Merge branch 'ps/environ-wo-the-repository'

Code clean-up.

* ps/environ-wo-the-repository: (21 commits)
  environment: stop storing "core.notesRef" globally
  environment: stop storing "core.warnAmbiguousRefs" globally
  environment: stop storing "core.preferSymlinkRefs" globally
  environment: stop storing "core.logAllRefUpdates" globally
  refs: stop modifying global `log_all_ref_updates` variable
  branch: stop modifying `log_all_ref_updates` variable
  repo-settings: track defaults close to `struct repo_settings`
  repo-settings: split out declarations into a standalone header
  environment: guard state depending on a repository
  environment: reorder header to split out `the_repository`-free section
  environment: move `set_git_dir()` and related into setup layer
  environment: make `get_git_namespace()` self-contained
  environment: move object database functions into object layer
  config: make dependency on repo in `read_early_config()` explicit
  config: document `read_early_config()` and `read_very_early_config()`
  environment: make `get_git_work_tree()` accept a repository
  environment: make `get_graft_file()` accept a repository
  environment: make `get_index_file()` accept a repository
  environment: make `get_object_directory()` accept a repository
  environment: make `get_git_common_dir()` accept a repository
  ...

alias.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "alias.h"
 #include "config.h"
@@ -37,7 +39,7 @@ char *alias_lookup(const char *alias)
 {
 	struct config_alias_data data = { alias, NULL };
 
-	read_early_config(config_alias_cb, &data);
+	read_early_config(the_repository, config_alias_cb, &data);
 
 	return data.v;
 }
@@ -46,7 +48,7 @@ void list_aliases(struct string_list *list)
 {
 	struct config_alias_data data = { NULL, NULL, list };
 
-	read_early_config(config_alias_cb, &data);
+	read_early_config(the_repository, config_alias_cb, &data);
 }
 
 void quote_cmdline(struct strbuf *buf, const char **argv)

apply.c

@@ -30,6 +30,7 @@
 #include "path.h"
 #include "quote.h"
 #include "read-cache.h"
+#include "repository.h"
 #include "rerere.h"
 #include "apply.h"
 #include "entry.h"
@@ -4113,7 +4114,7 @@ static int read_apply_cache(struct apply_state *state)
 {
 	if (state->index_file)
 		return read_index_from(state->repo->index, state->index_file,
-				       get_git_dir());
+				       repo_get_git_dir(the_repository));
 	else
 		return repo_read_index(state->repo);
 }

branch.c

@@ -601,6 +601,7 @@ void create_branch(struct repository *r,
 	int forcing = 0;
 	struct ref_transaction *transaction;
 	struct strbuf err = STRBUF_INIT;
+	int flags = 0;
 	char *msg;
 
 	if (track == BRANCH_TRACK_OVERRIDE)
@@ -619,7 +620,7 @@ void create_branch(struct repository *r,
 		goto cleanup;
 
 	if (reflog)
-		log_all_ref_updates = LOG_REFS_NORMAL;
+		flags |= REF_FORCE_CREATE_REFLOG;
 
 	if (forcing)
 		msg = xstrfmt("branch: Reset to %s", start_name);
@@ -630,7 +631,7 @@ void create_branch(struct repository *r,
 	if (!transaction ||
 		ref_transaction_update(transaction, ref.buf,
 					&oid, forcing ? NULL : null_oid(),
-					NULL, NULL, 0, msg, &err) ||
+					NULL, NULL, flags, msg, &err) ||
 		ref_transaction_commit(transaction, &err))
 		die("%s", err.buf);
 	ref_transaction_free(transaction);

builtin/am.c

@@ -1544,7 +1544,8 @@ static int run_apply(const struct am_state *state, const char *index_file)
 	if (index_file) {
 		/* Reload index as apply_all_patches() will have modified it. */
 		discard_index(the_repository->index);
-		read_index_from(the_repository->index, index_file, get_git_dir());
+		read_index_from(the_repository->index, index_file,
+				repo_get_git_dir(the_repository));
 	}
 
 	return 0;
@@ -1587,7 +1588,7 @@ static int fall_back_threeway(const struct am_state *state, const char *index_pa
 		return error("could not build fake ancestor");
 
 	discard_index(the_repository->index);
-	read_index_from(the_repository->index, index_path, get_git_dir());
+	read_index_from(the_repository->index, index_path, repo_get_git_dir(the_repository));
 
 	if (write_index_as_tree(&bases[0], the_repository->index, index_path, 0, NULL))
 		return error(_("Repository lacks necessary blobs to fall back on 3-way merge."));
@@ -1667,7 +1668,9 @@ static void do_commit(const struct am_state *state)
 	if (!state->no_verify && run_hooks(the_repository, "pre-applypatch"))
 		exit(1);
 
-	if (write_index_as_tree(&tree, the_repository->index, get_index_file(), 0, NULL))
+	if (write_index_as_tree(&tree, the_repository->index,
+				repo_get_index_file(the_repository),
+				0, NULL))
 		die(_("git write-tree failed to write a tree"));
 
 	if (!repo_get_oid_commit(the_repository, "HEAD", &parent)) {
@@ -2077,7 +2080,9 @@ static int clean_index(const struct object_id *head, const struct object_id *rem
 	if (fast_forward_to(head_tree, head_tree, 1))
 		return -1;
 
-	if (write_index_as_tree(&index, the_repository->index, get_index_file(), 0, NULL))
+	if (write_index_as_tree(&index, the_repository->index,
+				repo_get_index_file(the_repository),
+				0, NULL))
 		return -1;
 
 	index_tree = parse_tree_indirect(&index);

builtin/blame.c

@@ -1081,7 +1081,7 @@ parse_done:
 			path = add_prefix(prefix, argv[1]);
 			argv[1] = argv[2];
 		} else {	/* (2a) */
-			if (argc == 2 && is_a_rev(argv[1]) && !get_git_work_tree())
+			if (argc == 2 && is_a_rev(argv[1]) && !repo_get_work_tree(the_repository))
 				die("missing <path> to blame");
 			path = add_prefix(prefix, argv[argc - 1]);
 		}

builtin/checkout.c

@@ -23,6 +23,7 @@
 #include "read-cache.h"
 #include "refs.h"
 #include "remote.h"
+#include "repo-settings.h"
 #include "resolve-undo.h"
 #include "revision.h"
 #include "setup.h"
@@ -950,11 +951,13 @@ static void update_refs_for_switch(const struct checkout_opts *opts,
 	const char *old_desc, *reflog_msg;
 	if (opts->new_branch) {
 		if (opts->new_orphan_branch) {
+			enum log_refs_config log_all_ref_updates =
+				repo_settings_get_log_all_ref_updates(the_repository);
 			char *refname;
 
 			refname = mkpathdup("refs/heads/%s", opts->new_orphan_branch);
 			if (opts->new_branch_log &&
-			    !should_autocreate_reflog(refname)) {
+			    !should_autocreate_reflog(log_all_ref_updates, refname)) {
 				int ret;
 				struct strbuf err = STRBUF_INIT;
 

builtin/commit-graph.c

@@ -1,7 +1,6 @@
 #include "builtin.h"
 #include "commit.h"
 #include "config.h"
-#include "environment.h"
 #include "gettext.h"
 #include "hex.h"
 #include "parse-options.h"
@@ -95,7 +94,7 @@ static int graph_verify(int argc, const char **argv, const char *prefix)
 		usage_with_options(builtin_commit_graph_verify_usage, options);
 
 	if (!opts.obj_dir)
-		opts.obj_dir = get_object_directory();
+		opts.obj_dir = repo_get_object_directory(the_repository);
 	if (opts.shallow)
 		flags |= COMMIT_GRAPH_VERIFY_SHALLOW;
 	if (opts.progress)
@@ -275,7 +274,7 @@ static int graph_write(int argc, const char **argv, const char *prefix)
 	if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
 		die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
 	if (!opts.obj_dir)
-		opts.obj_dir = get_object_directory();
+		opts.obj_dir = repo_get_object_directory(the_repository);
 	if (opts.append)
 		flags |= COMMIT_GRAPH_WRITE_APPEND;
 	if (opts.split)

builtin/commit.c

@@ -26,6 +26,7 @@
 #include "path.h"
 #include "preload-index.h"
 #include "read-cache.h"
+#include "repository.h"
 #include "string-list.h"
 #include "rerere.h"
 #include "unpack-trees.h"
@@ -407,7 +408,7 @@ static const char *prepare_index(const char **argv, const char *prefix,
 
 		discard_index(the_repository->index);
 		read_index_from(the_repository->index, get_lock_file_path(&index_lock),
-				get_git_dir());
+				repo_get_git_dir(the_repository));
 		if (cache_tree_update(the_repository->index, WRITE_TREE_SILENT) == 0) {
 			if (reopen_lock_file(&index_lock) < 0)
 				die(_("unable to write index file"));
@@ -472,7 +473,7 @@ static const char *prepare_index(const char **argv, const char *prefix,
 				       COMMIT_LOCK | SKIP_IF_UNCHANGED))
 			die(_("unable to write new index file"));
 		commit_style = COMMIT_AS_IS;
-		ret = get_index_file();
+		ret = repo_get_index_file(the_repository);
 		goto out;
 	}
 
@@ -534,7 +535,7 @@ static const char *prepare_index(const char **argv, const char *prefix,
 
 	discard_index(the_repository->index);
 	ret = get_lock_file_path(&false_lock);
-	read_index_from(the_repository->index, ret, get_git_dir());
+	read_index_from(the_repository->index, ret, repo_get_git_dir(the_repository));
 out:
 	string_list_clear(&partial, 0);
 	clear_pathspec(&pathspec);
@@ -1072,7 +1073,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 		 */
 		discard_index(the_repository->index);
 	}
-	read_index_from(the_repository->index, index_file, get_git_dir());
+	read_index_from(the_repository->index, index_file, repo_get_git_dir(the_repository));
 
 	if (cache_tree_update(the_repository->index, 0)) {
 		error(_("Error building trees"));
@@ -1873,8 +1874,8 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 
 	repo_rerere(the_repository, 0);
 	run_auto_maintenance(quiet);
-	run_commit_hook(use_editor, get_index_file(), NULL, "post-commit",
+	run_commit_hook(use_editor, repo_get_index_file(the_repository),
-			NULL);
+			NULL, "post-commit", NULL);
 	if (amend && !no_post_rewrite) {
 		commit_post_rewrite(the_repository, current_head, &oid);
 	}

builtin/config.c

@@ -807,8 +807,8 @@ static void location_options_init(struct config_location_options *opts,
 	else
 		opts->options.respect_includes = opts->respect_includes_opt;
 	if (startup_info->have_repository) {
-		opts->options.commondir = get_git_common_dir();
+		opts->options.commondir = repo_get_common_dir(the_repository);
-		opts->options.git_dir = get_git_dir();
+		opts->options.git_dir = repo_get_git_dir(the_repository);
 	}
 }
 

builtin/count-objects.c

@@ -7,7 +7,6 @@
 #include "builtin.h"
 #include "config.h"
 #include "dir.h"
-#include "environment.h"
 #include "gettext.h"
 #include "path.h"
 #include "repository.h"
@@ -116,7 +115,7 @@ int cmd_count_objects(int argc, const char **argv, const char *prefix)
 		report_linked_checkout_garbage(the_repository);
 	}
 
-	for_each_loose_file_in_objdir(get_object_directory(),
+	for_each_loose_file_in_objdir(repo_get_object_directory(the_repository),
 				      count_loose, count_cruft, NULL, NULL);
 
 	if (verbose) {

builtin/difftool.c

@@ -22,6 +22,7 @@
 #include "hex.h"
 #include "parse-options.h"
 #include "read-cache-ll.h"
+#include "repository.h"
 #include "sparse-index.h"
 #include "strvec.h"
 #include "strbuf.h"
@@ -214,7 +215,7 @@ static void changed_files(struct hashmap *result, const char *index_path,
 	struct child_process update_index = CHILD_PROCESS_INIT;
 	struct child_process diff_files = CHILD_PROCESS_INIT;
 	struct strbuf buf = STRBUF_INIT;
-	const char *git_dir = absolute_path(get_git_dir());
+	const char *git_dir = absolute_path(repo_get_git_dir(the_repository));
 	FILE *fp;
 
 	strvec_pushl(&update_index.args,
@@ -377,7 +378,7 @@ static int run_dir_diff(const char *extcmd, int symlinks, const char *prefix,
 	struct hashmap wt_modified, tmp_modified;
 	int indices_loaded = 0;
 
-	workdir = get_git_work_tree();
+	workdir = repo_get_work_tree(the_repository);
 
 	/* Setup temp directories */
 	tmp = getenv("TMPDIR");
@@ -737,8 +738,8 @@ int cmd_difftool(int argc, const char **argv, const char *prefix)
 
 	if (!no_index){
 		setup_work_tree();
-		setenv(GIT_DIR_ENVIRONMENT, absolute_path(get_git_dir()), 1);
+		setenv(GIT_DIR_ENVIRONMENT, absolute_path(repo_get_git_dir(the_repository)), 1);
-		setenv(GIT_WORK_TREE_ENVIRONMENT, absolute_path(get_git_work_tree()), 1);
+		setenv(GIT_WORK_TREE_ENVIRONMENT, absolute_path(repo_get_work_tree(the_repository)), 1);
 	} else if (dir_diff)
 		die(_("options '%s' and '%s' cannot be used together"), "--dir-diff", "--no-index");
 

builtin/fsmonitor--daemon.c

@@ -2,7 +2,6 @@
 #include "abspath.h"
 #include "config.h"
 #include "dir.h"
-#include "environment.h"
 #include "gettext.h"
 #include "parse-options.h"
 #include "fsmonitor-ll.h"
@@ -1291,7 +1290,8 @@ static int fsmonitor_run_daemon(void)
 
