repository: move 'repository_format_precious_objects' to repo scope

The 'extensions.preciousObjects' setting when set true, prevents
operations that might drop objects from the object storage. This setting
is populated in the global variable
'repository_format_precious_objects'.

Move this global variable to repo scope by adding it to 'struct
repository and also refactor all the occurences accordingly.

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

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Ghanshyam Thakkar <shyamthakkar001@gmail.com>
Signed-off-by: Ayush Chandekar <ayu.chandekar@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/gc.c

@@ -998,7 +998,7 @@ int cmd_gc(int argc,
 	if (opts.detach <= 0 && !skip_foreground_tasks)
 		gc_foreground_tasks(&opts, &cfg);
 
-	if (!repository_format_precious_objects) {
+	if (!the_repository->repository_format_precious_objects) {
 		struct child_process repack_cmd = CHILD_PROCESS_INIT;
 
 		repack_cmd.git_cmd = 1;

builtin/prune.c

@@ -177,7 +177,7 @@ int cmd_prune(int argc,
 
 	argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
 
-	if (repository_format_precious_objects)
+	if (the_repository->repository_format_precious_objects)
 		die(_("cannot prune in a precious-objects repo"));
 
 	while (argc--) {

builtin/repack.c

@@ -1240,7 +1240,7 @@ int cmd_repack(int argc,
 	po_args.depth = xstrdup_or_null(opt_depth);
 	po_args.threads = xstrdup_or_null(opt_threads);
 
-	if (delete_redundant && repository_format_precious_objects)
+	if (delete_redundant && the_repository->repository_format_precious_objects)
 		die(_("cannot delete packs in a precious-objects repo"));
 
 	die_for_incompatible_opt3(unpack_unreachable || (pack_everything & LOOSEN_UNREACHABLE), "-A",

environment.c

@@ -37,7 +37,6 @@ int ignore_case;
 int assume_unchanged;
 int is_bare_repository_cfg = -1; /* unspecified */
 int warn_on_object_refname_ambiguity = 1;
-int repository_format_precious_objects;
 char *git_commit_encoding;
 char *git_log_output_encoding;
 char *apply_default_whitespace;

environment.h

@@ -189,8 +189,6 @@ extern enum object_creation_mode object_creation_mode;
 
 extern int grafts_keep_true_parents;
 
-extern int repository_format_precious_objects;
-
 const char *get_log_output_encoding(void);
 const char *get_commit_output_encoding(void);
 

repository.c

@@ -284,6 +284,7 @@ int repo_init(struct repository *repo,
 	repo_set_ref_storage_format(repo, format.ref_storage_format);
 	repo->repository_format_worktree_config = format.worktree_config;
 	repo->repository_format_relative_worktrees = format.relative_worktrees;
+	repo->repository_format_precious_objects = format.precious_objects;
 
 	/* take ownership of format.partial_clone */
 	repo->repository_format_partial_clone = format.partial_clone;

repository.h

@@ -151,6 +151,7 @@ struct repository {
 	/* Configurations */
 	int repository_format_worktree_config;
 	int repository_format_relative_worktrees;
+	int repository_format_precious_objects;
 
 	/* Indicate if a repository has a different 'commondir' from 'gitdir' */
 	unsigned different_commondir:1;

setup.c

@@ -753,7 +753,8 @@ static int check_repository_format_gently(const char *gitdir, struct repository_
 		die("%s", err.buf);
 	}
 
-	repository_format_precious_objects = candidate->precious_objects;
+	the_repository->repository_format_precious_objects = candidate->precious_objects;
+
 	string_list_clear(&candidate->unknown_extensions, 0);
 	string_list_clear(&candidate->v1_only_extensions, 0);
 
@@ -1864,6 +1865,8 @@ const char *setup_git_directory_gently(int *nongit_ok)
 			the_repository->repository_format_partial_clone =
 				repo_fmt.partial_clone;
 			repo_fmt.partial_clone = NULL;
+			the_repository->repository_format_precious_objects =
+				repo_fmt.precious_objects;
 		}
 	}
 	/*