environment: move access to "core.sharedRepository" into repo settings

Similar as with the preceding commit, we track "core.sharedRepository"
via a pair of global variables. Move them into `struct repo_settings` so
that we can instead track them per-repository.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/init-db.c

@@ -132,8 +132,8 @@ int cmd_init_db(int argc,
 				 * and we know shared_repository should always be 0;
 				 * but just in case we play safe.
 				 */
-				saved = get_shared_repository();
-				set_shared_repository(0);
+				saved = repo_settings_get_shared_repository(the_repository);
+				repo_settings_set_shared_repository(the_repository, 0);
 				switch (safe_create_leading_directories_const(argv[0])) {
 				case SCLD_OK:
 				case SCLD_PERMS:
@@ -145,7 +145,7 @@ int cmd_init_db(int argc,
 					die_errno(_("cannot mkdir %s"), argv[0]);
 					break;
 				}
-				set_shared_repository(saved);
+				repo_settings_set_shared_repository(the_repository, saved);
 				if (mkdir(argv[0], 0777) < 0)
 					die_errno(_("cannot mkdir %s"), argv[0]);
 				mkdir_tried = 1;
@@ -175,7 +175,7 @@ int cmd_init_db(int argc,
 	}
 
 	if (init_shared_repository != -1)
-		set_shared_repository(init_shared_repository);
+		repo_settings_set_shared_repository(the_repository, init_shared_repository);
 
 	/*
 	 * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR

builtin/log.c

@@ -2309,8 +2309,8 @@ int cmd_format_patch(int argc,
 		 * We consider <outdir> as 'outside of gitdir', therefore avoid
 		 * applying adjust_shared_perm in s-c-l-d.
 		 */
-		saved = get_shared_repository();
-		set_shared_repository(0);
+		saved = repo_settings_get_shared_repository(the_repository);
+		repo_settings_set_shared_repository(the_repository, 0);
 		switch (safe_create_leading_directories_const(output_directory)) {
 		case SCLD_OK:
 		case SCLD_EXISTS:
@@ -2319,7 +2319,7 @@ int cmd_format_patch(int argc,
 			die(_("could not create leading directories "
 			      "of '%s'"), output_directory);
 		}
-		set_shared_repository(saved);
+		repo_settings_set_shared_repository(the_repository, saved);
 		if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
 			die_errno(_("could not create directory '%s'"),
 				  output_directory);

environment.c

@@ -206,32 +206,6 @@ const char *get_commit_output_encoding(void)
 	return git_commit_encoding ? git_commit_encoding : "UTF-8";
 }
 
-static int the_shared_repository = PERM_UMASK;
-static int need_shared_repository_from_config = 1;
-
-void set_shared_repository(int value)
-{
-	the_shared_repository = value;
-	need_shared_repository_from_config = 0;
-}
-
-int get_shared_repository(void)
-{
-	if (need_shared_repository_from_config) {
-		const char *var = "core.sharedrepository";
-		const char *value;
-		if (!git_config_get_value(var, &value))
-			the_shared_repository = git_config_perm(var, value);
-		need_shared_repository_from_config = 0;
-	}
-	return the_shared_repository;
-}
-
-void reset_shared_repository(void)
-{
-	need_shared_repository_from_config = 1;
-}
-
 int use_optional_locks(void)
 {
 	return git_env_bool(GIT_OPTIONAL_LOCKS_ENVIRONMENT, 1);

environment.h

@@ -134,16 +134,6 @@ void setup_git_env(const char *git_dir);
  */
 int have_git_dir(void);
 
-/*
- * Accessors for the core.sharedrepository config which lazy-load the value
- * from the config (if not already set). The "reset" function can be
- * used to unset "set" or cached value, meaning that the value will be loaded
- * fresh from the config file on the next call to get_shared_repository().
- */
-void set_shared_repository(int value);
-int get_shared_repository(void);
-void reset_shared_repository(void);
-
 extern int is_bare_repository_cfg;
 int is_bare_repository(void);
 extern char *git_work_tree_cfg;

path.c

@@ -844,17 +844,17 @@ int calc_shared_perm(int mode)
 {
 	int tweak;
 
-	if (get_shared_repository() < 0)
-		tweak = -get_shared_repository();
+	if (repo_settings_get_shared_repository(the_repository) < 0)
+		tweak = -repo_settings_get_shared_repository(the_repository);
 	else
-		tweak = get_shared_repository();
+		tweak = repo_settings_get_shared_repository(the_repository);
 
 	if (!(mode & S_IWUSR))
 		tweak &= ~0222;
 	if (mode & S_IXUSR)
 		/* Copy read bits to execute bits */
 		tweak |= (tweak & 0444) >> 2;
-	if (get_shared_repository() < 0)
+	if (repo_settings_get_shared_repository(the_repository) < 0)
 		mode = (mode & ~0777) | tweak;
 	else
 		mode |= tweak;
@@ -867,7 +867,7 @@ int adjust_shared_perm(const char *path)
 {
 	int old_mode, new_mode;
 
