Merge branch 'sb/object-store-lookup'

lookup_commit_reference() and friends have been updated to find
in-core object for a specific in-core repository instance.

* sb/object-store-lookup: (32 commits)
  commit.c: allow lookup_commit_reference to handle arbitrary repositories
  commit.c: allow lookup_commit_reference_gently to handle arbitrary repositories
  tag.c: allow deref_tag to handle arbitrary repositories
  object.c: allow parse_object to handle arbitrary repositories
  object.c: allow parse_object_buffer to handle arbitrary repositories
  commit.c: allow get_cached_commit_buffer to handle arbitrary repositories
  commit.c: allow set_commit_buffer to handle arbitrary repositories
  commit.c: migrate the commit buffer to the parsed object store
  commit-slabs: remove realloc counter outside of slab struct
  commit.c: allow parse_commit_buffer to handle arbitrary repositories
  tag: allow parse_tag_buffer to handle arbitrary repositories
  tag: allow lookup_tag to handle arbitrary repositories
  commit: allow lookup_commit to handle arbitrary repositories
  tree: allow lookup_tree to handle arbitrary repositories
  blob: allow lookup_blob to handle arbitrary repositories
  object: allow lookup_object to handle arbitrary repositories
  object: allow object_as_type to handle arbitrary repositories
  tag: add repository argument to deref_tag
  tag: add repository argument to parse_tag_buffer
  tag: add repository argument to lookup_tag
  ...

archive.c

@@ -380,7 +380,7 @@ static void parse_treeish_arg(const char **argv,
 	if (get_oid(name, &oid))
 		die("Not a valid object name");
 
-	commit = lookup_commit_reference_gently(&oid, 1);
+	commit = lookup_commit_reference_gently(the_repository, &oid, 1);
 	if (commit) {
 		commit_sha1 = commit->object.oid.hash;
 		archive_time = commit->date;

bisect.c

@@ -724,7 +724,7 @@ static int bisect_checkout(const struct object_id *bisect_rev, int no_checkout)
 
 static struct commit *get_commit_reference(const struct object_id *oid)
 {
-	struct commit *r = lookup_commit_reference(oid);
+	struct commit *r = lookup_commit_reference(the_repository, oid);
 	if (!r)
 		die(_("Not a valid commit name %s"), oid_to_hex(oid));
 	return r;

blame.c

@@ -119,7 +119,7 @@ static struct commit_list **append_parent(struct commit_list **tail, const struc
 {
 	struct commit *parent;
 
-	parent = lookup_commit_reference(oid);
+	parent = lookup_commit_reference(the_repository, oid);
 	if (!parent)
 		die("no such commit %s", oid_to_hex(oid));
 	return &commit_list_insert(parent, tail)->next;
@@ -158,7 +158,7 @@ static void set_commit_buffer_from_strbuf(struct commit *c, struct strbuf *sb)
 {
 	size_t len;
 	void *buf = strbuf_detach(sb, &len);
-	set_commit_buffer(c, buf, len);
+	set_commit_buffer(the_repository, c, buf, len);
 }
 
 /*
@@ -1674,7 +1674,7 @@ static struct commit *find_single_final(struct rev_info *revs,
 		struct object *obj = revs->pending.objects[i].item;
 		if (obj->flags & UNINTERESTING)
 			continue;
-		obj = deref_tag(obj, NULL, 0);
+		obj = deref_tag(the_repository, obj, NULL, 0);
 		if (obj->type != OBJ_COMMIT)
 			die("Non commit %s?", revs->pending.objects[i].name);
 		if (found)
@@ -1705,14 +1705,15 @@ static struct commit *dwim_reverse_initial(struct rev_info *revs,
 
 	/* Is that sole rev a committish? */
 	obj = revs->pending.objects[0].item;
-	obj = deref_tag(obj, NULL, 0);
+	obj = deref_tag(the_repository, obj, NULL, 0);
 	if (obj->type != OBJ_COMMIT)
 		return NULL;
 
 	/* Do we have HEAD? */
 	if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, &head_oid, NULL))
 		return NULL;
-	head_commit = lookup_commit_reference_gently(&head_oid, 1);
+	head_commit = lookup_commit_reference_gently(the_repository,
+						     &head_oid, 1);
 	if (!head_commit)
 		return NULL;
 
@@ -1740,7 +1741,7 @@ static struct commit *find_single_initial(struct rev_info *revs,
 		struct object *obj = revs->pending.objects[i].item;
 		if (!(obj->flags & UNINTERESTING))
 			continue;
-		obj = deref_tag(obj, NULL, 0);
+		obj = deref_tag(the_repository, obj, NULL, 0);
 		if (obj->type != OBJ_COMMIT)
 			die("Non commit %s?", revs->pending.objects[i].name);
 		if (found)

blob.c

@@ -5,13 +5,13 @@
 
 const char *blob_type = "blob";
 
-struct blob *lookup_blob(const struct object_id *oid)
+struct blob *lookup_blob(struct repository *r, const struct object_id *oid)
 {
-	struct object *obj = lookup_object(oid->hash);
+	struct object *obj = lookup_object(r, oid->hash);
 	if (!obj)
-		return create_object(the_repository, oid->hash,
-				     alloc_blob_node(the_repository));
-	return object_as_type(obj, OBJ_BLOB, 0);
+		return create_object(r, oid->hash,
+				     alloc_blob_node(r));
+	return object_as_type(r, obj, OBJ_BLOB, 0);
 }
 
 int parse_blob_buffer(struct blob *item, void *buffer, unsigned long size)

blob.h

@@ -9,7 +9,7 @@ struct blob {
 	struct object object;
 };
 
-struct blob *lookup_blob(const struct object_id *oid);
+struct blob *lookup_blob(struct repository *r, const struct object_id *oid);
 
 int parse_blob_buffer(struct blob *item, void *buffer, unsigned long size);
 

branch.c

@@ -302,7 +302,7 @@ void create_branch(const char *name, const char *start_name,
 		break;
 	}
 
-	if ((commit = lookup_commit_reference(&oid)) == NULL)
+	if ((commit = lookup_commit_reference(the_repository, &oid)) == NULL)
 		die(_("Not a valid branch point: '%s'."), start_name);
 	oidcpy(&oid, &commit->object.oid);
 

builtin/am.c

@@ -32,6 +32,7 @@
 #include "apply.h"
 #include "string-list.h"
 #include "packfile.h"
+#include "repository.h"
 
 /**
  * Returns 1 if the file is empty or does not exist, 0 otherwise.
@@ -1400,9 +1401,10 @@ static void write_index_patch(const struct am_state *state)
 	FILE *fp;
 
 	if (!get_oid_tree("HEAD", &head))
-		tree = lookup_tree(&head);
+		tree = lookup_tree(the_repository, &head);
 	else
-		tree = lookup_tree(the_hash_algo->empty_tree);
+		tree = lookup_tree(the_repository,
+				   the_repository->hash_algo->empty_tree);
 
 	fp = xfopen(am_path(state, "patch"), "w");
 	init_revisions(&rev_info, NULL);
@@ -1631,7 +1633,8 @@ static void do_commit(const struct am_state *state)
 
 	if (!get_oid_commit("HEAD", &parent)) {
 		old_oid = &parent;
-		commit_list_insert(lookup_commit(&parent), &parents);
+		commit_list_insert(lookup_commit(the_repository, &parent),
+				   &parents);
 	} else {
 		old_oid = NULL;
 		say(state, stderr, _("applying to an empty history"));

builtin/branch.c

@@ -122,7 +122,8 @@ static int branch_merged(int kind, const char *name,
 		    (reference_name = reference_name_to_free =
 		     resolve_refdup(upstream, RESOLVE_REF_READING,
 				    &oid, NULL)) != NULL)
-			reference_rev = lookup_commit_reference(&oid);
+			reference_rev = lookup_commit_reference(the_repository,
+								&oid);
 	}
 	if (!reference_rev)
 		reference_rev = head_rev;
@@ -155,7 +156,7 @@ static int check_branch_commit(const char *branchname, const char *refname,
 			       const struct object_id *oid, struct commit *head_rev,
 			       int kinds, int force)
 {
-	struct commit *rev = lookup_commit_reference(oid);
+	struct commit *rev = lookup_commit_reference(the_repository, oid);
 	if (!rev) {
 		error(_("Couldn't look up commit object for '%s'"), refname);
 		return -1;
@@ -209,7 +210,7 @@ static int delete_branches(int argc, const char **argv, int force, int kinds,
 	}
 
 	if (!force) {
-		head_rev = lookup_commit_reference(&head_oid);
+		head_rev = lookup_commit_reference(the_repository, &head_oid);
 		if (!head_rev)
 			die(_("Couldn't look up commit object for HEAD"));
 	}

builtin/checkout.c

@@ -380,7 +380,7 @@ static int checkout_paths(const struct checkout_opts *opts,
 		die(_("unable to write new index file"));
 
 	read_ref_full("HEAD", 0, &rev, NULL);
-	head = lookup_commit_reference_gently(&rev, 1);
+	head = lookup_commit_reference_gently(the_repository, &rev, 1);
 
 	errs |= post_checkout_hook(head, head, 0);
 	return errs;
@@ -831,7 +831,7 @@ static int switch_branches(const struct checkout_opts *opts,
 	memset(&old_branch_info, 0, sizeof(old_branch_info));
 	old_branch_info.path = path_to_free = resolve_refdup("HEAD", 0, &rev, &flag);
 	if (old_branch_info.path)
-		old_branch_info.commit = lookup_commit_reference_gently(&rev, 1);
+		old_branch_info.commit = lookup_commit_reference_gently(the_repository, &rev, 1);
 	if (!(flag & REF_ISSYMREF))
 		old_branch_info.path = NULL;
 
@@ -1009,7 +1009,7 @@ static int parse_branchname_arg(int argc, const char **argv,
 	else
 		new_branch_info->path = NULL; /* not an existing branch */
 
-	new_branch_info->commit = lookup_commit_reference_gently(rev, 1);
+	new_branch_info->commit = lookup_commit_reference_gently(the_repository, rev, 1);
 	if (!new_branch_info->commit) {
 		/* not a commit */
 		*source_tree = parse_tree_indirect(rev);

builtin/clone.c

@@ -696,7 +696,8 @@ static void update_head(const struct ref *our, const struct ref *remote,
 			install_branch_config(0, head, option_origin, our->name);
 		}
 	} else if (our) {
-		struct commit *c = lookup_commit_reference(&our->old_oid);
+		struct commit *c = lookup_commit_reference(the_repository,
+							   &our->old_oid);
 		/* --branch specifies a non-branch (i.e. tags), detach HEAD */
 		update_ref(msg, "HEAD", &c->object.oid, NULL, REF_NO_DEREF,
 			   UPDATE_REFS_DIE_ON_ERR);

builtin/commit-tree.c

@@ -6,6 +6,7 @@
 #include "cache.h"
 #include "config.h"
 #include "object-store.h"
+#include "repository.h"
 #include "commit.h"
 #include "tree.h"
 #include "builtin.h"
@@ -60,7 +61,8 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix)
 			if (get_oid_commit(argv[i], &oid))
 				die("Not a valid object name %s", argv[i]);
 			assert_oid_type(&oid, OBJ_COMMIT);
-			new_parent(lookup_commit(&oid), &parents);
+			new_parent(lookup_commit(the_repository, &oid),
+						 &parents);
 			continue;
 		}
 

builtin/describe.c

@@ -93,13 +93,13 @@ static int replace_name(struct commit_name *e,
 		struct tag *t;
 
 		if (!e->tag) {
-			t = lookup_tag(&e->oid);
+			t = lookup_tag(the_repository, &e->oid);
 			if (!t || parse_tag(t))
 				return 1;
 			e->tag = t;
 		}
 
-		t = lookup_tag(oid);
+		t = lookup_tag(the_repository, oid);
 		if (!t || parse_tag(t))
 			return 0;
 		*tag = t;
@@ -267,7 +267,7 @@ static unsigned long finish_depth_computation(
 static void append_name(struct commit_name *n, struct strbuf *dst)
 {
 	if (n->prio == 2 && !n->tag) {
-		n->tag = lookup_tag(&n->oid);
+		n->tag = lookup_tag(the_repository, &n->oid);
 		if (!n->tag || parse_tag(n->tag))
 			die(_("annotated tag %s not available"), n->path);
 	}
@@ -303,7 +303,7 @@ static void describe_commit(struct object_id *oid, struct strbuf *dst)
 	unsigned long seen_commits = 0;
 	unsigned int unannotated_cnt = 0;
 
-	cmit = lookup_commit_reference(oid);
+	cmit = lookup_commit_reference(the_repository, oid);
 
 	n = find_commit_name(&cmit->object.oid);
 	if (n && (tags || all || n->prio == 2)) {
@@ -331,7 +331,8 @@ static void describe_commit(struct object_id *oid, struct strbuf *dst)
 		init_commit_names(&commit_names);
 		n = hashmap_iter_first(&names, &iter);
 		for (; n; n = hashmap_iter_next(&iter)) {
-			c = lookup_commit_reference_gently(&n->peeled, 1);
+			c = lookup_commit_reference_gently(the_repository,
+							   &n->peeled, 1);
 			if (c)
 				*commit_names_at(&commit_names, c) = n;
 		}
@@ -509,7 +510,7 @@ static void describe(const char *arg, int last_one)
 
 	if (get_oid(arg, &oid))
 		die(_("Not a valid object name %s"), arg);
-	cmit = lookup_commit_reference_gently(&oid, 1);
+	cmit = lookup_commit_reference_gently(the_repository, &oid, 1);
 
 	if (cmit)
 		describe_commit(&oid, &sb);

builtin/diff-tree.c

@@ -5,12 +5,13 @@
 #include "log-tree.h"
 #include "builtin.h"
 #include "submodule.h"
+#include "repository.h"
 
 static struct rev_info log_tree_opt;
 
 static int diff_tree_commit_oid(const struct object_id *oid)
 {
-	struct commit *commit = lookup_commit_reference(oid);
+	struct commit *commit = lookup_commit_reference(the_repository, oid);
 	if (!commit)
 		return -1;
 	return log_tree_commit(&log_tree_opt, commit);
@@ -24,7 +25,7 @@ static int stdin_diff_commit(struct commit *commit, const char *p)
 
 	/* Graft the fake parents locally to the commit */
 	while (isspace(*p++) && !parse_oid_hex(p, &oid, &p)) {
-		struct commit *parent = lookup_commit(&oid);
+		struct commit *parent = lookup_commit(the_repository, &oid);
 		if (!pptr) {
 			/* Free the real parent list */
 			free_commit_list(commit->parents);
@@ -45,7 +46,7 @@ static int stdin_diff_trees(struct tree *tree1, const char *p)
 	struct tree *tree2;
 	if (!isspace(*p++) || parse_oid_hex(p, &oid, &p) || *p)
 		return error("Need exactly two trees, separated by a space");
-	tree2 = lookup_tree(&oid);
+	tree2 = lookup_tree(the_repository, &oid);
 	if (!tree2 || parse_tree(tree2))
 		return -1;
 	printf("%s %s\n", oid_to_hex(&tree1->object.oid),
@@ -68,7 +69,7 @@ static int diff_tree_stdin(char *line)
 	line[len-1] = 0;
 	if (parse_oid_hex(line, &oid, &p))
 		return -1;
-	obj = parse_object(&oid);
+	obj = parse_object(the_repository, &oid);
 	if (!obj)
 		return -1;
 	if (obj->type == OBJ_COMMIT)

builtin/diff.c

@@ -386,7 +386,8 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
 				add_head_to_pending(&rev);
 				if (!rev.pending.nr) {
 					struct tree *tree;
-					tree = lookup_tree(the_hash_algo->empty_tree);
+					tree = lookup_tree(the_repository,
+							   the_repository->hash_algo->empty_tree);
 					add_pending_object(&rev, &tree->object, "HEAD");
 				}
 				break;
@@ -400,8 +401,8 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
 		const char *name = entry->name;
 		int flags = (obj->flags & UNINTERESTING);
 		if (!obj->parsed)
-			obj = parse_object(&obj->oid);
-		obj = deref_tag(obj, NULL, 0);
+			obj = parse_object(the_repository, &obj->oid);
+		obj = deref_tag(the_repository, obj, NULL, 0);
 		if (!obj)
 			die(_("invalid object '%s' given."), name);
 		if (obj->type == OBJ_COMMIT)

builtin/fast-export.c

@@ -230,13 +230,13 @@ static void export_blob(const struct object_id *oid)
 	if (is_null_oid(oid))
 		return;
 
