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From: Stefan Beller <sbeller@google.com>
To: Nguyễn Thái Ngọc Duy  <pclouds@gmail.com>
Cc: "git@vger.kernel.org" <git@vger.kernel.org>, Junio C Hamano <gitster@pobox.com>, Michael Haggerty <mhagger@alum.mit.edu>
Subject: Re: [PATCH v4 04/16] revision.c: --indexed-objects add objects from all worktrees
Date: Wed, 23 Aug 2017 12:25:22 -0700
Message-ID: <CAGZ79kbPTr+DgcXcMmOax6SzLad4q8VByCiO=FH5hcmN7icc3g@mail.gmail.com> (raw)
In-Reply-To: <20170823123704.16518-5-pclouds@gmail.com>

On Wed, Aug 23, 2017 at 5:36 AM, Nguyễn Thái Ngọc Duy <pclouds@gmail.com> wrote:
> This is the result of single_worktree flag never being set (no way to up
> until now). To get objects from current index only, set single_worktree.
>
> The other add_index_objects_to_pending's caller is mark_reachable_objects()
> (e.g. "git prune") which also mark objects from all indexes.
>
> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
> ---
>  revision.c       | 21 +++++++++++++++++++++
>  t/t5304-prune.sh |  9 +++++++++
>  2 files changed, 30 insertions(+)
>
> diff --git a/revision.c b/revision.c
> index 6c46ad6c8a..f35cb49af5 100644
> --- a/revision.c
> +++ b/revision.c
> @@ -19,6 +19,7 @@
>  #include "dir.h"
>  #include "cache-tree.h"
>  #include "bisect.h"
> +#include "worktree.h"
>
>  volatile show_early_output_fn_t show_early_output;
>
> @@ -1290,8 +1291,28 @@ static void do_add_index_objects_to_pending(struct rev_info *revs,
>
>  void add_index_objects_to_pending(struct rev_info *revs, unsigned int flags)
>  {
> +       struct worktree **worktrees, **p;
> +
>         read_cache();
>         do_add_index_objects_to_pending(revs, &the_index);
> +
> +       if (revs->single_worktree)
> +               return;
> +
> +       worktrees = get_worktrees(0);
> +       for (p = worktrees; *p; p++) {
> +               struct worktree *wt = *p;
> +               struct index_state istate = { NULL };
> +
> +               if (wt->is_current)
> +                       continue; /* current index already taken care of */
> +
> +               if (read_index_from(&istate,
> +                                   worktree_git_path(wt, "index")) > 0)
> +                       do_add_index_objects_to_pending(revs, &istate);
> +               discard_index(&istate);
> +       }
> +       free_worktrees(worktrees);
>  }

The commit (message and code) looks acceptable and easy to read.
I wonder though if another approach would be more feasible:

* factor out anything after the early return into a new function
  "add_wt_index_objects_to_pending", maybe?
* introduce a new function
    for_each_wt_except_current(function, callback_cookie)
  such that this code could use this predefined iterator.
  (I have the impression I have seen this code pattern before,
  hence it may be useful to have such a foreach function; we
  have foreach functions already for various ref things, string
  list items, reflogs, and soon submodule lists)

>
>  static int add_parents_only(struct rev_info *revs, const char *arg_, int flags,
> diff --git a/t/t5304-prune.sh b/t/t5304-prune.sh
> index 133b5842b1..cba45c7be9 100755
> --- a/t/t5304-prune.sh
> +++ b/t/t5304-prune.sh
> @@ -283,4 +283,13 @@ test_expect_success 'prune: handle alternate object database' '
>         git -C B prune
>  '
>
> +test_expect_success 'prune: handle index in multiple worktrees' '
> +       git worktree add second-worktree &&
> +       echo "new blob for second-worktree" >second-worktree/blob &&
> +       git -C second-worktree add blob &&
> +       git prune --expire=now &&
> +       git -C second-worktree show :blob >actual &&
> +       test_cmp second-worktree/blob actual
> +'
> +
>  test_done
> --
> 2.11.0.157.gd943d85
>

