Re: [PATCH v6 6/6] clean: teach clean -d to preserve ignored paths

> diff --git a/builtin/clean.c b/builtin/clean.c
> index d861f836a..937eb17b6 100644
> --- a/builtin/clean.c
> +++ b/builtin/clean.c
> @@ -857,6 +857,38 @@ static void interactive_main_loop(void)
>   	}
>   }
>   
> +static void correct_untracked_entries(struct dir_struct *dir)
> +{
> +	int src, dst, ign;
> +
> +	for (src = dst = ign = 0; src < dir->nr; src++) {
> +		/* skip paths in ignored[] that cannot be inside entries[src] */
> +		while (ign < dir->ignored_nr &&
> +		       0 <= cmp_dir_entry(&dir->entries[src], &dir->ignored[ign]))
> +			ign++;
> +
> +		if (ign < dir->ignored_nr &&
> +		    check_dir_entry_contains(dir->entries[src], dir->ignored[ign])) {
> +			/* entries[src] contains an ignored path, so we drop it */
> +			free(dir->entries[src]);
> +		} else {
> +			struct dir_entry *ent = dir->entries[src++];
> +
> +			/* entries[src] does not contain an ignored path, so we keep it */
> +			dir->entries[dst++] = ent;
> +
> +			/* then discard paths in entries[] contained inside entries[src] */
> +			while (src < dir->nr &&
> +			       check_dir_entry_contains(ent, dir->entries[src]))
> +				free(dir->entries[src++]);
> +
> +			/* compensate for the outer loop's loop control */
> +			src--;
> +		}
> +	}
> +	dir->nr = dst;
> +}
> +