-	object = lookup_object(oid->hash);
+	object = lookup_object(the_repository, oid->hash);
 	if (object && object->flags & SHOWN)
 		return;
 
 	if (anonymize) {
 		buf = anonymize_blob(&size);
-		object = (struct object *)lookup_blob(oid);
+		object = (struct object *)lookup_blob(the_repository, oid);
 		eaten = 0;
 	} else {
 		buf = read_object_file(oid, &type, &size);
@@ -244,7 +244,8 @@ static void export_blob(const struct object_id *oid)
 			die ("Could not read blob %s", oid_to_hex(oid));
 		if (check_object_signature(oid, buf, size, type_name(type)) < 0)
 			die("sha1 mismatch in blob %s", oid_to_hex(oid));
-		object = parse_object_buffer(oid, type, size, buf, &eaten);
+		object = parse_object_buffer(the_repository, oid, type,
+					     size, buf, &eaten);
 	}
 
 	if (!object)
@@ -402,7 +403,8 @@ static void show_filemodify(struct diff_queue_struct *q,
 						   anonymize_sha1(&spec->oid) :
 						   spec->oid.hash));
 			else {
-				struct object *object = lookup_object(spec->oid.hash);
+				struct object *object = lookup_object(the_repository,
+								      spec->oid.hash);
 				printf("M %06o :%d ", spec->mode,
 				       get_object_mark(object));
 			}
@@ -801,7 +803,7 @@ static struct commit *get_commit(struct rev_cmdline_entry *e, char *full_name)
 
 		/* handle nested tags */
 		while (tag && tag->object.type == OBJ_TAG) {
-			parse_object(&tag->object.oid);
+			parse_object(the_repository, &tag->object.oid);
 			string_list_append(&extra_refs, full_name)->util = tag;
 			tag = (struct tag *)tag->tagged;
 		}
@@ -961,7 +963,7 @@ static void import_marks(char *input_file)
 			/* only commits */
 			continue;
 
-		commit = lookup_commit(&oid);
+		commit = lookup_commit(the_repository, &oid);
 		if (!commit)
 			die("not a commit? can't happen: %s", oid_to_hex(&oid));
 

builtin/fetch.c

@@ -672,8 +672,10 @@ static int update_local_ref(struct ref *ref,
 		return r;
 	}
 
-	current = lookup_commit_reference_gently(&ref->old_oid, 1);
-	updated = lookup_commit_reference_gently(&ref->new_oid, 1);
+	current = lookup_commit_reference_gently(the_repository,
+						 &ref->old_oid, 1);
+	updated = lookup_commit_reference_gently(the_repository,
+						 &ref->new_oid, 1);
 	if (!current || !updated) {
 		const char *msg;
 		const char *what;
@@ -808,7 +810,8 @@ static int store_updated_refs(const char *raw_url, const char *remote_name,
 				continue;
 			}
 
-			commit = lookup_commit_reference_gently(&rm->old_oid,
+			commit = lookup_commit_reference_gently(the_repository,
+								&rm->old_oid,
 								1);
 			if (!commit)
 				rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;

builtin/fmt-merge-msg.c

@@ -11,6 +11,7 @@
 #include "branch.h"
 #include "fmt-merge-msg.h"
 #include "gpg-interface.h"
+#include "repository.h"
 
 static const char * const fmt_merge_msg_usage[] = {
 	N_("git fmt-merge-msg [-m <message>] [--log[=<n>] | --no-log] [--file <file>]"),
@@ -344,7 +345,9 @@ static void shortlog(const char *name,
 	const struct object_id *oid = &origin_data->oid;
 	int limit = opts->shortlog_len;
 
-	branch = deref_tag(parse_object(oid), oid_to_hex(oid), the_hash_algo->hexsz);
+	branch = deref_tag(the_repository, parse_object(the_repository, oid),
+			   oid_to_hex(oid),
+			   the_hash_algo->hexsz);
 	if (!branch || branch->type != OBJ_COMMIT)
 		return;
 
@@ -564,14 +567,14 @@ static void find_merge_parents(struct merge_parents *result,
 		 * "name" here and we do not want to contaminate its
 		 * util field yet.
 		 */
-		obj = parse_object(&oid);
+		obj = parse_object(the_repository, &oid);
 		parent = (struct commit *)peel_to_type(NULL, 0, obj, OBJ_COMMIT);
 		if (!parent)
 			continue;
 		commit_list_insert(parent, &parents);
 		add_merge_parent(result, &obj->oid, &parent->object.oid);
 	}
-	head_commit = lookup_commit(head);
+	head_commit = lookup_commit(the_repository, head);
 	if (head_commit)
 		commit_list_insert(head_commit, &parents);
 	reduce_heads_replace(&parents);

builtin/fsck.c

@@ -72,7 +72,7 @@ static const char *printable_type(struct object *obj)
 		enum object_type type = oid_object_info(the_repository,
 							&obj->oid, NULL);
 		if (type > 0)
-			object_as_type(obj, type, 0);
+			object_as_type(the_repository, obj, type, 0);
 	}
 
 	ret = type_name(obj->type);
@@ -394,7 +394,8 @@ static int fsck_obj_buffer(const struct object_id *oid, enum object_type type,
 	 * verify_packfile(), data_valid variable for details.
 	 */
 	struct object *obj;
-	obj = parse_object_buffer(oid, type, size, buffer, eaten);
+	obj = parse_object_buffer(the_repository, oid, type, size, buffer,
+				  eaten);
 	if (!obj) {
 		errors_found |= ERROR_OBJECT;
 		return error("%s: object corrupt or missing", oid_to_hex(oid));
@@ -412,7 +413,7 @@ static void fsck_handle_reflog_oid(const char *refname, struct object_id *oid,
 	struct object *obj;
 
 	if (!is_null_oid(oid)) {
-		obj = lookup_object(oid->hash);
+		obj = lookup_object(the_repository, oid->hash);
 		if (obj && (obj->flags & HAS_OBJ)) {
 			if (timestamp && name_objects)
 				add_decoration(fsck_walk_options.object_names,
@@ -454,7 +455,7 @@ static int fsck_handle_ref(const char *refname, const struct object_id *oid,
 {
 	struct object *obj;
 
-	obj = parse_object(oid);
+	obj = parse_object(the_repository, oid);
 	if (!obj) {
 		if (is_promisor_object(oid)) {
 			/*
@@ -527,7 +528,9 @@ static int fsck_loose(const struct object_id *oid, const char *path, void *data)
 	if (!contents && type != OBJ_BLOB)
 		BUG("read_loose_object streamed a non-blob");
 
-	obj = parse_object_buffer(oid, type, size, contents, &eaten);
+	obj = parse_object_buffer(the_repository, oid, type, size,
+				  contents, &eaten);
+
 	if (!obj) {
 		errors_found |= ERROR_OBJECT;
 		error("%s: object could not be parsed: %s",
@@ -616,7 +619,7 @@ static int fsck_cache_tree(struct cache_tree *it)
 		fprintf(stderr, "Checking cache tree\n");
 
 	if (0 <= it->entry_count) {
-		struct object *obj = parse_object(&it->oid);
+		struct object *obj = parse_object(the_repository, &it->oid);
 		if (!obj) {
 			error("%s: invalid sha1 pointer in cache-tree",
 			      oid_to_hex(&it->oid));
@@ -765,7 +768,8 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
 		const char *arg = argv[i];
 		struct object_id oid;
 		if (!get_oid(arg, &oid)) {
-			struct object *obj = lookup_object(oid.hash);
+			struct object *obj = lookup_object(the_repository,
+							   oid.hash);
 
 			if (!obj || !(obj->flags & HAS_OBJ)) {
 				if (is_promisor_object(&oid))
@@ -808,7 +812,8 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
 			mode = active_cache[i]->ce_mode;
 			if (S_ISGITLINK(mode))
 				continue;
-			blob = lookup_blob(&active_cache[i]->oid);
+			blob = lookup_blob(the_repository,
+					   &active_cache[i]->oid);
 			if (!blob)
 				continue;
 			obj = &blob->object;

builtin/grep.c

@@ -647,7 +647,8 @@ static int grep_objects(struct grep_opt *opt, const struct pathspec *pathspec,
 
 	for (i = 0; i < nr; i++) {
 		struct object *real_obj;
-		real_obj = deref_tag(list->objects[i].item, NULL, 0);
+		real_obj = deref_tag(the_repository, list->objects[i].item,
+				     NULL, 0);
 
 		/* load the gitmodules file for this rev */
 		if (recurse_submodules) {

builtin/index-pack.c

@@ -832,7 +832,7 @@ static void sha1_object(const void *data, struct object_entry *obj_entry,
 	if (strict || do_fsck_object) {
 		read_lock();
 		if (type == OBJ_BLOB) {
-			struct blob *blob = lookup_blob(oid);
+			struct blob *blob = lookup_blob(the_repository, oid);
 			if (blob)
 				blob->object.flags |= FLAG_CHECKED;
 			else
@@ -851,7 +851,8 @@ static void sha1_object(const void *data, struct object_entry *obj_entry,
 			 * we do not need to free the memory here, as the
 			 * buf is deleted by the caller.
 			 */
-			obj = parse_object_buffer(oid, type, size, buf,
+			obj = parse_object_buffer(the_repository, oid, type,
+						  size, buf,
 						  &eaten);
 			if (!obj)
 				die(_("invalid %s"), type_name(type));

builtin/log.c

@@ -30,6 +30,7 @@
 #include "gpg-interface.h"
 #include "progress.h"
 #include "commit-slab.h"
+#include "repository.h"
 
 #define MAIL_DEFAULT_WRAP 72
 
@@ -619,7 +620,7 @@ int cmd_show(int argc, const char **argv, const char *prefix)
 			rev.shown_one = 1;
 			if (ret)
 				break;
-			o = parse_object(&t->tagged->oid);
+			o = parse_object(the_repository, &t->tagged->oid);
 			if (!o)
 				ret = error(_("Could not read object %s"),
 					    oid_to_hex(&t->tagged->oid));
@@ -906,8 +907,8 @@ static void get_patch_ids(struct rev_info *rev, struct patch_ids *ids)
 	o2 = rev->pending.objects[1].item;
 	flags1 = o1->flags;
 	flags2 = o2->flags;
-	c1 = lookup_commit_reference(&o1->oid);
-	c2 = lookup_commit_reference(&o2->oid);
+	c1 = lookup_commit_reference(the_repository, &o1->oid);
+	c2 = lookup_commit_reference(the_repository, &o2->oid);
 
 	if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 		die(_("Not a range."));
@@ -1864,7 +1865,8 @@ static int add_pending_commit(const char *arg, struct rev_info *revs, int flags)
 {
 	struct object_id oid;
 	if (get_oid(arg, &oid) == 0) {
-		struct commit *commit = lookup_commit_reference(&oid);
+		struct commit *commit = lookup_commit_reference(the_repository,
+								&oid);
 		if (commit) {
 			commit->object.flags |= flags;
 			add_pending_object(revs, &commit->object, arg);

builtin/merge-base.c

@@ -6,6 +6,7 @@
 #include "diff.h"
 #include "revision.h"
 #include "parse-options.h"
+#include "repository.h"
 
 static int show_merge_base(struct commit **rev, int rev_nr, int show_all)
 {
@@ -42,7 +43,7 @@ static struct commit *get_commit_reference(const char *arg)
 
 	if (get_oid(arg, &revkey))
 		die("Not a valid object name %s", arg);
-	r = lookup_commit_reference(&revkey);
+	r = lookup_commit_reference(the_repository, &revkey);
 	if (!r)
 		die("Not a valid commit name %s", arg);
 
@@ -123,7 +124,7 @@ static void add_one_commit(struct object_id *oid, struct rev_collect *revs)
 	if (is_null_oid(oid))
 		return;
 
-	commit = lookup_commit(oid);
+	commit = lookup_commit(the_repository, oid);
 	if (!commit ||
 	    (commit->object.flags & TMP_MARK) ||
 	    parse_commit(commit))
@@ -171,7 +172,7 @@ static int handle_fork_point(int argc, const char **argv)
 	if (get_oid(commitname, &oid))
 		die("Not a valid object name: '%s'", commitname);
 
-	derived = lookup_commit_reference(&oid);
+	derived = lookup_commit_reference(the_repository, &oid);
 	memset(&revs, 0, sizeof(revs));
 	revs.initial = 1;
 	for_each_reflog_ent(refname, collect_one_reflog_ent, &revs);

builtin/merge-tree.c

@@ -2,6 +2,7 @@
 #include "tree-walk.h"
 #include "xdiff-interface.h"
 #include "object-store.h"
+#include "repository.h"
 #include "blob.h"
 #include "exec-cmd.h"
 #include "merge-blobs.h"
@@ -170,7 +171,7 @@ static struct merge_list *create_entry(unsigned stage, unsigned mode, const stru
 	res->stage = stage;
 	res->path = path;
 	res->mode = mode;
-	res->blob = lookup_blob(oid);
+	res->blob = lookup_blob(the_repository, oid);
 	return res;
 }
 

builtin/name-rev.c

@@ -1,5 +1,6 @@
 #include "builtin.h"
 #include "cache.h"
+#include "repository.h"
 #include "config.h"
 #include "commit.h"
 #include "tag.h"
@@ -203,7 +204,7 @@ static int tipcmp(const void *a_, const void *b_)
 
 static int name_ref(const char *path, const struct object_id *oid, int flags, void *cb_data)
 {
-	struct object *o = parse_object(oid);
+	struct object *o = parse_object(the_repository, oid);
 	struct name_ref_data *data = cb_data;
 	int can_abbreviate_output = data->tags_only && data->name_only;
 	int deref = 0;
@@ -261,7 +262,7 @@ static int name_ref(const char *path, const struct object_id *oid, int flags, vo
 		struct tag *t = (struct tag *) o;
 		if (!t->tagged)
 			break; /* broken repository */
-		o = parse_object(&t->tagged->oid);
+		o = parse_object(the_repository, &t->tagged->oid);
 		deref = 1;
 		taggerdate = t->date;
 	}
@@ -378,7 +379,8 @@ static void name_rev_line(char *p, struct name_ref_data *data)
 			*(p+1) = 0;
 			if (!get_oid(p - (GIT_SHA1_HEXSZ - 1), &oid)) {
 				struct object *o =
-					lookup_object(oid.hash);
+					lookup_object(the_repository,
+						      oid.hash);
 				if (o)
 					name = get_rev_name(o, &buf);
 			}
@@ -451,9 +453,10 @@ int cmd_name_rev(int argc, const char **argv, const char *prefix)
 		}
 
 		commit = NULL;
-		object = parse_object(&oid);
+		object = parse_object(the_repository, &oid);
 		if (object) {
-			struct object *peeled = deref_tag(object, *argv, 0);
+			struct object *peeled = deref_tag(the_repository,
+							  object, *argv, 0);
 			if (peeled && peeled->type == OBJ_COMMIT)
 				commit = (struct commit *)peeled;
 		}

builtin/notes.c

@@ -12,6 +12,7 @@
 #include "builtin.h"
 #include "notes.h"
 #include "object-store.h"
+#include "repository.h"
 #include "blob.h"
 #include "pretty.h"
 #include "refs.h"
@@ -711,7 +712,7 @@ static int merge_commit(struct notes_merge_options *o)
 
 	if (get_oid("NOTES_MERGE_PARTIAL", &oid))
 		die(_("failed to read ref NOTES_MERGE_PARTIAL"));
-	else if (!(partial = lookup_commit_reference(&oid)))
+	else if (!(partial = lookup_commit_reference(the_repository, &oid)))
 		die(_("could not find commit from NOTES_MERGE_PARTIAL."));
 	else if (parse_commit(partial))
 		die(_("could not parse commit from NOTES_MERGE_PARTIAL."));

builtin/pack-objects.c

@@ -2474,7 +2474,7 @@ static void add_tag_chain(const struct object_id *oid)
 	if (packlist_find(&to_pack, oid->hash, NULL))
 		return;
 
-	tag = lookup_tag(oid);
+	tag = lookup_tag(the_repository, oid);
 	while (1) {
 		if (!tag || parse_tag(tag) || !tag->tagged)
 			die("unable to pack objects reachable from tag %s",

builtin/prune.c

@@ -40,7 +40,7 @@ static int prune_object(const struct object_id *oid, const char *fullpath,
 	 * Do we know about this object?
 	 * It must have been reachable
 	 */
-	if (lookup_object(oid->hash))
+	if (lookup_object(the_repository, oid->hash))
 		return 0;
 
 	if (lstat(fullpath, &st)) {

builtin/pull.c

@@ -765,10 +765,13 @@ static int get_octopus_merge_base(struct object_id *merge_base,
 {
 	struct commit_list *revs = NULL, *result;
 