 	/* Prepare to (recursively) watch the <worktree-root> directory. */
 	strbuf_init(&state.path_worktree_watch, 0);
-	strbuf_addstr(&state.path_worktree_watch, absolute_path(get_git_work_tree()));
+	strbuf_addstr(&state.path_worktree_watch,
+		      absolute_path(repo_get_work_tree(the_repository)));
 	state.nr_paths_watching = 1;
 
 	strbuf_init(&state.alias.alias, 0);
@@ -1311,7 +1311,8 @@ static int fsmonitor_run_daemon(void)
 	strbuf_addstr(&state.path_gitdir_watch, "/.git");
 	if (!is_directory(state.path_gitdir_watch.buf)) {
 		strbuf_reset(&state.path_gitdir_watch);
-		strbuf_addstr(&state.path_gitdir_watch, absolute_path(get_git_dir()));
+		strbuf_addstr(&state.path_gitdir_watch,
+			      absolute_path(repo_get_git_dir(the_repository)));
 		state.nr_paths_watching = 2;
 	}
 

builtin/gc.c

@@ -2132,7 +2132,7 @@ static int schtasks_schedule_task(const char *exec_path, enum schedule_priority
 	get_schedule_cmd(&cmd, NULL);
 
 	strbuf_addf(&tfilename, "%s/schedule_%s_XXXXXX",
-		    get_git_common_dir(), frequency);
+		    repo_get_common_dir(the_repository), frequency);
 	tfile = xmks_tempfile(tfilename.buf);
 	strbuf_release(&tfilename);
 

builtin/init-db.c

@@ -231,9 +231,9 @@ int cmd_init_db(int argc, const char **argv, const char *prefix)
 			set_git_work_tree(work_tree);
 		else
 			set_git_work_tree(git_work_tree_cfg);
-		if (access(get_git_work_tree(), X_OK))
+		if (access(repo_get_work_tree(the_repository), X_OK))
 			die_errno (_("Cannot access work tree '%s'"),
-				   get_git_work_tree());
+				   repo_get_work_tree(the_repository));
 	}
 	else {
 		if (real_git_dir)

builtin/merge.c

@@ -17,6 +17,7 @@
 #include "object-name.h"
 #include "parse-options.h"
 #include "lockfile.h"
+#include "repository.h"
 #include "run-command.h"
 #include "hook.h"
 #include "diff.h"
@@ -695,7 +696,9 @@ static int read_tree_trivial(struct object_id *common, struct object_id *head,
 
 static void write_tree_trivial(struct object_id *oid)
 {
-	if (write_index_as_tree(oid, the_repository->index, get_index_file(), 0, NULL))
+	if (write_index_as_tree(oid, the_repository->index,
+				repo_get_index_file(the_repository),
+				0, NULL))
 		die(_("git write-tree failed to write a tree"));
 }
 
@@ -757,7 +760,7 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common,
 		}
 		if (write_locked_index(the_repository->index, &lock,
 				       COMMIT_LOCK | SKIP_IF_UNCHANGED))
-			die(_("unable to write %s"), get_index_file());
+			die(_("unable to write %s"), repo_get_index_file(the_repository));
 		return clean ? 0 : 1;
 	} else {
 		return try_merge_command(the_repository,
@@ -839,7 +842,7 @@ static void write_merge_heads(struct commit_list *);
 static void prepare_to_commit(struct commit_list *remoteheads)
 {
 	struct strbuf msg = STRBUF_INIT;
-	const char *index_file = get_index_file();
+	const char *index_file = repo_get_index_file(the_repository);
 
 	if (!no_verify) {
 		int invoked_hook;
@@ -855,7 +858,8 @@ static void prepare_to_commit(struct commit_list *remoteheads)
 		if (invoked_hook)
 			discard_index(the_repository->index);
 	}
-	read_index_from(the_repository->index, index_file, get_git_dir());
+	read_index_from(the_repository->index, index_file,
+			repo_get_git_dir(the_repository));
 	strbuf_addbuf(&msg, &merge_msg);
 	if (squash)
 		BUG("the control must not reach here under --squash");
@@ -878,8 +882,8 @@ static void prepare_to_commit(struct commit_list *remoteheads)
 		append_signoff(&msg, ignored_log_message_bytes(msg.buf, msg.len), 0);
 	write_merge_heads(remoteheads);
 	write_file_buf(git_path_merge_msg(the_repository), msg.buf, msg.len);
-	if (run_commit_hook(0 < option_edit, get_index_file(), NULL,
+	if (run_commit_hook(0 < option_edit, repo_get_index_file(the_repository),
-			    "prepare-commit-msg",
+			    NULL, "prepare-commit-msg",
 			    git_path_merge_msg(the_repository), "merge", NULL))
 		abort_commit(remoteheads, NULL);
 	if (0 < option_edit) {
@@ -887,7 +891,7 @@ static void prepare_to_commit(struct commit_list *remoteheads)
 			abort_commit(remoteheads, NULL);
 	}
 
-	if (!no_verify && run_commit_hook(0 < option_edit, get_index_file(),
+	if (!no_verify && run_commit_hook(0 < option_edit, repo_get_index_file(the_repository),
 					  NULL, "commit-msg",
 					  git_path_merge_msg(the_repository), NULL))
 		abort_commit(remoteheads, NULL);

builtin/multi-pack-index.c

@@ -1,7 +1,6 @@
 #include "builtin.h"
 #include "abspath.h"
 #include "config.h"
-#include "environment.h"
 #include "gettext.h"
 #include "parse-options.h"
 #include "midx.h"
@@ -9,6 +8,7 @@
 #include "trace2.h"
 #include "object-store-ll.h"
 #include "replace-object.h"
+#include "repository.h"
 
 #define BUILTIN_MIDX_WRITE_USAGE \
 	N_("git multi-pack-index [<options>] write [--preferred-pack=<pack>]" \
@@ -63,7 +63,7 @@ static int parse_object_dir(const struct option *opt, const char *arg,
 	char **value = opt->value;
 	free(*value);
 	if (unset)
-		*value = xstrdup(get_object_directory());
+		*value = xstrdup(repo_get_object_directory(the_repository));
 	else
 		*value = real_pathdup(arg, 1);
 	return 0;

builtin/notes.c

@@ -897,6 +897,7 @@ static int merge(int argc, const char **argv, const char *prefix)
 			      1, PARSE_OPT_NONEG),
 		OPT_END()
 	};
+	char *notes_ref;
 
 	argc = parse_options(argc, argv, prefix, options,
 			     git_notes_merge_usage, 0);
@@ -924,7 +925,8 @@ static int merge(int argc, const char **argv, const char *prefix)
 	if (do_commit)
 		return merge_commit(&o);
 
-	o.local_ref = default_notes_ref();
+	notes_ref = default_notes_ref(the_repository);
+	o.local_ref = notes_ref;
 	strbuf_addstr(&remote_ref, argv[0]);
 	expand_loose_notes_ref(&remote_ref);
 	o.remote_ref = remote_ref.buf;
@@ -953,7 +955,7 @@ static int merge(int argc, const char **argv, const char *prefix)
 	}
 
 	strbuf_addf(&msg, "notes: Merged notes from %s into %s",
-		    remote_ref.buf, default_notes_ref());
+		    remote_ref.buf, notes_ref);
 	strbuf_add(&(o.commit_msg), msg.buf + 7, msg.len - 7); /* skip "notes: " */
 
 	result = notes_merge(&o, t, &result_oid);
@@ -961,7 +963,7 @@ static int merge(int argc, const char **argv, const char *prefix)
 	if (result >= 0) /* Merge resulted (trivially) in result_oid */
 		/* Update default notes ref with new commit */
 		refs_update_ref(get_main_ref_store(the_repository), msg.buf,
-				default_notes_ref(), &result_oid, NULL, 0,
+				notes_ref, &result_oid, NULL, 0,
 				UPDATE_REFS_DIE_ON_ERR);
 	else { /* Merge has unresolved conflicts */
 		struct worktree **worktrees;
@@ -973,14 +975,14 @@ static int merge(int argc, const char **argv, const char *prefix)
 		/* Store ref-to-be-updated into .git/NOTES_MERGE_REF */
 		worktrees = get_worktrees();
 		wt = find_shared_symref(worktrees, "NOTES_MERGE_REF",
-					default_notes_ref());
+					notes_ref);
 		if (wt)
 			die(_("a notes merge into %s is already in-progress at %s"),
-			    default_notes_ref(), wt->path);
+			    notes_ref, wt->path);
 		free_worktrees(worktrees);
-		if (refs_update_symref(get_main_ref_store(the_repository), "NOTES_MERGE_REF", default_notes_ref(), NULL))
+		if (refs_update_symref(get_main_ref_store(the_repository), "NOTES_MERGE_REF", notes_ref, NULL))
 			die(_("failed to store link to current notes ref (%s)"),
-			    default_notes_ref());
+			    notes_ref);
 		fprintf(stderr, _("Automatic notes merge failed. Fix conflicts in %s "
 				  "and commit the result with 'git notes merge --commit', "
 				  "or abort the merge with 'git notes merge --abort'.\n"),
@@ -988,6 +990,7 @@ static int merge(int argc, const char **argv, const char *prefix)
 	}
 
 	free_notes(t);
+	free(notes_ref);
 	strbuf_release(&remote_ref);
 	strbuf_release(&msg);
 	return result < 0; /* return non-zero on conflicts */
@@ -1084,6 +1087,7 @@ static int prune(int argc, const char **argv, const char *prefix)
 static int get_ref(int argc, const char **argv, const char *prefix)
 {
 	struct option options[] = { OPT_END() };
+	char *notes_ref;
 	argc = parse_options(argc, argv, prefix, options,
 			     git_notes_get_ref_usage, 0);
 
@@ -1092,7 +1096,9 @@ static int get_ref(int argc, const char **argv, const char *prefix)
 		usage_with_options(git_notes_get_ref_usage, options);
 	}
 
-	puts(default_notes_ref());
+	notes_ref = default_notes_ref(the_repository);
+	puts(notes_ref);
+	free(notes_ref);
 	return 0;
 }
 

builtin/pack-objects.c

@@ -3968,7 +3968,7 @@ static int add_loose_object(const struct object_id *oid, const char *path,
  */
 static void add_unreachable_loose_objects(void)
 {
-	for_each_loose_file_in_objdir(get_object_directory(),
+	for_each_loose_file_in_objdir(repo_get_object_directory(the_repository),
 				      add_loose_object,
 				      NULL, NULL, NULL);
 }

builtin/prune.c

@@ -193,12 +193,12 @@ int cmd_prune(int argc, const char **argv, const char *prefix)
 		revs.exclude_promisor_objects = 1;
 	}
 
-	for_each_loose_file_in_objdir(get_object_directory(), prune_object,
+	for_each_loose_file_in_objdir(repo_get_object_directory(the_repository),
-				      prune_cruft, prune_subdir, &revs);
+				      prune_object, prune_cruft, prune_subdir, &revs);
 
 	prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
-	remove_temporary_files(get_object_directory());
+	remove_temporary_files(repo_get_object_directory(the_repository));
-	s = mkpathdup("%s/pack", get_object_directory());
+	s = mkpathdup("%s/pack", repo_get_object_directory(the_repository));
 	remove_temporary_files(s);
 	free(s);
 

builtin/repack.c

@@ -1260,7 +1260,7 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 	if (write_midx && write_bitmaps) {
 		struct strbuf path = STRBUF_INIT;
 
-		strbuf_addf(&path, "%s/%s_XXXXXX", get_object_directory(),
+		strbuf_addf(&path, "%s/%s_XXXXXX", repo_get_object_directory(the_repository),
 			    "bitmap-ref-tips");
 
 		refs_snapshot = xmks_tempfile(path.buf);
@@ -1269,7 +1269,7 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 		strbuf_release(&path);
 	}
 
-	packdir = mkpathdup("%s/pack", get_object_directory());
+	packdir = mkpathdup("%s/pack", repo_get_object_directory(the_repository));
 	packtmp_name = xstrfmt(".tmp-%d-pack", (int)getpid());
 	packtmp = mkpathdup("%s/%s", packdir, packtmp_name);
 
@@ -1539,7 +1539,8 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 		unsigned flags = 0;
 		if (git_env_bool(GIT_TEST_MULTI_PACK_INDEX_WRITE_INCREMENTAL, 0))
 			flags |= MIDX_WRITE_INCREMENTAL;
-		write_midx_file(get_object_directory(), NULL, NULL, flags);
+		write_midx_file(repo_get_object_directory(the_repository),
+				NULL, NULL, flags);
 	}
 
 cleanup:

builtin/replace.c

@@ -11,7 +11,6 @@
 #include "builtin.h"
 #include "config.h"
 #include "editor.h"
-#include "environment.h"
 #include "gettext.h"
 #include "hex.h"
 #include "refs.h"
@@ -514,7 +513,7 @@ static int create_graft(int argc, const char **argv, int force, int gentle)
 
 static int convert_graft_file(int force)
 {
-	const char *graft_file = get_graft_file(the_repository);
+	const char *graft_file = repo_get_graft_file(the_repository);
 	FILE *fp = fopen_or_warn(graft_file, "r");
 	struct strbuf buf = STRBUF_INIT, err = STRBUF_INIT;
 	struct strvec args = STRVEC_INIT;

builtin/reset.c

@@ -26,6 +26,7 @@
 #include "object-name.h"
 #include "parse-options.h"
 #include "path.h"
+#include "repository.h"
 #include "unpack-trees.h"
 #include "cache-tree.h"
 #include "setup.h"
@@ -441,7 +442,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
 	else
 		trace2_cmd_mode(reset_type_names[reset_type]);
 
-	if (reset_type != SOFT && (reset_type != MIXED || get_git_work_tree()))
+	if (reset_type != SOFT && (reset_type != MIXED || repo_get_work_tree(the_repository)))
 		setup_work_tree();
 
 	if (reset_type == MIXED && is_bare_repository())
@@ -474,7 +475,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
 				goto cleanup;
 			}
 			the_repository->index->updated_skipworktree = 1;
-			if (!no_refresh && get_git_work_tree()) {
+			if (!no_refresh && repo_get_work_tree(the_repository)) {
 				uint64_t t_begin, t_delta_in_ms;
 
 				t_begin = getnanotime();

builtin/rev-parse.c

@@ -19,6 +19,8 @@
 #include "path.h"
 #include "diff.h"
 #include "read-cache-ll.h"
+#include "repo-settings.h"
+#include "repository.h"
 #include "revision.h"
 #include "setup.h"
 #include "split-index.h"
@@ -898,7 +900,8 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 			}
 			if (opt_with_value(arg, "--abbrev-ref", &arg)) {
 				abbrev_ref = 1;
-				abbrev_ref_strict = warn_ambiguous_refs;
+				abbrev_ref_strict =
+					repo_settings_get_warn_ambiguous_refs(the_repository);
 				if (arg) {
 					if (!strcmp(arg, "strict"))
 						abbrev_ref_strict = 1;
@@ -966,7 +969,7 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 				continue;
 			}
 			if (!strcmp(arg, "--show-toplevel")) {
-				const char *work_tree = get_git_work_tree();
+				const char *work_tree = repo_get_work_tree(the_repository);
 				if (work_tree)
 					print_path(work_tree, prefix, format, DEFAULT_UNMODIFIED);
 				else
@@ -991,7 +994,7 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 				const char *pfx = prefix;
 				if (!is_inside_work_tree()) {
 					const char *work_tree =
-						get_git_work_tree();
+						repo_get_work_tree(the_repository);
 					if (work_tree)
 						printf("%s\n", work_tree);
 					continue;
@@ -1042,7 +1045,7 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 				continue;
 			}
 			if (!strcmp(arg, "--git-common-dir")) {
-				print_path(get_git_common_dir(), prefix, format, DEFAULT_RELATIVE_IF_SHARED);
+				print_path(repo_get_common_dir(the_repository), prefix, format, DEFAULT_RELATIVE_IF_SHARED);
 				continue;
 			}
 			if (!strcmp(arg, "--is-inside-git-dir")) {

builtin/stash.c

@@ -19,6 +19,7 @@
 #include "entry.h"
 #include "preload-index.h"
 #include "read-cache.h"
+#include "repository.h"
 #include "rerere.h"
 #include "revision.h"
 #include "setup.h"
@@ -539,8 +540,8 @@ static int do_apply_stash(const char *prefix, struct stash_info *info,
 					 NULL, NULL, NULL))
 		return error(_("could not write index"));
 
