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From: Elijah Newren <newren@gmail.com>
To: Derrick Stolee via GitGitGadget <gitgitgadget@gmail.com>
Cc: Git Mailing List <git@vger.kernel.org>,
	Junio C Hamano <gitster@pobox.com>,
	Derrick Stolee <dstolee@microsoft.com>
Subject: Re: [PATCH v2 06/11] sparse-checkout: create 'disable' subcommand
Date: Sat, 5 Oct 2019 21:10:29 -0700
Message-ID: <CABPp-BHYCCD+Vx5fq35jH82eHc1-P53Lz_aGNpHJNcx9kg2K-A@mail.gmail.com> (raw)
In-Reply-To: <b62b76013f98e57089c9b0c03209e28757977dd7.1568904188.git.gitgitgadget@gmail.com>

On Thu, Sep 19, 2019 at 1:46 PM Derrick Stolee via GitGitGadget
<gitgitgadget@gmail.com> wrote:
>
> From: Derrick Stolee <dstolee@microsoft.com>
>
> The instructions for disabling a sparse-checkout to a full
> working directory are complicated and non-intuitive. Add a
> subcommand, 'git sparse-checkout disable', to perform those
> steps for the user.
>
> Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
> ---
>  Documentation/git-sparse-checkout.txt | 26 ++++++++-----------
>  builtin/sparse-checkout.c             | 37 ++++++++++++++++++++++++---
>  t/t1091-sparse-checkout-builtin.sh    | 15 +++++++++++
>  3 files changed, 59 insertions(+), 19 deletions(-)
>
> diff --git a/Documentation/git-sparse-checkout.txt b/Documentation/git-sparse-checkout.txt
> index 87813e5797..da95b28b1c 100644
> --- a/Documentation/git-sparse-checkout.txt
> +++ b/Documentation/git-sparse-checkout.txt
> @@ -39,6 +39,10 @@ COMMANDS
>         a list of arguments following the 'set' subcommand. Update the
>         working directory to match the new patterns.
>
> +'disable'::
> +       Remove the sparse-checkout file, set `core.sparseCheckout` to
> +       `false`, and restore the working directory to include all files.

Good, so 'init' (and maybe 'set'?) will set core.sparseCheckout, and
disable will unset it, so the user doesn't have to worry about it...

> +
>  SPARSE CHECKOUT
>  ----------------
>
> @@ -61,6 +65,13 @@ Then it compares the new skip-worktree value with the previous one. If
>  skip-worktree turns from set to unset, it will add the corresponding
>  file back. If it turns from unset to set, that file will be removed.
>
> +To repopulate the working directory with all files, use the
> +`git sparse-checkout disable` command.

Good.

> +Sparse checkout support in 'git checkout' and similar commands is
> +disabled by default. You need to set `core.sparseCheckout` to `true`
> +in order to have sparse checkout support.

Aren't we having the user use 'git sparse-checkout init' to do that?
Why guide them to the core.sparseCheckout option?  And why mention it
without extensions.worktreeConfig?

> +
>  ## FULL PATTERN SET
>
>  By default, the sparse-checkout file uses the same syntax as `.gitignore`
> @@ -75,21 +86,6 @@ using negative patterns. For example, to remove the file `unwanted`:
>  !unwanted
>  ----------------
>
> -Another tricky thing is fully repopulating the working directory when you
> -no longer want sparse checkout. You cannot just disable "sparse
> -checkout" because skip-worktree bits are still in the index and your working
> -directory is still sparsely populated. You should re-populate the working
> -directory with the `$GIT_DIR/info/sparse-checkout` file content as
> -follows:
> -
> -----------------
> -/*
> -----------------

Yaay, glad to see this removed.

> -Then you can disable sparse checkout. Sparse checkout support in 'git
> -read-tree' and similar commands is disabled by default. You need to
> -set `core.sparseCheckout` to `true` in order to have sparse checkout
> -support.
>
>  SEE ALSO
>  --------
> diff --git a/builtin/sparse-checkout.c b/builtin/sparse-checkout.c
> index f726fcd6b8..f858f0b1b5 100644
> --- a/builtin/sparse-checkout.c
> +++ b/builtin/sparse-checkout.c
> @@ -8,7 +8,7 @@
>  #include "strbuf.h"
>
>  static char const * const builtin_sparse_checkout_usage[] = {
> -       N_("git sparse-checkout [init|list|set] <options>"),
> +       N_("git sparse-checkout [init|list|set|disable] <options>"),
>         NULL
>  };
>
> @@ -74,7 +74,7 @@ static int update_working_directory(void)
>         return result;
>  }
>
> -static int sc_enable_config(void)
> +static int sc_set_config(int mode)

Nice to see this change from the RFC round; do we want to use an enum
instead of an int, or is the int good enough?  (No strong opinion
here, just asking.)

