Re: [PATCH 2/7] built-in add -p: implement the "stash" and "reset" patch modes

> From: Johannes Schindelin <johannes.schindelin@gmx.de>
>
> The `git stash` and `git reset` commands support a `--patch` option, and
> both simply hand off to `git add -p` to perform that work. Let's teach
> the built-in version of that command to be able to perform that work, too.
>
> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
> ---
>  add-interactive.h |  2 ++
>  add-patch.c       | 85 ++++++++++++++++++++++++++++++++++++++++++++---
>  builtin/add.c     |  4 +++
>  3 files changed, 87 insertions(+), 4 deletions(-)
>
> diff --git a/add-interactive.h b/add-interactive.h
> index 3defa2ff3d..c278f3e26f 100644
> --- a/add-interactive.h
> +++ b/add-interactive.h
> @@ -25,6 +25,8 @@ int run_add_i(struct repository *r, const struct pathspec *ps);
>  
>  enum add_p_mode {
>  	ADD_P_STAGE,
> +	ADD_P_STASH,
> +	ADD_P_RESET,

> +static struct patch_mode patch_mode_reset_head = {
> +	.diff = { "diff-index", "--cached", NULL },
> +	.apply = { "-R", "--cached", NULL },
> +	.apply_check = { "-R", "--cached", NULL },
> +	.is_reverse = 1,
> +	.index_only = 1,
> +	.prompt_mode = {
> +		N_("Unstage mode change [y,n,q,a,d%s,?]? "),
> +		N_("Unstage deletion [y,n,q,a,d%s,?]? "),
> +		N_("Unstage this hunk [y,n,q,a,d%s,?]? "),
> +	},
> +	.edit_hunk_hint = N_("If the patch applies cleanly, the edited hunk "
> +			     "will immediately be marked for unstaging."),
> +	.help_patch_text =
> +		N_("y - unstage this hunk\n"
> +		   "n - do not unstage this hunk\n"
> +		   "q - quit; do not unstage this hunk or any of the remaining "
> +			"ones\n"
> +		   "a - unstage this hunk and all later hunks in the file\n"
> +		   "d - do not unstage this hunk or any of the later hunks in "
> +			"the file\n"),
> +};
> +
> +static struct patch_mode patch_mode_reset_nothead = {
> +	.diff = { "diff-index", "-R", "--cached", NULL },
> +	.apply = { "--cached", NULL },
> +	.apply_check = { "--cached", NULL },
> +	.is_reverse = 0,
> +	.index_only = 1,
> +	.prompt_mode = {
> +		N_("Apply mode change to index [y,n,q,a,d%s,?]? "),
> +		N_("Apply deletion to index [y,n,q,a,d%s,?]? "),
> +		N_("Apply this hunk to index [y,n,q,a,d%s,?]? "),
> +	},
> +	.edit_hunk_hint = N_("If the patch applies cleanly, the edited hunk "
> +			     "will immediately be marked for applying."),
> +	.help_patch_text =
> +		N_("y - apply this hunk to index\n"
> +		   "n - do not apply this hunk to index\n"
> +		   "q - quit; do not apply this hunk or any of the remaining "
> +			"ones\n"
> +		   "a - apply this hunk and all later hunks in the file\n"
> +		   "d - do not apply this hunk or any of the later hunks in "
> +			"the file\n"),
> +};