-	if (write_index_as_tree(&c_tree, the_repository->index, get_index_file(), 0,
+	if (write_index_as_tree(&c_tree, the_repository->index,
-				NULL))
+				repo_get_index_file(the_repository), 0, NULL))
 		return error(_("cannot apply a stash in the middle of a merge"));
 
 	if (index) {
@@ -565,7 +566,7 @@ static int do_apply_stash(const char *prefix, struct stash_info *info,
 			discard_index(the_repository->index);
 			repo_read_index(the_repository);
 			if (write_index_as_tree(&index_tree, the_repository->index,
-						get_index_file(), 0, NULL))
+						repo_get_index_file(the_repository), 0, NULL))
 				return error(_("could not save index tree"));
 
 			reset_head();
@@ -640,9 +641,9 @@ restore_untracked:
 		cp.git_cmd = 1;
 		cp.dir = prefix;
 		strvec_pushf(&cp.env, GIT_WORK_TREE_ENVIRONMENT"=%s",
-			     absolute_path(get_git_work_tree()));
+			     absolute_path(repo_get_work_tree(the_repository)));
 		strvec_pushf(&cp.env, GIT_DIR_ENVIRONMENT"=%s",
-			     absolute_path(get_git_dir()));
+			     absolute_path(repo_get_git_dir(the_repository)));
 		strvec_push(&cp.args, "status");
 		run_command(&cp);
 	}
@@ -1405,8 +1406,8 @@ static int do_create_stash(const struct pathspec *ps, struct strbuf *stash_msg_b
 
 	strbuf_addf(&commit_tree_label, "index on %s\n", msg.buf);
 	commit_list_insert(head_commit, &parents);
-	if (write_index_as_tree(&info->i_tree, the_repository->index, get_index_file(), 0,
+	if (write_index_as_tree(&info->i_tree, the_repository->index,
-				NULL) ||
+				repo_get_index_file(the_repository), 0, NULL) ||
 	    commit_tree(commit_tree_label.buf, commit_tree_label.len,
 			&info->i_tree, parents, &info->i_commit, NULL, NULL)) {
 		if (!quiet)
@@ -1904,7 +1905,7 @@ int cmd_stash(int argc, const char **argv, const char *prefix)
 	prepare_repo_settings(the_repository);
 	the_repository->settings.command_requires_full_index = 0;
 
-	index_file = get_index_file();
+	index_file = repo_get_index_file(the_repository);
 	strbuf_addf(&stash_index_path, "%s.stash.%" PRIuMAX, index_file,
 		    (uintmax_t)pid);
 

builtin/submodule--helper.c

@@ -1709,7 +1709,7 @@ static int clone_submodule(const struct module_clone_data *clone_data,
 		exit(128);
 
 	if (!is_absolute_path(clone_data->path))
-		clone_data_path = to_free = xstrfmt("%s/%s", get_git_work_tree(),
+		clone_data_path = to_free = xstrfmt("%s/%s", repo_get_work_tree(the_repository),
 						    clone_data->path);
 
 	if (validate_submodule_git_dir(sm_gitdir, clone_data->name) < 0)

builtin/update-index.c

@@ -1194,7 +1194,7 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
 				  "remove or change it, if you really want to "
 				  "enable the untracked cache"));
 		add_untracked_cache(the_repository->index);
-		report(_("Untracked cache enabled for '%s'"), get_git_work_tree());
+		report(_("Untracked cache enabled for '%s'"), repo_get_work_tree(the_repository));
 		break;
 	default:
 		BUG("bad untracked_cache value: %d", untracked_cache);
@@ -1239,7 +1239,7 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
 		if (newfd < 0) {
 			if (refresh_args.flags & REFRESH_QUIET)
 				exit(128);
-			unable_to_lock_die(get_index_file(), lock_error);
+			unable_to_lock_die(repo_get_index_file(the_repository), lock_error);
 		}
 		if (write_locked_index(the_repository->index, &lock_file, COMMIT_LOCK))
 			die("Unable to write new index file");

builtin/worktree.c

@@ -219,7 +219,7 @@ static void prune_worktrees(void)
 	}
 	closedir(dir);
 
-	strbuf_add_absolute_path(&main_path, get_git_common_dir());
+	strbuf_add_absolute_path(&main_path, repo_get_common_dir(the_repository));
 	/* massage main worktree absolute path to match 'gitdir' content */
 	strbuf_strip_suffix(&main_path, "/.");
 	string_list_append_nodup(&kept, strbuf_detach(&main_path, NULL));
@@ -492,7 +492,7 @@ static int add_worktree(const char *path, const char *refname,
 	strbuf_addf(&sb, "%s/gitdir", sb_repo.buf);
 	strbuf_realpath(&realpath, sb_git.buf, 1);
 	write_file(sb.buf, "%s", realpath.buf);
-	strbuf_realpath(&realpath, get_git_common_dir(), 1);
+	strbuf_realpath(&realpath, repo_get_common_dir(the_repository), 1);
 	write_file(sb_git.buf, "gitdir: %s/worktrees/%s",
 		   realpath.buf, name);
 	strbuf_reset(&sb);

builtin/write-tree.c

@@ -6,7 +6,6 @@
 
 #include "builtin.h"
 #include "config.h"
-#include "environment.h"
 #include "gettext.h"
 #include "hex.h"
 #include "tree.h"
@@ -44,7 +43,8 @@ int cmd_write_tree(int argc, const char **argv, const char *cmd_prefix)
 	prepare_repo_settings(the_repository);
 	the_repository->settings.command_requires_full_index = 0;
 
-	ret = write_index_as_tree(&oid, the_repository->index, get_index_file(),
+	ret = write_index_as_tree(&oid, the_repository->index,
+				  repo_get_index_file(the_repository),
 				  flags, tree_prefix);
 	switch (ret) {
 	case 0:

bulk-checkin.c

@@ -75,7 +75,7 @@ static void flush_bulk_checkin_packfile(struct bulk_checkin_packfile *state)
 		close(fd);
 	}
 
-	strbuf_addf(&packname, "%s/pack/pack-%s.", get_object_directory(),
+	strbuf_addf(&packname, "%s/pack/pack-%s.", repo_get_object_directory(the_repository),
 		    hash_to_hex(hash));
 	finish_tmp_packfile(&packname, state->pack_tmp_name,
 			    state->written, state->nr_written,
@@ -113,7 +113,7 @@ static void flush_batch_fsync(void)
 	 * to ensure that the data in each new object file is durable before
 	 * the final name is visible.
 	 */
-	strbuf_addf(&temp_path, "%s/bulk_fsync_XXXXXX", get_object_directory());
+	strbuf_addf(&temp_path, "%s/bulk_fsync_XXXXXX", repo_get_object_directory(the_repository));
 	temp = xmks_tempfile(temp_path.buf);
 	fsync_or_die(get_tempfile_fd(temp), get_tempfile_path(temp));
 	delete_tempfile(&temp);

bundle-uri.c

@@ -4,7 +4,6 @@
 #include "bundle-uri.h"
 #include "bundle.h"
 #include "copy.h"
-#include "environment.h"
 #include "gettext.h"
 #include "refs.h"
 #include "run-command.h"
@@ -14,6 +13,7 @@
 #include "fetch-pack.h"
 #include "remote.h"
 #include "trace2.h"
+#include "object-store-ll.h"
 
 static struct {
 	enum bundle_list_heuristic heuristic;

cache-tree.c

@@ -1,7 +1,6 @@
 #define USE_THE_REPOSITORY_VARIABLE
 
 #include "git-compat-util.h"
-#include "environment.h"
 #include "hex.h"
 #include "lockfile.h"
 #include "tree.h"
@@ -12,6 +11,7 @@
 #include "object-store-ll.h"
 #include "read-cache-ll.h"
 #include "replace-object.h"
+#include "repository.h"
 #include "promisor-remote.h"
 #include "trace.h"
 #include "trace2.h"
@@ -725,7 +725,8 @@ int write_index_as_tree(struct object_id *oid, struct index_state *index_state,
 
 	hold_lock_file_for_update(&lock_file, index_path, LOCK_DIE_ON_ERROR);
 
-	entries = read_index_from(index_state, index_path, get_git_dir());
+	entries = read_index_from(index_state, index_path,
+				  repo_get_git_dir(the_repository));
 	if (entries < 0) {
 		ret = WRITE_TREE_UNREADABLE_INDEX;
 		goto out;

commit.c

@@ -292,14 +292,14 @@ static int read_graft_file(struct repository *r, const char *graft_file)
 
 void prepare_commit_graft(struct repository *r)
 {
-	char *graft_file;
+	const char *graft_file;
 
 	if (r->parsed_objects->commit_graft_prepared)
 		return;
 	if (!startup_info->have_repository)
 		return;
 
-	graft_file = get_graft_file(r);
+	graft_file = repo_get_graft_file(r);
 	read_graft_file(r, graft_file);
 	/* make sure shallows are read */
 	is_repository_shallow(r);

compat/mingw.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "../git-compat-util.h"
 #include "win32.h"
 #include <aclapi.h>

compat/win32/path-utils.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "../../git-compat-util.h"
 #include "../../environment.h"
 

config.c

@@ -6,6 +6,8 @@
  *
  */
 
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "abspath.h"
 #include "advice.h"
@@ -1445,26 +1447,6 @@ static int git_default_core_config(const char *var, const char *value,
 		return 0;
 	}
 
-	if (!strcmp(var, "core.prefersymlinkrefs")) {
-		prefer_symlink_refs = git_config_bool(var, value);
-		return 0;
-	}
-
-	if (!strcmp(var, "core.logallrefupdates")) {
-		if (value && !strcasecmp(value, "always"))
-			log_all_ref_updates = LOG_REFS_ALWAYS;
-		else if (git_config_bool(var, value))
-			log_all_ref_updates = LOG_REFS_NORMAL;
-		else
-			log_all_ref_updates = LOG_REFS_NONE;
-		return 0;
-	}
-
-	if (!strcmp(var, "core.warnambiguousrefs")) {
-		warn_ambiguous_refs = git_config_bool(var, value);
-		return 0;
-	}
-
 	if (!strcmp(var, "core.abbrev")) {
 		if (!value)
 			return config_error_nonbool(var);
@@ -1573,14 +1555,6 @@ static int git_default_core_config(const char *var, const char *value,
 		return git_config_string(&check_roundtrip_encoding, var, value);
 	}
 
-	if (!strcmp(var, "core.notesref")) {
-		if (!value)
-			return config_error_nonbool(var);
-		free(notes_ref_name);
-		notes_ref_name = xstrdup(value);
-		return 0;
-	}
-
 	if (!strcmp(var, "core.editor")) {
 		FREE_AND_NULL(editor_program);
 		return git_config_string(&editor_program, var, value);
@@ -2202,7 +2176,7 @@ static void configset_iter(struct config_set *set, config_fn_t fn, void *data)
 	}
 }
 
-void read_early_config(config_fn_t cb, void *data)
+void read_early_config(struct repository *repo, config_fn_t cb, void *data)
 {
 	struct config_options opts = {0};
 	struct strbuf commondir = STRBUF_INIT;
@@ -2210,9 +2184,9 @@ void read_early_config(config_fn_t cb, void *data)
 
 	opts.respect_includes = 1;
 
-	if (have_git_dir()) {
+	if (repo && repo->gitdir) {
-		opts.commondir = get_git_common_dir();
+		opts.commondir = repo_get_common_dir(repo);
-		opts.git_dir = get_git_dir();
+		opts.git_dir = repo_get_git_dir(repo);
 	/*
 	 * When setup_git_directory() was not yet asked to discover the
 	 * GIT_DIR, we ask discover_git_directory() to figure out whether there
@@ -2232,10 +2206,6 @@ void read_early_config(config_fn_t cb, void *data)
 	strbuf_release(&gitdir);
 }
 
-/*
- * Read config but only enumerate system and global settings.
- * Omit any repo-local, worktree-local, or command-line settings.
- */
 void read_very_early_config(config_fn_t cb, void *data)
 {
 	struct config_options opts = { 0 };

config.h

@@ -192,7 +192,18 @@ int git_config_from_blob_oid(config_fn_t fn, const char *name,
 void git_config_push_parameter(const char *text);
 void git_config_push_env(const char *spec);
 int git_config_from_parameters(config_fn_t fn, void *data);
-void read_early_config(config_fn_t cb, void *data);
+
+/*
+ * Read config when the Git directory has not yet been set up. In case
+ * `the_repository` has not yet been set up, try to discover the Git
+ * directory to read the configuration from.
+ */
+void read_early_config(struct repository *repo, config_fn_t cb, void *data);
+
+/*
+ * Read config but only enumerate system and global settings.
+ * Omit any repo-local, worktree-local, or command-line settings.
+ */
 void read_very_early_config(config_fn_t cb, void *data);
 
