@@ -1632,14 +1632,22 @@ static int set_head(const struct ref *remote_refs)
else
head_name = xstrdup(heads.items[0].string);
if (head_name) {
- strbuf_addf(&b_head, "refs/remotes/%s/HEAD", remote);
- strbuf_addf(&b_remote_head, "refs/remotes/%s/%s", remote, head_name);
+ int is_bare = is_bare_repository();
+ if (is_bare) {
+ strbuf_addstr(&b_head, "HEAD");
+ strbuf_addf(&b_remote_head, "refs/heads/%s", head_name);
+ } else {
+ strbuf_addf(&b_head, "refs/remotes/%s/HEAD", remote);
+ strbuf_addf(&b_remote_head, "refs/remotes/%s/%s", remote, head_name);
+ }
/* make sure it's valid */
- if (!refs_ref_exists(refs, b_remote_head.buf))
+ if (!is_bare && !refs_ref_exists(refs, b_remote_head.buf)) {
result = 1;
+ }
else if (refs_update_symref_extended(refs, b_head.buf, b_remote_head.buf,
- "fetch", &b_local_head, 1))
+ "fetch", &b_local_head, !is_bare)) {
result = 1;
+ }
else
report_set_head(remote, head_name, &b_local_head);
@@ -545,6 +545,16 @@ test_expect_success 'add --mirror && prune' '
)
'
+test_expect_success 'add --mirror setting HEAD' '
+ mkdir headmirror &&
+ (
+ cd headmirror &&
+ git init --bare -b notmain &&
+ git remote add --mirror -f origin ../one &&
+ test "$(git symbolic-ref HEAD)" = "refs/heads/main"
+ )
+'
+
test_expect_success 'add --mirror=fetch' '
mkdir mirror-fetch &&
git init -b main mirror-fetch/parent &&
When adding a remote to bare repository with "git remote add --mirror", running fetch will fail to update HEAD to the remote's HEAD, since it does not know how to handle bare repositories. On the other hand HEAD already has content, since "git init --bare" has already set HEAD to whatever is the default branch set for the user. Unless this - by chance - is the same as the remote's HEAD, HEAD will be pointing to a bad symref. Teach set_head to handle bare repositories, by overwriting HEAD so it mirrors the remote's HEAD. Note, that in this case overriding the local HEAD reference is necessary, since HEAD will exist before fetch can be run, but this should not be an issue, since the whole purpose of --mirror is to be an exact mirror of the remote, so following any changes to HEAD makes sense. Also note, that although "git remote set-head" also fails when trying to update the remote's locally tracked HEAD in a mirrored bare repository, the usage of the command does not make much sense after this patch: fetch will update the remote HEAD correctly, and setting it manually to something else is antithetical to the concept of mirroring. Signed-off-by: Bence Ferdinandy <bence@ferdinandy.com> --- Notes: v10: - new patch - handles the issue discovered in https://lore.kernel.org/git/D4ZAELFWJMKN.S88LJ6YK31LZ@ferdinandy.com/T/ builtin/fetch.c | 16 ++++++++++++---- t/t5505-remote.sh | 10 ++++++++++ 2 files changed, 22 insertions(+), 4 deletions(-)