-	commit_list_insert(lookup_commit_reference(curr_head), &revs);
-	commit_list_insert(lookup_commit_reference(merge_head), &revs);
+	commit_list_insert(lookup_commit_reference(the_repository, curr_head),
+			   &revs);
+	commit_list_insert(lookup_commit_reference(the_repository, merge_head),
+			   &revs);
 	if (!is_null_oid(fork_point))
-		commit_list_insert(lookup_commit_reference(fork_point), &revs);
+		commit_list_insert(lookup_commit_reference(the_repository, fork_point),
+				   &revs);
 
 	result = get_octopus_merge_bases(revs);
 	free_commit_list(revs);
@@ -944,9 +947,11 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
 			struct commit_list *list = NULL;
 			struct commit *merge_head, *head;
 
-			head = lookup_commit_reference(&orig_head);
+			head = lookup_commit_reference(the_repository,
+						       &orig_head);
 			commit_list_insert(head, &list);
-			merge_head = lookup_commit_reference(&merge_heads.oid[0]);
+			merge_head = lookup_commit_reference(the_repository,
+							     &merge_heads.oid[0]);
 			if (is_descendant_of(merge_head, list)) {
 				/* we can fast-forward this without invoking rebase */
 				opt_ff = "--ff-only";

builtin/receive-pack.c

@@ -1095,8 +1095,8 @@ static const char *update(struct command *cmd, struct shallow_info *si)
 		struct object *old_object, *new_object;
 		struct commit *old_commit, *new_commit;
 
-		old_object = parse_object(old_oid);
-		new_object = parse_object(new_oid);
+		old_object = parse_object(the_repository, old_oid);
+		new_object = parse_object(the_repository, new_oid);
 
 		if (!old_object || !new_object ||
 		    old_object->type != OBJ_COMMIT ||
@@ -1119,7 +1119,7 @@ static const char *update(struct command *cmd, struct shallow_info *si)
 
 	if (is_null_oid(new_oid)) {
 		struct strbuf err = STRBUF_INIT;
-		if (!parse_object(old_oid)) {
+		if (!parse_object(the_repository, old_oid)) {
 			old_oid = NULL;
 			if (ref_exists(name)) {
 				rp_warning("Allowing deletion of corrupt ref.");

builtin/reflog.c

@@ -2,6 +2,7 @@
 #include "config.h"
 #include "lockfile.h"
 #include "object-store.h"
+#include "repository.h"
 #include "commit.h"
 #include "refs.h"
 #include "dir.h"
@@ -65,7 +66,7 @@ static int tree_is_complete(const struct object_id *oid)
 	int complete;
 	struct tree *tree;
 
-	tree = lookup_tree(oid);
+	tree = lookup_tree(the_repository, oid);
 	if (!tree)
 		return 0;
 	if (tree->object.flags & SEEN)
@@ -129,7 +130,7 @@ static int commit_is_complete(struct commit *commit)
 		struct commit_list *parent;
 
 		c = (struct commit *)object_array_pop(&study);
-		if (!c->object.parsed && !parse_object(&c->object.oid))
+		if (!c->object.parsed && !parse_object(the_repository, &c->object.oid))
 			c->object.flags |= INCOMPLETE;
 
 		if (c->object.flags & INCOMPLETE) {
@@ -195,7 +196,7 @@ static int keep_entry(struct commit **it, struct object_id *oid)
 
 	if (is_null_oid(oid))
 		return 1;
-	commit = lookup_commit_reference_gently(oid, 1);
+	commit = lookup_commit_reference_gently(the_repository, oid, 1);
 	if (!commit)
 		return 0;
 
@@ -264,7 +265,8 @@ static int unreachable(struct expire_reflog_policy_cb *cb, struct commit *commit
 		if (is_null_oid(oid))
 			return 0;
 
-		commit = lookup_commit_reference_gently(oid, 1);
+		commit = lookup_commit_reference_gently(the_repository, oid,
+							1);
 
 		/* Not a commit -- keep it */
 		if (!commit)
@@ -321,7 +323,7 @@ static int push_tip_to_list(const char *refname, const struct object_id *oid,
 	struct commit *tip_commit;
 	if (flags & REF_ISSYMREF)
 		return 0;
-	tip_commit = lookup_commit_reference_gently(oid, 1);
+	tip_commit = lookup_commit_reference_gently(the_repository, oid, 1);
 	if (!tip_commit)
 		return 0;
 	commit_list_insert(tip_commit, list);
@@ -338,7 +340,8 @@ static void reflog_expiry_prepare(const char *refname,
 		cb->tip_commit = NULL;
 		cb->unreachable_expire_kind = UE_HEAD;
 	} else {
-		cb->tip_commit = lookup_commit_reference_gently(oid, 1);
+		cb->tip_commit = lookup_commit_reference_gently(the_repository,
+								oid, 1);
 		if (!cb->tip_commit)
 			cb->unreachable_expire_kind = UE_ALWAYS;
 		else

builtin/replace.c

@@ -371,7 +371,7 @@ static int replace_parents(struct strbuf *buf, int argc, const char **argv)
 			return error(_("Not a valid object name: '%s'"),
 				     argv[i]);
 		}
-		if (!lookup_commit_reference(&oid)) {
+		if (!lookup_commit_reference(the_repository, &oid)) {
 			strbuf_release(&new_parents);
 			return error(_("could not parse %s"), argv[i]);
 		}
@@ -402,10 +402,10 @@ static int check_one_mergetag(struct commit *commit,
 	int i;
 
 	hash_object_file(extra->value, extra->len, type_name(OBJ_TAG), &tag_oid);
-	tag = lookup_tag(&tag_oid);
+	tag = lookup_tag(the_repository, &tag_oid);
 	if (!tag)
 		return error(_("bad mergetag in commit '%s'"), ref);
-	if (parse_tag_buffer(tag, extra->value, extra->len))
+	if (parse_tag_buffer(the_repository, tag, extra->value, extra->len))
 		return error(_("malformed mergetag in commit '%s'"), ref);
 
 	/* iterate over new parents */
@@ -443,7 +443,7 @@ static int create_graft(int argc, const char **argv, int force, int gentle)
 
 	if (get_oid(old_ref, &old_oid) < 0)
 		return error(_("Not a valid object name: '%s'"), old_ref);
-	commit = lookup_commit_reference(&old_oid);
+	commit = lookup_commit_reference(the_repository, &old_oid);
 	if (!commit)
 		return error(_("could not parse %s"), old_ref);
 

builtin/reset.c

@@ -319,7 +319,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
 		struct commit *commit;
 		if (get_oid_committish(rev, &oid))
 			die(_("Failed to resolve '%s' as a valid revision."), rev);
-		commit = lookup_commit_reference(&oid);
+		commit = lookup_commit_reference(the_repository, &oid);
 		if (!commit)
 			die(_("Could not parse object '%s'."), rev);
 		oidcpy(&oid, &commit->object.oid);
@@ -396,7 +396,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
 		update_ref_status = reset_refs(rev, &oid);
 
 		if (reset_type == HARD && !update_ref_status && !quiet)
-			print_new_head_line(lookup_commit_reference(&oid));
+			print_new_head_line(lookup_commit_reference(the_repository, &oid));
 	}
 	if (!pathspec.nr)
 		remove_branch_state();

builtin/rev-list.c

@@ -240,7 +240,7 @@ static int finish_object(struct object *obj, const char *name, void *cb_data)
 		return 1;
 	}
 	if (info->revs->verify_objects && !obj->parsed && obj->type != OBJ_COMMIT)
-		parse_object(&obj->oid);
+		parse_object(the_repository, &obj->oid);
 	return 0;
 }
 

builtin/rev-parse.c

@@ -280,8 +280,8 @@ static int try_difference(const char *arg)
 		if (symmetric) {
 			struct commit_list *exclude;
 			struct commit *a, *b;
-			a = lookup_commit_reference(&start_oid);
-			b = lookup_commit_reference(&end_oid);
+			a = lookup_commit_reference(the_repository, &start_oid);
+			b = lookup_commit_reference(the_repository, &end_oid);
 			if (!a || !b) {
 				*dotdot = '.';
 				return 0;
@@ -333,7 +333,7 @@ static int try_parent_shorthands(const char *arg)
 
 	*dotdot = 0;
 	if (get_oid_committish(arg, &oid) ||
-	    !(commit = lookup_commit_reference(&oid))) {
+	    !(commit = lookup_commit_reference(the_repository, &oid))) {
 		*dotdot = '^';
 		return 0;
 	}

builtin/show-branch.c

@@ -378,7 +378,8 @@ static void sort_ref_range(int bottom, int top)
 static int append_ref(const char *refname, const struct object_id *oid,
 		      int allow_dups)
 {
-	struct commit *commit = lookup_commit_reference_gently(oid, 1);
+	struct commit *commit = lookup_commit_reference_gently(the_repository,
+							       oid, 1);
 	int i;
 
 	if (!commit)
@@ -830,7 +831,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 			       MAX_REVS), MAX_REVS);
 		if (get_oid(ref_name[num_rev], &revkey))
 			die(_("'%s' is not a valid ref."), ref_name[num_rev]);
-		commit = lookup_commit_reference(&revkey);
+		commit = lookup_commit_reference(the_repository, &revkey);
 		if (!commit)
 			die(_("cannot find commit %s (%s)"),
 			    ref_name[num_rev], oid_to_hex(&revkey));

builtin/tag.c

@@ -313,7 +313,7 @@ static void create_reflog_msg(const struct object_id *oid, struct strbuf *sb)
 		}
 		free(buf);
 
-		if ((c = lookup_commit_reference(oid)) != NULL)
+		if ((c = lookup_commit_reference(the_repository, oid)) != NULL)
 			strbuf_addf(sb, ", %s", show_date(c->date, 0, DATE_MODE(SHORT)));
 		break;
 	case OBJ_TREE:

builtin/unpack-objects.c

@@ -254,7 +254,7 @@ static void write_object(unsigned nr, enum object_type type,
 		added_object(nr, type, buf, size);
 		free(buf);
 
-		blob = lookup_blob(&obj_list[nr].oid);
+		blob = lookup_blob(the_repository, &obj_list[nr].oid);
 		if (blob)
 			blob->object.flags |= FLAG_WRITTEN;
 		else
@@ -265,7 +265,8 @@ static void write_object(unsigned nr, enum object_type type,
 		int eaten;
 		hash_object_file(buf, size, type_name(type), &obj_list[nr].oid);
 		added_object(nr, type, buf, size);
-		obj = parse_object_buffer(&obj_list[nr].oid, type, size, buf,
+		obj = parse_object_buffer(the_repository, &obj_list[nr].oid,
+					  type, size, buf,
 					  &eaten);
 		if (!obj)
 			die("invalid %s", type_name(type));
@@ -331,7 +332,7 @@ static int resolve_against_held(unsigned nr, const struct object_id *base,
 {
 	struct object *obj;
 	struct obj_buffer *obj_buffer;
-	obj = lookup_object(base->hash);
+	obj = lookup_object(the_repository, base->hash);
 	if (!obj)
 		return 0;
 	obj_buffer = lookup_object_buffer(obj);

builtin/verify-commit.c

@@ -9,6 +9,7 @@
 #include "config.h"
 #include "builtin.h"
 #include "object-store.h"
+#include "repository.h"
 #include "commit.h"
 #include "run-command.h"
 #include <signal.h>
@@ -27,7 +28,8 @@ static int run_gpg_verify(const struct object_id *oid, const char *buf, unsigned
 
 	memset(&signature_check, 0, sizeof(signature_check));
 
-	ret = check_commit_signature(lookup_commit(oid), &signature_check);
+	ret = check_commit_signature(lookup_commit(the_repository, oid),
+				     &signature_check);
 	print_signature_buffer(&signature_check, flags);
 
 	signature_check_clear(&signature_check);

bundle.c

@@ -2,6 +2,7 @@
 #include "lockfile.h"
 #include "bundle.h"
 #include "object-store.h"
+#include "repository.h"
 #include "object.h"
 #include "commit.h"
 #include "diff.h"
@@ -142,7 +143,7 @@ int verify_bundle(struct bundle_header *header, int verbose)
 	init_revisions(&revs, NULL);
 	for (i = 0; i < p->nr; i++) {
 		struct ref_list_entry *e = p->list + i;
-		struct object *o = parse_object(&e->oid);
+		struct object *o = parse_object(the_repository, &e->oid);
 		if (o) {
 			o->flags |= PREREQ_MARK;
 			add_pending_object(&revs, o, e->name);
@@ -167,7 +168,7 @@ int verify_bundle(struct bundle_header *header, int verbose)
 
 	for (i = 0; i < p->nr; i++) {
 		struct ref_list_entry *e = p->list + i;
-		struct object *o = parse_object(&e->oid);
+		struct object *o = parse_object(the_repository, &e->oid);
 		assert(o); /* otherwise we'd have returned early */
 		if (o->flags & SHOWN)
 			continue;
@@ -179,7 +180,7 @@ int verify_bundle(struct bundle_header *header, int verbose)
 	/* Clean up objects used, as they will be reused. */
 	for (i = 0; i < p->nr; i++) {
 		struct ref_list_entry *e = p->list + i;
-		commit = lookup_commit_reference_gently(&e->oid, 1);
+		commit = lookup_commit_reference_gently(the_repository, &e->oid, 1);
 		if (commit)
 			clear_commit_marks(commit, ALL_REV_FLAGS);
 	}
@@ -374,7 +375,8 @@ static int write_bundle_refs(int bundle_fd, struct rev_info *revs)
 			 * in terms of a tag (e.g. v2.0 from the range
 			 * "v1.0..v2.0")?
 			 */
-			struct commit *one = lookup_commit_reference(&oid);
+			struct commit *one = lookup_commit_reference(the_repository,
+								     &oid);
 			struct object *obj;
 
 			if (e->item == &(one->object)) {

cache-tree.c

@@ -671,7 +671,8 @@ static void prime_cache_tree_rec(struct cache_tree *it, struct tree *tree)
 			cnt++;
 		else {
 			struct cache_tree_sub *sub;
-			struct tree *subtree = lookup_tree(entry.oid);
+			struct tree *subtree = lookup_tree(the_repository,
+							   entry.oid);
 			if (!subtree->object.parsed)
 				parse_tree(subtree);
 			sub = cache_tree_sub(it, entry.path);

commit-graph.c

@@ -249,7 +249,7 @@ static struct commit_list **insert_parent_or_die(struct commit_graph *g,
 		die("invalid parent position %"PRIu64, pos);
 
 	hashcpy(oid.hash, g->chunk_oid_lookup + g->hash_len * pos);
-	c = lookup_commit(&oid);
+	c = lookup_commit(the_repository, &oid);
 	if (!c)
 		die("could not find commit %s", oid_to_hex(&oid));
 	c->graph_pos = pos;
@@ -363,7 +363,7 @@ static struct tree *load_tree_for_commit(struct commit_graph *g, struct commit *
 					   GRAPH_DATA_WIDTH * (c->graph_pos);
 
 	hashcpy(oid.hash, commit_data);
-	c->maybe_tree = lookup_tree(&oid);
+	c->maybe_tree = lookup_tree(the_repository, &oid);
 
 	return c->maybe_tree;
 }
@@ -593,7 +593,7 @@ static void close_reachable(struct packed_oid_list *oids)
 	struct commit *commit;
 
 	for (i = 0; i < oids->nr; i++) {
-		commit = lookup_commit(&oids->list[i]);
+		commit = lookup_commit(the_repository, &oids->list[i]);
 		if (commit)
 			commit->object.flags |= UNINTERESTING;
 	}
@@ -604,14 +604,14 @@ static void close_reachable(struct packed_oid_list *oids)
 	 * closure.
 	 */
 	for (i = 0; i < oids->nr; i++) {
-		commit = lookup_commit(&oids->list[i]);
+		commit = lookup_commit(the_repository, &oids->list[i]);
 
 		if (commit && !parse_commit(commit))
 			add_missing_parents(oids, commit);
 	}
 
 	for (i = 0; i < oids->nr; i++) {
-		commit = lookup_commit(&oids->list[i]);
+		commit = lookup_commit(the_repository, &oids->list[i]);
 
 		if (commit)
 			commit->object.flags &= ~UNINTERESTING;
@@ -744,7 +744,7 @@ void write_commit_graph(const char *obj_dir,
 			    parse_oid_hex(commit_hex->items[i].string, &oid, &end))
 				continue;
 
-			result = lookup_commit_reference_gently(&oid, 1);
+			result = lookup_commit_reference_gently(the_repository, &oid, 1);
 
 			if (result) {
 				ALLOC_GROW(oids.list, oids.nr + 1, oids.alloc);
@@ -780,7 +780,7 @@ void write_commit_graph(const char *obj_dir,
 		if (i > 0 && !oidcmp(&oids.list[i-1], &oids.list[i]))
 			continue;
 
-		commits.list[commits.nr] = lookup_commit(&oids.list[i]);
+		commits.list[commits.nr] = lookup_commit(the_repository, &oids.list[i]);
 		parse_commit(commits.list[commits.nr]);
 
 		for (parent = commits.list[commits.nr]->parents;
@@ -924,7 +924,7 @@ int verify_commit_graph(struct repository *r, struct commit_graph *g)
 			cur_fanout_pos++;
 		}
 