 /**

dir.c

@@ -20,6 +20,7 @@
 #include "object-store-ll.h"
 #include "path.h"
 #include "refs.h"
+#include "repository.h"
 #include "wildmatch.h"
 #include "pathspec.h"
 #include "utf8.h"
@@ -2838,7 +2839,7 @@ static const char *get_ident_string(void)
 		return sb.buf;
 	if (uname(&uts) < 0)
 		die_errno(_("failed to get kernel name and information"));
-	strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),
+	strbuf_addf(&sb, "Location %s, system %s", repo_get_work_tree(the_repository),
 		    uts.sysname);
 	return sb.buf;
 }

environment.c

@@ -22,15 +22,9 @@
 #include "fmt-merge-msg.h"
 #include "commit.h"
 #include "strvec.h"
-#include "object-file.h"
-#include "object-store-ll.h"
 #include "path.h"
-#include "replace-object.h"
-#include "tmp-objdir.h"
 #include "chdir-notify.h"
 #include "setup.h"
-#include "shallow.h"
-#include "trace.h"
 #include "write-or-die.h"
 
 int trust_executable_bit = 1;
@@ -40,9 +34,7 @@ int has_symlinks = 1;
 int minimum_abbrev = 4, default_abbrev = -1;
 int ignore_case;
 int assume_unchanged;
-int prefer_symlink_refs;
 int is_bare_repository_cfg = -1; /* unspecified */
-int warn_ambiguous_refs = 1;
 int warn_on_object_refname_ambiguity = 1;
 int repository_format_precious_objects;
 char *git_commit_encoding;
@@ -75,7 +67,6 @@ enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
 #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
 #endif
 enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
-char *notes_ref_name;
 int grafts_keep_true_parents;
 int core_apply_sparse_checkout;
 int core_sparse_checkout_cone;
@@ -83,7 +74,6 @@ int sparse_expect_files_outside_of_patterns;
 int merge_log_config = -1;
 int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
 unsigned long pack_size_limit_cfg;
-enum log_refs_config log_all_ref_updates = LOG_REFS_UNSET;
 int max_allowed_tree_depth =
 #ifdef _MSC_VER
 	/*
@@ -123,8 +113,6 @@ int core_preload_index = 1;
 /* This is set by setup_git_dir_gently() and/or git_default_config() */
 char *git_work_tree_cfg;
 
-static char *git_namespace;
-
 /*
  * Repository-local GIT_* environment variables; see environment.h for details.
  */
@@ -147,27 +135,6 @@ const char * const local_repo_env[] = {
 	NULL
 };
 
-static char *expand_namespace(const char *raw_namespace)
-{
-	struct strbuf buf = STRBUF_INIT;
-	struct strbuf **components, **c;
-
-	if (!raw_namespace || !*raw_namespace)
-		return xstrdup("");
-
-	strbuf_addstr(&buf, raw_namespace);
-	components = strbuf_split(&buf, '/');
-	strbuf_reset(&buf);
-	for (c = components; *c; c++)
-		if (strcmp((*c)->buf, "/") != 0)
-			strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
-	strbuf_list_free(components);
-	if (check_refname_format(buf.buf, 0))
-		die(_("bad git namespace path \"%s\""), raw_namespace);
-	strbuf_addch(&buf, '/');
-	return strbuf_detach(&buf, NULL);
-}
-
 const char *getenv_safe(struct strvec *argv, const char *name)
 {
 	const char *value = getenv(name);
@@ -179,47 +146,10 @@ const char *getenv_safe(struct strvec *argv, const char *name)
 	return argv->v[argv->nr - 1];
 }
 
-void setup_git_env(const char *git_dir)
-{
-	char *git_replace_ref_base;
-	const char *shallow_file;
-	const char *replace_ref_base;
-	struct set_gitdir_args args = { NULL };
-	struct strvec to_free = STRVEC_INIT;
-
-	args.commondir = getenv_safe(&to_free, GIT_COMMON_DIR_ENVIRONMENT);
-	args.object_dir = getenv_safe(&to_free, DB_ENVIRONMENT);
-	args.graft_file = getenv_safe(&to_free, GRAFT_ENVIRONMENT);
-	args.index_file = getenv_safe(&to_free, INDEX_ENVIRONMENT);
-	args.alternate_db = getenv_safe(&to_free, ALTERNATE_DB_ENVIRONMENT);
-	if (getenv(GIT_QUARANTINE_ENVIRONMENT)) {
-		args.disable_ref_updates = 1;
-	}
-
-	repo_set_gitdir(the_repository, git_dir, &args);
-	strvec_clear(&to_free);
-
-	if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
-		disable_replace_refs();
-	replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
-	git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
-							  : "refs/replace/");
-	update_ref_namespace(NAMESPACE_REPLACE, git_replace_ref_base);
-
-	free(git_namespace);
-	git_namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
-	shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
-	if (shallow_file)
-		set_alternate_shallow_file(the_repository, shallow_file, 0);
-
-	if (git_env_bool(NO_LAZY_FETCH_ENVIRONMENT, 0))
-		fetch_if_missing = 0;
-}
-
 int is_bare_repository(void)
 {
 	/* if core.bare is not 'false', let's see if there is a work tree */
-	return is_bare_repository_cfg && !get_git_work_tree();
+	return is_bare_repository_cfg && !repo_get_work_tree(the_repository);
 }
 
 int have_git_dir(void)
@@ -228,25 +158,37 @@ int have_git_dir(void)
 		|| the_repository->gitdir;
 }
 
-const char *get_git_dir(void)
-{
-	if (!the_repository->gitdir)
-		BUG("git environment hasn't been setup");
-	return the_repository->gitdir;
-}
-
-const char *get_git_common_dir(void)
-{
-	if (!the_repository->commondir)
-		BUG("git environment hasn't been setup");
-	return the_repository->commondir;
-}
-
 const char *get_git_namespace(void)
 {
-	if (!git_namespace)
+	static const char *namespace;
-		BUG("git environment hasn't been setup");
+
-	return git_namespace;
+	struct strbuf buf = STRBUF_INIT;
+	struct strbuf **components, **c;
+	const char *raw_namespace;
+
+	if (namespace)
+		return namespace;
+
+	raw_namespace = getenv(GIT_NAMESPACE_ENVIRONMENT);
+	if (!raw_namespace || !*raw_namespace) {
+		namespace = "";
+		return namespace;
+	}
+
+	strbuf_addstr(&buf, raw_namespace);
+	components = strbuf_split(&buf, '/');
+	strbuf_reset(&buf);
+	for (c = components; *c; c++)
+		if (strcmp((*c)->buf, "/") != 0)
+			strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
+	strbuf_list_free(components);
+	if (check_refname_format(buf.buf, 0))
+		die(_("bad git namespace path \"%s\""), raw_namespace);
+	strbuf_addch(&buf, '/');
+
+	namespace = strbuf_detach(&buf, NULL);
+
+	return namespace;
 }
 
 const char *strip_namespace(const char *namespaced_ref)
@@ -257,129 +199,6 @@ const char *strip_namespace(const char *namespaced_ref)
 	return NULL;
 }
 
-static int git_work_tree_initialized;
-
-/*
- * Note.  This works only before you used a work tree.  This was added
- * primarily to support git-clone to work in a new repository it just
- * created, and is not meant to flip between different work trees.
- */
-void set_git_work_tree(const char *new_work_tree)
-{
-	if (git_work_tree_initialized) {
-		struct strbuf realpath = STRBUF_INIT;
-
-		strbuf_realpath(&realpath, new_work_tree, 1);
-		new_work_tree = realpath.buf;
-		if (strcmp(new_work_tree, the_repository->worktree))
-			die("internal error: work tree has already been set\n"
-			    "Current worktree: %s\nNew worktree: %s",
-			    the_repository->worktree, new_work_tree);
-		strbuf_release(&realpath);
-		return;
-	}
-	git_work_tree_initialized = 1;
-	repo_set_worktree(the_repository, new_work_tree);
-}
-
-const char *get_git_work_tree(void)
-{
-	return the_repository->worktree;
-}
-
-const char *get_object_directory(void)
-{
-	if (!the_repository->objects->odb)
-		BUG("git environment hasn't been setup");
-	return the_repository->objects->odb->path;
-}
-
-int odb_mkstemp(struct strbuf *temp_filename, const char *pattern)
-{
-	int fd;
-	/*
-	 * we let the umask do its job, don't try to be more
-	 * restrictive except to remove write permission.
-	 */
-	int mode = 0444;
-	git_path_buf(temp_filename, "objects/%s", pattern);
-	fd = git_mkstemp_mode(temp_filename->buf, mode);
-	if (0 <= fd)
-		return fd;
-
-	/* slow path */
-	/* some mkstemp implementations erase temp_filename on failure */
-	git_path_buf(temp_filename, "objects/%s", pattern);
-	safe_create_leading_directories(temp_filename->buf);
-	return xmkstemp_mode(temp_filename->buf, mode);
-}
-
-int odb_pack_keep(const char *name)
-{
-	int fd;
-
-	fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
-	if (0 <= fd)
-		return fd;
-
-	/* slow path */
-	safe_create_leading_directories_const(name);
-	return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
-}
-
-char *get_index_file(void)
-{
-	if (!the_repository->index_file)
-		BUG("git environment hasn't been setup");
-	return the_repository->index_file;
-}
-
-char *get_graft_file(struct repository *r)
-{
-	if (!r->graft_file)
-		BUG("git environment hasn't been setup");
-	return r->graft_file;
-}
-
-static void set_git_dir_1(const char *path)
-{
-	xsetenv(GIT_DIR_ENVIRONMENT, path, 1);
-	setup_git_env(path);
-}
-
-static void update_relative_gitdir(const char *name UNUSED,
-				   const char *old_cwd,
-				   const char *new_cwd,
-				   void *data UNUSED)
-{
-	char *path = reparent_relative_path(old_cwd, new_cwd, get_git_dir());
-	struct tmp_objdir *tmp_objdir = tmp_objdir_unapply_primary_odb();
-
-	trace_printf_key(&trace_setup_key,
-			 "setup: move $GIT_DIR to '%s'",
-			 path);
-	set_git_dir_1(path);
-	if (tmp_objdir)
-		tmp_objdir_reapply_primary_odb(tmp_objdir, old_cwd, new_cwd);
-	free(path);
-}
-
-void set_git_dir(const char *path, int make_realpath)
-{
-	struct strbuf realpath = STRBUF_INIT;
-
-	if (make_realpath) {
-		strbuf_realpath(&realpath, path, 1);
-		path = realpath.buf;
-	}
-
-	set_git_dir_1(path);
-	if (!is_absolute_path(path))
-		chdir_notify_register(NULL, update_relative_gitdir, NULL);
-
-	strbuf_release(&realpath);
-}
-
 const char *get_log_output_encoding(void)
 {
 	return git_log_output_encoding ? git_log_output_encoding

environment.h

@@ -1,22 +1,7 @@
 #ifndef ENVIRONMENT_H
 #define ENVIRONMENT_H
 
-struct repository;
+#include "repo-settings.h"
-struct strvec;
-
-/*
- * The character that begins a commented line in user-editable file
- * that is subject to stripspace.
- */
-extern const char *comment_line_str;
-extern char *comment_line_str_to_free;
-extern int auto_comment_line_char;
-
-/*
- * Wrapper of getenv() that returns a strdup value. This value is kept
- * in argv to be freed later.
- */
-const char *getenv_safe(struct strvec *argv, const char *name);
 
 /* Double-check local_repo_env below if you add to this list. */
 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
@@ -87,6 +72,8 @@ const char *getenv_safe(struct strvec *argv, const char *name);
  */
 #define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE"
 
+#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
+
 /*
  * Repository-local GIT_* environment variables; these will be cleared
  * when git spawns a sub-process that runs inside another repository.
@@ -95,6 +82,50 @@ const char *getenv_safe(struct strvec *argv, const char *name);
  */
 extern const char * const local_repo_env[];
 
+struct strvec;
+
+/*
+ * Wrapper of getenv() that returns a strdup value. This value is kept
+ * in argv to be freed later.
+ */
+const char *getenv_safe(struct strvec *argv, const char *name);
+
+/*
+ * Should we print an ellipsis after an abbreviated SHA-1 value
+ * when doing diff-raw output or indicating a detached HEAD?
+ */
+int print_sha1_ellipsis(void);
+
+/*
+ * Returns the boolean value of $GIT_OPTIONAL_LOCKS (or the default value).
+ */
+int use_optional_locks(void);
+
+const char *get_git_namespace(void);
+const char *strip_namespace(const char *namespaced_ref);
+
+/*
+ * TODO: All the below state either explicitly or implicitly relies on
+ * `the_repository`. We should eventually get rid of these and make the
+ * dependency on a repository explicit:
+ *
+ *   - `setup_git_env()` ideally shouldn't exist as it modifies global state,
+ *     namely the environment. The current process shouldn't ever access that
+ *     state via envvars though, but should instead consult a `struct
+ *     repository`. When spawning new processes, we would ideally also pass a
+ *     `struct repository` and then set up the environment variables for the
+ *     child process, only.
+ *
+ *   - `have_git_dir()` should not have to exist at all. Instead, we should
+ *     decide on whether or not we have a `struct repository`.
+ *
+ *   - All the global config variables should become tied to a repository. Like
+ *     this, we'd correctly honor repository-local configuration and be able to
+ *     distinguish configuration values from different repositories.
+ *
+ * Please do not add new global config variables here.
+ */
+# ifdef USE_THE_REPOSITORY_VARIABLE
 void setup_git_env(const char *git_dir);
 
 /*
@@ -103,21 +134,19 @@ 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;
-const char *get_git_dir(void);
-const char *get_git_common_dir(void);
-const char *get_object_directory(void);
-char *get_index_file(void);
-char *get_graft_file(struct repository *r);
-void set_git_dir(const char *path, int make_realpath);
-const char *get_git_namespace(void);
-const char *strip_namespace(const char *namespaced_ref);
-const char *get_git_work_tree(void);
-void set_git_work_tree(const char *tree);
-
-#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 
 /* Environment bits from configuration mechanism */
 extern int trust_executable_bit;
@@ -127,8 +156,6 @@ extern int has_symlinks;
 extern int minimum_abbrev, default_abbrev;
 extern int ignore_case;
 extern int assume_unchanged;
-extern int prefer_symlink_refs;
-extern int warn_ambiguous_refs;
 extern int warn_on_object_refname_ambiguity;
 extern char *apply_default_whitespace;
 extern char *apply_default_ignorewhitespace;
@@ -143,16 +170,6 @@ extern unsigned long big_file_threshold;
 extern unsigned long pack_size_limit_cfg;
 extern int max_allowed_tree_depth;
 
-/*
- * 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 core_preload_index;
 extern int precomposed_unicode;
 extern int protect_hfs;
@@ -162,25 +179,13 @@ extern int core_apply_sparse_checkout;
 extern int core_sparse_checkout_cone;
 extern int sparse_expect_files_outside_of_patterns;
 
-/*
- * Returns the boolean value of $GIT_OPTIONAL_LOCKS (or the default value).
- */
-int use_optional_locks(void);
-
-enum log_refs_config {
-	LOG_REFS_UNSET = -1,
-	LOG_REFS_NONE = 0,
-	LOG_REFS_NORMAL,
-	LOG_REFS_ALWAYS
-};
-extern enum log_refs_config log_all_ref_updates;
-
 enum rebase_setup_type {
 	AUTOREBASE_NEVER = 0,
 	AUTOREBASE_LOCAL,
 	AUTOREBASE_REMOTE,
 	AUTOREBASE_ALWAYS
 };
+extern enum rebase_setup_type autorebase;
 
 enum push_default_type {
 	PUSH_DEFAULT_NOTHING = 0,
@@ -190,38 +195,18 @@ enum push_default_type {
 	PUSH_DEFAULT_CURRENT,
 	PUSH_DEFAULT_UNSPECIFIED
 };
-
-extern enum rebase_setup_type autorebase;
 extern enum push_default_type push_default;
 
 enum object_creation_mode {
 	OBJECT_CREATION_USES_HARDLINKS = 0,
 	OBJECT_CREATION_USES_RENAMES = 1
 };
-
 extern enum object_creation_mode object_creation_mode;
 
