Re: [PATCH v3 1/2] refs: add a new function set_worktree_head_symref

> On Thu, Apr 07, 2016 at 05:20:10PM -0400, Eric Sunshine wrote:
>> On Sun, Mar 27, 2016 at 10:37 AM, Kazuki Yamaguchi <k@rhe.jp> wrote:
>> > +int set_worktree_head_symref(const char *gitdir, const char *target)
>> > +{
>> > +       static struct lock_file head_lock;
>> > +       struct ref_lock *lock;
>> > +       struct strbuf err = STRBUF_INIT;
>> > +       struct strbuf head_path = STRBUF_INIT;
>> > +       const char *head_rel;
>> > +       int ret;
>> > +
>> > +       strbuf_addf(&head_path, "%s/HEAD", absolute_path(gitdir));
>> > +       if (hold_lock_file_for_update(&head_lock, head_path.buf,
>> > +                                     LOCK_NO_DEREF) < 0) {
>> > +               error("%s", err.buf);
>>
>> 'err' has not been populated at this point, so I suspect that this
>> error message is likely to be rather uninformative.
>
> Yes, unable_to_lock_message() is missing. Thank you for pointing it out.