-		graph_commit = lookup_commit(&cur_oid);
+		graph_commit = lookup_commit(r, &cur_oid);
 		if (!parse_commit_in_graph_one(g, graph_commit))
 			graph_report("failed to parse %s from commit-graph",
 				     oid_to_hex(&cur_oid));
@@ -950,7 +950,7 @@ int verify_commit_graph(struct repository *r, struct commit_graph *g)
 
 		hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i);
 
-		graph_commit = lookup_commit(&cur_oid);
+		graph_commit = lookup_commit(r, &cur_oid);
 		odb_commit = (struct commit *)create_object(r, cur_oid.hash, alloc_commit_node(r));
 		if (parse_commit_internal(odb_commit, 0, 0)) {
 			graph_report("failed to parse %s from object database",

commit-slab-impl.h

@@ -11,8 +11,6 @@
 
 #define implement_commit_slab(slabname, elemtype, scope)		\
 									\
-static int stat_ ##slabname## realloc;					\
-									\
 scope void init_ ##slabname## _with_stride(struct slabname *s,		\
 						   unsigned stride)	\
 {									\
@@ -54,7 +52,6 @@ scope elemtype *slabname## _at_peek(struct slabname *s,			\
 		if (!add_if_missing)					\
 			return NULL;					\
 		REALLOC_ARRAY(s->slab, nth_slab + 1);			\
-		stat_ ##slabname## realloc++;				\
 		for (i = s->slab_count; i <= nth_slab; i++)		\
 			s->slab[i] = NULL;				\
 		s->slab_count = nth_slab + 1;				\

commit.c

@@ -24,24 +24,26 @@ int save_commit_buffer = 1;
 
 const char *commit_type = "commit";
 
-struct commit *lookup_commit_reference_gently(const struct object_id *oid,
-					      int quiet)
+struct commit *lookup_commit_reference_gently(struct repository *r,
+		const struct object_id *oid, int quiet)
 {
-	struct object *obj = deref_tag(parse_object(oid), NULL, 0);
+	struct object *obj = deref_tag(r,
+				       parse_object(r, oid),
+				       NULL, 0);
 
 	if (!obj)
 		return NULL;
-	return object_as_type(obj, OBJ_COMMIT, quiet);
+	return object_as_type(r, obj, OBJ_COMMIT, quiet);
 }
 
-struct commit *lookup_commit_reference(const struct object_id *oid)
+struct commit *lookup_commit_reference(struct repository *r, const struct object_id *oid)
 {
-	return lookup_commit_reference_gently(oid, 0);
+	return lookup_commit_reference_gently(r, oid, 0);
 }
 
 struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref_name)
 {
-	struct commit *c = lookup_commit_reference(oid);
+	struct commit *c = lookup_commit_reference(the_repository, oid);
 	if (!c)
 		die(_("could not parse %s"), ref_name);
 	if (oidcmp(oid, &c->object.oid)) {
@@ -51,13 +53,13 @@ struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref
 	return c;
 }
 
-struct commit *lookup_commit(const struct object_id *oid)
+struct commit *lookup_commit(struct repository *r, const struct object_id *oid)
 {
-	struct object *obj = lookup_object(oid->hash);
+	struct object *obj = lookup_object(r, oid->hash);
 	if (!obj)
-		return create_object(the_repository, oid->hash,
-				     alloc_commit_node(the_repository));
-	return object_as_type(obj, OBJ_COMMIT, 0);
+		return create_object(r, oid->hash,
+				     alloc_commit_node(r));
+	return object_as_type(r, obj, OBJ_COMMIT, 0);
 }
 
 struct commit *lookup_commit_reference_by_name(const char *name)
@@ -67,7 +69,7 @@ struct commit *lookup_commit_reference_by_name(const char *name)
 
 	if (get_oid_committish(name, &oid))
 		return NULL;
-	commit = lookup_commit_reference(&oid);
+	commit = lookup_commit_reference(the_repository, &oid);
 	if (parse_commit(commit))
 		return NULL;
 	return commit;
@@ -259,18 +261,32 @@ struct commit_buffer {
 	unsigned long size;
 };
 define_commit_slab(buffer_slab, struct commit_buffer);
-static struct buffer_slab buffer_slab = COMMIT_SLAB_INIT(1, buffer_slab);
 
-void set_commit_buffer(struct commit *commit, void *buffer, unsigned long size)
+struct buffer_slab *allocate_commit_buffer_slab(void)
 {
-	struct commit_buffer *v = buffer_slab_at(&buffer_slab, commit);
+	struct buffer_slab *bs = xmalloc(sizeof(*bs));
+	init_buffer_slab(bs);
+	return bs;
+}
+
+void free_commit_buffer_slab(struct buffer_slab *bs)
+{
+	clear_buffer_slab(bs);
+	free(bs);
+}
+
+void set_commit_buffer(struct repository *r, struct commit *commit, void *buffer, unsigned long size)
+{
+	struct commit_buffer *v = buffer_slab_at(
+		r->parsed_objects->buffer_slab, commit);
 	v->buffer = buffer;
 	v->size = size;
 }
 
-const void *get_cached_commit_buffer(const struct commit *commit, unsigned long *sizep)
+const void *get_cached_commit_buffer(struct repository *r, const struct commit *commit, unsigned long *sizep)
 {
-	struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit);
+	struct commit_buffer *v = buffer_slab_peek(
+		r->parsed_objects->buffer_slab, commit);
 	if (!v) {
 		if (sizep)
 			*sizep = 0;
@@ -283,7 +299,7 @@ const void *get_cached_commit_buffer(const struct commit *commit, unsigned long
 
 const void *get_commit_buffer(const struct commit *commit, unsigned long *sizep)
 {
-	const void *ret = get_cached_commit_buffer(commit, sizep);
+	const void *ret = get_cached_commit_buffer(the_repository, commit, sizep);
 	if (!ret) {
 		enum object_type type;
 		unsigned long size;
@@ -302,14 +318,16 @@ const void *get_commit_buffer(const struct commit *commit, unsigned long *sizep)
 
 void unuse_commit_buffer(const struct commit *commit, const void *buffer)
 {
-	struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit);
+	struct commit_buffer *v = buffer_slab_peek(
+		the_repository->parsed_objects->buffer_slab, commit);
 	if (!(v && v->buffer == buffer))
 		free((void *)buffer);
 }
 
 void free_commit_buffer(struct commit *commit)
 {
-	struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit);
+	struct commit_buffer *v = buffer_slab_peek(
+		the_repository->parsed_objects->buffer_slab, commit);
 	if (v) {
 		FREE_AND_NULL(v->buffer);
 		v->size = 0;
@@ -345,7 +363,8 @@ void release_commit_memory(struct commit *c)
 
 const void *detach_commit_buffer(struct commit *commit, unsigned long *sizep)
 {
-	struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit);
+	struct commit_buffer *v = buffer_slab_peek(
+		the_repository->parsed_objects->buffer_slab, commit);
 	void *ret;
 
 	if (!v) {
@@ -362,7 +381,7 @@ const void *detach_commit_buffer(struct commit *commit, unsigned long *sizep)
 	return ret;
 }
 
-int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long size, int check_graph)
+int parse_commit_buffer(struct repository *r, struct commit *item, const void *buffer, unsigned long size, int check_graph)
 {
 	const char *tail = buffer;
 	const char *bufptr = buffer;
@@ -382,11 +401,11 @@ int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long s
 	if (get_oid_hex(bufptr + 5, &parent) < 0)
 		return error("bad tree pointer in commit %s",
 			     oid_to_hex(&item->object.oid));
-	item->maybe_tree = lookup_tree(&parent);
+	item->maybe_tree = lookup_tree(r, &parent);
 	bufptr += tree_entry_len + 1; /* "tree " + "hex sha1" + "\n" */
 	pptr = &item->parents;
 
-	graft = lookup_commit_graft(the_repository, &item->object.oid);
+	graft = lookup_commit_graft(r, &item->object.oid);
 	while (bufptr + parent_entry_len < tail && !memcmp(bufptr, "parent ", 7)) {
 		struct commit *new_parent;
 
@@ -401,7 +420,7 @@ int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long s
 		 */
 		if (graft && (graft->nr_parent < 0 || grafts_replace_parents))
 			continue;
-		new_parent = lookup_commit(&parent);
+		new_parent = lookup_commit(r, &parent);
 		if (new_parent)
 			pptr = &commit_list_insert(new_parent, pptr)->next;
 	}
@@ -409,7 +428,8 @@ int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long s
 		int i;
 		struct commit *new_parent;
 		for (i = 0; i < graft->nr_parent; i++) {
-			new_parent = lookup_commit(&graft->parent[i]);
+			new_parent = lookup_commit(r,
+						   &graft->parent[i]);
 			if (!new_parent)
 				continue;
 			pptr = &commit_list_insert(new_parent, pptr)->next;
@@ -447,9 +467,9 @@ int parse_commit_internal(struct commit *item, int quiet_on_missing, int use_com
 			     oid_to_hex(&item->object.oid));
 	}
 
-	ret = parse_commit_buffer(item, buffer, size, 0);
+	ret = parse_commit_buffer(the_repository, item, buffer, size, 0);
 	if (save_commit_buffer && !ret) {
-		set_commit_buffer(item, buffer, size);
+		set_commit_buffer(the_repository, item, buffer, size);
 		return 0;
 	}
 	free(buffer);
@@ -1698,7 +1718,7 @@ struct commit *get_merge_parent(const char *name)
 	struct object_id oid;
 	if (get_oid(name, &oid))
 		return NULL;
-	obj = parse_object(&oid);
+	obj = parse_object(the_repository, &oid);
 	commit = (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT);
 	if (commit && !merge_remote_util(commit))
 		set_merge_remote_desc(commit, name, obj);

commit.h

@@ -63,9 +63,11 @@ enum decoration_type {
 void add_name_decoration(enum decoration_type type, const char *name, struct object *obj);
 const struct name_decoration *get_name_decoration(const struct object *obj);
 
-struct commit *lookup_commit(const struct object_id *oid);
-struct commit *lookup_commit_reference(const struct object_id *oid);
-struct commit *lookup_commit_reference_gently(const struct object_id *oid,
+struct commit *lookup_commit(struct repository *r, const struct object_id *oid);
+struct commit *lookup_commit_reference(struct repository *r,
+				       const struct object_id *oid);
+struct commit *lookup_commit_reference_gently(struct repository *r,
+					      const struct object_id *oid,
 					      int quiet);
 struct commit *lookup_commit_reference_by_name(const char *name);
 
@@ -76,7 +78,7 @@ struct commit *lookup_commit_reference_by_name(const char *name);
  */
 struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref_name);
 
-int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long size, int check_graph);
+int parse_commit_buffer(struct repository *r, struct commit *item, const void *buffer, unsigned long size, int check_graph);
 int parse_commit_internal(struct commit *item, int quiet_on_missing, int use_commit_graph);
 int parse_commit_gently(struct commit *item, int quiet_on_missing);
 static inline int parse_commit(struct commit *item)
@@ -85,17 +87,21 @@ static inline int parse_commit(struct commit *item)
 }
 void parse_commit_or_die(struct commit *item);
 
+struct buffer_slab;
+struct buffer_slab *allocate_commit_buffer_slab(void);
+void free_commit_buffer_slab(struct buffer_slab *bs);
+
 /*
  * Associate an object buffer with the commit. The ownership of the
  * memory is handed over to the commit, and must be free()-able.
  */
-void set_commit_buffer(struct commit *, void *buffer, unsigned long size);
+void set_commit_buffer(struct repository *r, struct commit *, void *buffer, unsigned long size);
 
 /*
  * Get any cached object buffer associated with the commit. Returns NULL
  * if none. The resulting memory should not be freed.
  */
-const void *get_cached_commit_buffer(const struct commit *, unsigned long *size);
+const void *get_cached_commit_buffer(struct repository *, const struct commit *, unsigned long *size);
 
 /*
  * Get the commit's object contents, either from cache or by reading the object

fast-import.c

@@ -1724,8 +1724,10 @@ static int update_branch(struct branch *b)
 	if (!force_update && !is_null_oid(&old_oid)) {
 		struct commit *old_cmit, *new_cmit;
 
-		old_cmit = lookup_commit_reference_gently(&old_oid, 0);
-		new_cmit = lookup_commit_reference_gently(&b->oid, 0);
+		old_cmit = lookup_commit_reference_gently(the_repository,
+							  &old_oid, 0);
+		new_cmit = lookup_commit_reference_gently(the_repository,
+							  &b->oid, 0);
 		if (!old_cmit || !new_cmit)
 			return error("Branch %s is missing commits.", b->name);
 

fetch-pack.c

@@ -78,7 +78,7 @@ static void cache_one_alternate(const char *refname,
 				void *vcache)
 {
 	struct alternate_object_cache *cache = vcache;
-	struct object *obj = parse_object(oid);
+	struct object *obj = parse_object(the_repository, oid);
 
 	if (!obj || (obj->flags & ALTERNATE))
 		return;
@@ -109,7 +109,9 @@ static int rev_list_insert_ref(struct fetch_negotiator *negotiator,
 			       const char *refname,
 			       const struct object_id *oid)
 {
-	struct object *o = deref_tag(parse_object(oid), refname, 0);
+	struct object *o = deref_tag(the_repository,
+				     parse_object(the_repository, oid),
+				     refname, 0);
 
 	if (o && o->type == OBJ_COMMIT)
 		negotiator->add_tip(negotiator, (struct commit *)o);
@@ -251,7 +253,7 @@ static int find_common(struct fetch_negotiator *negotiator,
 		 * interested in the case we *know* the object is
 		 * reachable and we have already scanned it.
 		 */
-		if (((o = lookup_object(remote->hash)) != NULL) &&
+		if (((o = lookup_object(the_repository, remote->hash)) != NULL) &&
 				(o->flags & COMPLETE)) {
 			continue;
 		}
@@ -325,10 +327,10 @@ static int find_common(struct fetch_negotiator *negotiator,
 			if (skip_prefix(line, "unshallow ", &arg)) {
 				if (get_oid_hex(arg, &oid))
 					die(_("invalid unshallow line: %s"), line);
-				if (!lookup_object(oid.hash))
+				if (!lookup_object(the_repository, oid.hash))
 					die(_("object not found: %s"), line);
 				/* make sure that it is parsed as shallow */
-				if (!parse_object(&oid))
+				if (!parse_object(the_repository, &oid))
 					die(_("error in object: %s"), line);
 				if (unregister_shallow(&oid))
 					die(_("no shallow found: %s"), line);
@@ -387,8 +389,10 @@ static int find_common(struct fetch_negotiator *negotiator,
 				case ACK_ready:
 				case ACK_continue: {
 					struct commit *commit =
-						lookup_commit(result_oid);
+						lookup_commit(the_repository,
+							      result_oid);
 					int was_common;
+
 					if (!commit)
 						die(_("invalid commit %s"), oid_to_hex(result_oid));
 					was_common = negotiator->ack(negotiator, commit);
@@ -462,14 +466,14 @@ static struct commit_list *complete;
 
 static int mark_complete(const struct object_id *oid)
 {
-	struct object *o = parse_object(oid);
+	struct object *o = parse_object(the_repository, oid);
 
 	while (o && o->type == OBJ_TAG) {
 		struct tag *t = (struct tag *) o;
 		if (!t->tagged)
 			break; /* broken repository */
 		o->flags |= COMPLETE;
-		o = parse_object(&t->tagged->oid);
+		o = parse_object(the_repository, &t->tagged->oid);
 	}
 	if (o && o->type == OBJ_COMMIT) {
 		struct commit *commit = (struct commit *)o;
@@ -670,7 +674,7 @@ static void mark_complete_and_common_ref(struct fetch_negotiator *negotiator,
 
 		if (!has_object_file_with_flags(&ref->old_oid, flags))
 			continue;
-		o = parse_object(&ref->old_oid);
+		o = parse_object(the_repository, &ref->old_oid);
 		if (!o)
 			continue;
 
@@ -701,7 +705,9 @@ static void mark_complete_and_common_ref(struct fetch_negotiator *negotiator,
 		 * Don't mark them common yet; the server has to be told so first.
 		 */
 		for (ref = *refs; ref; ref = ref->next) {
-			struct object *o = deref_tag(lookup_object(ref->old_oid.hash),
+			struct object *o = deref_tag(the_repository,
+						     lookup_object(the_repository,
+						     ref->old_oid.hash),
 						     NULL, 0);
 
 			if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE))
@@ -729,7 +735,7 @@ static int everything_local(struct fetch_pack_args *args,
 		const struct object_id *remote = &ref->old_oid;
 		struct object *o;
 