  reply index

Thread overview: 40+ messages in thread (expand / mbox.gz / Atom feed / [top])
2017-08-23 12:36 [PATCH v4 00/16] Fix git-gc losing objects in multi worktree Nguyễn Thái Ngọc Duy
2017-08-23 12:36 ` [PATCH v4 01/16] revision.h: new flag in struct rev_info wrt. worktree-related refs Nguyễn Thái Ngọc Duy
2017-08-23 12:36 ` [PATCH v4 02/16] refs.c: use is_dir_sep() in resolve_gitlink_ref() Nguyễn Thái Ngọc Duy
2017-08-23 19:14   ` Stefan Beller
2017-09-06 11:08     ` Duy Nguyen
2017-09-06 17:41       ` Stefan Beller
2017-08-23 12:36 ` [PATCH v4 03/16] revision.c: refactor add_index_objects_to_pending() Nguyễn Thái Ngọc Duy
2017-08-23 12:36 ` [PATCH v4 04/16] revision.c: --indexed-objects add objects from all worktrees Nguyễn Thái Ngọc Duy
2017-08-23 19:25   ` Stefan Beller [this message]
2017-08-23 12:36 ` [PATCH v4 05/16] refs.c: refactor get_submodule_ref_store(), share common free block Nguyễn Thái Ngọc Duy
2017-08-23 19:34   ` Stefan Beller
2017-08-23 12:36 ` [PATCH v4 06/16] refs: move submodule slash stripping code to get_submodule_ref_store Nguyễn Thái Ngọc Duy
2017-09-09  5:45   ` Michael Haggerty
2017-08-23 12:36 ` [PATCH v4 07/16] refs: add refs_head_ref() Nguyễn Thái Ngọc Duy
2017-08-24 21:52   ` Junio C Hamano
2017-09-06 11:23     ` Duy Nguyen
2017-08-23 12:36 ` [PATCH v4 08/16] revision.c: use refs_for_each*() instead of for_each_*_submodule() Nguyễn Thái Ngọc Duy
2017-08-24 21:56   ` Junio C Hamano
2017-08-23 12:36 ` [PATCH v4 09/16] refs.c: move for_each_remote_ref_submodule() to submodule.c Nguyễn Thái Ngọc Duy
2017-08-23 12:36 ` [PATCH v4 10/16] refs: remove dead for_each_*_submodule() Nguyễn Thái Ngọc Duy
2017-08-23 19:45   ` Stefan Beller
2017-09-09  5:59   ` Michael Haggerty
2017-08-23 12:36 ` [PATCH v4 11/16] revision.c: --all adds HEAD from all worktrees Nguyễn Thái Ngọc Duy
2017-08-23 19:54   ` Stefan Beller
2017-09-06 11:19     ` Duy Nguyen
2017-09-06 17:43       ` Stefan Beller
2017-09-09  6:04   ` Michael Haggerty
2017-08-23 12:37 ` [PATCH v4 12/16] files-backend: make reflog iterator go through per-worktree reflog Nguyễn Thái Ngọc Duy
2017-08-24 14:13   ` Richard Maw
2017-09-09  6:30   ` Michael Haggerty
2017-08-23 12:37 ` [PATCH v4 13/16] revision.c: --reflog add HEAD reflog from all worktrees Nguyễn Thái Ngọc Duy
2017-08-23 12:37 ` [PATCH v4 14/16] rev-list: expose and document --single-worktree Nguyễn Thái Ngọc Duy
2017-08-23 20:45   ` Stefan Beller
2017-08-23 12:37 ` [PATCH v4 15/16] refs.c: remove fallback-to-main-store code get_submodule_ref_store() Nguyễn Thái Ngọc Duy
2017-09-09  6:36   ` Michael Haggerty
2017-08-23 12:37 ` [PATCH v4 16/16] refs.c: reindent " Nguyễn Thái Ngọc Duy
2017-09-09  6:41   ` Michael Haggerty
2017-08-25 11:21 ` [PATCH v4 00/16] Fix git-gc losing objects in multi worktree Michael J Gruber
2017-09-06 10:53   ` Duy Nguyen
2017-09-09  6:45 ` Michael Haggerty

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