-extern char *notes_ref_name;
-
 extern int grafts_keep_true_parents;
 
 extern int repository_format_precious_objects;
 
-/*
- * Create a temporary file rooted in the object database directory, or
- * die on failure. The filename is taken from "pattern", which should have the
- * usual "XXXXXX" trailer, and the resulting filename is written into the
- * "template" buffer. Returns the open descriptor.
- */
-int odb_mkstemp(struct strbuf *temp_filename, const char *pattern);
-
-/*
- * Create a pack .keep file named "name" (which should generally be the output
- * of odb_pack_name). Returns a file descriptor opened for writing, or -1 on
- * error.
- */
-int odb_pack_keep(const char *name);
-
 const char *get_log_output_encoding(void);
 const char *get_commit_output_encoding(void);
 
@@ -233,9 +218,12 @@ extern char *askpass_program;
 extern char *excludes_file;
 
 /*
- * Should we print an ellipsis after an abbreviated SHA-1 value
+ * The character that begins a commented line in user-editable file
- * when doing diff-raw output or indicating a detached HEAD?
+ * that is subject to stripspace.
  */
-int print_sha1_ellipsis(void);
+extern const char *comment_line_str;
+extern char *comment_line_str_to_free;
+extern int auto_comment_line_char;
 
-#endif
+# endif /* USE_THE_REPOSITORY_VARIABLE */
+#endif /* ENVIRONMENT_H */

fetch-pack.c

@@ -1839,7 +1839,7 @@ static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args,
 
 		string_list_append_nodup(pack_lockfiles,
 					 xstrfmt("%s/pack/pack-%s.keep",
-						 get_object_directory(),
+						 repo_get_object_directory(the_repository),
 						 packname));
 	}
 	string_list_clear(&packfile_uris, 0);

fsmonitor.c

@@ -8,6 +8,7 @@
 #include "fsmonitor.h"
 #include "fsmonitor-ipc.h"
 #include "name-hash.h"
+#include "repository.h"
 #include "run-command.h"
 #include "strbuf.h"
 #include "trace2.h"
@@ -169,7 +170,7 @@ static int query_fsmonitor_hook(struct repository *r,
 	strvec_pushf(&cp.args, "%d", version);
 	strvec_pushf(&cp.args, "%s", last_update);
 	cp.use_shell = 1;
-	cp.dir = get_git_work_tree();
+	cp.dir = repo_get_work_tree(the_repository);
 
 	trace2_region_enter("fsm_hook", "query", NULL);
 

help.c

@@ -618,7 +618,7 @@ const char *help_unknown_cmd(const char *cmd)
 	memset(&other_cmds, 0, sizeof(other_cmds));
 	memset(&aliases, 0, sizeof(aliases));
 
-	read_early_config(git_unknown_cmd_config, NULL);
+	read_early_config(the_repository, git_unknown_cmd_config, NULL);
 
 	/*
 	 * Disable autocorrection prompt in a non-interactive session

http-backend.c

@@ -601,7 +601,7 @@ static void get_head(struct strbuf *hdr, char *arg UNUSED)
 
 static void get_info_packs(struct strbuf *hdr, char *arg UNUSED)
 {
-	size_t objdirlen = strlen(get_object_directory());
+	size_t objdirlen = strlen(repo_get_object_directory(the_repository));
 	struct strbuf buf = STRBUF_INIT;
 	struct packed_git *p;
 	size_t cnt = 0;

name-hash.c

@@ -5,6 +5,9 @@
  *
  * Copyright (C) 2008 Linus Torvalds
  */
+
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "environment.h"
 #include "gettext.h"

notes.c

@@ -992,15 +992,16 @@ static int notes_display_config(const char *k, const char *v,
 	return 0;
 }
 
-const char *default_notes_ref(void)
+char *default_notes_ref(struct repository *repo)
 {
-	const char *notes_ref = NULL;
+	char *notes_ref = NULL;
+
 	if (!notes_ref)
-		notes_ref = getenv(GIT_NOTES_REF_ENVIRONMENT);
+		notes_ref = xstrdup_or_null(getenv(GIT_NOTES_REF_ENVIRONMENT));
 	if (!notes_ref)
-		notes_ref = notes_ref_name; /* value of core.notesRef config */
+		repo_config_get_string(repo, "core.notesref", &notes_ref);
 	if (!notes_ref)
-		notes_ref = GIT_NOTES_DEFAULT_REF;
+		notes_ref = xstrdup(GIT_NOTES_DEFAULT_REF);
 	return notes_ref;
 }
 
@@ -1010,13 +1011,14 @@ void init_notes(struct notes_tree *t, const char *notes_ref,
 	struct object_id oid, object_oid;
 	unsigned short mode;
 	struct leaf_node root_tree;
+	char *to_free = NULL;
 
 	if (!t)
 		t = &default_notes_tree;
 	assert(!t->initialized);
 
 	if (!notes_ref)
-		notes_ref = default_notes_ref();
+		notes_ref = to_free = default_notes_ref(the_repository);
 	update_ref_namespace(NAMESPACE_NOTES, xstrdup(notes_ref));
 
 	if (!combine_notes)
@@ -1033,7 +1035,7 @@ void init_notes(struct notes_tree *t, const char *notes_ref,
 
 	if (flags & NOTES_INIT_EMPTY ||
 	    repo_get_oid_treeish(the_repository, notes_ref, &object_oid))
-		return;
+		goto out;
 	if (flags & NOTES_INIT_WRITABLE && refs_read_ref(get_main_ref_store(the_repository), notes_ref, &object_oid))
 		die("Cannot use notes ref %s", notes_ref);
 	if (get_tree_entry(the_repository, &object_oid, "", &oid, &mode))
@@ -1043,6 +1045,9 @@ void init_notes(struct notes_tree *t, const char *notes_ref,
 	oidclr(&root_tree.key_oid, the_repository->hash_algo);
 	oidcpy(&root_tree.val_oid, &oid);
 	load_subtree(t, &root_tree, t->root, 0);
+
+out:
+	free(to_free);
 }
 
 struct notes_tree **load_notes_trees(struct string_list *refs, int flags)
@@ -1105,7 +1110,7 @@ void load_display_notes(struct display_notes_opt *opt)
 
 	if (!opt || opt->use_default_notes > 0 ||
 	    (opt->use_default_notes == -1 && !opt->extra_notes_refs.nr)) {
-		string_list_append(&display_notes_refs, default_notes_ref());
+		string_list_append_nodup(&display_notes_refs, default_notes_ref(the_repository));
 		display_ref_env = getenv(GIT_NOTES_DISPLAY_REF_ENVIRONMENT);
 		if (display_ref_env) {
 			string_list_add_refs_from_colon_sep(&display_notes_refs,

notes.h

@@ -4,6 +4,7 @@
 #include "string-list.h"
 
 struct object_id;
+struct repository;
 struct strbuf;
 
 /*
@@ -70,7 +71,7 @@ extern struct notes_tree {
  * 3. The value of the core.notesRef config variable, if set
  * 4. GIT_NOTES_DEFAULT_REF (i.e. "refs/notes/commits")
  */
-const char *default_notes_ref(void);
+char *default_notes_ref(struct repository *repo);
 
 /*
  * Flags controlling behaviour of notes tree initialization

object-file.c

@@ -419,6 +419,39 @@ enum scld_error safe_create_leading_directories_const(const char *path)
 	return result;
 }
 
+int odb_mkstemp(struct strbuf *temp_filename, const char *pattern)
+{
+	int fd;
+	/*
+	 * we let the umask do its job, don't try to be more
+	 * restrictive except to remove write permission.
+	 */
+	int mode = 0444;
+	git_path_buf(temp_filename, "objects/%s", pattern);
+	fd = git_mkstemp_mode(temp_filename->buf, mode);
+	if (0 <= fd)
+		return fd;
+
+	/* slow path */
+	/* some mkstemp implementations erase temp_filename on failure */
+	git_path_buf(temp_filename, "objects/%s", pattern);
+	safe_create_leading_directories(temp_filename->buf);
+	return xmkstemp_mode(temp_filename->buf, mode);
+}
+
+int odb_pack_keep(const char *name)
+{
+	int fd;
+
+	fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
+	if (0 <= fd)
+		return fd;
+
+	/* slow path */
+	safe_create_leading_directories_const(name);
+	return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
+}
+
 static void fill_loose_path(struct strbuf *buf, const struct object_id *oid)
 {
 	int i;
@@ -2053,7 +2086,7 @@ static int start_loose_object_common(struct strbuf *tmp_file,
 		else if (errno == EACCES)
 			return error(_("insufficient permission for adding "
 				       "an object to repository database %s"),
-				     get_object_directory());
+				     repo_get_object_directory(the_repository));
 		else
 			return error_errno(
 				_("unable to create temporary file"));
@@ -2228,7 +2261,7 @@ int stream_loose_object(struct input_stream *in_stream, size_t len,
 		prepare_loose_object_bulk_checkin();
 
 	/* Since oid is not determined, save tmp file to odb path. */
-	strbuf_addf(&filename, "%s/", get_object_directory());
+	strbuf_addf(&filename, "%s/", repo_get_object_directory(the_repository));
 	hdrlen = format_object_header(hdr, sizeof(hdr), OBJ_BLOB, len);
 
 	/*

object-name.c

@@ -20,6 +20,7 @@
 #include "pretty.h"
 #include "object-store-ll.h"
 #include "read-cache-ll.h"
+#include "repo-settings.h"
 #include "repository.h"
 #include "setup.h"
 #include "midx.h"
@@ -959,7 +960,7 @@ static int get_oid_basic(struct repository *r, const char *str, int len,
 	int fatal = !(flags & GET_OID_QUIETLY);
 
 	if (len == r->hash_algo->hexsz && !get_oid_hex(str, oid)) {
-		if (warn_ambiguous_refs && warn_on_object_refname_ambiguity) {
+		if (repo_settings_get_warn_ambiguous_refs(r) && warn_on_object_refname_ambiguity) {
 			refs_found = repo_dwim_ref(r, str, len, &tmp_oid, &real_ref, 0);
 			if (refs_found > 0) {
 				warning(warn_msg, len, str);
@@ -1020,7 +1021,7 @@ static int get_oid_basic(struct repository *r, const char *str, int len,
 	if (!refs_found)
 		return -1;
 
-	if (warn_ambiguous_refs && !(flags & GET_OID_QUIETLY) &&
+	if (repo_settings_get_warn_ambiguous_refs(r) && !(flags & GET_OID_QUIETLY) &&
 	    (refs_found > 1 ||
 	     !get_short_oid(r, str, len, &tmp_oid, GET_OID_QUIETLY)))
 		warning(warn_msg, len, str);

object-store-ll.h

@@ -231,6 +231,21 @@ struct raw_object_store {
 struct raw_object_store *raw_object_store_new(void);
 void raw_object_store_clear(struct raw_object_store *o);
 
+/*
+ * Create a temporary file rooted in the object database directory, or
+ * die on failure. The filename is taken from "pattern", which should have the
+ * usual "XXXXXX" trailer, and the resulting filename is written into the
+ * "template" buffer. Returns the open descriptor.
+ */
+int odb_mkstemp(struct strbuf *temp_filename, const char *pattern);
+
+/*
+ * Create a pack .keep file named "name" (which should generally be the output
+ * of odb_pack_name). Returns a file descriptor opened for writing, or -1 on
+ * error.
+ */
+int odb_pack_keep(const char *name);
+
 /*
  * Put in `buf` the name of the file in the local object database that
  * would be used to store a loose object with the specified oid.

pack-write.c

@@ -12,6 +12,7 @@
 #include "pack-objects.h"
 #include "pack-revindex.h"
 #include "path.h"
+#include "repository.h"
 #include "strbuf.h"
 
 void reset_pack_idx_option(struct pack_idx_option *opts)
@@ -473,7 +474,7 @@ char *index_pack_lockfile(int ip_out, int *is_well_formed)
 		packname[len-1] = 0;
 		if (skip_prefix(packname, "keep\t", &name))
 			return xstrfmt("%s/pack/pack-%s.keep",
-				       get_object_directory(), name);
+				       repo_get_object_directory(the_repository), name);
 		return NULL;
 	}
 	if (is_well_formed)

packfile.c

@@ -30,7 +30,7 @@ char *odb_pack_name(struct strbuf *buf,
 		    const char *ext)
 {
 	strbuf_reset(buf);
-	strbuf_addf(buf, "%s/pack/pack-%s.%s", get_object_directory(),
+	strbuf_addf(buf, "%s/pack/pack-%s.%s", repo_get_object_directory(the_repository),
 		    hash_to_hex(hash), ext);
 	return buf->buf;
 }

pager.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "config.h"
 #include "editor.h"
@@ -92,7 +94,8 @@ const char *git_pager(int stdout_is_tty)
 	pager = getenv("GIT_PAGER");
 	if (!pager) {
 		if (!pager_program)
-			read_early_config(core_pager_config, NULL);
+			read_early_config(the_repository,
+					  core_pager_config, NULL);
 		pager = pager_program;
 	}
 	if (!pager)
@@ -298,7 +301,7 @@ int check_pager_config(const char *cmd)
 	data.want = -1;
 	data.value = NULL;
 
-	read_early_config(pager_command_config, &data);
+	read_early_config(the_repository, pager_command_config, &data);
 
 	if (data.value)
 		pager_program = data.value;

path.c

@@ -2,6 +2,8 @@
  * Utilities for paths and pathnames
  */
 
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "abspath.h"
 #include "environment.h"

pathspec.c

@@ -495,9 +495,9 @@ static void init_pathspec_item(struct pathspec_item *item, unsigned flags,
 			if (!have_git_dir())
 				die(_("'%s' is outside the directory tree"),
 				    copyfrom);
-			hint_path = get_git_work_tree();
+			hint_path = repo_get_work_tree(the_repository);
 			if (!hint_path)
-				hint_path = get_git_dir();
+				hint_path = repo_get_git_dir(the_repository);
 			die(_("%s: '%s' is outside repository at '%s'"), elt,
 			    copyfrom, absolute_path(hint_path));
 		}

preload-index.c

@@ -1,6 +1,9 @@
 /*
  * Copyright (C) 2008 Linus Torvalds
  */
+
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "pathspec.h"
 #include "dir.h"

prompt.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "parse.h"
 #include "environment.h"

prune-packed.c

@@ -1,10 +1,12 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
-#include "environment.h"
 #include "gettext.h"
 #include "object-store-ll.h"
 #include "packfile.h"
 #include "progress.h"
 #include "prune-packed.h"
+#include "repository.h"
 
 static struct progress *progress;
 
