revert(3p/git): Revert merge of git upstream at v2.26.2 r/852

This causes cgit to serve error pages, which is undesirable.

This reverts commit 5229c9b232de5bfa959ad6ebbb4c8192ac513352, reversing
changes made to f2b211131f2347342dde63975b09cf603149f1a3.

1 files changed, 25 insertions, 63 deletions

diff --git a/third_party/git/builtin/fast-export.c b/third_party/git/builtin/fast-export.c
index 85868162eec9..f541f55d333b 100644
--- a/third_party/git/builtin/fast-export.c
+++ b/third_party/git/builtin/fast-export.c
@@ -40,7 +40,6 @@ static int no_data;
 static int full_tree;
 static int reference_excluded_commits;
 static int show_original_ids;
-static int mark_tags;
 static struct string_list extra_refs = STRING_LIST_INIT_NODUP;
 static struct string_list tag_refs = STRING_LIST_INIT_NODUP;
 static struct refspec refspecs = REFSPEC_INIT_FETCH;
@@ -127,15 +126,10 @@ struct anonymized_entry {
 };
 
 static int anonymized_entry_cmp(const void *unused_cmp_data,
-				const struct hashmap_entry *eptr,
-				const struct hashmap_entry *entry_or_key,
+				const void *va, const void *vb,
 				const void *unused_keydata)
 {
-	const struct anonymized_entry *a, *b;
-
-	a = container_of(eptr, const struct anonymized_entry, hash);
-	b = container_of(entry_or_key, const struct anonymized_entry, hash);
-
+	const struct anonymized_entry *a = va, *b = vb;
 	return a->orig_len != b->orig_len ||
 		memcmp(a->orig, b->orig, a->orig_len);
 }
@@ -154,10 +148,10 @@ static const void *anonymize_mem(struct hashmap *map,
 	if (!map->cmpfn)
 		hashmap_init(map, anonymized_entry_cmp, NULL, 0);
 
-	hashmap_entry_init(&key.hash, memhash(orig, *len));
+	hashmap_entry_init(&key, memhash(orig, *len));
 	key.orig = orig;
 	key.orig_len = *len;
-	ret = hashmap_get_entry(map, &key, hash, NULL);
+	ret = hashmap_get(map, &key, NULL);
 
 	if (!ret) {
 		ret = xmalloc(sizeof(*ret));
@@ -166,7 +160,7 @@ static const void *anonymize_mem(struct hashmap *map,
 		ret->orig_len = *len;
 		ret->anon = generate(orig, len);
 		ret->anon_len = *len;
-		hashmap_put(map, &ret->hash);
+		hashmap_put(map, ret);
 	}
 
 	*len = ret->anon_len;
@@ -293,8 +287,7 @@ static void export_blob(const struct object_id *oid)
 		buf = read_object_file(oid, &type, &size);
 		if (!buf)
 			die("could not read blob %s", oid_to_hex(oid));
-		if (check_object_signature(the_repository, oid, buf, size,
-					   type_name(type)) < 0)
+		if (check_object_signature(oid, buf, size, type_name(type)) < 0)
 			die("oid mismatch in blob %s", oid_to_hex(oid));
 		object = parse_object_buffer(the_repository, oid, type,
 					     size, buf, &eaten);
@@ -849,39 +842,25 @@ static void handle_tag(const char *name, struct tag *tag)
 			free(buf);
 			return;
 		case REWRITE:
-			if (tagged->type == OBJ_TAG && !mark_tags) {
-				die(_("Error: Cannot export nested tags unless --mark-tags is specified."));
-			} else if (tagged->type == OBJ_COMMIT) {
-				p = rewrite_commit((struct commit *)tagged);
-				if (!p) {
-					printf("reset %s\nfrom %s\n\n",
-					       name, oid_to_hex(&null_oid));
-					free(buf);
-					return;
-				}
-				tagged_mark = get_object_mark(&p->object);
-			} else {
-				/* tagged->type is either OBJ_BLOB or OBJ_TAG */
-				tagged_mark = get_object_mark(tagged);
+			if (tagged->type != OBJ_COMMIT) {
+				die("tag %s tags unexported %s!",
+				    oid_to_hex(&tag->object.oid),
+				    type_name(tagged->type));
+			}
+			p = rewrite_commit((struct commit *)tagged);
+			if (!p) {
+				printf("reset %s\nfrom %s\n\n",
+				       name, oid_to_hex(&null_oid));
+				free(buf);
+				return;
 			}
+			tagged_mark = get_object_mark(&p->object);
 		}
 	}
 
