apply.c: make init_apply_state() take a struct repository

We're moving away from the_index in this code. "struct index_state *"
could be added to struct apply_state. But let's aim long term and put
struct repository here instead so that we could even avoid more global
states in the future. The index will be available via
apply_state->repo->index.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

apply.c

@@ -76,10 +76,12 @@ static int parse_ignorewhitespace_option(struct apply_state *state,
 }
 
 int init_apply_state(struct apply_state *state,
+		     struct repository *repo,
 		     const char *prefix)
 {
 	memset(state, 0, sizeof(*state));
 	state->prefix = prefix;
+	state->repo = repo;
 	state->apply = 1;
 	state->line_termination = '\n';
 	state->p_value = 1;

apply.h

@@ -1,6 +1,8 @@
 #ifndef APPLY_H
 #define APPLY_H
 
+struct repository;
+
 enum apply_ws_error_action {
 	nowarn_ws_error,
 	warn_on_ws_error,
@@ -62,6 +64,7 @@ struct apply_state {
 	int unsafe_paths;
 
 	/* Other non boolean parameters */
+	struct repository *repo;
 	const char *index_file;
 	enum apply_verbosity apply_verbosity;
 	const char *fake_ancestor;
@@ -116,6 +119,7 @@ int apply_parse_options(int argc, const char **argv,
 			int *force_apply, int *options,
 			const char * const *apply_usage);
 int init_apply_state(struct apply_state *state,
+		     struct repository *repo,
 		     const char *prefix);
 void clear_apply_state(struct apply_state *state);
 int check_apply_state(struct apply_state *state, int force_apply);

builtin/am.c

@@ -1464,7 +1464,7 @@ static int run_apply(const struct am_state *state, const char *index_file)
 	int force_apply = 0;
 	int options = 0;
 
-	if (init_apply_state(&apply_state, NULL))
+	if (init_apply_state(&apply_state, the_repository, NULL))
 		BUG("init_apply_state() failed");
 
 	argv_array_push(&apply_opts, "apply");

builtin/apply.c

@@ -16,7 +16,7 @@ int cmd_apply(int argc, const char **argv, const char *prefix)
 	int ret;
 	struct apply_state state;
 
-	if (init_apply_state(&state, prefix))
+	if (init_apply_state(&state, the_repository, prefix))
 		exit(128);
 
 	argc = apply_parse_options(argc, argv,