fast-import: tag may point to any object type

If you tried to export the official git repository, and then to import it
back then git-fast-import would die complaining that "Mark :1 not a commit".

Accordingly to a generated crash file, Mark 1 is not a commit but a blob,
which is pointed by junio-gpg-pub tag. Because git-tag allows to create such
tags, git-fast-import should import them.

Signed-off-by: Dmitry Potapov <dpotapov@gmail.com>
Acked-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/fast-import.c b/fast-import.c
index 6faaaacb68999db294d20ecbb30772223bfc1b57..36c5a8ebd99fb1ec1a250f7f3be1ab13c3eca3a8 100644 (file)
--- a/fast-import.c
+++ b/fast-import.c
@@ -2225,6 +2225,7 @@ static void parse_new_tag(void)
        struct tag *t;
        uintmax_t from_mark = 0;
        unsigned char sha1[20];
+       enum object_type type;
 
        /* Obtain the new tag name from the rest of our command */
        sp = strchr(command_buf.buf, ' ') + 1;
@@ -2245,19 +2246,18 @@ static void parse_new_tag(void)
        s = lookup_branch(from);
        if (s) {
                hashcpy(sha1, s->sha1);
+               type = OBJ_COMMIT;
        } else if (*from == ':') {
                struct object_entry *oe;
                from_mark = strtoumax(from + 1, NULL, 10);
                oe = find_mark(from_mark);
-               if (oe->type != OBJ_COMMIT)
-                       die("Mark :%" PRIuMAX " not a commit", from_mark);
+               type = oe->type;
                hashcpy(sha1, oe->sha1);
        } else if (!get_sha1(from, sha1)) {
                unsigned long size;
                char *buf;
 
-               buf = read_object_with_reference(sha1,
-                       commit_type, &size, sha1);
+               buf = read_sha1_file(sha1, &type, &size);
                if (!buf || size < 46)
                        die("Not a valid commit: %s", from);
                free(buf);
@@ -2282,7 +2282,7 @@ static void parse_new_tag(void)
                    "object %s\n"
                    "type %s\n"
                    "tag %s\n",
-                   sha1_to_hex(sha1), commit_type, t->name);
+                   sha1_to_hex(sha1), typename(type), t->name);
        if (tagger)
                strbuf_addf(&new_data,
                            "tagger %s\n", tagger);