Re: [PATCH v3 5/5] rm: delete .gitmodules entry of submodules removed from the work tree

> +/*
> + * Try to remove the "submodule.<name>" section from .gitmodules where the given
> + * path is configured. Return 0 only if a .gitmodules file was found, a section
> + * with the correct path=<path> setting was found and we could remove it.
> + */
> +int remove_path_from_gitmodules(const char *path)
> +{
> +	struct strbuf sect = STRBUF_INIT;
> +	struct string_list_item *path_option;
> +
> +	if (!file_exists(".gitmodules")) /* Do nothing without .gitmodules */
> +		return -1;
> +
> +	if (gitmodules_is_unmerged)
> +		die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
> +
> +	path_option = unsorted_string_list_lookup(&config_name_for_path, path);
> +	if (!path_option) {
> +		warning(_("Could not find section in .gitmodules where path=%s"), path);
> +		return -1;
> +	}
> +	strbuf_addstr(&sect, "submodule.");
> +	strbuf_addstr(&sect, path_option->util);
> +	if (git_config_rename_section_in_file(".gitmodules", sect.buf, NULL) < 0) {
> +		/* Maybe the user already did that, don't error out here */
> +		warning(_("Could not remove .gitmodules entry for %s"), path);
> +		return -1;
> +	}
> +	strbuf_release(&sect);
> +	return 0;
> +}