@@ -37,7 +39,7 @@ void prune_packed_objects(int opts)
 	if (opts & PRUNE_PACKED_VERBOSE)
 		progress = start_delayed_progress(_("Removing duplicate objects"), 256);
 
-	for_each_loose_file_in_objdir(get_object_directory(),
+	for_each_loose_file_in_objdir(repo_get_object_directory(the_repository),
 				      prune_object, NULL, prune_subdir, &opts);
 
 	/* Ensure we show 100% before finishing progress */

read-cache.c

@@ -31,6 +31,7 @@
 #include "path.h"
 #include "preload-index.h"
 #include "read-cache.h"
+#include "repository.h"
 #include "resolve-undo.h"
 #include "revision.h"
 #include "strbuf.h"
@@ -3238,10 +3239,11 @@ static int should_delete_shared_index(const char *shared_index_path)
 static int clean_shared_index_files(const char *current_hex)
 {
 	struct dirent *de;
-	DIR *dir = opendir(get_git_dir());
+	DIR *dir = opendir(repo_get_git_dir(the_repository));
 
 	if (!dir)
-		return error_errno(_("unable to open git dir: %s"), get_git_dir());
+		return error_errno(_("unable to open git dir: %s"),
+				   repo_get_git_dir(the_repository));
 
 	while ((de = readdir(dir)) != NULL) {
 		const char *sha1_hex;

ref-filter.c

@@ -13,6 +13,7 @@
 #include "object-name.h"
 #include "object-store-ll.h"
 #include "oid-array.h"
+#include "repo-settings.h"
 #include "repository.h"
 #include "commit.h"
 #include "mailmap.h"
@@ -2180,7 +2181,7 @@ static const char *show_ref(struct refname_atom *atom, const char *refname)
 	if (atom->option == R_SHORT)
 		return refs_shorten_unambiguous_ref(get_main_ref_store(the_repository),
 						    refname,
-						    warn_ambiguous_refs);
+						    repo_settings_get_warn_ambiguous_refs(the_repository));
 	else if (atom->option == R_LSTRIP)
 		return lstrip_ref_components(refname, atom->lstrip);
 	else if (atom->option == R_RSTRIP)

refs.c

@@ -24,7 +24,7 @@
 #include "submodule.h"
 #include "worktree.h"
 #include "strvec.h"
-#include "repository.h"
+#include "repo-settings.h"
 #include "setup.h"
 #include "sigchain.h"
 #include "date.h"
@@ -730,7 +730,7 @@ int expand_ref(struct repository *repo, const char *str, int len,
 		if (r) {
 			if (!refs_found++)
 				*ref = xstrdup(r);
-			if (!warn_ambiguous_refs)
+			if (!repo_settings_get_warn_ambiguous_refs(repo))
 				break;
 		} else if ((flag & REF_ISSYMREF) && strcmp(fullref.buf, "HEAD")) {
 			warning(_("ignoring dangling symref %s"), fullref.buf);
@@ -775,7 +775,7 @@ int repo_dwim_log(struct repository *r, const char *str, int len,
 			if (oid)
 				oidcpy(oid, &hash);
 		}
-		if (!warn_ambiguous_refs)
+		if (!repo_settings_get_warn_ambiguous_refs(r))
 			break;
 	}
 	strbuf_release(&path);
@@ -958,7 +958,8 @@ static char *normalize_reflog_message(const char *msg)
 	return strbuf_detach(&sb, NULL);
 }
 
-int should_autocreate_reflog(const char *refname)
+int should_autocreate_reflog(enum log_refs_config log_all_ref_updates,
+			     const char *refname)
 {
 	switch (log_all_ref_updates) {
 	case LOG_REFS_ALWAYS:

refs.h

@@ -3,6 +3,7 @@
 
 #include "commit.h"
 #include "repository.h"
+#include "repo-settings.h"
 
 struct fsck_options;
 struct object_id;
@@ -111,7 +112,8 @@ int refs_verify_refname_available(struct ref_store *refs,
 
 int refs_ref_exists(struct ref_store *refs, const char *refname);
 
-int should_autocreate_reflog(const char *refname);
+int should_autocreate_reflog(enum log_refs_config log_all_ref_updates,
+			     const char *refname);
 
 int is_branch(const char *refname);
 

refs/files-backend.c

@@ -1,4 +1,7 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "../git-compat-util.h"
+#include "../config.h"
 #include "../copy.h"
 #include "../environment.h"
 #include "../gettext.h"
@@ -6,6 +9,7 @@
 #include "../hex.h"
 #include "../fsck.h"
 #include "../refs.h"
+#include "../repo-settings.h"
 #include "refs-internal.h"
 #include "ref-cache.h"
 #include "packed-backend.h"
@@ -72,6 +76,8 @@ struct files_ref_store {
 	unsigned int store_flags;
 
 	char *gitcommondir;
+	enum log_refs_config log_all_ref_updates;
+	int prefer_symlink_refs;
 
 	struct ref_cache *loose;
 
@@ -104,6 +110,8 @@ static struct ref_store *files_ref_store_init(struct repository *repo,
 	refs->gitcommondir = strbuf_detach(&sb, NULL);
 	refs->packed_ref_store =
 		packed_ref_store_init(repo, refs->gitcommondir, flags);
+	refs->log_all_ref_updates = repo_settings_get_log_all_ref_updates(repo);
+	repo_config_get_bool(repo, "core.prefersymlinkrefs", &refs->prefer_symlink_refs);
 
 	chdir_notify_reparent("files-backend $GIT_DIR", &refs->base.gitdir);
 	chdir_notify_reparent("files-backend $GIT_COMMONDIR",
@@ -1506,6 +1514,7 @@ static int write_ref_to_lockfile(struct files_ref_store *refs,
 static int commit_ref_update(struct files_ref_store *refs,
 			     struct ref_lock *lock,
 			     const struct object_id *oid, const char *logmsg,
+			     int flags,
 			     struct strbuf *err);
 
 /*
@@ -1649,7 +1658,7 @@ static int files_copy_or_rename_ref(struct ref_store *ref_store,
 	oidcpy(&lock->old_oid, &orig_oid);
 
 	if (write_ref_to_lockfile(refs, lock, &orig_oid, 0, &err) ||
-	    commit_ref_update(refs, lock, &orig_oid, logmsg, &err)) {
+	    commit_ref_update(refs, lock, &orig_oid, logmsg, 0, &err)) {
 		error("unable to write current sha1 into %s: %s", newrefname, err.buf);
 		strbuf_release(&err);
 		goto rollback;
@@ -1666,14 +1675,11 @@ static int files_copy_or_rename_ref(struct ref_store *ref_store,
 		goto rollbacklog;
 	}
 
-	flag = log_all_ref_updates;
-	log_all_ref_updates = LOG_REFS_NONE;
 	if (write_ref_to_lockfile(refs, lock, &orig_oid, 0, &err) ||
-	    commit_ref_update(refs, lock, &orig_oid, NULL, &err)) {
+	    commit_ref_update(refs, lock, &orig_oid, NULL, REF_SKIP_CREATE_REFLOG, &err)) {
 		error("unable to write current sha1 into %s: %s", oldrefname, err.buf);
 		strbuf_release(&err);
 	}
-	log_all_ref_updates = flag;
 
  rollbacklog:
 	if (logmoved && rename(sb_newref.buf, sb_oldref.buf))
@@ -1768,13 +1774,17 @@ static int log_ref_setup(struct files_ref_store *refs,
 			 const char *refname, int force_create,
 			 int *logfd, struct strbuf *err)
 {
+	enum log_refs_config log_refs_cfg = refs->log_all_ref_updates;
 	struct strbuf logfile_sb = STRBUF_INIT;
 	char *logfile;
 
+	if (log_refs_cfg == LOG_REFS_UNSET)
+		log_refs_cfg = is_bare_repository() ? LOG_REFS_NONE : LOG_REFS_NORMAL;
+
 	files_reflog_path(refs, &logfile_sb, refname);
 	logfile = strbuf_detach(&logfile_sb, NULL);
 
-	if (force_create || should_autocreate_reflog(refname)) {
+	if (force_create || should_autocreate_reflog(log_refs_cfg, refname)) {
 		if (raceproof_create_file(logfile, open_or_create_logfile, logfd)) {
 			if (errno == ENOENT)
 				strbuf_addf(err, "unable to create directory for '%s': "
@@ -1863,9 +1873,6 @@ static int files_log_ref_write(struct files_ref_store *refs,
 	if (flags & REF_SKIP_CREATE_REFLOG)
 		return 0;
 
-	if (log_all_ref_updates == LOG_REFS_UNSET)
-		log_all_ref_updates = is_bare_repository() ? LOG_REFS_NONE : LOG_REFS_NORMAL;
-
 	result = log_ref_setup(refs, refname,
 			       flags & REF_FORCE_CREATE_REFLOG,
 			       &logfd, err);
@@ -1954,6 +1961,7 @@ static int write_ref_to_lockfile(struct files_ref_store *refs,
 static int commit_ref_update(struct files_ref_store *refs,
 			     struct ref_lock *lock,
 			     const struct object_id *oid, const char *logmsg,
+			     int flags,
 			     struct strbuf *err)
 {
 	files_assert_main_repository(refs, "commit_ref_update");
@@ -1961,7 +1969,7 @@ static int commit_ref_update(struct files_ref_store *refs,
 	clear_loose_ref_cache(refs);
 	if (files_log_ref_write(refs, lock->ref_name,
 				&lock->old_oid, oid,
-				logmsg, 0, err)) {
+				logmsg, flags, err)) {
 		char *old_msg = strbuf_detach(err, NULL);
 		strbuf_addf(err, "cannot update the ref '%s': %s",
 			    lock->ref_name, old_msg);
@@ -1994,7 +2002,7 @@ static int commit_ref_update(struct files_ref_store *refs,
 			struct strbuf log_err = STRBUF_INIT;
 			if (files_log_ref_write(refs, "HEAD",
 						&lock->old_oid, oid,
-						logmsg, 0, &log_err)) {
+						logmsg, flags, &log_err)) {
 				error("%s", log_err.buf);
 				strbuf_release(&log_err);
 			}
@@ -3005,7 +3013,7 @@ static int files_transaction_finish(struct ref_store *ref_store,
 		 * We try creating a symlink, if that succeeds we continue to the
 		 * next update. If not, we try and create a regular symref.
 		 */
-		if (update->new_target && prefer_symlink_refs)
+		if (update->new_target && refs->prefer_symlink_refs)
 			if (!create_ref_symlink(lock, update->new_target))
 				continue;
 

refs/reftable-backend.c

@@ -19,6 +19,7 @@
 #include "../reftable/reftable-record.h"
 #include "../reftable/reftable-error.h"
 #include "../reftable/reftable-iterator.h"
+#include "../repo-settings.h"
 #include "../setup.h"
 #include "../strmap.h"
 #include "parse.h"
@@ -51,6 +52,7 @@ struct reftable_ref_store {
 	struct reftable_write_options write_options;
 
 	unsigned int store_flags;
+	enum log_refs_config log_all_ref_updates;
 	int err;
 };
 
@@ -156,22 +158,23 @@ static struct reftable_stack *stack_for(struct reftable_ref_store *store,
 	}
 }
 
-static int should_write_log(struct ref_store *refs, const char *refname)
+static int should_write_log(struct reftable_ref_store *refs, const char *refname)
 {
-	if (log_all_ref_updates == LOG_REFS_UNSET)
+	enum log_refs_config log_refs_cfg = refs->log_all_ref_updates;
-		log_all_ref_updates = is_bare_repository() ? LOG_REFS_NONE : LOG_REFS_NORMAL;
+	if (log_refs_cfg == LOG_REFS_UNSET)
+		log_refs_cfg = is_bare_repository() ? LOG_REFS_NONE : LOG_REFS_NORMAL;
 
-	switch (log_all_ref_updates) {
+	switch (log_refs_cfg) {
 	case LOG_REFS_NONE:
-		return refs_reflog_exists(refs, refname);
+		return refs_reflog_exists(&refs->base, refname);
 	case LOG_REFS_ALWAYS:
 		return 1;
 	case LOG_REFS_NORMAL:
-		if (should_autocreate_reflog(refname))
+		if (should_autocreate_reflog(log_refs_cfg, refname))
 			return 1;
-		return refs_reflog_exists(refs, refname);
+		return refs_reflog_exists(&refs->base, refname);
 	default:
-		BUG("unhandled core.logAllRefUpdates value %d", log_all_ref_updates);
+		BUG("unhandled core.logAllRefUpdates value %d", log_refs_cfg);
 	}
 }
 
@@ -276,6 +279,7 @@ static struct ref_store *reftable_be_init(struct repository *repo,
 	base_ref_store_init(&refs->base, repo, gitdir, &refs_be_reftable);
 	strmap_init(&refs->worktree_stacks);
 	refs->store_flags = store_flags;
+	refs->log_all_ref_updates = repo_settings_get_log_all_ref_updates(repo);
 
 	refs->write_options.hash_id = repo->hash_algo->format_id;
 	refs->write_options.default_permissions = calc_shared_perm(0666 & ~mask);
@@ -1218,7 +1222,7 @@ static int write_transaction_table(struct reftable_writer *writer, void *cb_data
 		} else if (!(u->flags & REF_SKIP_CREATE_REFLOG) &&
 			   (u->flags & REF_HAVE_NEW) &&
 			   (u->flags & REF_FORCE_CREATE_REFLOG ||
-			    should_write_log(&arg->refs->base, u->refname))) {
+			    should_write_log(arg->refs, u->refname))) {
 			struct reftable_log_record *log;
 			int create_reflog = 1;
 

repo-settings.c

@@ -1,5 +1,6 @@
 #include "git-compat-util.h"
 #include "config.h"
+#include "repo-settings.h"
 #include "repository.h"
 #include "midx.h"
 
@@ -19,6 +20,7 @@ static void repo_cfg_int(struct repository *r, const char *key, int *dest,
 
 void prepare_repo_settings(struct repository *r)
 {
+	const struct repo_settings defaults = REPO_SETTINGS_INIT;
 	int experimental;
 	int value;
 	const char *strval;
@@ -28,13 +30,11 @@ void prepare_repo_settings(struct repository *r)
 	if (!r->gitdir)
 		BUG("Cannot add settings for uninitialized repository");
 
