Re: [PATCH 1/3] ls-tree.c: support `--oid-only` option for "git-ls-tree"

> This commit supply an option names `--oid-only` to let `git ls-tree`
> only print out the OID of the object. `--oid-only` and `--name-only`
> are mutually exclusive in use.
>
> Signed-off-by: Teng Long <dyroneteng@gmail.com>
> ---
>  builtin/ls-tree.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/builtin/ls-tree.c b/builtin/ls-tree.c
> index 3a442631c7..1f82229649 100644
> --- a/builtin/ls-tree.c
> +++ b/builtin/ls-tree.c
> @@ -20,6 +20,7 @@ static int line_termination = '\n';
>  #define LS_SHOW_TREES 4
>  #define LS_NAME_ONLY 8
>  #define LS_SHOW_SIZE 16
> +#define LS_OID_ONLY 32
>  static int abbrev;
>  static int ls_options;
>  static struct pathspec pathspec;
> @@ -90,6 +91,14 @@ static int show_tree(const struct object_id *oid, struct strbuf *base,
>  	else if (ls_options & LS_TREE_ONLY)
>  		return 0;
>  
> +	if ((ls_options & LS_NAME_ONLY) && (ls_options & LS_OID_ONLY))
> +		die(_("cannot specify --oid-only and --name-only at the same time"));