Merge branch 'nd/worktree-kill-parse-ref'

"git gc" did not interact well with "git worktree"-managed
per-worktree refs.

* nd/worktree-kill-parse-ref:
  refs: kill set_worktree_head_symref()
  worktree.c: kill parse_ref() in favor of refs_resolve_ref_unsafe()
  refs: introduce get_worktree_ref_store()
  refs: add REFS_STORE_ALL_CAPS
  refs.c: make submodule ref store hashmap generic
  environment.c: fix potential segfault by get_git_common_dir()

1 files changed, 8 insertions, 7 deletions

diff --git a/branch.c b/branch.c
index ad5a2299ba..bb9eb60dcd 100644
--- a/branch.c
+++ b/branch.c
@@ -353,17 +353,18 @@ int replace_each_worktree_head_symref(const char *oldref, const char *newref,
 	int i;
 
 	for (i = 0; worktrees[i]; i++) {
+		struct ref_store *refs;
+
 		if (worktrees[i]->is_detached)
 			continue;
-		if (strcmp(oldref, worktrees[i]->head_ref))
+		if (worktrees[i]->head_ref &&
+		    strcmp(oldref, worktrees[i]->head_ref))
 			continue;
 
-		if (set_worktree_head_symref(get_worktree_git_dir(worktrees[i]),
-					     newref, logmsg)) {
-			ret = -1;
-			error(_("HEAD of working tree %s is not updated"),
-			      worktrees[i]->path);
-		}
+		refs = get_worktree_ref_store(worktrees[i]);
+		if (refs_create_symref(refs, "HEAD", newref, logmsg))
+			ret = error(_("HEAD of working tree %s is not updated"),
+				    worktrees[i]->path);
 	}
 
 	free_worktrees(worktrees);