environment: move access to "core.sparsecheckoutcone" into repo_settings

The setting "core.sparsecheckoutcone" is stored in the global
`core_sparse_checkout_cone` and is populated in config.c. Refactor the
code to store it in the variable `sparse_checkout_cone` in the struct
`repo_settings`.

Call `prepare_repo_settings()` where necessary to ensure the `struct
repo_settings` is initialized before use:
- In "dir.c", the function accessing the setting is usually called after
  `prepare_repo_settings()`, except for one code path in
  "unpack-trees.c", so add a call there.

Avoid redundant calls to `prepare_repo_settings()` where it is already
present:
- In "builtin/mv.c" and "builtin/sparse-checkout.c", it is already
  invoked in their respective `cmd_*()` functions.
- In "sparse-index.c", `prepare_repo_settings` is already called before
  the setting is accessed.

This change is part of an ongoing effort to eliminate global variables,
improve modularity and help libify the codebase.

Mentored-by: Christian Couder <[email protected]>
Mentored-by: Ghanshyam Thakkar <[email protected]>
Signed-off-by: Ayush Chandekar <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: ayu-ch

builtin/grep.c

@@ -491,7 +491,7 @@ static int grep_submodule(struct grep_opt *opt,
 	 *	dictate the behavior for the submodule, making it "forget" its
 	 *	sparse-checkout state.
 	 *
-	 * 3. "core_sparse_checkout_cone"
+	 * 3. "settings.sparse_checkout_cone"
 	 *	ditto.
 	 *
 	 * Note that this list is not exhaustive.

builtin/mv.c

@@ -573,7 +573,7 @@ int cmd_mv(int argc,
 		prepare_repo_settings(the_repository);
 		if (ignore_sparse &&
 		    the_repository->settings.sparse_checkout &&
-		    core_sparse_checkout_cone) {
+		    the_repository->settings.sparse_checkout_cone) {
 			/*
 			 * NEEDSWORK: we are *not* paying attention to
 			 * "out-to-out" move (<source> is out-of-cone and

builtin/sparse-checkout.c

@@ -71,7 +71,7 @@ static int sparse_checkout_list(int argc, const char **argv, const char *prefix,
 
 	memset(&pl, 0, sizeof(pl));
 
-	pl.use_cone_patterns = core_sparse_checkout_cone;
+	pl.use_cone_patterns = the_repository->settings.sparse_checkout_cone;
 
 	sparse_filename = get_sparse_checkout_filename();
 	res = add_patterns_from_file_to_list(sparse_filename, "", 0, &pl, NULL, 0);
@@ -352,7 +352,7 @@ static int write_patterns_and_update(struct pattern_list *pl)
 	if (!fp)
 		die_errno(_("unable to fdopen %s"), get_lock_file_path(&lk));
 
-	if (core_sparse_checkout_cone)
+	if (the_repository->settings.sparse_checkout_cone)
 		write_cone_to_file(fp, pl);
 	else
 		write_patterns_to_file(fp, pl);
@@ -398,15 +398,15 @@ static int set_config(enum sparse_checkout_mode mode)
 static enum sparse_checkout_mode update_cone_mode(int *cone_mode) {
 	/* If not specified, use previous definition of cone mode */
 	if (*cone_mode == -1 && the_repository->settings.sparse_checkout)
-		*cone_mode = core_sparse_checkout_cone;
+		*cone_mode = the_repository->settings.sparse_checkout_cone;
 
 	/* Set cone/non-cone mode appropriately */
 	the_repository->settings.sparse_checkout = 1;
 	if (*cone_mode == 1 || *cone_mode == -1) {
-		core_sparse_checkout_cone = 1;
+		the_repository->settings.sparse_checkout_cone = 1;
 		return MODE_CONE_PATTERNS;
 	}
-	core_sparse_checkout_cone = 0;
+	the_repository->settings.sparse_checkout_cone = 0;
 	return MODE_ALL_PATTERNS;
 }
 
@@ -572,7 +572,7 @@ static void add_patterns_from_input(struct pattern_list *pl,
 				    FILE *file)
 {
 	int i;
-	if (core_sparse_checkout_cone) {
+	if (the_repository->settings.sparse_checkout_cone) {
 		struct strbuf line = STRBUF_INIT;
 
 		hashmap_init(&pl->recursive_hashmap, pl_hashmap_cmp, NULL, 0);
@@ -637,7 +637,7 @@ static void add_patterns_cone_mode(int argc, const char **argv,
 				use_stdin ? stdin : NULL);
 
 	memset(&existing, 0, sizeof(existing));
-	existing.use_cone_patterns = core_sparse_checkout_cone;
+	existing.use_cone_patterns = the_repository->settings.sparse_checkout_cone;
 
 	if (add_patterns_from_file_to_list(sparse_filename, "", 0,
 					   &existing, NULL, 0))
@@ -683,7 +683,7 @@ static int modify_pattern_list(struct strvec *args, int use_stdin,
 
 	switch (m) {
 	case ADD:
-		if (core_sparse_checkout_cone)
+		if (the_repository->settings.sparse_checkout_cone)
 			add_patterns_cone_mode(args->nr, args->v, pl, use_stdin);
 		else
 			add_patterns_literal(args->nr, args->v, pl, use_stdin);
@@ -719,7 +719,7 @@ static void sanitize_paths(struct strvec *args,
 	if (!args->nr)
 		return;
 
