return 0;
}
+static inline int is_forwardable(struct ref* ref)
+{
+ struct object *o;
+
+ if (!prefixcmp(ref->name, "refs/tags/"))
+ return 0;
+
+ /* old object must be a commit */
+ o = parse_object(ref->old_sha1);
+ if (!o || o->type != OBJ_COMMIT)
+ return 0;
+
+ /* new object must be commit-ish */
+ o = deref_tag(parse_object(ref->new_sha1), NULL, 0);
+ if (!o || o->type != OBJ_COMMIT)
+ return 0;
+
+ return 1;
+}
+
void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
int force_update)
{
struct ref *ref;
for (ref = remote_refs; ref; ref = ref->next) {
+ int force_ref_update = ref->force || force_update;
+
if (ref->peer_ref)
hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
else if (!send_mirror)
continue;
}
- /* This part determines what can overwrite what.
- * The rules are:
+ /*
+ * The below logic determines whether an individual
+ * refspec A:B can be pushed. The push will succeed
+ * if any of the following are true:
+ *
+ * (1) the remote reference B does not exist
*
- * (0) you can always use --force or +A:B notation to
- * selectively force individual ref pairs.
+ * (2) the remote reference B is being removed (i.e.,
+ * pushing :B where no source is specified)
*
- * (1) if the old thing does not exist, it is OK.
+ * (3) the update meets all fast-forwarding criteria:
*
- * (2) if you do not have the old thing, you are not allowed
- * to overwrite it; you would not know what you are losing
- * otherwise.
+ * (a) the destination is not under refs/tags/
+ * (b) the old is a commit
+ * (c) the new is a descendant of the old
*
- * (3) if both new and old are commit-ish, and new is a
- * descendant of old, it is OK.
+ * NOTE: We must actually have the old object in
+ * order to overwrite it in the remote reference,
+ * and the new object must be commit-ish. These are
+ * implied by (b) and (c) respectively.
*
- * (4) regardless of all of the above, removing :B is
- * always allowed.
+ * (4) it is forced using the +A:B notation, or by
+ * passing the --force argument
*/
- ref->nonfastforward =
- !ref->deletion &&
- !is_null_sha1(ref->old_sha1) &&
- (!has_sha1_file(ref->old_sha1)
- || !ref_newer(ref->new_sha1, ref->old_sha1));
+ ref->not_forwardable = !is_forwardable(ref);
- if (ref->nonfastforward && !ref->force && !force_update) {
- ref->status = REF_STATUS_REJECT_NONFASTFORWARD;
- continue;
+ ref->update =
+ !ref->deletion &&
+ !is_null_sha1(ref->old_sha1);
+
+ if (ref->update) {
+ ref->nonfastforward =
+ !has_sha1_file(ref->old_sha1)
+ || !ref_newer(ref->new_sha1, ref->old_sha1);
+
+ if (ref->not_forwardable) {
+ ref->requires_force = 1;
+ if (!force_ref_update) {
+ ref->status = REF_STATUS_REJECT_ALREADY_EXISTS;
+ continue;
+ }
+ } else if (ref->nonfastforward) {
+ ref->requires_force = 1;
+ if (!force_ref_update) {
+ ref->status = REF_STATUS_REJECT_NONFASTFORWARD;
+ continue;
+ }
+ }
}
}
}
return refname_match(branch->merge[i]->src, refname, ref_fetch_rules);
}
+static int ignore_symref_update(const char *refname)
+{
+ unsigned char sha1[20];
+ int flag;
+
+ if (!resolve_ref_unsafe(refname, sha1, 0, &flag))
+ return 0; /* non-existing refs are OK */
+ return (flag & REF_ISSYMREF);
+}
+
static struct ref *get_expanded_map(const struct ref *remote_refs,
const struct refspec *refspec)
{
if (strchr(ref->name, '^'))
continue; /* a dereference item */
if (match_name_with_pattern(refspec->src, ref->name,
- refspec->dst, &expn_name)) {
+ refspec->dst, &expn_name) &&
+ !ignore_symref_update(expn_name)) {
struct ref *cpy = copy_ref(ref);
cpy->peer_ref = alloc_ref(expn_name);
"Your branch is ahead of '%s' by %d commits.\n",
num_ours),
base, num_ours);
- strbuf_addf(sb,
- _(" (use \"git push\" to publish your local commits)\n"));
+ if (advice_status_hints)
+ strbuf_addf(sb,
+ _(" (use \"git push\" to publish your local commits)\n"));
} else if (!num_ours) {
strbuf_addf(sb,
Q_("Your branch is behind '%s' by %d commit, "
"and can be fast-forwarded.\n",
num_theirs),
base, num_theirs);
- strbuf_addf(sb,
- _(" (use \"git pull\" to update your local branch)\n"));
+ if (advice_status_hints)
+ strbuf_addf(sb,
+ _(" (use \"git pull\" to update your local branch)\n"));
} else {
strbuf_addf(sb,
Q_("Your branch and '%s' have diverged,\n"
"respectively.\n",
num_theirs),
base, num_ours, num_theirs);
- strbuf_addf(sb,
- _(" (use \"git pull\" to merge the remote branch into yours)\n"));
+ if (advice_status_hints)
+ strbuf_addf(sb,
+ _(" (use \"git pull\" to merge the remote branch into yours)\n"));
}
return 1;
}