Re: [GSoC] [PATCH v3] submodule--helper: introduce add-config subcommand

[Kaartic Sivaraam <kaartic.sivaraam@gmail.com>]

On 01/08/21 12:03 pm, Atharva Raykar wrote:
> Add a new "add-config" subcommand to `git submodule--helper` with the
> goal of converting part of the shell code in git-submodule.sh related to
> `git submodule add` into C code. This new subcommand sets the
> configuration variables of a newly added submodule, by registering the
> url in local git config, as well as the submodule name and path in the
> .gitmodules file. It also sets 'submodule.<name>.active' to "true" if
> the submodule path has not already been covered by any pathspec
> specified in 'submodule.active'.
> 
> This is meant to be a faithful conversion from shell to C, although we
> add comments to areas that could be improved in future patches, after
> the conversion has settled.
> 
> Signed-off-by: Atharva Raykar <raykar.ath@gmail.com>
> Mentored-by: Christian Couder <christian.couder@gmail.com>
> Mentored-by: Shourya Shukla <periperidip@gmail.com>
> Based-on-patch-by: Shourya Shukla <periperidip@gmail.com>
> Based-on-patch-by: Prathamesh Chavan <pc44800@gmail.com>
> ---
>

The v3 mostly looks good to me. Just one style nit:

> [ ... ]
>
> +static void configure_added_submodule(struct add_data *add_data)
> +{
> +	char *key;
> +	char *val = NULL;
> +	struct child_process add_submod = CHILD_PROCESS_INIT;
> +	struct child_process add_gitmodules = CHILD_PROCESS_INIT;
> +
> +	key = xstrfmt("submodule.%s.url", add_data->sm_name);
> +	git_config_set_gently(key, add_data->realrepo);
> +	free(key);
> +
> +	add_submod.git_cmd = 1;
> +	strvec_pushl(&add_submod.args, "add",
> +		     "--no-warn-embedded-repo", NULL);
> +	if (add_data->force)
> +		strvec_push(&add_submod.args, "--force");
> +	strvec_pushl(&add_submod.args, "--", add_data->sm_path, NULL);
> +
> +	if (run_command(&add_submod))
> +		die(_("Failed to add submodule '%s'"), add_data->sm_path);
> +
> +	if (config_submodule_in_gitmodules(add_data->sm_name, "path", add_data->sm_path) ||
> +	    config_submodule_in_gitmodules(add_data->sm_name, "url", add_data->repo))
> +		die(_("Failed to register submodule '%s'"), add_data->sm_path);
> +
> +	if (add_data->branch)
> +		if (config_submodule_in_gitmodules(add_data->sm_name,
> +						   "branch", add_data->branch))
> +			die(_("Failed to register submodule '%s'"), add_data->sm_path);
> +

As the body of if(add->branch) has a nested if in it and totally spans 3 lines, it might
be a good idea to wrap it in braces like so:

         if (add_data->branch) {
                 if (config_submodule_in_gitmodules(add_data->sm_name,
                                                    "branch", add_data->branch))
                         die(_("Failed to register submodule '%s'"), add_data->sm_path);
         }


... or collapse both conditionals into a single if like so:

         if (add_data->branch &&
             config_submodule_in_gitmodules(add_data->sm_name, "branch", add_data->branch))
                 die(_("Failed to register submodule '%s'"), add_data->sm_path);

-- 
Sivaraam