-	if (prefix && *prefix && core_sparse_checkout_cone) {
+	if (prefix && *prefix && the_repository->settings.sparse_checkout_cone) {
 		/*
 		 * The args are not pathspecs, so unfortunately we
 		 * cannot imitate how cmd_add() uses parse_pathspec().
@@ -736,10 +736,10 @@ static void sanitize_paths(struct strvec *args,
 	if (skip_checks)
 		return;
 
-	if (prefix && *prefix && !core_sparse_checkout_cone)
+	if (prefix && *prefix && !the_repository->settings.sparse_checkout_cone)
 		die(_("please run from the toplevel directory in non-cone mode"));
 
-	if (core_sparse_checkout_cone) {
+	if (the_repository->settings.sparse_checkout_cone) {
 		for (i = 0; i < args->nr; i++) {
 			if (args->v[i][0] == '/')
 				die(_("specify directories rather than patterns (no leading slash)"));
@@ -761,7 +761,7 @@ static void sanitize_paths(struct strvec *args,
 		if (S_ISSPARSEDIR(ce->ce_mode))
 			continue;
 
-		if (core_sparse_checkout_cone)
+		if (the_repository->settings.sparse_checkout_cone)
 			die(_("'%s' is not a directory; to treat it as a directory anyway, rerun with --skip-checks"), args->v[i]);
 		else
 			warning(_("pass a leading slash before paths such as '%s' if you want a single file (see NON-CONE PROBLEMS in the git-sparse-checkout manual)."), args->v[i]);
@@ -864,7 +864,7 @@ static int sparse_checkout_set(int argc, const char **argv, const char *prefix,
 	 * non-cone mode, if nothing is specified, manually select just the
 	 * top-level directory (much as 'init' would do).
 	 */
-	if (!core_sparse_checkout_cone && !set_opts.use_stdin && argc == 0) {
+	if (!the_repository->settings.sparse_checkout_cone && !set_opts.use_stdin && argc == 0) {
 		for (int i = 0; i < default_patterns_nr; i++)
 			strvec_push(&patterns, default_patterns[i]);
 	} else {
@@ -1041,7 +1041,7 @@ static int sparse_checkout_check_rules(int argc, const char **argv, const char *
 		check_rules_opts.cone_mode = 1;
 
 	update_cone_mode(&check_rules_opts.cone_mode);
-	pl.use_cone_patterns = core_sparse_checkout_cone;
+	pl.use_cone_patterns = the_repository->settings.sparse_checkout_cone;
 	if (check_rules_opts.rules_file) {
 		fp = xfopen(check_rules_opts.rules_file, "r");
 		add_patterns_from_input(&pl, argc, argv, fp);

config.c

@@ -1612,11 +1612,6 @@ static int git_default_core_config(const char *var, const char *value,
 		return 0;
 	}
 
-	if (!strcmp(var, "core.sparsecheckoutcone")) {
-		core_sparse_checkout_cone = git_config_bool(var, value);
-		return 0;
-	}
-
 	if (!strcmp(var, "core.precomposeunicode")) {
 		precomposed_unicode = git_config_bool(var, value);
 		return 0;

dir.c

@@ -3460,7 +3460,7 @@ int get_sparse_checkout_patterns(struct pattern_list *pl)
 	int res;
 	char *sparse_filename = get_sparse_checkout_filename();
 
-	pl->use_cone_patterns = core_sparse_checkout_cone;
+	pl->use_cone_patterns = the_repository->settings.sparse_checkout_cone;
 	res = add_patterns_from_file_to_list(sparse_filename, "", 0, pl, NULL, 0);
 
 	free(sparse_filename);

environment.c

@@ -64,7 +64,6 @@ enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
 #endif
 enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
 int grafts_keep_true_parents;
-int core_sparse_checkout_cone;
 int sparse_expect_files_outside_of_patterns;
 int merge_log_config = -1;
 int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */

environment.h

@@ -160,7 +160,6 @@ extern int precomposed_unicode;
 extern int protect_hfs;
 extern int protect_ntfs;
 
-extern int core_sparse_checkout_cone;
 extern int sparse_expect_files_outside_of_patterns;
 
 enum rebase_setup_type {

repo-settings.c

@@ -82,6 +82,7 @@ void prepare_repo_settings(struct repository *r)
 		      r->settings.pack_use_bitmap_boundary_traversal);
 	repo_cfg_bool(r, "core.usereplacerefs", &r->settings.read_replace_refs, 1);
 	repo_cfg_bool(r, "core.sparsecheckout", &r->settings.sparse_checkout, 0);
+	repo_cfg_bool(r, "core.sparsecheckoutcone", &r->settings.sparse_checkout_cone, 0);
 
 	/*
 	 * The GIT_TEST_MULTI_PACK_INDEX variable is special in that

repo-settings.h

@@ -67,7 +67,9 @@ struct repo_settings {
 	unsigned long big_file_threshold;
 
 	char *hooks_path;
+
 	int sparse_checkout;
+	int sparse_checkout_cone;
 };
 #define REPO_SETTINGS_INIT { \
 	.shared_repository = -1, \

sparse-index.c

@@ -151,7 +151,7 @@ static int index_has_unmerged_entries(struct index_state *istate)
 int is_sparse_index_allowed(struct index_state *istate, int flags)
 {
 	prepare_repo_settings(istate->repo);
-	if (!istate->repo->settings.sparse_checkout || !core_sparse_checkout_cone)
+	if (!istate->repo->settings.sparse_checkout || !istate->repo->settings.sparse_checkout_cone)
 		return 0;
 
 	if (!(flags & SPARSE_INDEX_MEMORY_ONLY)) {