-		o = lookup_object(remote->hash);
+		o = lookup_object(the_repository, remote->hash);
 		if (!o || !(o->flags & COMPLETE)) {
 			retval = 0;
 			print_verbose(args, "want %s (%s)", oid_to_hex(remote),
@@ -1032,7 +1038,7 @@ static void add_wants(const struct ref *wants, struct strbuf *req_buf)
 		 * interested in the case we *know* the object is
 		 * reachable and we have already scanned it.
 		 */
-		if (((o = lookup_object(remote->hash)) != NULL) &&
+		if (((o = lookup_object(the_repository, remote->hash)) != NULL) &&
 		    (o->flags & COMPLETE)) {
 			continue;
 		}
@@ -1196,7 +1202,7 @@ static int process_acks(struct fetch_negotiator *negotiator,
 			if (!get_oid_hex(arg, &oid)) {
 				struct commit *commit;
 				oidset_insert(common, &oid);
-				commit = lookup_commit(&oid);
+				commit = lookup_commit(the_repository, &oid);
 				negotiator->ack(negotiator, commit);
 			}
 			continue;
@@ -1235,10 +1241,10 @@ static void receive_shallow_info(struct fetch_pack_args *args,
 		if (skip_prefix(reader->line, "unshallow ", &arg)) {
 			if (get_oid_hex(arg, &oid))
 				die(_("invalid unshallow line: %s"), reader->line);
-			if (!lookup_object(oid.hash))
+			if (!lookup_object(the_repository, oid.hash))
 				die(_("object not found: %s"), reader->line);
 			/* make sure that it is parsed as shallow */
-			if (!parse_object(&oid))
+			if (!parse_object(the_repository, &oid))
 				die(_("error in object: %s"), reader->line);
 			if (unregister_shallow(&oid))
 				die(_("no shallow found: %s"), reader->line);

fsck.c

@@ -1,5 +1,6 @@
 #include "cache.h"
 #include "object-store.h"
+#include "repository.h"
 #include "object.h"
 #include "blob.h"
 #include "tree.h"
@@ -413,14 +414,14 @@ static int fsck_walk_tree(struct tree *tree, void *data, struct fsck_options *op
 			continue;
 
 		if (S_ISDIR(entry.mode)) {
-			obj = (struct object *)lookup_tree(entry.oid);
+			obj = (struct object *)lookup_tree(the_repository, entry.oid);
 			if (name && obj)
 				put_object_name(options, obj, "%s%s/", name,
 					entry.path);
 			result = options->walk(obj, OBJ_TREE, data, options);
 		}
 		else if (S_ISREG(entry.mode) || S_ISLNK(entry.mode)) {
-			obj = (struct object *)lookup_blob(entry.oid);
+			obj = (struct object *)lookup_blob(the_repository, entry.oid);
 			if (name && obj)
 				put_object_name(options, obj, "%s%s", name,
 					entry.path);
@@ -518,7 +519,7 @@ int fsck_walk(struct object *obj, void *data, struct fsck_options *options)
 		return -1;
 
 	if (obj->type == OBJ_NONE)
-		parse_object(&obj->oid);
+		parse_object(the_repository, &obj->oid);
 
 	switch (obj->type) {
 	case OBJ_BLOB:
@@ -1081,7 +1082,7 @@ int fsck_finish(struct fsck_options *options)
 		if (oidset_contains(&gitmodules_done, oid))
 			continue;
 
-		blob = lookup_blob(oid);
+		blob = lookup_blob(the_repository, oid);
 		if (!blob) {
 			struct object *obj = lookup_unknown_object(oid->hash);
 			ret |= report(options, obj,

http-backend.c

@@ -436,13 +436,13 @@ static int show_text_ref(const char *name, const struct object_id *oid,
 {
 	const char *name_nons = strip_namespace(name);
 	struct strbuf *buf = cb_data;
-	struct object *o = parse_object(oid);
+	struct object *o = parse_object(the_repository, oid);
 	if (!o)
 		return 0;
 
 	strbuf_addf(buf, "%s\t%s\n", oid_to_hex(oid), name_nons);
 	if (o->type == OBJ_TAG) {
-		o = deref_tag(o, name, 0);
+		o = deref_tag(the_repository, o, name, 0);
 		if (!o)
 			return 0;
 		strbuf_addf(buf, "%s\t%s^{}\n", oid_to_hex(&o->oid),

http-push.c

@@ -1,4 +1,5 @@
 #include "cache.h"
+#include "repository.h"
 #include "commit.h"
 #include "tag.h"
 #include "blob.h"
@@ -14,6 +15,7 @@
 #include "packfile.h"
 #include "object-store.h"
 
+
 #ifdef EXPAT_NEEDS_XMLPARSE_H
 #include <xmlparse.h>
 #else
@@ -720,9 +722,9 @@ static void one_remote_object(const struct object_id *oid)
 {
 	struct object *obj;
 
-	obj = lookup_object(oid->hash);
+	obj = lookup_object(the_repository, oid->hash);
 	if (!obj)
-		obj = parse_object(oid);
+		obj = parse_object(the_repository, oid);
 
 	/* Ignore remote objects that don't exist locally */
 	if (!obj)
@@ -1309,10 +1311,12 @@ static struct object_list **process_tree(struct tree *tree,
 	while (tree_entry(&desc, &entry))
 		switch (object_type(entry.mode)) {
 		case OBJ_TREE:
-			p = process_tree(lookup_tree(entry.oid), p);
+			p = process_tree(lookup_tree(the_repository, entry.oid),
+					 p);
 			break;
 		case OBJ_BLOB:
-			p = process_blob(lookup_blob(entry.oid), p);
+			p = process_blob(lookup_blob(the_repository, entry.oid),
+					 p);
 			break;
 		default:
 			/* Subproject commit - not in this repository */
@@ -1459,7 +1463,7 @@ static void add_remote_info_ref(struct remote_ls_ctx *ls)
 		return;
 	}
 
-	o = parse_object(&ref->old_oid);
+	o = parse_object(the_repository, &ref->old_oid);
 	if (!o) {
 		fprintf(stderr,
 			"Unable to parse object %s for remote ref %s\n",
@@ -1473,7 +1477,7 @@ static void add_remote_info_ref(struct remote_ls_ctx *ls)
 		    oid_to_hex(&ref->old_oid), ls->dentry_name);
 
 	if (o->type == OBJ_TAG) {
-		o = deref_tag(o, ls->dentry_name, 0);
+		o = deref_tag(the_repository, o, ls->dentry_name, 0);
 		if (o)
 			strbuf_addf(buf, "%s\t%s^{}\n",
 				    oid_to_hex(&o->oid), ls->dentry_name);

line-log.c

@@ -479,7 +479,7 @@ static struct commit *check_single_commit(struct rev_info *revs)
 		struct object *obj = revs->pending.objects[i].item;
 		if (obj->flags & UNINTERESTING)
 			continue;
-		obj = deref_tag(obj, NULL, 0);
+		obj = deref_tag(the_repository, obj, NULL, 0);
 		if (obj->type != OBJ_COMMIT)
 			die("Non commit %s?", revs->pending.objects[i].name);
 		if (commit)

list-objects.c

@@ -158,7 +158,7 @@ static void process_tree(struct rev_info *revs,
 
 		if (S_ISDIR(entry.mode))
 			process_tree(revs,
-				     lookup_tree(entry.oid),
+				     lookup_tree(the_repository, entry.oid),
 				     show, base, entry.path,
 				     cb_data, filter_fn, filter_data);
 		else if (S_ISGITLINK(entry.mode))
@@ -167,7 +167,7 @@ static void process_tree(struct rev_info *revs,
 					cb_data);
 		else
 			process_blob(revs,
-				     lookup_blob(entry.oid),
+				     lookup_blob(the_repository, entry.oid),
 				     show, base, entry.path,
 				     cb_data, filter_fn, filter_data);
 	}

log-tree.c

@@ -2,6 +2,7 @@
 #include "config.h"
 #include "diff.h"
 #include "object-store.h"
+#include "repository.h"
 #include "commit.h"
 #include "tag.h"
 #include "graph.h"
@@ -98,13 +99,13 @@ static int add_ref_decoration(const char *refname, const struct object_id *oid,
 			warning("invalid replace ref %s", refname);
 			return 0;
 		}
-		obj = parse_object(&original_oid);
+		obj = parse_object(the_repository, &original_oid);
 		if (obj)
 			add_name_decoration(DECORATION_GRAFTED, "replaced", obj);
 		return 0;
 	}
 
-	obj = parse_object(oid);
+	obj = parse_object(the_repository, oid);
 	if (!obj)
 		return 0;
 
@@ -125,7 +126,7 @@ static int add_ref_decoration(const char *refname, const struct object_id *oid,
 		if (!obj)
 			break;
 		if (!obj->parsed)
-			parse_object(&obj->oid);
+			parse_object(the_repository, &obj->oid);
 		add_name_decoration(DECORATION_REF_TAG, refname, obj);
 	}
 	return 0;
@@ -133,7 +134,7 @@ static int add_ref_decoration(const char *refname, const struct object_id *oid,
 
 static int add_graft_decoration(const struct commit_graft *graft, void *cb_data)
 {
-	struct commit *commit = lookup_commit(&graft->oid);
+	struct commit *commit = lookup_commit(the_repository, &graft->oid);
 	if (!commit)
 		return 0;
 	add_name_decoration(DECORATION_GRAFTED, "grafted", &commit->object);
@@ -497,12 +498,12 @@ static int show_one_mergetag(struct commit *commit,
 	size_t payload_size, gpg_message_offset;
 
 	hash_object_file(extra->value, extra->len, type_name(OBJ_TAG), &oid);
-	tag = lookup_tag(&oid);
+	tag = lookup_tag(the_repository, &oid);
 	if (!tag)
 		return -1; /* error message already given */
 
 	strbuf_init(&verify_message, 256);
-	if (parse_tag_buffer(tag, extra->value, extra->len))
+	if (parse_tag_buffer(the_repository, tag, extra->value, extra->len))
 		strbuf_addstr(&verify_message, "malformed mergetag\n");
 	else if (is_common_merge(commit) &&
 		 !oidcmp(&tag->tagged->oid,

merge-recursive.c

@@ -9,6 +9,7 @@
 #include "lockfile.h"
 #include "cache-tree.h"
 #include "object-store.h"
+#include "repository.h"
 #include "commit.h"
 #include "blob.h"
 #include "builtin.h"
@@ -157,7 +158,7 @@ static struct tree *shift_tree_object(struct tree *one, struct tree *two,
 	}
 	if (!oidcmp(&two->object.oid, &shifted))
 		return two;
-	return lookup_tree(&shifted);
+	return lookup_tree(the_repository, &shifted);
 }
 
 static struct commit *make_virtual_commit(struct tree *tree, const char *comment)
@@ -415,7 +416,7 @@ struct tree *write_tree_from_memory(struct merge_options *o)
 		return NULL;
 	}
 
-	result = lookup_tree(&active_cache_tree->oid);
+	result = lookup_tree(the_repository, &active_cache_tree->oid);
 
 	return result;
 }
@@ -1191,9 +1192,9 @@ static int merge_submodule(struct merge_options *o,
 		return 0;
 	}
 
-	if (!(commit_base = lookup_commit_reference(base)) ||
-	    !(commit_a = lookup_commit_reference(a)) ||
-	    !(commit_b = lookup_commit_reference(b))) {
+	if (!(commit_base = lookup_commit_reference(the_repository, base)) ||
+	    !(commit_a = lookup_commit_reference(the_repository, a)) ||
+	    !(commit_b = lookup_commit_reference(the_repository, b))) {
 		output(o, 1, _("Failed to merge submodule %s (commits not present)"), path);
 		return 0;
 	}
@@ -3426,7 +3427,7 @@ int merge_recursive(struct merge_options *o,
 		/* if there is no common ancestor, use an empty tree */
 		struct tree *tree;
 
-		tree = lookup_tree(the_hash_algo->empty_tree);
+		tree = lookup_tree(the_repository, the_repository->hash_algo->empty_tree);
 		merged_common_ancestors = make_virtual_commit(tree, "ancestor");
 	}
 
@@ -3488,7 +3489,9 @@ static struct commit *get_ref(const struct object_id *oid, const char *name)
 {
 	struct object *object;
 
-	object = deref_tag(parse_object(oid), name, strlen(name));
+	object = deref_tag(the_repository, parse_object(the_repository, oid),
+			   name,
+			   strlen(name));
 	if (!object)
 		return NULL;
 	if (object->type == OBJ_TREE)

negotiator/default.c

@@ -38,7 +38,7 @@ static void rev_list_push(struct negotiation_state *ns,
 static int clear_marks(const char *refname, const struct object_id *oid,
 		       int flag, void *cb_data)
 {
-	struct object *o = deref_tag(parse_object(oid), refname, 0);
+	struct object *o = deref_tag(the_repository, parse_object(the_repository, oid), refname, 0);
 
 	if (o && o->type == OBJ_COMMIT)
 		clear_commit_marks((struct commit *)o,

notes-cache.c

@@ -1,6 +1,7 @@
 #include "cache.h"
 #include "notes-cache.h"
 #include "object-store.h"
+#include "repository.h"
 #include "commit.h"
 #include "refs.h"
 
@@ -15,7 +16,7 @@ static int notes_cache_match_validity(const char *ref, const char *validity)
 	if (read_ref(ref, &oid) < 0)
 		return 0;
 
-	commit = lookup_commit_reference_gently(&oid, 1);
+	commit = lookup_commit_reference_gently(the_repository, &oid, 1);
 	if (!commit)
 		return 0;
 

notes-merge.c

@@ -2,6 +2,7 @@
 #include "commit.h"
 #include "refs.h"
 #include "object-store.h"
+#include "repository.h"
 #include "diff.h"
 #include "diffcore.h"
 #include "xdiff-interface.h"
@@ -553,7 +554,7 @@ int notes_merge(struct notes_merge_options *o,
 	else if (!check_refname_format(o->local_ref, 0) &&
 		is_null_oid(&local_oid))
 		local = NULL; /* local_oid == null_oid indicates unborn ref */
-	else if (!(local = lookup_commit_reference(&local_oid)))
+	else if (!(local = lookup_commit_reference(the_repository, &local_oid)))
 		die("Could not parse local commit %s (%s)",
 		    oid_to_hex(&local_oid), o->local_ref);
 	trace_printf("\tlocal commit: %.7s\n", oid_to_hex(&local_oid));
@@ -571,7 +572,7 @@ int notes_merge(struct notes_merge_options *o,
 			die("Failed to resolve remote notes ref '%s'",
 			    o->remote_ref);
 		}
-	} else if (!(remote = lookup_commit_reference(&remote_oid))) {
+	} else if (!(remote = lookup_commit_reference(the_repository, &remote_oid))) {
 		die("Could not parse remote commit %s (%s)",
 		    oid_to_hex(&remote_oid), o->remote_ref);
 	}

notes-utils.c

@@ -3,6 +3,7 @@
 #include "commit.h"
 #include "refs.h"
 #include "notes-utils.h"
+#include "repository.h"
 
 void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 			 const char *msg, size_t msg_len,
@@ -19,7 +20,8 @@ void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 		/* Deduce parent commit from t->ref */
 		struct object_id parent_oid;
 		if (!read_ref(t->ref, &parent_oid)) {
-			struct commit *parent = lookup_commit(&parent_oid);
+			struct commit *parent = lookup_commit(the_repository,
+							      &parent_oid);
 			if (parse_commit(parent))
 				die("Failed to find/parse commit %s", t->ref);
 			commit_list_insert(parent, &parents);

object.c

@@ -84,21 +84,20 @@ static void insert_obj_hash(struct object *obj, struct object **hash, unsigned i
  * Look up the record for the given sha1 in the hash map stored in
  * obj_hash.  Return NULL if it was not found.
  */
-struct object *lookup_object(const unsigned char *sha1)
+struct object *lookup_object(struct repository *r, const unsigned char *sha1)
 {
 	unsigned int i, first;
 	struct object *obj;
 
-	if (!the_repository->parsed_objects->obj_hash)
+	if (!r->parsed_objects->obj_hash)
 		return NULL;
 
