Re: [PATCH v2 5/5] branch -d: refuse deleting a branch which is currently checked out

> When a branch is checked out by current working tree, deleting the
> branch is forbidden. However when the branch is checked out only by
> other working trees, deleting is allowed.
> Use find_shared_symref() to check if the branch is in use, not just
> comparing with the current working tree's HEAD.
>
> Signed-off-by: Kazuki Yamaguchi <k@rhe.jp>
> ---
> diff --git a/builtin/branch.c b/builtin/branch.c
> @@ -215,16 +216,17 @@ static int delete_branches(int argc, const char **argv, int force, int kinds,
>                 int flags = 0;
>
>                 strbuf_branchname(&bname, argv[i]);
> -               if (kinds == FILTER_REFS_BRANCHES && !strcmp(head, bname.buf)) {
> +               free(name);
> +               name = mkpathdup(fmt, bname.buf);
> +
> +               if (kinds == FILTER_REFS_BRANCHES &&
> +                   find_shared_symref("HEAD", name)) {
>                         error(_("Cannot delete the branch '%s' "
> -                             "which you are currently on."), bname.buf);
> +                             "which is currently checked out."), bname.buf);