sb));
> -	else if (get_super_prefix()) {
> -		strbuf_addf(&sb, "%s%s", get_super_prefix(), path);
> -		displaypath = strbuf_detach(&sb, NULL);
> -	} else
> -		displaypath = xstrdup(path);
> +	displaypath = get_submodule_displaypath(path, prefix);
>  
>  	sub = submodule_from_path(null_sha1, path);
>  
> @@ -363,7 +375,6 @@ static void init_submodule(const char *path, const char *prefix, int quiet)
>  	 * Set active flag for the submodule being initialized
>  	 */
>  	if (!is_submodule_active(the_repository, path)) {
> -		strbuf_reset(&sb);

>  		strbuf_addf(&sb, "submodule.%s.active", sub->name);
>  		git_config_set_gently(sb.buf, "true");
>  	}
> -- 
> 2.13.0
>