-	first = i = hash_obj(sha1,
-			     the_repository->parsed_objects->obj_hash_size);
-	while ((obj = the_repository->parsed_objects->obj_hash[i]) != NULL) {
+	first = i = hash_obj(sha1, r->parsed_objects->obj_hash_size);
+	while ((obj = r->parsed_objects->obj_hash[i]) != NULL) {
 		if (!hashcmp(sha1, obj->oid.hash))
 			break;
 		i++;
-		if (i == the_repository->parsed_objects->obj_hash_size)
+		if (i == r->parsed_objects->obj_hash_size)
 			i = 0;
 	}
 	if (obj && i != first) {
@@ -107,8 +106,8 @@ struct object *lookup_object(const unsigned char *sha1)
 		 * that we do not need to walk the hash table the next
 		 * time we look for it.
 		 */
-		SWAP(the_repository->parsed_objects->obj_hash[i],
-		     the_repository->parsed_objects->obj_hash[first]);
+		SWAP(r->parsed_objects->obj_hash[i],
+		     r->parsed_objects->obj_hash[first]);
 	}
 	return obj;
 }
@@ -158,13 +157,13 @@ void *create_object(struct repository *r, const unsigned char *sha1, void *o)
 	return obj;
 }
 
-void *object_as_type(struct object *obj, enum object_type type, int quiet)
+void *object_as_type(struct repository *r, struct object *obj, enum object_type type, int quiet)
 {
 	if (obj->type == type)
 		return obj;
 	else if (obj->type == OBJ_NONE) {
 		if (type == OBJ_COMMIT)
-			((struct commit *)obj)->index = alloc_commit_index(the_repository);
+			((struct commit *)obj)->index = alloc_commit_index(r);
 		obj->type = type;
 		return obj;
 	}
@@ -179,28 +178,28 @@ void *object_as_type(struct object *obj, enum object_type type, int quiet)
 
 struct object *lookup_unknown_object(const unsigned char *sha1)
 {
-	struct object *obj = lookup_object(sha1);
+	struct object *obj = lookup_object(the_repository, sha1);
 	if (!obj)
 		obj = create_object(the_repository, sha1,
 				    alloc_object_node(the_repository));
 	return obj;
 }
 
-struct object *parse_object_buffer(const struct object_id *oid, enum object_type type, unsigned long size, void *buffer, int *eaten_p)
+struct object *parse_object_buffer(struct repository *r, const struct object_id *oid, enum object_type type, unsigned long size, void *buffer, int *eaten_p)
 {
 	struct object *obj;
 	*eaten_p = 0;
 
 	obj = NULL;
 	if (type == OBJ_BLOB) {
-		struct blob *blob = lookup_blob(oid);
+		struct blob *blob = lookup_blob(r, oid);
 		if (blob) {
 			if (parse_blob_buffer(blob, buffer, size))
 				return NULL;
 			obj = &blob->object;
 		}
 	} else if (type == OBJ_TREE) {
-		struct tree *tree = lookup_tree(oid);
+		struct tree *tree = lookup_tree(r, oid);
 		if (tree) {
 			obj = &tree->object;
 			if (!tree->buffer)
@@ -212,20 +211,20 @@ struct object *parse_object_buffer(const struct object_id *oid, enum object_type
 			}
 		}
 	} else if (type == OBJ_COMMIT) {
-		struct commit *commit = lookup_commit(oid);
+		struct commit *commit = lookup_commit(r, oid);
 		if (commit) {
-			if (parse_commit_buffer(commit, buffer, size, 1))
+			if (parse_commit_buffer(r, commit, buffer, size, 1))
 				return NULL;
-			if (!get_cached_commit_buffer(commit, NULL)) {
-				set_commit_buffer(commit, buffer, size);
+			if (!get_cached_commit_buffer(r, commit, NULL)) {
+				set_commit_buffer(r, commit, buffer, size);
 				*eaten_p = 1;
 			}
 			obj = &commit->object;
 		}
 	} else if (type == OBJ_TAG) {
-		struct tag *tag = lookup_tag(oid);
+		struct tag *tag = lookup_tag(r, oid);
 		if (tag) {
-			if (parse_tag_buffer(tag, buffer, size))
+			if (parse_tag_buffer(r, tag, buffer, size))
 			       return NULL;
 			obj = &tag->object;
 		}
@@ -239,35 +238,35 @@ struct object *parse_object_buffer(const struct object_id *oid, enum object_type
 struct object *parse_object_or_die(const struct object_id *oid,
 				   const char *name)
 {
-	struct object *o = parse_object(oid);
+	struct object *o = parse_object(the_repository, oid);
 	if (o)
 		return o;
 
 	die(_("unable to parse object: %s"), name ? name : oid_to_hex(oid));
 }
 
-struct object *parse_object(const struct object_id *oid)
+struct object *parse_object(struct repository *r, const struct object_id *oid)
 {
 	unsigned long size;
 	enum object_type type;
 	int eaten;
-	const struct object_id *repl = lookup_replace_object(the_repository, oid);
+	const struct object_id *repl = lookup_replace_object(r, oid);
 	void *buffer;
 	struct object *obj;
 
-	obj = lookup_object(oid->hash);
+	obj = lookup_object(r, oid->hash);
 	if (obj && obj->parsed)
 		return obj;
 
 	if ((obj && obj->type == OBJ_BLOB && has_object_file(oid)) ||
 	    (!obj && has_object_file(oid) &&
-	     oid_object_info(the_repository, oid, NULL) == OBJ_BLOB)) {
+	     oid_object_info(r, oid, NULL) == OBJ_BLOB)) {
 		if (check_object_signature(repl, NULL, 0, NULL) < 0) {
 			error("sha1 mismatch %s", oid_to_hex(oid));
 			return NULL;
 		}
-		parse_blob_buffer(lookup_blob(oid), NULL, 0);
-		return lookup_object(oid->hash);
+		parse_blob_buffer(lookup_blob(r, oid), NULL, 0);
+		return lookup_object(r, oid->hash);
 	}
 
 	buffer = read_object_file(oid, &type, &size);
@@ -278,7 +277,8 @@ struct object *parse_object(const struct object_id *oid)
 			return NULL;
 		}
 
-		obj = parse_object_buffer(oid, type, size, buffer, &eaten);
+		obj = parse_object_buffer(r, oid, type, size,
+					  buffer, &eaten);
 		if (!eaten)
 			free(buffer);
 		return obj;
@@ -467,6 +467,8 @@ struct parsed_object_pool *parsed_object_pool_new(void)
 	o->is_shallow = -1;
 	o->shallow_stat = xcalloc(1, sizeof(*o->shallow_stat));
 
+	o->buffer_slab = allocate_commit_buffer_slab();
+
 	return o;
 }
 
@@ -541,6 +543,9 @@ void parsed_object_pool_clear(struct parsed_object_pool *o)
 	FREE_AND_NULL(o->obj_hash);
 	o->obj_hash_size = 0;
 
+	free_commit_buffer_slab(o->buffer_slab);
+	o->buffer_slab = NULL;
+
 	clear_alloc_state(o->blob_state);
 	clear_alloc_state(o->tree_state);
 	clear_alloc_state(o->commit_state);

object.h

@@ -1,6 +1,8 @@
 #ifndef OBJECT_H
 #define OBJECT_H
 
+struct buffer_slab;
+
 struct parsed_object_pool {
 	struct object **obj_hash;
 	int nr_objs, obj_hash_size;
@@ -22,6 +24,8 @@ struct parsed_object_pool {
 	char *alternate_shallow_file;
 
 	int commit_graft_prepared;
+
+	struct buffer_slab *buffer_slab;
 };
 
 struct parsed_object_pool *parsed_object_pool_new(void);
@@ -110,18 +114,18 @@ extern struct object *get_indexed_object(unsigned int);
  * half-initialised objects, the caller is expected to initialize them
  * by calling parse_object() on them.
  */
-struct object *lookup_object(const unsigned char *sha1);
+struct object *lookup_object(struct repository *r, const unsigned char *sha1);
 
 extern void *create_object(struct repository *r, const unsigned char *sha1, void *obj);
 
-void *object_as_type(struct object *obj, enum object_type type, int quiet);
+void *object_as_type(struct repository *r, struct object *obj, enum object_type type, int quiet);
 
 /*
  * Returns the object, having parsed it to find out what it is.
  *
  * Returns NULL if the object is missing or corrupt.
  */
-struct object *parse_object(const struct object_id *oid);
+struct object *parse_object(struct repository *r, const struct object_id *oid);
 
 /*
  * Like parse_object, but will die() instead of returning NULL. If the
@@ -134,7 +138,7 @@ struct object *parse_object_or_die(const struct object_id *oid, const char *name
  * parsing it.  eaten_p indicates if the object has a borrowed copy
  * of buffer and the caller should not free() it.
  */
-struct object *parse_object_buffer(const struct object_id *oid, enum object_type type, unsigned long size, void *buffer, int *eaten_p);
+struct object *parse_object_buffer(struct repository *r, const struct object_id *oid, enum object_type type, unsigned long size, void *buffer, int *eaten_p);
 
 /** Returns the object, with potentially excess memory allocated. **/
 struct object *lookup_unknown_object(const unsigned  char *sha1);

packfile.c

@@ -1934,7 +1934,7 @@ static int add_promisor_object(const struct object_id *oid,
 			       void *set_)
 {
 	struct oidset *set = set_;
-	struct object *obj = parse_object(oid);
+	struct object *obj = parse_object(the_repository, oid);
 	if (!obj)
 		return 1;
 

parse-options-cb.c

@@ -91,7 +91,7 @@ int parse_opt_commits(const struct option *opt, const char *arg, int unset)
 		return -1;
 	if (get_oid(arg, &oid))
 		return error("malformed object name %s", arg);
-	commit = lookup_commit_reference(&oid);
+	commit = lookup_commit_reference(the_repository, &oid);
 	if (!commit)
 		return error("no such commit %s", arg);
 	commit_list_insert(commit, opt->value);

pretty.c

@@ -630,7 +630,7 @@ const char *logmsg_reencode(const struct commit *commit,
 		 * the cached copy from get_commit_buffer, we need to duplicate it
 		 * to avoid munging the cached copy.
 		 */
-		if (msg == get_cached_commit_buffer(commit, NULL))
+		if (msg == get_cached_commit_buffer(the_repository, commit, NULL))
 			out = xstrdup(msg);
 		else
 			out = (char *)msg;
@@ -1146,7 +1146,7 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
 
 	/* these depend on the commit */
 	if (!commit->object.parsed)
-		parse_object(&commit->object.oid);
+		parse_object(the_repository, &commit->object.oid);
 
 	switch (placeholder[0]) {
 	case 'H':		/* commit hash */

reachable.c

@@ -88,10 +88,10 @@ static void add_recent_object(const struct object_id *oid,
 		obj = parse_object_or_die(oid, NULL);
 		break;
 	case OBJ_TREE:
-		obj = (struct object *)lookup_tree(oid);
+		obj = (struct object *)lookup_tree(the_repository, oid);
 		break;
 	case OBJ_BLOB:
-		obj = (struct object *)lookup_blob(oid);
+		obj = (struct object *)lookup_blob(the_repository, oid);
 		break;
 	default:
 		die("unknown object type for %s: %s",
@@ -108,7 +108,7 @@ static int add_recent_loose(const struct object_id *oid,
 			    const char *path, void *data)
 {
 	struct stat st;
-	struct object *obj = lookup_object(oid->hash);
+	struct object *obj = lookup_object(the_repository, oid->hash);
 
 	if (obj && obj->flags & SEEN)
 		return 0;
@@ -133,7 +133,7 @@ static int add_recent_packed(const struct object_id *oid,
 			     struct packed_git *p, uint32_t pos,
 			     void *data)
 {
-	struct object *obj = lookup_object(oid->hash);
+	struct object *obj = lookup_object(the_repository, oid->hash);
 
 	if (obj && obj->flags & SEEN)
 		return 0;

ref-filter.c

@@ -4,6 +4,7 @@
 #include "refs.h"
 #include "wildmatch.h"
 #include "object-store.h"
+#include "repository.h"
 #include "commit.h"
 #include "remote.h"
 #include "color.h"
@@ -806,7 +807,8 @@ static void *get_obj(const struct object_id *oid, struct object **obj, unsigned
 	void *buf = read_object_file(oid, &type, sz);
 
 	if (buf)
-		*obj = parse_object_buffer(oid, type, *sz, buf, eaten);
+		*obj = parse_object_buffer(the_repository, oid, type, *sz,
+					   buf, eaten);
 	else
 		*obj = NULL;
 	return buf;
@@ -1923,7 +1925,7 @@ static const struct object_id *match_points_at(struct oid_array *points_at,
 
 	if (oid_array_lookup(points_at, oid) >= 0)
 		return oid;
-	obj = parse_object(oid);
+	obj = parse_object(the_repository, oid);
 	if (!obj)
 		die(_("malformed object at '%s'"), refname);
 	if (obj->type == OBJ_TAG)
@@ -2033,7 +2035,8 @@ static int ref_filter_handler(const char *refname, const struct object_id *oid,
 	 * non-commits early. The actual filtering is done later.
 	 */
 	if (filter->merge_commit || filter->with_commit || filter->no_commit || filter->verbose) {
-		commit = lookup_commit_reference_gently(oid, 1);
+		commit = lookup_commit_reference_gently(the_repository, oid,
+							1);
 		if (!commit)
 			return 0;
 		/* We perform the filtering for the '--contains' option... */
@@ -2390,7 +2393,8 @@ int parse_opt_merge_filter(const struct option *opt, const char *arg, int unset)
 	if (get_oid(arg, &oid))
 		die(_("malformed object name %s"), arg);
 
-	rf->merge_commit = lookup_commit_reference_gently(&oid, 0);
+	rf->merge_commit = lookup_commit_reference_gently(the_repository,
+							  &oid, 0);
 	if (!rf->merge_commit)
 		return opterror(opt, "must point to a commit", 0);
 

reflog-walk.c

@@ -305,7 +305,8 @@ static struct commit *next_reflog_commit(struct commit_reflog *log)
 {
 	for (; log->recno >= 0; log->recno--) {
 		struct reflog_info *entry = &log->reflogs->items[log->recno];
-		struct object *obj = parse_object(&entry->noid);
+		struct object *obj = parse_object(the_repository,
+						  &entry->noid);
 
 		if (obj && obj->type == OBJ_COMMIT)
 			return (struct commit *)obj;

refs.c

@@ -305,7 +305,7 @@ enum peel_status peel_object(const struct object_id *name, struct object_id *oid
 
 	if (o->type == OBJ_NONE) {
 		int type = oid_object_info(the_repository, name, NULL);
-		if (type < 0 || !object_as_type(o, type, 0))
+		if (type < 0 || !object_as_type(the_repository, o, type, 0))
 			return PEEL_INVALID;
 	}
 

refs/files-backend.c

@@ -1651,7 +1651,7 @@ static int write_ref_to_lockfile(struct ref_lock *lock,
 	struct object *o;
 	int fd;
 
-	o = parse_object(oid);
+	o = parse_object(the_repository, oid);
 	if (!o) {
 		strbuf_addf(err,
 			    "trying to write ref '%s' with nonexistent object %s",

remote.c

@@ -1149,7 +1149,7 @@ static void add_to_tips(struct tips *tips, const struct object_id *oid)
 
 	if (is_null_oid(oid))
 		return;
-	commit = lookup_commit_reference_gently(oid, 1);
+	commit = lookup_commit_reference_gently(the_repository, oid, 1);
 	if (!commit || (commit->object.flags & TMP_MARK))
 		return;
 	commit->object.flags |= TMP_MARK;
@@ -1211,7 +1211,8 @@ static void add_missing_tags(struct ref *src, struct ref **dst, struct ref ***ds
 
 			if (is_null_oid(&ref->new_oid))
 				continue;
-			commit = lookup_commit_reference_gently(&ref->new_oid,
+			commit = lookup_commit_reference_gently(the_repository,
+								&ref->new_oid,
 								1);
 			if (!commit)
 				/* not pushing a commit, which is not an error */
@@ -1435,8 +1436,8 @@ void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
 				reject_reason = REF_STATUS_REJECT_ALREADY_EXISTS;
 			else if (!has_object_file(&ref->old_oid))
 				reject_reason = REF_STATUS_REJECT_FETCH_FIRST;
-			else if (!lookup_commit_reference_gently(&ref->old_oid, 1) ||
-				 !lookup_commit_reference_gently(&ref->new_oid, 1))
+			else if (!lookup_commit_reference_gently(the_repository, &ref->old_oid, 1) ||
+				 !lookup_commit_reference_gently(the_repository, &ref->new_oid, 1))
 				reject_reason = REF_STATUS_REJECT_NEEDS_FORCE;
 			else if (!ref_newer(&ref->new_oid, &ref->old_oid))
 				reject_reason = REF_STATUS_REJECT_NONFASTFORWARD;
@@ -1802,12 +1803,14 @@ int ref_newer(const struct object_id *new_oid, const struct object_id *old_oid)
 	 * Both new_commit and old_commit must be commit-ish and new_commit is descendant of
 	 * old_commit.  Otherwise we require --force.
 	 */
-	o = deref_tag(parse_object(old_oid), NULL, 0);
+	o = deref_tag(the_repository, parse_object(the_repository, old_oid),
+		      NULL, 0);
 	if (!o || o->type != OBJ_COMMIT)
 		return 0;
 	old_commit = (struct commit *) o;
 