-	if (tagged->type == OBJ_TAG) {
-		printf("reset %s\nfrom %s\n\n",
-		       name, oid_to_hex(&null_oid));
-	}
-	skip_prefix(name, "refs/tags/", &name);
-	printf("tag %s\n", name);
-	if (mark_tags) {
-		mark_next_object(&tag->object);
-		printf("mark :%"PRIu32"\n", last_idnum);
-	}
-	if (tagged_mark)
-		printf("from :%d\n", tagged_mark);
-	else
-		printf("from %s\n", oid_to_hex(&tagged->oid));
-
+	if (starts_with(name, "refs/tags/"))
+		name += 10;
+	printf("tag %s\nfrom :%d\n", name, tagged_mark);
 	if (show_original_ids)
 		printf("original-oid %s\n", oid_to_hex(&tag->object.oid));
 	printf("%.*s%sdata %d\n%.*s\n",
@@ -1068,16 +1047,11 @@ static void export_marks(char *file)
 		error("Unable to write marks file %s.", file);
 }
 
-static void import_marks(char *input_file, int check_exists)
+static void import_marks(char *input_file)
 {
 	char line[512];
-	FILE *f;
-	struct stat sb;
-
-	if (check_exists && stat(input_file, &sb))
-		return;
+	FILE *f = xfopen(input_file, "r");
 
-	f = xfopen(input_file, "r");
 	while (fgets(line, sizeof(line), f)) {
 		uint32_t mark;
 		char *line_end, *mark_end;
@@ -1141,9 +1115,7 @@ int cmd_fast_export(int argc, const char **argv, const char *prefix)
 	struct rev_info revs;
 	struct object_array commits = OBJECT_ARRAY_INIT;
 	struct commit *commit;
-	char *export_filename = NULL,
-	     *import_filename = NULL,
-	     *import_filename_if_exists = NULL;
+	char *export_filename = NULL, *import_filename = NULL;
 	uint32_t lastimportid;
 	struct string_list refspecs_list = STRING_LIST_INIT_NODUP;
 	struct string_list paths_of_changed_objects = STRING_LIST_INIT_DUP;
@@ -1163,10 +1135,6 @@ int cmd_fast_export(int argc, const char **argv, const char *prefix)
 			     N_("Dump marks to this file")),
 		OPT_STRING(0, "import-marks", &import_filename, N_("file"),
 			     N_("Import marks from this file")),
-		OPT_STRING(0, "import-marks-if-exists",
-			     &import_filename_if_exists,
-			     N_("file"),
-			     N_("Import marks from this file if it exists")),
 		OPT_BOOL(0, "fake-missing-tagger", &fake_missing_tagger,
 			 N_("Fake a tagger when tags lack one")),
 		OPT_BOOL(0, "full-tree", &full_tree,
@@ -1181,8 +1149,6 @@ int cmd_fast_export(int argc, const char **argv, const char *prefix)
 			 &reference_excluded_commits, N_("Reference parents which are not in fast-export stream by object id")),
 		OPT_BOOL(0, "show-original-ids", &show_original_ids,
 			    N_("Show original object ids of blobs/commits")),
-		OPT_BOOL(0, "mark-tags", &mark_tags,
-			    N_("Label tags with mark ids")),
 
 		OPT_END()
 	};
@@ -1216,12 +1182,8 @@ int cmd_fast_export(int argc, const char **argv, const char *prefix)
 	if (use_done_feature)
 		printf("feature done\n");
 
-	if (import_filename && import_filename_if_exists)
-		die(_("Cannot pass both --import-marks and --import-marks-if-exists"));
 	if (import_filename)
-		import_marks(import_filename, 0);
-	else if (import_filename_if_exists)
-		import_marks(import_filename_if_exists, 1);
+		import_marks(import_filename);
 	lastimportid = last_idnum;
 
 	if (import_filename && revs.prune_data.nr)