-	if (!get_shared_repository())
+	if (!repo_settings_get_shared_repository(the_repository))
 		return 0;
 	if (get_st_mode_bits(path, &old_mode) < 0)
 		return -1;

repo-settings.c

@@ -4,6 +4,7 @@
 #include "repository.h"
 #include "midx.h"
 #include "pack-objects.h"
+#include "setup.h"
 
 static void repo_cfg_bool(struct repository *r, const char *key, int *dest,
 			  int def)
@@ -181,3 +182,28 @@ const char *repo_settings_get_hooks_path(struct repository *repo)
 		repo_config_get_pathname(repo, "core.hookspath", &repo->settings.hooks_path);
 	return repo->settings.hooks_path;
 }
+
+int repo_settings_get_shared_repository(struct repository *repo)
+{
+	if (!repo->settings.shared_repository_initialized) {
+		const char *var = "core.sharedrepository";
+		const char *value;
+		if (!repo_config_get_value(repo, var, &value))
+			repo->settings.shared_repository = git_config_perm(var, value);
+		else
+			repo->settings.shared_repository = PERM_UMASK;
+		repo->settings.shared_repository_initialized = 1;
+	}
+	return repo->settings.shared_repository;
+}
+
+void repo_settings_set_shared_repository(struct repository *repo, int value)
+{
+	repo->settings.shared_repository = value;
+	repo->settings.shared_repository_initialized = 1;
+}
+
+void repo_settings_reset_shared_repository(struct repository *repo)
+{
+	repo->settings.shared_repository_initialized = 0;
+}

repo-settings.h

@@ -37,6 +37,9 @@ struct repo_settings {
 	int pack_use_bitmap_boundary_traversal;
 	int pack_use_multi_pack_reuse;
 
+	int shared_repository;
+	int shared_repository_initialized;
+
 	/*
 	 * Does this repository have core.useReplaceRefs=true (on by
 	 * default)? This provides a repository-scoped version of this
@@ -65,6 +68,7 @@ struct repo_settings {
 	char *hooks_path;
 };
 #define REPO_SETTINGS_INIT { \
+	.shared_repository = -1, \
 	.index_version = -1, \
 	.core_untracked_cache = UNTRACKED_CACHE_KEEP, \
 	.fetch_negotiation_algorithm = FETCH_NEGOTIATION_CONSECUTIVE, \
@@ -84,4 +88,9 @@ int repo_settings_get_warn_ambiguous_refs(struct repository *repo);
 /* Read the value for "core.hooksPath". */
 const char *repo_settings_get_hooks_path(struct repository *repo);
 
+/* Read, set or reset the value for "core.sharedRepository". */
+int repo_settings_get_shared_repository(struct repository *repo);
+void repo_settings_set_shared_repository(struct repository *repo, int value);
+void repo_settings_reset_shared_repository(struct repository *repo);
+
 #endif /* REPO_SETTINGS_H */

setup.c

@@ -2332,7 +2332,7 @@ static int create_default_files(const char *template_path,
 	 */
 	copy_templates(template_path);
 	git_config_clear();
-	reset_shared_repository();
+	repo_settings_reset_shared_repository(the_repository);
 	git_config(git_default_config, NULL);
 
 	reinit = is_reinit();
@@ -2342,7 +2342,8 @@ static int create_default_files(const char *template_path,
 	 * values we might have just re-read from the config.
 	 */
 	if (init_shared_repository != -1)
-		set_shared_repository(init_shared_repository);
+		repo_settings_set_shared_repository(the_repository,
+						    init_shared_repository);
 
 	is_bare_repository_cfg = !work_tree;
 
@@ -2350,7 +2351,7 @@ static int create_default_files(const char *template_path,
 	 * We would have created the above under user's umask -- under
 	 * shared-repository settings, we would need to fix them up.
 	 */
-	if (get_shared_repository()) {
+	if (repo_settings_get_shared_repository(the_repository)) {
 		adjust_shared_perm(repo_get_git_dir(the_repository));
 	}
 
@@ -2597,7 +2598,7 @@ int init_db(const char *git_dir, const char *real_git_dir,
 					  initial_branch, flags & INIT_DB_QUIET);
 	create_object_directory();
 
-	if (get_shared_repository()) {
+	if (repo_settings_get_shared_repository(the_repository)) {
 		char buf[10];
 		/* We do not spell "group" and such, so that
 		 * the configuration can be read by older version
@@ -2605,12 +2606,12 @@ int init_db(const char *git_dir, const char *real_git_dir,
 		 * and compatibility values for PERM_GROUP and
 		 * PERM_EVERYBODY.
 		 */
-		if (get_shared_repository() < 0)
+		if (repo_settings_get_shared_repository(the_repository) < 0)
 			/* force to the mode value */
-			xsnprintf(buf, sizeof(buf), "0%o", -get_shared_repository());
-		else if (get_shared_repository() == PERM_GROUP)
+			xsnprintf(buf, sizeof(buf), "0%o", -repo_settings_get_shared_repository(the_repository));
+		else if (repo_settings_get_shared_repository(the_repository) == PERM_GROUP)
 			xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_GROUP);
-		else if (get_shared_repository() == PERM_EVERYBODY)
+		else if (repo_settings_get_shared_repository(the_repository) == PERM_EVERYBODY)
 			xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_EVERYBODY);
 		else
 			BUG("invalid value for shared_repository");
@@ -2622,12 +2623,12 @@ int init_db(const char *git_dir, const char *real_git_dir,
 		int len = strlen(git_dir);
 
 		if (reinit)
-			printf(get_shared_repository()
+			printf(repo_settings_get_shared_repository(the_repository)
 			       ? _("Reinitialized existing shared Git repository in %s%s\n")
 			       : _("Reinitialized existing Git repository in %s%s\n"),
 			       git_dir, len && git_dir[len-1] != '/' ? "/" : "");
 		else
-			printf(get_shared_repository()
+			printf(repo_settings_get_shared_repository(the_repository)
 			       ? _("Initialized empty shared Git repository in %s%s\n")
 			       : _("Initialized empty Git repository in %s%s\n"),
 			       git_dir, len && git_dir[len-1] != '/' ? "/" : "");