tag: support arbitrary repositories in parse_tag()

Allow callers of parse_tag() pass in the repository to use.  Let most of
them pass in the_repository to get the same result as before.  One of
them has stopped using the_repository in ef9b0370da (sha1-name.c: store
and use repo in struct disambiguate_state, 2019-04-16); let it pass in
its stored repository.

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/describe.c

@@ -112,13 +112,13 @@ static int replace_name(struct commit_name *e,
 
 		if (!e->tag) {
 			t = lookup_tag(the_repository, &e->oid);
-			if (!t || parse_tag(t))
+			if (!t || parse_tag(the_repository, t))
 				return 1;
 			e->tag = t;
 		}
 
 		t = lookup_tag(the_repository, oid);
-		if (!t || parse_tag(t))
+		if (!t || parse_tag(the_repository, t))
 			return 0;
 		*tag = t;
 
@@ -335,7 +335,7 @@ static void append_name(struct commit_name *n, struct strbuf *dst)
 {
 	if (n->prio == 2 && !n->tag) {
 		n->tag = lookup_tag(the_repository, &n->oid);
-		if (!n->tag || parse_tag(n->tag))
+		if (!n->tag || parse_tag(the_repository, n->tag))
 			die(_("annotated tag %s not available"), n->path);
 	}
 	if (n->tag && !n->name_checked) {

builtin/pack-objects.c

@@ -3293,7 +3293,7 @@ static void add_tag_chain(const struct object_id *oid)
 
 	tag = lookup_tag(the_repository, oid);
 	while (1) {
-		if (!tag || parse_tag(tag) || !tag->tagged)
+		if (!tag || parse_tag(the_repository, tag) || !tag->tagged)
 			die(_("unable to pack objects reachable from tag %s"),
 			    oid_to_hex(oid));
 

fsck.c

@@ -474,7 +474,7 @@ static int fsck_walk_tag(struct tag *tag, void *data, struct fsck_options *optio
 {
 	const char *name = fsck_get_object_name(options, &tag->object.oid);
 
-	if (parse_tag(tag))
+	if (parse_tag(the_repository, tag))
 		return -1;
 	if (name)
 		fsck_put_object_name(options, &tag->tagged->oid, "%s", name);

object-name.c

@@ -449,7 +449,7 @@ static int show_ambiguous_object(const struct object_id *oid, void *data)
 	} else if (type == OBJ_TAG) {
 		struct tag *tag = lookup_tag(ds->repo, oid);
 
-		if (!parse_tag(tag) && tag->tag) {
+		if (!parse_tag(ds->repo, tag) && tag->tag) {
 			/*
 			 * TRANSLATORS: This is a line of ambiguous
 			 * tag object output. E.g.:

ref-filter.c

@@ -2866,7 +2866,7 @@ static int match_points_at(struct oid_array *points_at,
 	while (obj && obj->type == OBJ_TAG) {
 		struct tag *tag = (struct tag *)obj;
 
-		if (parse_tag(tag) < 0) {
+		if (parse_tag(the_repository, tag) < 0) {
 			obj = NULL;
 			break;
 		}

tag.c

@@ -13,6 +13,7 @@
 #include "gpg-interface.h"
 #include "hex.h"
 #include "packfile.h"
+#include "repository.h"
 
 const char *tag_type = "tag";
 
@@ -203,7 +204,7 @@ int parse_tag_buffer(struct repository *r, struct tag *item, const void *data, u
 	return 0;
 }
 
-int parse_tag(struct tag *item)
+int parse_tag(struct repository *r, struct tag *item)
 {
 	enum object_type type;
 	void *data;
@@ -212,8 +213,7 @@ int parse_tag(struct tag *item)
 
 	if (item->object.parsed)
 		return 0;
-	data = odb_read_object(the_repository->objects, &item->object.oid,
+	data = odb_read_object(r->objects, &item->object.oid, &type, &size);
-			       &type, &size);
 	if (!data)
 		return error("Could not read %s",
 			     oid_to_hex(&item->object.oid));
@@ -222,7 +222,7 @@ int parse_tag(struct tag *item)
 		return error("Object %s not a tag",
 			     oid_to_hex(&item->object.oid));
 	}
-	ret = parse_tag_buffer(the_repository, item, data, size);
+	ret = parse_tag_buffer(r, item, data, size);
 	free(data);
 	return ret;
 }

tag.h

@@ -13,7 +13,7 @@ struct tag {
 };
 struct tag *lookup_tag(struct repository *r, const struct object_id *oid);
 int parse_tag_buffer(struct repository *r, struct tag *item, const void *data, unsigned long size);
-int parse_tag(struct tag *item);
+int parse_tag(struct repository *r, struct tag *item);
 void release_tag_memory(struct tag *t);
 struct object *deref_tag(struct repository *r, struct object *, const char *, int);
 int gpg_verify_tag(struct repository *r, const struct object_id *oid,

walker.c

@@ -115,7 +115,7 @@ static int process_commit(struct walker *walker, struct commit *commit)
 
 static int process_tag(struct walker *walker, struct tag *tag)
 {
-	if (parse_tag(tag))
+	if (parse_tag(the_repository, tag))
 		return -1;
 	return process(walker, tag->tagged);
 }