-	if (r->settings.initialized++)
+	if (r->settings.initialized)
 		return;
 
-	/* Defaults */
+	memcpy(&r->settings, &defaults, sizeof(defaults));
-	r->settings.index_version = -1;
+	r->settings.initialized++;
-	r->settings.core_untracked_cache = UNTRACKED_CACHE_KEEP;
-	r->settings.fetch_negotiation_algorithm = FETCH_NEGOTIATION_CONSECUTIVE;
 
 	/* Booleans config or default, cascades to other settings */
 	repo_cfg_bool(r, "feature.manyfiles", &manyfiles, 0);
@@ -124,3 +124,28 @@ void prepare_repo_settings(struct repository *r)
 	 */
 	r->settings.command_requires_full_index = 1;
 }
+
+enum log_refs_config repo_settings_get_log_all_ref_updates(struct repository *repo)
+{
+	const char *value;
+
+	if (!repo_config_get_string_tmp(repo, "core.logallrefupdates", &value)) {
+		if (value && !strcasecmp(value, "always"))
+			return LOG_REFS_ALWAYS;
+		else if (git_config_bool("core.logallrefupdates", value))
+			return LOG_REFS_NORMAL;
+		else
+			return LOG_REFS_NONE;
+	}
+
+	return LOG_REFS_UNSET;
+}
+
+int repo_settings_get_warn_ambiguous_refs(struct repository *repo)
+{
+	prepare_repo_settings(repo);
+	if (repo->settings.warn_ambiguous_refs < 0)
+		repo_cfg_bool(repo, "core.warnambiguousrefs",
+			      &repo->settings.warn_ambiguous_refs, 1);
+	return repo->settings.warn_ambiguous_refs;
+}

repo-settings.h

@@ -0,0 +1,75 @@
+#ifndef REPO_SETTINGS_H
+#define REPO_SETTINGS_H
+
+struct fsmonitor_settings;
+struct repository;
+
+enum untracked_cache_setting {
+	UNTRACKED_CACHE_KEEP,
+	UNTRACKED_CACHE_REMOVE,
+	UNTRACKED_CACHE_WRITE,
+};
+
+enum fetch_negotiation_setting {
+	FETCH_NEGOTIATION_CONSECUTIVE,
+	FETCH_NEGOTIATION_SKIPPING,
+	FETCH_NEGOTIATION_NOOP,
+};
+
+enum log_refs_config {
+	LOG_REFS_UNSET = -1,
+	LOG_REFS_NONE = 0,
+	LOG_REFS_NORMAL,
+	LOG_REFS_ALWAYS
+};
+
+struct repo_settings {
+	int initialized;
+
+	int core_commit_graph;
+	int commit_graph_generation_version;
+	int commit_graph_changed_paths_version;
+	int gc_write_commit_graph;
+	int fetch_write_commit_graph;
+	int command_requires_full_index;
+	int sparse_index;
+	int pack_read_reverse_index;
+	int pack_use_bitmap_boundary_traversal;
+	int pack_use_multi_pack_reuse;
+
+	/*
+	 * Does this repository have core.useReplaceRefs=true (on by
+	 * default)? This provides a repository-scoped version of this
+	 * config, though it could be disabled process-wide via some Git
+	 * builtins or the --no-replace-objects option. See
+	 * replace_refs_enabled() for more details.
+	 */
+	int read_replace_refs;
+
+	struct fsmonitor_settings *fsmonitor; /* lazily loaded */
+
+	int index_version;
+	int index_skip_hash;
+	enum untracked_cache_setting core_untracked_cache;
+
+	int pack_use_sparse;
+	enum fetch_negotiation_setting fetch_negotiation_algorithm;
+
+	int core_multi_pack_index;
+	int warn_ambiguous_refs; /* lazily loaded via accessor */
+};
+#define REPO_SETTINGS_INIT { \
+	.index_version = -1, \
+	.core_untracked_cache = UNTRACKED_CACHE_KEEP, \
+	.fetch_negotiation_algorithm = FETCH_NEGOTIATION_CONSECUTIVE, \
+	.warn_ambiguous_refs = -1, \
+}
+
+void prepare_repo_settings(struct repository *r);
+
+/* Read the value for "core.logAllRefUpdates". */
+enum log_refs_config repo_settings_get_log_all_ref_updates(struct repository *repo);
+/* Read the value for "core.warnAmbiguousRefs". */
+int repo_settings_get_warn_ambiguous_refs(struct repository *repo);
+
+#endif /* REPO_SETTINGS_H */

repository.c

@@ -91,6 +91,46 @@ static void expand_base_dir(char **out, const char *in,
 		*out = xstrfmt("%s/%s", base_dir, def_in);
 }
 
+const char *repo_get_git_dir(struct repository *repo)
+{
+	if (!repo->gitdir)
+		BUG("repository hasn't been set up");
+	return repo->gitdir;
+}
+
+const char *repo_get_common_dir(struct repository *repo)
+{
+	if (!repo->commondir)
+		BUG("repository hasn't been set up");
+	return repo->commondir;
+}
+
+const char *repo_get_object_directory(struct repository *repo)
+{
+	if (!repo->objects->odb)
+		BUG("repository hasn't been set up");
+	return repo->objects->odb->path;
+}
+
+const char *repo_get_index_file(struct repository *repo)
+{
+	if (!repo->index_file)
+		BUG("repository hasn't been set up");
+	return repo->index_file;
+}
+
+const char *repo_get_graft_file(struct repository *repo)
+{
+	if (!repo->graft_file)
+		BUG("repository hasn't been set up");
+	return repo->graft_file;
+}
+
+const char *repo_get_work_tree(struct repository *repo)
+{
+	return repo->worktree;
+}
+
 static void repo_set_commondir(struct repository *repo,
 			       const char *commondir)
 {

repository.h

@@ -2,9 +2,9 @@
 #define REPOSITORY_H
 
 #include "strmap.h"
+#include "repo-settings.h"
 
 struct config_set;
-struct fsmonitor_settings;
 struct git_hash_algo;
 struct index_state;
 struct lock_file;
@@ -14,59 +14,12 @@ struct submodule_cache;
 struct promisor_remote_config;
 struct remote_state;
 
-enum untracked_cache_setting {
-	UNTRACKED_CACHE_KEEP,
-	UNTRACKED_CACHE_REMOVE,
-	UNTRACKED_CACHE_WRITE,
-};
-
-enum fetch_negotiation_setting {
-	FETCH_NEGOTIATION_CONSECUTIVE,
-	FETCH_NEGOTIATION_SKIPPING,
-	FETCH_NEGOTIATION_NOOP,
-};
-
 enum ref_storage_format {
 	REF_STORAGE_FORMAT_UNKNOWN,
 	REF_STORAGE_FORMAT_FILES,
 	REF_STORAGE_FORMAT_REFTABLE,
 };
 
-struct repo_settings {
-	int initialized;
-
-	int core_commit_graph;
-	int commit_graph_generation_version;
-	int commit_graph_changed_paths_version;
-	int gc_write_commit_graph;
-	int fetch_write_commit_graph;
-	int command_requires_full_index;
-	int sparse_index;
-	int pack_read_reverse_index;
-	int pack_use_bitmap_boundary_traversal;
-	int pack_use_multi_pack_reuse;
-
-	/*
-	 * Does this repository have core.useReplaceRefs=true (on by
-	 * default)? This provides a repository-scoped version of this
-	 * config, though it could be disabled process-wide via some Git
-	 * builtins or the --no-replace-objects option. See
-	 * replace_refs_enabled() for more details.
-	 */
-	int read_replace_refs;
-
-	struct fsmonitor_settings *fsmonitor; /* lazily loaded */
-
-	int index_version;
-	int index_skip_hash;
-	enum untracked_cache_setting core_untracked_cache;
-
-	int pack_use_sparse;
-	enum fetch_negotiation_setting fetch_negotiation_algorithm;
-
-	int core_multi_pack_index;
-};
-
 struct repo_path_cache {
 	char *squash_msg;
 	char *merge_msg;
@@ -206,6 +159,13 @@ struct repository {
 extern struct repository *the_repository;
 #endif
 
+const char *repo_get_git_dir(struct repository *repo);
+const char *repo_get_common_dir(struct repository *repo);
+const char *repo_get_object_directory(struct repository *repo);
+const char *repo_get_index_file(struct repository *repo);
+const char *repo_get_graft_file(struct repository *repo);
+const char *repo_get_work_tree(struct repository *repo);
+
 /*
  * Define a custom repository layout. Any field can be NULL, which
  * will default back to the path according to the default layout.
@@ -266,8 +226,6 @@ int repo_read_index_unmerged(struct repository *);
  */
 void repo_update_index_if_able(struct repository *, struct lock_file *);
 
-void prepare_repo_settings(struct repository *r);
-
 /*
  * Return 1 if upgrade repository format to target_version succeeded,
  * 0 if no upgrade is necessary, and -1 when upgrade is not possible.

server-info.c

@@ -2,7 +2,6 @@
 
 #include "git-compat-util.h"
 #include "dir.h"
-#include "environment.h"
 #include "hex.h"
 #include "repository.h"
 #include "refs.h"
@@ -342,7 +341,8 @@ static int write_pack_info_file(struct update_info_ctx *uic)
 
 static int update_info_packs(int force)
 {
-	char *infofile = mkpathdup("%s/info/packs", get_object_directory());
+	char *infofile = mkpathdup("%s/info/packs",
+				   repo_get_object_directory(the_repository));
 	int ret;
 
 	init_pack_info(infofile, force);

setup.c

@@ -7,16 +7,22 @@
 #include "exec-cmd.h"
 #include "gettext.h"
 #include "hex.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "refs.h"
+#include "replace-object.h"
 #include "repository.h"
 #include "config.h"
 #include "dir.h"
 #include "setup.h"
+#include "shallow.h"
 #include "string-list.h"
+#include "strvec.h"
 #include "chdir-notify.h"
 #include "path.h"
 #include "quote.h"
+#include "tmp-objdir.h"
+#include "trace.h"
 #include "trace2.h"
 #include "worktree.h"
 #include "exec-cmd.h"
@@ -51,7 +57,7 @@ static int abspath_part_inside_repo(char *path)
 	size_t wtlen;
 	char *path0;
 	int off;
-	const char *work_tree = precompose_string_if_needed(get_git_work_tree());
+	const char *work_tree = precompose_string_if_needed(repo_get_work_tree(the_repository));
 	struct strbuf realpath = STRBUF_INIT;
 
 	if (!work_tree)
@@ -147,9 +153,9 @@ char *prefix_path(const char *prefix, int len, const char *path)
 {
 	char *r = prefix_path_gently(prefix, len, NULL, path);
 	if (!r) {
-		const char *hint_path = get_git_work_tree();
+		const char *hint_path = repo_get_work_tree(the_repository);
 		if (!hint_path)
-			hint_path = get_git_dir();
+			hint_path = repo_get_git_dir(the_repository);
 		die(_("'%s' is outside repository at '%s'"), path,
 		    absolute_path(hint_path));
 	}
@@ -468,14 +474,14 @@ int is_nonbare_repository_dir(struct strbuf *path)
 int is_inside_git_dir(void)
 {
 	if (inside_git_dir < 0)
-		inside_git_dir = is_inside_dir(get_git_dir());
+		inside_git_dir = is_inside_dir(repo_get_git_dir(the_repository));
 	return inside_git_dir;
 }
 
 int is_inside_work_tree(void)
 {
 	if (inside_work_tree < 0)
-		inside_work_tree = is_inside_dir(get_git_work_tree());
+		inside_work_tree = is_inside_dir(repo_get_work_tree(the_repository));
 	return inside_work_tree;
 }
 
@@ -490,7 +496,7 @@ void setup_work_tree(void)
 	if (work_tree_config_is_bogus)
 		die(_("unable to set up work tree using invalid config"));
 
-	work_tree = get_git_work_tree();
+	work_tree = repo_get_work_tree(the_repository);
 	if (!work_tree || chdir_notify(work_tree))
 		die(_("this operation must be run in a work tree"));
 
@@ -547,7 +553,7 @@ static void setup_original_cwd(void)
 	 * Get our worktree; we only protect the current working directory
 	 * if it's in the worktree.
 	 */
-	worktree = get_git_work_tree();
+	worktree = repo_get_work_tree(the_repository);
 	if (!worktree)
 		goto no_prevention_needed;
 
@@ -1062,9 +1068,9 @@ static const char *setup_explicit_git_dir(const char *gitdirenv,
 		set_git_work_tree(".");
 
 	/* set_git_work_tree() must have been called by now */
-	worktree = get_git_work_tree();
+	worktree = repo_get_work_tree(the_repository);
 
-	/* both get_git_work_tree() and cwd are already normalized */
+	/* both repo_get_work_tree() and cwd are already normalized */
 	if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */
 		set_git_dir(gitdirenv, 0);
 		free(gitfile);
@@ -1613,6 +1619,106 @@ enum discovery_result discover_git_directory_reason(struct strbuf *commondir,
 	return result;
 }
 
