Re: [PATCH v3 4/4] for-each-ref: avoid filtering on empty pattern

[Karthik Nayak <karthik.188@gmail.com>]

Hello,

On Tue, Feb 6, 2024 at 2:55 PM Phillip Wood <phillip.wood123@gmail.com> wrote:
>
> Hi Karthik
>
> On 06/02/2024 08:52, Karthik Nayak wrote:
> > On Mon, Feb 5, 2024 at 7:48 PM Phillip Wood <phillip.wood123@gmail.com> wrote:
> >> On 29/01/2024 11:35, Karthik Nayak wrote:
> >>> When the user uses an empty string pattern (""), we don't match any refs
> >>> in git-for-each-ref(1). This is because in git-for-each-ref(1), we use
> >>> path based matching and an empty string doesn't match any path.
> >>>
> >>> In this commit we change this behavior by making empty string pattern
> >>> match all references. This is done by introducing a new flag
> >>> `FILTER_REFS_NO_FILTER` in `ref-filter.c`, which uses the newly
> >>> introduced `refs_for_each_all_refs()` function to iterate over all the
> >>> refs in the repository.
> >>
> >> It actually iterates over all the refs in the current worktree, not all
> >> the refs in the repository. I have to say that I find it extremely
> >> unintuitive that "" behaves differently to not giving a pattern. I
> >> wonder if we can find a better UI here - perhaps a command line option
> >> to include pseudorefs?
> >>
> >
> > As Patrick mentioned, this was discussed a while ago and we decided to
> > move forward with the `git for-each-ref ""` syntax.
>
> Thanks I'd missed that discussion. I see that at the end of that
> discussion Junio was concerned that the proposed "" did not account for
> "refs/worktrees/$worktree/*" [1] - how has that been resolved?
>

The current implementation (merged to next) prints all the refs from the current
worktree and doesn't support printing from other worktrees.

    $ git worktree add ../wt-files @~10
    Preparing worktree (detached HEAD 559d5138bc)
    HEAD is now at 559d5138bc Merge branch 'jc/make-libpath-template' into next

    $ cd ../wt-files/
    direnv: unloading

    $ git for-each-ref "" | grep -v "refs"
    559d5138bc8b81354fd1bc3421ace614076e66de commit    HEAD
    559d5138bc8b81354fd1bc3421ace614076e66de commit    ORIG_HEAD

    $ git rebase -i @~3
    Stopped at be65f9ef88...  t/Makefile: get UNIT_TESTS list from C sources
    You can amend the commit now, with

      git commit --amend '-S'

    Once you are satisfied with your changes, run

      git rebase --continue

    $ git for-each-ref "" | grep -v "refs"
    be65f9ef88ff741454dcf10a0af6e384d0bf26cf commit    HEAD
    43f081b9c7dfb9c23e547ffee1778af0f30c5c4e commit    ORIG_HEAD
    be65f9ef88ff741454dcf10a0af6e384d0bf26cf commit    REBASE_HEAD