-	o = deref_tag(parse_object(new_oid), NULL, 0);
+	o = deref_tag(the_repository, parse_object(the_repository, new_oid),
+		      NULL, 0);
 	if (!o || o->type != OBJ_COMMIT)
 		return 0;
 	new_commit = (struct commit *) o;
@@ -1865,13 +1868,13 @@ int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
 	/* Cannot stat if what we used to build on no longer exists */
 	if (read_ref(base, &oid))
 		return -1;
-	theirs = lookup_commit_reference(&oid);
+	theirs = lookup_commit_reference(the_repository, &oid);
 	if (!theirs)
 		return -1;
 
 	if (read_ref(branch->refname, &oid))
 		return -1;
-	ours = lookup_commit_reference(&oid);
+	ours = lookup_commit_reference(the_repository, &oid);
 	if (!ours)
 		return -1;
 

revision.c

@@ -63,10 +63,10 @@ static void mark_tree_contents_uninteresting(struct tree *tree)
 	while (tree_entry(&desc, &entry)) {
 		switch (object_type(entry.mode)) {
 		case OBJ_TREE:
-			mark_tree_uninteresting(lookup_tree(entry.oid));
+			mark_tree_uninteresting(lookup_tree(the_repository, entry.oid));
 			break;
 		case OBJ_BLOB:
-			mark_blob_uninteresting(lookup_blob(entry.oid));
+			mark_blob_uninteresting(lookup_blob(the_repository, entry.oid));
 			break;
 		default:
 			/* Subproject commit - not in this repository */
@@ -198,7 +198,7 @@ void add_head_to_pending(struct rev_info *revs)
 	struct object *obj;
 	if (get_oid("HEAD", &oid))
 		return;
-	obj = parse_object(&oid);
+	obj = parse_object(the_repository, &oid);
 	if (!obj)
 		return;
 	add_pending_object(revs, obj, "HEAD");
@@ -210,7 +210,7 @@ static struct object *get_reference(struct rev_info *revs, const char *name,
 {
 	struct object *object;
 
-	object = parse_object(oid);
+	object = parse_object(the_repository, oid);
 	if (!object) {
 		if (revs->ignore_missing)
 			return object;
@@ -247,7 +247,7 @@ static struct commit *handle_commit(struct rev_info *revs,
 			add_pending_object(revs, object, tag->tag);
 		if (!tag->tagged)
 			die("bad tag");
-		object = parse_object(&tag->tagged->oid);
+		object = parse_object(the_repository, &tag->tagged->oid);
 		if (!object) {
 			if (revs->ignore_missing_links || (flags & UNINTERESTING))
 				return NULL;
@@ -1250,7 +1250,7 @@ static void handle_one_reflog_commit(struct object_id *oid, void *cb_data)
 {
 	struct all_refs_cb *cb = cb_data;
 	if (!is_null_oid(oid)) {
-		struct object *o = parse_object(oid);
+		struct object *o = parse_object(the_repository, oid);
 		if (o) {
 			o->flags |= cb->all_flags;
 			/* ??? CMDLINEFLAGS ??? */
@@ -1323,7 +1323,7 @@ static void add_cache_tree(struct cache_tree *it, struct rev_info *revs,
 	int i;
 
 	if (it->entry_count >= 0) {
-		struct tree *tree = lookup_tree(&it->oid);
+		struct tree *tree = lookup_tree(the_repository, &it->oid);
 		add_pending_object_with_path(revs, &tree->object, "",
 					     040000, path->buf);
 	}
@@ -1349,7 +1349,7 @@ static void do_add_index_objects_to_pending(struct rev_info *revs,
 		if (S_ISGITLINK(ce->ce_mode))
 			continue;
 
-		blob = lookup_blob(&ce->oid);
+		blob = lookup_blob(the_repository, &ce->oid);
 		if (!blob)
 			die("unable to add index blob to traversal");
 		add_pending_object_with_path(revs, &blob->object, "",
@@ -1578,8 +1578,8 @@ static int handle_dotdot_1(const char *arg, char *dotdot,
 		*dotdot = '\0';
 	}
 
-	a_obj = parse_object(&a_oid);
-	b_obj = parse_object(&b_oid);
+	a_obj = parse_object(the_repository, &a_oid);
+	b_obj = parse_object(the_repository, &b_oid);
 	if (!a_obj || !b_obj)
 		return dotdot_missing(arg, dotdot, revs, symmetric);
 
@@ -1592,8 +1592,8 @@ static int handle_dotdot_1(const char *arg, char *dotdot,
 		struct commit *a, *b;
 		struct commit_list *exclude;
 
-		a = lookup_commit_reference(&a_obj->oid);
-		b = lookup_commit_reference(&b_obj->oid);
+		a = lookup_commit_reference(the_repository, &a_obj->oid);
+		b = lookup_commit_reference(the_repository, &b_obj->oid);
 		if (!a || !b)
 			return dotdot_missing(arg, dotdot, revs, symmetric);
 
@@ -2884,7 +2884,7 @@ static int mark_uninteresting(const struct object_id *oid,
 			      uint32_t pos,
 			      void *unused)
 {
-	struct object *o = parse_object(oid);
+	struct object *o = parse_object(the_repository, oid);
 	o->flags |= UNINTERESTING | SEEN;
 	return 0;
 }

sequencer.c

@@ -433,7 +433,7 @@ static int read_oneliner(struct strbuf *buf,
 
 static struct tree *empty_tree(void)
 {
-	return lookup_tree(the_hash_algo->empty_tree);
+	return lookup_tree(the_repository, the_repository->hash_algo->empty_tree);
 }
 
 static int error_dirty_index(struct replay_opts *opts)
@@ -594,7 +594,7 @@ static int is_index_unchanged(void)
 	if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, &head_oid, NULL))
 		return error(_("could not resolve HEAD commit"));
 
-	head_commit = lookup_commit(&head_oid);
+	head_commit = lookup_commit(the_repository, &head_oid);
 
 	/*
 	 * If head_commit is NULL, check_commit, called from
@@ -1101,7 +1101,7 @@ void print_commit_summary(const char *prefix, const struct object_id *oid,
 	struct strbuf author_ident = STRBUF_INIT;
 	struct strbuf committer_ident = STRBUF_INIT;
 
-	commit = lookup_commit(oid);
+	commit = lookup_commit(the_repository, oid);
 	if (!commit)
 		die(_("couldn't look up newly created commit"));
 	if (parse_commit(commit))
@@ -1176,7 +1176,7 @@ static int parse_head(struct commit **head)
 	if (get_oid("HEAD", &oid)) {
 		current_head = NULL;
 	} else {
-		current_head = lookup_commit_reference(&oid);
+		current_head = lookup_commit_reference(the_repository, &oid);
 		if (!current_head)
 			return error(_("could not parse HEAD"));
 		if (oidcmp(&oid, &current_head->object.oid)) {
@@ -1511,7 +1511,7 @@ static int update_squash_messages(enum todo_command command,
 
 		if (get_oid("HEAD", &head))
 			return error(_("need a HEAD to fixup"));
-		if (!(head_commit = lookup_commit_reference(&head)))
+		if (!(head_commit = lookup_commit_reference(the_repository, &head)))
 			return error(_("could not read HEAD"));
 		if (!(head_message = get_commit_buffer(head_commit, NULL)))
 			return error(_("could not read HEAD's commit message"));
@@ -2007,7 +2007,7 @@ static int parse_insn_line(struct todo_item *item, const char *bol, char *eol)
 	if (status < 0)
 		return -1;
 
-	item->commit = lookup_commit_reference(&commit_oid);
+	item->commit = lookup_commit_reference(the_repository, &commit_oid);
 	return !item->commit;
 }
 
@@ -3634,7 +3634,7 @@ int sequencer_pick_revisions(struct replay_opts *opts)
 			continue;
 
 		if (!get_oid(name, &oid)) {
-			if (!lookup_commit_reference_gently(&oid, 1)) {
+			if (!lookup_commit_reference_gently(the_repository, &oid, 1)) {
 				enum object_type type = oid_object_info(the_repository,
 									&oid,
 									NULL);

server-info.c

@@ -56,7 +56,7 @@ static int add_info_ref(const char *path, const struct object_id *oid,
 			int flag, void *cb_data)
 {
 	FILE *fp = cb_data;
-	struct object *o = parse_object(oid);
+	struct object *o = parse_object(the_repository, oid);
 	if (!o)
 		return -1;
 
@@ -64,7 +64,7 @@ static int add_info_ref(const char *path, const struct object_id *oid,
 		return -1;
 
 	if (o->type == OBJ_TAG) {
-		o = deref_tag(o, path, 0);
+		o = deref_tag(the_repository, o, path, 0);
 		if (o)
 			if (fprintf(fp, "%s	%s^{}\n",
 				oid_to_hex(&o->oid), path) < 0)

sha1-file.c

@@ -1801,7 +1801,7 @@ static void check_commit(const void *buf, size_t size)
 {
 	struct commit c;
 	memset(&c, 0, sizeof(c));
-	if (parse_commit_buffer(&c, buf, size, 0))
+	if (parse_commit_buffer(the_repository, &c, buf, size, 0))
 		die("corrupt commit");
 }
 
@@ -1809,7 +1809,7 @@ static void check_tag(const void *buf, size_t size)
 {
 	struct tag t;
 	memset(&t, 0, sizeof(t));
-	if (parse_tag_buffer(&t, buf, size))
+	if (parse_tag_buffer(the_repository, &t, buf, size))
 		die("corrupt tag");
 }
 

sha1-name.c

@@ -239,7 +239,8 @@ static int disambiguate_committish_only(const struct object_id *oid, void *cb_da
 		return 0;
 
 	/* We need to do this the hard way... */
-	obj = deref_tag(parse_object(oid), NULL, 0);
+	obj = deref_tag(the_repository, parse_object(the_repository, oid),
+			NULL, 0);
 	if (obj && obj->type == OBJ_COMMIT)
 		return 1;
 	return 0;
@@ -263,7 +264,8 @@ static int disambiguate_treeish_only(const struct object_id *oid, void *cb_data_
 		return 0;
 
 	/* We need to do this the hard way... */
-	obj = deref_tag(parse_object(oid), NULL, 0);
+	obj = deref_tag(the_repository, parse_object(the_repository, oid),
+			NULL, 0);
 	if (obj && (obj->type == OBJ_TREE || obj->type == OBJ_COMMIT))
 		return 1;
 	return 0;
@@ -351,14 +353,14 @@ static int show_ambiguous_object(const struct object_id *oid, void *data)
 
 	type = oid_object_info(the_repository, oid, NULL);
 	if (type == OBJ_COMMIT) {
-		struct commit *commit = lookup_commit(oid);
+		struct commit *commit = lookup_commit(the_repository, oid);
 		if (commit) {
 			struct pretty_print_context pp = {0};
 			pp.date_mode.type = DATE_SHORT;
 			format_commit_message(commit, " %ad - %s", &desc, &pp);
 		}
 	} else if (type == OBJ_TAG) {
-		struct tag *tag = lookup_tag(oid);
+		struct tag *tag = lookup_tag(the_repository, oid);
 		if (!parse_tag(tag) && tag->tag)
 			strbuf_addf(&desc, " %s", tag->tag);
 	}
@@ -846,7 +848,7 @@ static int get_parent(const char *name, int len,
 
 	if (ret)
 		return ret;
-	commit = lookup_commit_reference(&oid);
+	commit = lookup_commit_reference(the_repository, &oid);
 	if (parse_commit(commit))
 		return -1;
 	if (!idx) {
@@ -874,7 +876,7 @@ static int get_nth_ancestor(const char *name, int len,
 	ret = get_oid_1(name, len, &oid, GET_OID_COMMITTISH);
 	if (ret)
 		return ret;
-	commit = lookup_commit_reference(&oid);
+	commit = lookup_commit_reference(the_repository, &oid);
 	if (!commit)
 		return -1;
 
@@ -893,7 +895,7 @@ struct object *peel_to_type(const char *name, int namelen,
 	if (name && !namelen)
 		namelen = strlen(name);
 	while (1) {
-		if (!o || (!o->parsed && !parse_object(&o->oid)))
+		if (!o || (!o->parsed && !parse_object(the_repository, &o->oid)))
 			return NULL;
 		if (expected_type == OBJ_ANY || o->type == expected_type)
 			return o;
@@ -966,12 +968,12 @@ static int peel_onion(const char *name, int len, struct object_id *oid,
 	if (get_oid_1(name, sp - name - 2, &outer, lookup_flags))
 		return -1;
 
-	o = parse_object(&outer);
+	o = parse_object(the_repository, &outer);
 	if (!o)
 		return -1;
 	if (!expected_type) {
-		o = deref_tag(o, name, sp - name - 2);
-		if (!o || (!o->parsed && !parse_object(&o->oid)))
+		o = deref_tag(the_repository, o, name, sp - name - 2);
+		if (!o || (!o->parsed && !parse_object(the_repository, &o->oid)))
 			return -1;
 		oidcpy(oid, &o->oid);
 		return 0;
@@ -1098,11 +1100,12 @@ static int handle_one_ref(const char *path, const struct object_id *oid,
 			  int flag, void *cb_data)
 {
 	struct commit_list **list = cb_data;
-	struct object *object = parse_object(oid);
+	struct object *object = parse_object(the_repository, oid);
 	if (!object)
 		return 0;
 	if (object->type == OBJ_TAG) {
-		object = deref_tag(object, path, strlen(path));
+		object = deref_tag(the_repository, object, path,
+				   strlen(path));
 		if (!object)
 			return 0;
 	}
@@ -1144,7 +1147,7 @@ static int get_oid_oneline(const char *prefix, struct object_id *oid,
 		int matches;
 
 		commit = pop_most_recent_commit(&list, ONELINE_SEEN);
-		if (!parse_object(&commit->object.oid))
+		if (!parse_object(the_repository, &commit->object.oid))
 			continue;
 		buf = get_commit_buffer(commit, NULL);
 		p = strstr(buf, "\n\n");
@@ -1253,13 +1256,13 @@ int get_oid_mb(const char *name, struct object_id *oid)
 	}
 	if (st)
 		return st;
-	one = lookup_commit_reference_gently(&oid_tmp, 0);
+	one = lookup_commit_reference_gently(the_repository, &oid_tmp, 0);
 	if (!one)
 		return -1;
 
 	if (get_oid_committish(dots[3] ? (dots + 3) : "HEAD", &oid_tmp))
 		return -1;
-	two = lookup_commit_reference_gently(&oid_tmp, 0);
+	two = lookup_commit_reference_gently(the_repository, &oid_tmp, 0);
 	if (!two)
 		return -1;
 	mbs = get_merge_bases(one, two);

shallow.c

@@ -31,7 +31,7 @@ int register_shallow(struct repository *r, const struct object_id *oid)
 {
 	struct commit_graft *graft =
 		xmalloc(sizeof(struct commit_graft));
-	struct commit *commit = lookup_commit(oid);
+	struct commit *commit = lookup_commit(the_repository, oid);
 
 	oidcpy(&graft->oid, oid);
 	graft->nr_parent = -1;
@@ -96,7 +96,9 @@ struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
 			if (i < heads->nr) {
 				int **depth_slot;
 				commit = (struct commit *)
-					deref_tag(heads->objects[i++].item, NULL, 0);
+					deref_tag(the_repository,
+						  heads->objects[i++].item,
+						  NULL, 0);
 				if (!commit || commit->object.type != OBJ_COMMIT) {
 					commit = NULL;
 					continue;
@@ -259,7 +261,7 @@ static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
 	if (graft->nr_parent != -1)
 		return 0;
 	if (data->flags & SEEN_ONLY) {
-		struct commit *c = lookup_commit(&graft->oid);
+		struct commit *c = lookup_commit(the_repository, &graft->oid);
 		if (!c || !(c->object.flags & SEEN)) {
 			if (data->flags & VERBOSE)
 				printf("Removing %s from .git/shallow\n",
@@ -492,7 +494,8 @@ static void paint_down(struct paint_info *info, const struct object_id *oid,
 	struct commit_list *head = NULL;
 	int bitmap_nr = DIV_ROUND_UP(info->nr_bits, 32);
 	size_t bitmap_size = st_mult(sizeof(uint32_t), bitmap_nr);
-	struct commit *c = lookup_commit_reference_gently(oid, 1);
+	struct commit *c = lookup_commit_reference_gently(the_repository, oid,
+							  1);
 	uint32_t *tmp; /* to be freed before return */
 	uint32_t *bitmap;
 
