-static int write_pseudoref(const char *pseudoref, const struct object_id *oid,
- const struct object_id *old_oid, struct strbuf *err)
-{
- const char *filename;
- int fd;
- struct lock_file lock = LOCK_INIT;
- struct strbuf buf = STRBUF_INIT;
- int ret = -1;
-
- if (!oid)
- return 0;
-
- strbuf_addf(&buf, "%s\n", oid_to_hex(oid));
-
- filename = git_path("%s", pseudoref);
- fd = hold_lock_file_for_update_timeout(&lock, filename, 0,
- get_files_ref_lock_timeout_ms());
- if (fd < 0) {
- strbuf_addf(err, _("could not open '%s' for writing: %s"),
- filename, strerror(errno));
- goto done;
- }
-
- if (old_oid) {
- struct object_id actual_old_oid;
-
- if (read_ref(pseudoref, &actual_old_oid)) {
- if (!is_null_oid(old_oid)) {
- strbuf_addf(err, _("could not read ref '%s'"),
- pseudoref);
- rollback_lock_file(&lock);
- goto done;
- }
- } else if (is_null_oid(old_oid)) {
- strbuf_addf(err, _("ref '%s' already exists"),
- pseudoref);
- rollback_lock_file(&lock);
- goto done;
- } else if (oidcmp(&actual_old_oid, old_oid)) {
- strbuf_addf(err, _("unexpected object ID when writing '%s'"),
- pseudoref);
- rollback_lock_file(&lock);
- goto done;
- }
- }
-
- if (write_in_full(fd, buf.buf, buf.len) < 0) {
- strbuf_addf(err, _("could not write to '%s'"), filename);
- rollback_lock_file(&lock);
- goto done;
- }
-
- commit_lock_file(&lock);
- ret = 0;
-done:
- strbuf_release(&buf);
- return ret;
-}
-
-static int delete_pseudoref(const char *pseudoref, const struct object_id *old_oid)
-{
- const char *filename;
-
- filename = git_path("%s", pseudoref);
-
- if (old_oid && !is_null_oid(old_oid)) {
- struct lock_file lock = LOCK_INIT;
- int fd;
- struct object_id actual_old_oid;
-
- fd = hold_lock_file_for_update_timeout(
- &lock, filename, 0,
- get_files_ref_lock_timeout_ms());
- if (fd < 0) {
- error_errno(_("could not open '%s' for writing"),
- filename);
- return -1;
- }
- if (read_ref(pseudoref, &actual_old_oid))
- die(_("could not read ref '%s'"), pseudoref);
- if (oidcmp(&actual_old_oid, old_oid)) {
- error(_("unexpected object ID when deleting '%s'"),
- pseudoref);
- rollback_lock_file(&lock);
- return -1;
- }
-
- unlink(filename);
- rollback_lock_file(&lock);
- } else {
- unlink(filename);
- }
-
- return 0;
-}
-