Re: [PATCH v2 03/10] builtin/cat-file: support "blob:none" objects filter

> Implement support for the "blob:none" filter in git-cat-file(1), which
> causes us to omit all blobs.
>
> Signed-off-by: Patrick Steinhardt <ps@pks.im>
> ---
>  Documentation/git-cat-file.adoc |  2 ++
>  builtin/cat-file.c              | 11 ++++++++++-
>  t/t1006-cat-file.sh             | 33 +++++++++++++++++++++++++++++++--
>  3 files changed, 43 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/git-cat-file.adoc b/Documentation/git-cat-file.adoc
> index f7f57b7f538..bb32f715944 100644
> --- a/Documentation/git-cat-file.adoc
> +++ b/Documentation/git-cat-file.adoc
> @@ -86,6 +86,8 @@ OPTIONS
>  	Omit objects from the list of printed objects. This can only be used in
>  	combination with one of the batched modes. The '<filter-spec>' may be
>  	one of the following:
> ++
> +The form '--filter=blob:none' omits all blobs.
>
>  --path=<path>::
>  	For use with `--textconv` or `--filters`, to allow specifying an object
> diff --git a/builtin/cat-file.c b/builtin/cat-file.c
> index 940900d92ad..e783dbbad58 100644
> --- a/builtin/cat-file.c
> +++ b/builtin/cat-file.c
> @@ -472,7 +472,8 @@ static void batch_object_write(const char *obj_name,
>  	if (!data->skip_object_info) {
>  		int ret;
>
> -		if (use_mailmap)
> +		if (use_mailmap ||
> +		    opt->objects_filter.choice == LOFC_BLOB_NONE)
>  			data->info.typep = &data->type;
>