+void setup_git_env(const char *git_dir)
+{
+	char *git_replace_ref_base;
+	const char *shallow_file;
+	const char *replace_ref_base;
+	struct set_gitdir_args args = { NULL };
+	struct strvec to_free = STRVEC_INIT;
+
+	args.commondir = getenv_safe(&to_free, GIT_COMMON_DIR_ENVIRONMENT);
+	args.object_dir = getenv_safe(&to_free, DB_ENVIRONMENT);
+	args.graft_file = getenv_safe(&to_free, GRAFT_ENVIRONMENT);
+	args.index_file = getenv_safe(&to_free, INDEX_ENVIRONMENT);
+	args.alternate_db = getenv_safe(&to_free, ALTERNATE_DB_ENVIRONMENT);
+	if (getenv(GIT_QUARANTINE_ENVIRONMENT)) {
+		args.disable_ref_updates = 1;
+	}
+
+	repo_set_gitdir(the_repository, git_dir, &args);
+	strvec_clear(&to_free);
+
+	if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
+		disable_replace_refs();
+	replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
+	git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
+							  : "refs/replace/");
+	update_ref_namespace(NAMESPACE_REPLACE, git_replace_ref_base);
+
+	shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
+	if (shallow_file)
+		set_alternate_shallow_file(the_repository, shallow_file, 0);
+
+	if (git_env_bool(NO_LAZY_FETCH_ENVIRONMENT, 0))
+		fetch_if_missing = 0;
+}
+
+static void set_git_dir_1(const char *path)
+{
+	xsetenv(GIT_DIR_ENVIRONMENT, path, 1);
+	setup_git_env(path);
+}
+
+static void update_relative_gitdir(const char *name UNUSED,
+				   const char *old_cwd,
+				   const char *new_cwd,
+				   void *data UNUSED)
+{
+	char *path = reparent_relative_path(old_cwd, new_cwd,
+					    repo_get_git_dir(the_repository));
+	struct tmp_objdir *tmp_objdir = tmp_objdir_unapply_primary_odb();
+
+	trace_printf_key(&trace_setup_key,
+			 "setup: move $GIT_DIR to '%s'",
+			 path);
+	set_git_dir_1(path);
+	if (tmp_objdir)
+		tmp_objdir_reapply_primary_odb(tmp_objdir, old_cwd, new_cwd);
+	free(path);
+}
+
+void set_git_dir(const char *path, int make_realpath)
+{
+	struct strbuf realpath = STRBUF_INIT;
+
+	if (make_realpath) {
+		strbuf_realpath(&realpath, path, 1);
+		path = realpath.buf;
+	}
+
+	set_git_dir_1(path);
+	if (!is_absolute_path(path))
+		chdir_notify_register(NULL, update_relative_gitdir, NULL);
+
+	strbuf_release(&realpath);
+}
+
+static int git_work_tree_initialized;
+
+/*
+ * Note.  This works only before you used a work tree.  This was added
+ * primarily to support git-clone to work in a new repository it just
+ * created, and is not meant to flip between different work trees.
+ */
+void set_git_work_tree(const char *new_work_tree)
+{
+	if (git_work_tree_initialized) {
+		struct strbuf realpath = STRBUF_INIT;
+
+		strbuf_realpath(&realpath, new_work_tree, 1);
+		new_work_tree = realpath.buf;
+		if (strcmp(new_work_tree, the_repository->worktree))
+			die("internal error: work tree has already been set\n"
+			    "Current worktree: %s\nNew worktree: %s",
+			    the_repository->worktree, new_work_tree);
+		strbuf_release(&realpath);
+		return;
+	}
+	git_work_tree_initialized = 1;
+	repo_set_worktree(the_repository, new_work_tree);
+}
+
 const char *setup_git_directory_gently(int *nongit_ok)
 {
 	static struct strbuf cwd = STRBUF_INIT;
@@ -1836,7 +1942,7 @@ void check_repository_format(struct repository_format *fmt)
 	struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT;
 	if (!fmt)
 		fmt = &repo_fmt;
-	check_repository_format_gently(get_git_dir(), fmt, NULL);
+	check_repository_format_gently(repo_get_git_dir(the_repository), fmt, NULL);
 	startup_info->have_repository = 1;
 	repo_set_hash_algo(the_repository, fmt->hash_algo);
 	repo_set_compat_hash_algo(the_repository, fmt->compat_hash_algo);
@@ -2068,7 +2174,7 @@ static void copy_templates(const char *option_template)
 		goto close_free_return;
 	}
 
-	strbuf_addstr(&path, get_git_common_dir());
+	strbuf_addstr(&path, repo_get_common_dir(the_repository));
 	strbuf_complete(&path, '/');
 	copy_templates_1(&path, &template_path, dir);
 close_free_return:
@@ -2192,7 +2298,7 @@ static int create_default_files(const char *template_path,
 	char *path;
 	int reinit;
 	int filemode;
-	const char *work_tree = get_git_work_tree();
+	const char *work_tree = repo_get_work_tree(the_repository);
 
 	/*
 	 * First copy the templates -- we might have the default
@@ -2224,7 +2330,7 @@ static int create_default_files(const char *template_path,
 	 * shared-repository settings, we would need to fix them up.
 	 */
 	if (get_shared_repository()) {
-		adjust_shared_perm(get_git_dir());
+		adjust_shared_perm(repo_get_git_dir(the_repository));
 	}
 
 	initialize_repository_version(fmt->hash_algo, fmt->ref_storage_format, 0);
@@ -2248,7 +2354,7 @@ static int create_default_files(const char *template_path,
 	else {
 		git_config_set("core.bare", "false");
 		/* allow template config file to override the default */
-		if (log_all_ref_updates == LOG_REFS_UNSET)
+		if (repo_settings_get_log_all_ref_updates(the_repository) == LOG_REFS_UNSET)
 			git_config_set("core.logallrefupdates", "true");
 		if (needs_work_tree_config(original_git_dir, work_tree))
 			git_config_set("core.worktree", work_tree);
@@ -2282,7 +2388,7 @@ static void create_object_directory(void)
 	struct strbuf path = STRBUF_INIT;
 	size_t baselen;
 
-	strbuf_addstr(&path, get_object_directory());
+	strbuf_addstr(&path, repo_get_object_directory(the_repository));
 	baselen = path.len;
 
 	safe_create_dir(path.buf, 1);
@@ -2434,12 +2540,12 @@ int init_db(const char *git_dir, const char *real_git_dir,
 			die(_("%s already exists"), real_git_dir);
 
 		set_git_dir(real_git_dir, 1);
-		git_dir = get_git_dir();
+		git_dir = repo_get_git_dir(the_repository);
 		separate_git_dir(git_dir, original_git_dir);
 	}
 	else {
 		set_git_dir(git_dir, 1);
-		git_dir = get_git_dir();
+		git_dir = repo_get_git_dir(the_repository);
 	}
 	startup_info->have_repository = 1;
 

setup.h

@@ -94,6 +94,9 @@ static inline int discover_git_directory(struct strbuf *commondir,
 	return 0;
 }
 
+void set_git_dir(const char *path, int make_realpath);
+void set_git_work_tree(const char *tree);
+
 const char *setup_git_directory_gently(int *);
 const char *setup_git_directory(void);
 char *prefix_path(const char *prefix, int len, const char *path);
@@ -176,7 +179,7 @@ int verify_repository_format(const struct repository_format *format,
 			     struct strbuf *err);
 
 /*
- * Check the repository format version in the path found in get_git_dir(),
+ * Check the repository format version in the path found in repo_get_git_dir(the_repository),
  * and die if it is a version we don't understand. Generally one would
  * set_git_dir() before calling this, and use it only for "are we in a valid
  * repo?".

sparse-index.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "environment.h"
 #include "gettext.h"

statinfo.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "environment.h"
 #include "statinfo.h"

submodule.c

@@ -2464,7 +2464,7 @@ void absorb_git_dir_into_superproject(const char *path,
 	} else {
 		/* Is it already absorbed into the superprojects git dir? */
 		char *real_sub_git_dir = real_pathdup(sub_git_dir, 1);
-		char *real_common_git_dir = real_pathdup(get_git_common_dir(), 1);
+		char *real_common_git_dir = real_pathdup(repo_get_common_dir(the_repository), 1);
 
 		if (!starts_with(real_sub_git_dir, real_common_git_dir))
 			relocate_single_git_dir_into_superproject(path, super_prefix);

t/helper/test-config.c

@@ -96,7 +96,8 @@ int cmd__config(int argc, const char **argv)
 	struct config_set cs;
 
 	if (argc == 3 && !strcmp(argv[1], "read_early_config")) {
-		read_early_config(early_config_cb, (void *)argv[2]);
+		read_early_config(the_repository, early_config_cb,
+				  (void *)argv[2]);
 		return 0;
 	}
 

t/helper/test-path-utils.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "test-tool.h"
 #include "abspath.h"
 #include "environment.h"

tmp-objdir.c

@@ -13,6 +13,7 @@
 #include "strvec.h"
 #include "quote.h"
 #include "object-store-ll.h"
+#include "repository.h"
 
 struct tmp_objdir {
 	struct strbuf path;
@@ -132,7 +133,8 @@ struct tmp_objdir *tmp_objdir_create(const char *prefix)
 	 * can recognize any stale objdirs left behind by a crash and delete
 	 * them.
 	 */
-	strbuf_addf(&t->path, "%s/tmp_objdir-%s-XXXXXX", get_object_directory(), prefix);
+	strbuf_addf(&t->path, "%s/tmp_objdir-%s-XXXXXX",
+		    repo_get_object_directory(the_repository), prefix);
 
 	if (!mkdtemp(t->path.buf)) {
 		/* free, not destroy, as we never touched the filesystem */
@@ -152,7 +154,7 @@ struct tmp_objdir *tmp_objdir_create(const char *prefix)
 	}
 
 	env_append(&t->env, ALTERNATE_DB_ENVIRONMENT,
-		   absolute_path(get_object_directory()));
+		   absolute_path(repo_get_object_directory(the_repository)));
 	env_replace(&t->env, DB_ENVIRONMENT, absolute_path(t->path.buf));
 	env_replace(&t->env, GIT_QUARANTINE_ENVIRONMENT,
 		    absolute_path(t->path.buf));
@@ -267,7 +269,7 @@ int tmp_objdir_migrate(struct tmp_objdir *t)
 	}
 
 	strbuf_addbuf(&src, &t->path);
-	strbuf_addstr(&dst, get_object_directory());
+	strbuf_addstr(&dst, repo_get_object_directory(the_repository));
 
 	ret = migrate_paths(&src, &dst);
 

trace.c

@@ -21,9 +21,11 @@
  *  along with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "abspath.h"
-#include "environment.h"
+#include "repository.h"
 #include "quote.h"
 #include "setup.h"
 #include "trace.h"
@@ -305,14 +307,14 @@ void trace_repo_setup(void)
 
 	cwd = xgetcwd();
 
-	if (!(git_work_tree = get_git_work_tree()))
+	if (!(git_work_tree = repo_get_work_tree(the_repository)))
 		git_work_tree = "(null)";
 
 	if (!startup_info->prefix)
 		prefix = "(null)";
 
-	trace_printf_key(&trace_setup_key, "setup: git_dir: %s\n", quote_crnl(get_git_dir()));
+	trace_printf_key(&trace_setup_key, "setup: git_dir: %s\n", quote_crnl(repo_get_git_dir(the_repository)));
-	trace_printf_key(&trace_setup_key, "setup: git_common_dir: %s\n", quote_crnl(get_git_common_dir()));
+	trace_printf_key(&trace_setup_key, "setup: git_common_dir: %s\n", quote_crnl(repo_get_common_dir(the_repository)));
 	trace_printf_key(&trace_setup_key, "setup: worktree: %s\n", quote_crnl(git_work_tree));
 	trace_printf_key(&trace_setup_key, "setup: cwd: %s\n", quote_crnl(cwd));
 	trace_printf_key(&trace_setup_key, "setup: prefix: %s\n", quote_crnl(prefix));

trace2/tr2_cfg.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "config.h"
 #include "strbuf.h"
@@ -124,7 +126,7 @@ void tr2_cfg_list_config_fl(const char *file, int line)
 	struct tr2_cfg_data data = { file, line };
 
 	if (tr2_cfg_load_patterns() > 0)
-		read_early_config(tr2_cfg_cb, &data);
+		read_early_config(the_repository, tr2_cfg_cb, &data);
 }
 
 void tr2_list_env_vars_fl(const char *file, int line)

transport-helper.c

@@ -143,7 +143,7 @@ static struct child_process *get_helper(struct transport *transport)
 
 	if (have_git_dir())
 		strvec_pushf(&helper->env, "%s=%s",
-			     GIT_DIR_ENVIRONMENT, get_git_dir());
+			     GIT_DIR_ENVIRONMENT, repo_get_git_dir(the_repository));
 
 	helper->trace2_child_class = helper->args.v[0]; /* "remote-<name>" */
 

tree-diff.c

@@ -1,6 +1,9 @@
 /*
  * Helper functions for tree diff generation
  */
+
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "diff.h"
 #include "diffcore.h"

userdiff.c

@@ -1,3 +1,5 @@
+#define USE_THE_REPOSITORY_VARIABLE
+
 #include "git-compat-util.h"
 #include "config.h"
 #include "userdiff.h"

worktree.c

@@ -57,7 +57,7 @@ static void add_head_info(struct worktree *wt)
 
 static int is_current_worktree(struct worktree *wt)
 {
-	char *git_dir = absolute_pathdup(get_git_dir());
+	char *git_dir = absolute_pathdup(repo_get_git_dir(the_repository));
 	const char *wt_git_dir = get_worktree_git_dir(wt);
 	int is_current = !fspathcmp(git_dir, absolute_path(wt_git_dir));
 	free(git_dir);
@@ -72,7 +72,7 @@ static struct worktree *get_main_worktree(int skip_reading_head)
 	struct worktree *worktree = NULL;
 	struct strbuf worktree_path = STRBUF_INIT;
 
-	strbuf_add_real_path(&worktree_path, get_git_common_dir());
+	strbuf_add_real_path(&worktree_path, repo_get_common_dir(the_repository));
 	strbuf_strip_suffix(&worktree_path, "/.git");
 
 	CALLOC_ARRAY(worktree, 1);
@@ -143,7 +143,7 @@ static struct worktree **get_worktrees_internal(int skip_reading_head)
 
 	list[counter++] = get_main_worktree(skip_reading_head);
 
-	strbuf_addf(&path, "%s/worktrees", get_git_common_dir());
+	strbuf_addf(&path, "%s/worktrees", repo_get_common_dir(the_repository));
 	dir = opendir(path.buf);
 	strbuf_release(&path);
 	if (dir) {
@@ -171,9 +171,9 @@ struct worktree **get_worktrees(void)
 const char *get_worktree_git_dir(const struct worktree *wt)
 {
 	if (!wt)
-		return get_git_dir();
+		return repo_get_git_dir(the_repository);
 	else if (!wt->id)
-		return get_git_common_dir();
+		return repo_get_common_dir(the_repository);
 	else
 		return git_common_path("worktrees/%s", wt->id);
 }
@@ -626,7 +626,7 @@ static int is_main_worktree_path(const char *path)
 
 	strbuf_add_real_path(&target, path);
 	strbuf_strip_suffix(&target, "/.git");
-	strbuf_add_real_path(&maindir, get_git_common_dir());
+	strbuf_add_real_path(&maindir, repo_get_common_dir(the_repository));
 	strbuf_strip_suffix(&maindir, "/.git");
 	cmp = fspathcmp(maindir.buf, target.buf);
 

wt-status.c

@@ -16,6 +16,7 @@
 #include "revision.h"
 #include "diffcore.h"
 #include "quote.h"
+#include "repository.h"
 #include "run-command.h"
 #include "strvec.h"
 #include "remote.h"
@@ -152,7 +153,7 @@ void wt_status_prepare(struct repository *r, struct wt_status *s)
 					"HEAD", 0, NULL, NULL);
 	s->reference = "HEAD";
 	s->fp = stdout;
-	s->index_file = get_index_file();
+	s->index_file = repo_get_index_file(the_repository);
 	s->change.strdup_strings = 1;
 	s->untracked.strdup_strings = 1;
 	s->ignored.strdup_strings = 1;