@@ -554,7 +557,8 @@ static void paint_down(struct paint_info *info, const struct object_id *oid,
 static int mark_uninteresting(const char *refname, const struct object_id *oid,
 			      int flags, void *cb_data)
 {
-	struct commit *commit = lookup_commit_reference_gently(oid, 1);
+	struct commit *commit = lookup_commit_reference_gently(the_repository,
+							       oid, 1);
 	if (!commit)
 		return 0;
 	commit->object.flags |= UNINTERESTING;
@@ -622,7 +626,8 @@ void assign_shallow_commits_to_refs(struct shallow_info *info,
 
 	/* Mark potential bottoms so we won't go out of bound */
 	for (i = 0; i < nr_shallow; i++) {
-		struct commit *c = lookup_commit(&oid[shallow[i]]);
+		struct commit *c = lookup_commit(the_repository,
+						 &oid[shallow[i]]);
 		c->object.flags |= BOTTOM;
 	}
 
@@ -633,7 +638,8 @@ void assign_shallow_commits_to_refs(struct shallow_info *info,
 		int bitmap_size = DIV_ROUND_UP(pi.nr_bits, 32) * sizeof(uint32_t);
 		memset(used, 0, sizeof(*used) * info->shallow->nr);
 		for (i = 0; i < nr_shallow; i++) {
-			const struct commit *c = lookup_commit(&oid[shallow[i]]);
+			const struct commit *c = lookup_commit(the_repository,
+							       &oid[shallow[i]]);
 			uint32_t **map = ref_bitmap_at(&pi.ref_bitmap, c);
 			if (*map)
 				used[shallow[i]] = xmemdupz(*map, bitmap_size);
@@ -664,7 +670,8 @@ static int add_ref(const char *refname, const struct object_id *oid,
 {
 	struct commit_array *ca = cb_data;
 	ALLOC_GROW(ca->commits, ca->nr + 1, ca->alloc);
-	ca->commits[ca->nr] = lookup_commit_reference_gently(oid, 1);
+	ca->commits[ca->nr] = lookup_commit_reference_gently(the_repository,
+							     oid, 1);
 	if (ca->commits[ca->nr])
 		ca->nr++;
 	return 0;
@@ -702,7 +709,7 @@ static void post_assign_shallow(struct shallow_info *info,
 	for (i = dst = 0; i < info->nr_theirs; i++) {
 		if (i != dst)
 			info->theirs[dst] = info->theirs[i];
-		c = lookup_commit(&oid[info->theirs[i]]);
+		c = lookup_commit(the_repository, &oid[info->theirs[i]]);
 		bitmap = ref_bitmap_at(ref_bitmap, c);
 		if (!*bitmap)
 			continue;
@@ -723,7 +730,7 @@ static void post_assign_shallow(struct shallow_info *info,
 	for (i = dst = 0; i < info->nr_ours; i++) {
 		if (i != dst)
 			info->ours[dst] = info->ours[i];
-		c = lookup_commit(&oid[info->ours[i]]);
+		c = lookup_commit(the_repository, &oid[info->ours[i]]);
 		bitmap = ref_bitmap_at(ref_bitmap, c);
 		if (!*bitmap)
 			continue;
@@ -745,7 +752,8 @@ static void post_assign_shallow(struct shallow_info *info,
 int delayed_reachability_test(struct shallow_info *si, int c)
 {
 	if (si->need_reachability_test[c]) {
-		struct commit *commit = lookup_commit(&si->shallow->oid[c]);
+		struct commit *commit = lookup_commit(the_repository,
+						      &si->shallow->oid[c]);
 
 		if (!si->commits) {
 			struct commit_array ca;

submodule.c

@@ -517,8 +517,8 @@ static void show_submodule_header(struct diff_options *o, const char *path,
 	 * Attempt to lookup the commit references, and determine if this is
 	 * a fast forward or fast backwards update.
 	 */
-	*left = lookup_commit_reference(one);
-	*right = lookup_commit_reference(two);
+	*left = lookup_commit_reference(the_repository, one);
+	*right = lookup_commit_reference(the_repository, two);
 
 	/*
 	 * Warn about missing commits in the submodule project, but only if

tag.c

@@ -64,11 +64,11 @@ int gpg_verify_tag(const struct object_id *oid, const char *name_to_report,
 	return ret;
 }
 
-struct object *deref_tag(struct object *o, const char *warn, int warnlen)
+struct object *deref_tag(struct repository *r, struct object *o, const char *warn, int warnlen)
 {
 	while (o && o->type == OBJ_TAG)
 		if (((struct tag *)o)->tagged)
-			o = parse_object(&((struct tag *)o)->tagged->oid);
+			o = parse_object(r, &((struct tag *)o)->tagged->oid);
 		else
 			o = NULL;
 	if (!o && warn) {
@@ -82,7 +82,7 @@ struct object *deref_tag(struct object *o, const char *warn, int warnlen)
 struct object *deref_tag_noverify(struct object *o)
 {
 	while (o && o->type == OBJ_TAG) {
-		o = parse_object(&o->oid);
+		o = parse_object(the_repository, &o->oid);
 		if (o && o->type == OBJ_TAG && ((struct tag *)o)->tagged)
 			o = ((struct tag *)o)->tagged;
 		else
@@ -91,13 +91,13 @@ struct object *deref_tag_noverify(struct object *o)
 	return o;
 }
 
-struct tag *lookup_tag(const struct object_id *oid)
+struct tag *lookup_tag(struct repository *r, const struct object_id *oid)
 {
-	struct object *obj = lookup_object(oid->hash);
+	struct object *obj = lookup_object(r, oid->hash);
 	if (!obj)
-		return create_object(the_repository, oid->hash,
-				     alloc_tag_node(the_repository));
-	return object_as_type(obj, OBJ_TAG, 0);
+		return create_object(r, oid->hash,
+				     alloc_tag_node(r));
+	return object_as_type(r, obj, OBJ_TAG, 0);
 }
 
 static timestamp_t parse_tag_date(const char *buf, const char *tail)
@@ -125,7 +125,7 @@ void release_tag_memory(struct tag *t)
 	t->date = 0;
 }
 
-int parse_tag_buffer(struct tag *item, const void *data, unsigned long size)
+int parse_tag_buffer(struct repository *r, struct tag *item, const void *data, unsigned long size)
 {
 	struct object_id oid;
 	char type[20];
@@ -153,13 +153,13 @@ int parse_tag_buffer(struct tag *item, const void *data, unsigned long size)
 	bufptr = nl + 1;
 
 	if (!strcmp(type, blob_type)) {
-		item->tagged = (struct object *)lookup_blob(&oid);
+		item->tagged = (struct object *)lookup_blob(r, &oid);
 	} else if (!strcmp(type, tree_type)) {
-		item->tagged = (struct object *)lookup_tree(&oid);
+		item->tagged = (struct object *)lookup_tree(r, &oid);
 	} else if (!strcmp(type, commit_type)) {
-		item->tagged = (struct object *)lookup_commit(&oid);
+		item->tagged = (struct object *)lookup_commit(r, &oid);
 	} else if (!strcmp(type, tag_type)) {
-		item->tagged = (struct object *)lookup_tag(&oid);
+		item->tagged = (struct object *)lookup_tag(r, &oid);
 	} else {
 		error("Unknown type %s", type);
 		item->tagged = NULL;
@@ -202,7 +202,7 @@ int parse_tag(struct tag *item)
 		return error("Object %s not a tag",
 			     oid_to_hex(&item->object.oid));
 	}
-	ret = parse_tag_buffer(item, data, size);
+	ret = parse_tag_buffer(the_repository, item, data, size);
 	free(data);
 	return ret;
 }

tag.h

@@ -11,12 +11,11 @@ struct tag {
 	char *tag;
 	timestamp_t date;
 };
-
-extern struct tag *lookup_tag(const struct object_id *oid);
-extern int parse_tag_buffer(struct tag *item, const void *data, unsigned long size);
+extern struct tag *lookup_tag(struct repository *r, const struct object_id *oid);
+extern int parse_tag_buffer(struct repository *r, struct tag *item, const void *data, unsigned long size);
 extern int parse_tag(struct tag *item);
 extern void release_tag_memory(struct tag *t);
-extern struct object *deref_tag(struct object *, const char *, int);
+extern struct object *deref_tag(struct repository *r, struct object *, const char *, int);
 extern struct object *deref_tag_noverify(struct object *);
 extern int gpg_verify_tag(const struct object_id *oid,
 		const char *name_to_report, unsigned flags);

tree.c

@@ -8,6 +8,7 @@
 #include "tag.h"
 #include "alloc.h"
 #include "tree-walk.h"
+#include "repository.h"
 
 const char *tree_type = "tree";
 
@@ -100,7 +101,7 @@ static int read_tree_1(struct tree *tree, struct strbuf *base,
 		else if (S_ISGITLINK(entry.mode)) {
 			struct commit *commit;
 
-			commit = lookup_commit(entry.oid);
+			commit = lookup_commit(the_repository, entry.oid);
 			if (!commit)
 				die("Commit %s in submodule path %s%s not found",
 				    oid_to_hex(entry.oid),
@@ -119,7 +120,7 @@ static int read_tree_1(struct tree *tree, struct strbuf *base,
 		len = tree_entry_len(&entry);
 		strbuf_add(base, entry.path, len);
 		strbuf_addch(base, '/');
-		retval = read_tree_1(lookup_tree(&oid),
+		retval = read_tree_1(lookup_tree(the_repository, &oid),
 				     base, stage, pathspec,
 				     fn, context);
 		strbuf_setlen(base, oldlen);
@@ -194,13 +195,13 @@ int read_tree(struct tree *tree, int stage, struct pathspec *match,
 	return 0;
 }
 
-struct tree *lookup_tree(const struct object_id *oid)
+struct tree *lookup_tree(struct repository *r, const struct object_id *oid)
 {
-	struct object *obj = lookup_object(oid->hash);
+	struct object *obj = lookup_object(r, oid->hash);
 	if (!obj)
-		return create_object(the_repository, oid->hash,
-				     alloc_tree_node(the_repository));
-	return object_as_type(obj, OBJ_TREE, 0);
+		return create_object(r, oid->hash,
+				     alloc_tree_node(r));
+	return object_as_type(r, obj, OBJ_TREE, 0);
 }
 
 int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size)
@@ -244,7 +245,7 @@ void free_tree_buffer(struct tree *tree)
 
 struct tree *parse_tree_indirect(const struct object_id *oid)
 {
-	struct object *obj = parse_object(oid);
+	struct object *obj = parse_object(the_repository, oid);
 	do {
 		if (!obj)
 			return NULL;
@@ -257,6 +258,6 @@ struct tree *parse_tree_indirect(const struct object_id *oid)
 		else
 			return NULL;
 		if (!obj->parsed)
-			parse_object(&obj->oid);
+			parse_object(the_repository, &obj->oid);
 	} while (1);
 }

tree.h

@@ -12,7 +12,7 @@ struct tree {
 	unsigned long size;
 };
 
-struct tree *lookup_tree(const struct object_id *oid);
+struct tree *lookup_tree(struct repository *r, const struct object_id *oid);
 
 int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size);
 

upload-pack.c

@@ -3,6 +3,7 @@
 #include "refs.h"
 #include "pkt-line.h"
 #include "sideband.h"
+#include "repository.h"
 #include "object-store.h"
 #include "tag.h"
 #include "object.h"
@@ -312,7 +313,7 @@ static int got_oid(const char *hex, struct object_id *oid)
 	if (!has_object_file(oid))
 		return -1;
 
-	o = parse_object(oid);
+	o = parse_object(the_repository, oid);
 	if (!o)
 		die("oops (%s)", oid_to_hex(oid));
 	if (o->type == OBJ_COMMIT) {
@@ -350,7 +351,7 @@ static int reachable(struct commit *want)
 			break;
 		}
 		if (!commit->object.parsed)
-			parse_object(&commit->object.oid);
+			parse_object(the_repository, &commit->object.oid);
 		if (commit->object.flags & REACHABLE)
 			continue;
 		commit->object.flags |= REACHABLE;
@@ -380,7 +381,7 @@ static int ok_to_give_up(void)
 
 		if (want->flags & COMMON_KNOWN)
 			continue;
-		want = deref_tag(want, "a want line", 0);
+		want = deref_tag(the_repository, want, "a want line", 0);
 		if (!want || want->type != OBJ_COMMIT) {
 			/* no way to tell if this is reachable by
 			 * looking at the ancestry chain alone, so
@@ -570,7 +571,7 @@ static int get_reachable_list(struct object_array *src,
 		if (parse_oid_hex(namebuf, &sha1, &p) || *p != '\n')
 			break;
 
-		o = lookup_object(sha1.hash);
+		o = lookup_object(the_repository, sha1.hash);
 		if (o && o->type == OBJ_COMMIT) {
 			o->flags &= ~TMP_MARK;
 		}
@@ -801,7 +802,7 @@ static int process_shallow(const char *line, struct object_array *shallows)
 		struct object *object;
 		if (get_oid_hex(arg, &oid))
 			die("invalid shallow line: %s", line);
-		object = parse_object(&oid);
+		object = parse_object(the_repository, &oid);
 		if (!object)
 			return 1;
 		if (object->type != OBJ_COMMIT)
@@ -927,7 +928,7 @@ static void receive_needs(void)
 		if (allow_filter && parse_feature_request(features, "filter"))
 			filter_capability_requested = 1;
 
-		o = parse_object(&oid_buf);
+		o = parse_object(the_repository, &oid_buf);
 		if (!o) {
 			packet_write_fmt(1,
 					 "ERR upload-pack: not our ref %s",
@@ -1174,7 +1175,7 @@ static int parse_want(const char *line)
 			die("git upload-pack: protocol error, "
 			    "expected to get oid, not '%s'", line);
 
-		o = parse_object(&oid);
+		o = parse_object(the_repository, &oid);
 		if (!o) {
 			packet_write_fmt(1,
 					 "ERR upload-pack: not our ref %s",
@@ -1316,7 +1317,7 @@ static int process_haves(struct oid_array *haves, struct oid_array *common)
 
 		oid_array_append(common, oid);
 
-		o = parse_object(oid);
+		o = parse_object(the_repository, oid);
 		if (!o)
 			die("oops (%s)", oid_to_hex(oid));
 		if (o->type == OBJ_COMMIT) {

walker.c

@@ -1,5 +1,6 @@
 #include "cache.h"
 #include "walker.h"
+#include "repository.h"
 #include "object-store.h"
 #include "commit.h"
 #include "tree.h"
@@ -48,12 +49,14 @@ static int process_tree(struct walker *walker, struct tree *tree)
 		if (S_ISGITLINK(entry.mode))
 			continue;
 		if (S_ISDIR(entry.mode)) {
-			struct tree *tree = lookup_tree(entry.oid);
+			struct tree *tree = lookup_tree(the_repository,
+							entry.oid);
 			if (tree)
 				obj = &tree->object;
 		}
 		else {
-			struct blob *blob = lookup_blob(entry.oid);
+			struct blob *blob = lookup_blob(the_repository,
+							entry.oid);
 			if (blob)
 				obj = &blob->object;
 		}
@@ -178,7 +181,7 @@ static int loop(struct walker *walker)
 			}
 		}
 		if (!obj->type)
-			parse_object(&obj->oid);
+			parse_object(the_repository, &obj->oid);
 		if (process_object(walker, obj))
 			return -1;
 	}
@@ -204,7 +207,8 @@ static int interpret_target(struct walker *walker, char *target, struct object_i
 static int mark_complete(const char *path, const struct object_id *oid,
 			 int flag, void *cb_data)
 {
-	struct commit *commit = lookup_commit_reference_gently(oid, 1);
+	struct commit *commit = lookup_commit_reference_gently(the_repository,
+							       oid, 1);
 
 	if (commit) {
 		commit->object.flags |= COMPLETE;

wt-status.c

@@ -1489,7 +1489,7 @@ static void wt_status_get_detached_from(struct wt_status_state *state)
 	    /* sha1 is a commit? match without further lookup */
 	    (!oidcmp(&cb.noid, &oid) ||
 	     /* perhaps sha1 is a tag, try to dereference to a commit */
-	     ((commit = lookup_commit_reference_gently(&oid, 1)) != NULL &&
+	     ((commit = lookup_commit_reference_gently(the_repository, &oid, 1)) != NULL &&
 	      !oidcmp(&cb.noid, &commit->object.oid)))) {
 		const char *from = ref;
 		if (!skip_prefix(from, "refs/tags/", &from))
@@ -2347,7 +2347,7 @@ int has_uncommitted_changes(int ignore_submodules)
 		 * We have no head (or it's corrupt); use the empty tree,
 		 * which will complain if the index is non-empty.
 		 */
-		struct tree *tree = lookup_tree(the_hash_algo->empty_tree);
+		struct tree *tree = lookup_tree(the_repository, the_hash_algo->empty_tree);
 		add_pending_object(&rev_info, &tree->object, "");
 	}