Re: [PATCH 1/1] worktree refs: fix case sensitivity for 'head'

[Mike Rappazzo <rappazzo@gmail.com>]

On Thu, Dec 13, 2018 at 3:23 PM Duy Nguyen <pclouds@gmail.com> wrote:
>
> On Thu, Dec 13, 2018 at 8:56 PM Michael Rappazzo via GitGitGadget
> <gitgitgadget@gmail.com> wrote:
> >
> > From: Michael Rappazzo <rappazzo@gmail.com>
> >
> > On a worktree which is not the primary, using the symbolic-ref 'head' was
> > incorrectly pointing to the main worktree's HEAD.  The same was true for
> > any other case of the word 'Head'.
> >
> > Signed-off-by: Michael Rappazzo <rappazzo@gmail.com>
> > ---
> >  refs.c                   | 8 ++++----
> >  t/t1415-worktree-refs.sh | 9 +++++++++
> >  2 files changed, 13 insertions(+), 4 deletions(-)
> >
> > diff --git a/refs.c b/refs.c
> > index f9936355cd..963e786458 100644
> > --- a/refs.c
> > +++ b/refs.c
> > @@ -579,7 +579,7 @@ int expand_ref(const char *str, int len, struct object_id *oid, char **ref)
> >                                 *ref = xstrdup(r);
> >                         if (!warn_ambiguous_refs)
> >                                 break;
> > -               } else if ((flag & REF_ISSYMREF) && strcmp(fullref.buf, "HEAD")) {
> > +               } else if ((flag & REF_ISSYMREF) && strcasecmp(fullref.buf, "HEAD")) {
>
> This is not going to work. How about ~40 other "strcmp.*HEAD"
> instances? All refs are case-sensitive and this probably will not
> change even when we introduce new ref backends.

The current situation is definitely a problem.  If I am in a worktree,
using "head" should be the same as "HEAD".

I am not sure if you mean that the fix is too narrow or too wide.
Maybe it is only necessary in 'is_per_worktree_ref'.  On the other
side of the coin, I could change every strcmp to strcasecmp where the
comparison is against "HEAD".


>
> >                         warning(_("ignoring dangling symref %s"), fullref.buf);
> >                 } else if ((flag & REF_ISBROKEN) && strchr(fullref.buf, '/')) {
> >                         warning(_("ignoring broken ref %s"), fullref.buf);
> --
> Duy