Merge branch 'other-command-p-in-c'

At this stage on the journey to a fully built-in `git add`, we already
have everything we need, including the `--interactive` and `--patch`
options, as long as the `add.interactive.useBuiltin` setting is set to
`true` (kind of a "turned off feature flag", which it will be for a
while, until we get confident enough that the built-in version does the
job, and retire the Perl script).

However, the internal `add--interactive` helper is also used to back the
`--patch` option of `git stash`, `git reset` and `git checkout`.

This patch series brings them "online".

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

add-interactive.c

@@ -839,7 +839,7 @@ static int run_patch(struct add_i_state *s, const struct pathspec *ps,
 		parse_pathspec(&ps_selected,
 			       PATHSPEC_ALL_MAGIC & ~PATHSPEC_LITERAL,
 			       PATHSPEC_LITERAL_PATH, "", args.argv);
-		res = run_add_p(s->r, &ps_selected);
+		res = run_add_p(s->r, ADD_P_STAGE, NULL, &ps_selected);
 		argv_array_clear(&args);
 		clear_pathspec(&ps_selected);
 	}

add-interactive.h

@@ -31,6 +31,15 @@ const char *get_add_i_color(enum color_add_i ix);
 struct repository;
 struct pathspec;
 int run_add_i(struct repository *r, const struct pathspec *ps);
-int run_add_p(struct repository *r, const struct pathspec *ps);
+
+enum add_p_mode {
+	ADD_P_STAGE,
+	ADD_P_STASH,
+	ADD_P_RESET,
+	ADD_P_CHECKOUT,
+};
+
+int run_add_p(struct repository *r, enum add_p_mode mode,
+	      const char *revision, const struct pathspec *ps);
 
 #endif