Re: [RFC PATCH 1/1] for-each-ref: add '--no-symbolic' option

From: Eric Freese <ericdfreese@gmail.com>
Date: Sep 9, 2019, 04:01 UTC
Message-ID: <CAAikoA+MvORDJ6y=VSk_1s6v7110UeOfU2X2G7=9ChV+m+COxQ@mail.gmail.com>
In-Reply-To: <xmqq4l1mmn8i.fsf@gitster-ct.c.googlers.com>

On Sun, Sep 9, 2019 at 4:34 PM Junio C Hamano <gitster@pobox.com> wrote:

Show 5 quoted lines

> I guess with "%(if)...%(then)...%(else)...%(end)" you might be able
> to do either one of --include/--exclude without supporting the
> other, e.g. "--include='%(if)%(symref)%(then)%(else)not a
> symref%(end)" would be usable as "I do not want to see symrefs" in a
> system that supports only "--include" without "--exclude".

This has made me realize that I can get the behavior I need by using `%(if)`.

Exclude symrefs:
  "%(if)%(symref)%(then)%(else)%(refname)%(end)"

Only symrefs:
  "%(if)%(symref)%(then)%(refname)%(end)"

However, this still prints an empty line for each ref that does not match the condition. This can be cleaned up by piping through `grep .`, but what would you think of adding a new optional flag to git-for-each-ref to prevent it from printing empty expanded format strings?