commit: copy merged signed tags to headers of merge commit
Now MERGE_HEAD records the tag objects without peeling, we could record
the result of manual conflict resolution via "git commit" without losing
the tag information. Introduce a new "mergetag" multi-line header field to
the commit object, and use it to store the entire contents of each signed
tag merged.
A commit header that has a multi-line payload begins with the header tag
(e.g. "mergetag" in this case), SP, the first line of payload, LF, and all
the remaining lines have a SP inserted at the beginning.
In hindsight, it would have been better to make "merge --continue" as the
way to continue from such an interrupted merge, not "commit", but this is
a backward compatibility baggage we would need to carry around for now.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/commit.c b/builtin/commit.c
index c46f2d1..4688a73 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1425,7 +1425,6 @@
pptr = &commit_list_insert(c->item, pptr)->next;
} else if (whence == FROM_MERGE) {
struct strbuf m = STRBUF_INIT;
- struct commit *commit;
FILE *fp;
if (!reflog_msg)
@@ -1436,11 +1435,12 @@
die_errno(_("could not open '%s' for reading"),
git_path("MERGE_HEAD"));
while (strbuf_getline(&m, fp, '\n') != EOF) {
- unsigned char sha1[20];
- if (get_sha1_hex(m.buf, sha1) < 0)
+ struct commit *parent;
+
+ parent = get_merge_parent(m.buf);
+ if (!parent)
die(_("Corrupt MERGE_HEAD file (%s)"), m.buf);
- commit = lookup_commit_or_die(sha1, "MERGE_HEAD");
- pptr = &commit_list_insert(commit, pptr)->next;
+ pptr = &commit_list_insert(parent, pptr)->next;
}
fclose(fp);
strbuf_release(&m);
