Re: [PATCH v3 3/9] pack-objects: factor out handling '--stdin-packs'

> At the bottom of cmd_pack_objects() we check which mode the command is
> running in (e.g., generating a cruft pack, handling '--stdin-packs',
> using the internal rev-list, etc.) and handle the mode appropriately.
>
> The '--stdin-packs' case is handled inline (dating back to its
> introduction in 339bce27f4 (builtin/pack-objects.c: add '--stdin-packs'
> option, 2021-02-22)) since it is relatively short. Extract the body of
> "if (stdin_packs)" into its own function to prepare for the
> implementation to become lengthier in a following commit.
>
> Signed-off-by: Taylor Blau <me@ttaylorr.com>
> ---
>  builtin/pack-objects.c | 18 ++++++++++++------
>  1 file changed, 12 insertions(+), 6 deletions(-)

>
> diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
> index 4ab695a3aa..a293267074 100644
> --- a/builtin/pack-objects.c
> +++ b/builtin/pack-objects.c
> @@ -3674,6 +3674,17 @@ static void read_packs_list_from_stdin(void)
>  	string_list_clear(&exclude_packs, 0);
>  }
>  
> +static void add_unreachable_loose_objects(void);
> +
> +static void read_stdin_packs(int rev_list_unpacked)
> +{
> +	/* avoids adding objects in excluded packs */
> +	ignore_packed_keep_in_core = 1;
> +	read_packs_list_from_stdin();
> +	if (rev_list_unpacked)
> +		add_unreachable_loose_objects();
> +}
> +
>  static void add_cruft_object_entry(const struct object_id *oid, enum object_type type,
>  				   struct packed_git *pack, off_t offset,
>  				   const char *name, uint32_t mtime)
> @@ -3769,7 +3780,6 @@ static void mark_pack_kept_in_core(struct string_list *packs, unsigned keep)
>  	}
>  }
>  
> -static void add_unreachable_loose_objects(void);
>  static void add_objects_in_unpacked_packs(void);
>  
>  static void enumerate_cruft_objects(void)
> @@ -4776,11 +4786,7 @@ int cmd_pack_objects(int argc,
>  		progress_state = start_progress(the_repository,
>  						_("Enumerating objects"), 0);
>  	if (stdin_packs) {
> -		/* avoids adding objects in excluded packs */
> -		ignore_packed_keep_in_core = 1;
> -		read_packs_list_from_stdin();
> -		if (rev_list_unpacked)
> -			add_unreachable_loose_objects();
> +		read_stdin_packs(rev_list_unpacked);
>  	} else if (cruft) {
>  		read_cruft_objects();
>  	} else if (!use_internal_rev_list) {