>  {
>         struct argv_array argv = ARGV_ARRAY_INIT;
>
> @@ -83,7 +83,12 @@ static int sc_enable_config(void)
>                 return 1;
>         }
>
> -       argv_array_pushl(&argv, "config", "--worktree", "core.sparseCheckout", "true", NULL);
> +       argv_array_pushl(&argv, "config", "--worktree", "core.sparseCheckout", NULL);
> +
> +       if (mode)
> +               argv_array_pushl(&argv, "true", NULL);
> +       else
> +               argv_array_pushl(&argv, "false", NULL);
>
>         if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
>                 error(_("failed to enable core.sparseCheckout"));
> @@ -101,7 +106,7 @@ static int sparse_checkout_init(int argc, const char **argv)
>         int res;
>         struct object_id oid;
>
> -       if (sc_enable_config())
> +       if (sc_set_config(1))
>                 return 1;
>
>         memset(&pl, 0, sizeof(pl));
> @@ -188,6 +193,28 @@ static int sparse_checkout_set(int argc, const char **argv, const char *prefix)
>         return write_patterns_and_update(&pl);
>  }
>
> +static int sparse_checkout_disable(int argc, const char **argv)
> +{
> +       char *sparse_filename;
> +       FILE *fp;
> +
> +       if (sc_set_config(1))
> +               die(_("failed to change config"));
> +
> +       sparse_filename = get_sparse_checkout_filename();
> +       fp = fopen(sparse_filename, "w");
> +       fprintf(fp, "/*\n");
> +       fclose(fp);
> +
> +       if (update_working_directory())
> +               die(_("error while refreshing working directory"));
> +
> +       unlink(sparse_filename);
> +       free(sparse_filename);
> +
> +       return sc_set_config(0);
> +}

So we update the .git/info/sparse-checkout file first (or the
worktree-specific equivalent), then call update_working_directory()
which can fail -- in particular if the user calls it when they have
any conflicted files.  But then the sparse-checkout file has already
been emptied, so it did make some changes, just not all the changes
the user would expect, leaving them in an intermediate state with an
error message that doesn't explain how to recover.  Would it be worth
checking for this case, and telling the user to fix up conflicts then
re-run the disable command?  Would it make more sense to just replace
the 'read-tree -mu HEAD' with something that doesn't error out in such
a case?  Or is this just a shortcoming of an experimental feature that
we'll get to later?  (I'm okay with the last of those, since we also
still need to address defaults of several other commands when sparse
checkouts are active[1].)

[1] https://public-inbox.org/git/CABPp-BGuFhDwWZBRaD3nA8ui46wor-4=Ha1G1oApsfF8KNpfGQ@mail.gmail.com/

> +
>  int cmd_sparse_checkout(int argc, const char **argv, const char *prefix)
>  {
>         static struct option builtin_sparse_checkout_options[] = {
> @@ -212,6 +239,8 @@ int cmd_sparse_checkout(int argc, const char **argv, const char *prefix)
>                         return sparse_checkout_init(argc, argv);
>                 if (!strcmp(argv[0], "set"))
>                         return sparse_checkout_set(argc, argv, prefix);
> +               if (!strcmp(argv[0], "disable"))
> +                       return sparse_checkout_disable(argc, argv);
>         }
>
>         usage_with_options(builtin_sparse_checkout_usage,
> diff --git a/t/t1091-sparse-checkout-builtin.sh b/t/t1091-sparse-checkout-builtin.sh
> index 02ba9ec314..22fa032d6d 100755
> --- a/t/t1091-sparse-checkout-builtin.sh
> +++ b/t/t1091-sparse-checkout-builtin.sh
> @@ -140,5 +140,20 @@ test_expect_success 'set sparse-checkout using --stdin' '
>         test_cmp expect dir
>  '
>
> +test_expect_success 'sparse-checkout disable' '
> +       git -C repo sparse-checkout disable &&
> +       test_path_is_missing repo/.git/info/sparse-checkout &&
> +       git -C repo config --list >config &&
> +       test_i18ngrep "core.sparsecheckout=false" config &&
> +       ls repo >dir &&
> +       cat >expect <<-EOF &&
> +               a
> +               deep
> +               folder1
> +               folder2
> +       EOF
> +       test_cmp expect dir
> +'
> +
>  test_done

The rest of the patch looks good.

  reply index

Thread overview: 154+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-20 15:11 [PATCH 0/9] [RFC] New sparse-checkout builtin and "cone" mode Derrick Stolee via GitGitGadget
2019-08-20 15:11 ` [PATCH 1/9] sparse-checkout: create builtin with 'list' subcommand Derrick Stolee via GitGitGadget
2019-08-23 22:30   ` Elijah Newren
2019-08-20 15:11 ` [PATCH 2/9] sparse-checkout: create 'init' subcommand Derrick Stolee via GitGitGadget
2019-08-23 23:02   ` Elijah Newren
2019-09-11 14:27     ` Derrick Stolee
2019-09-11 20:28     ` Derrick Stolee
2019-08-20 15:11 ` [PATCH 3/9] clone: add --sparse mode Derrick Stolee via GitGitGadget
2019-08-23 23:17   ` Elijah Newren
2019-09-18 13:51     ` Derrick Stolee
2019-08-20 15:11 ` [PATCH 4/9] sparse-checkout: 'add' subcommand Derrick Stolee via GitGitGadget
2019-08-23 23:30   ` Elijah Newren
2019-09-18 13:55     ` Derrick Stolee
2019-09-18 14:56       ` Elijah Newren
2019-09-18 17:23         ` Derrick Stolee
2019-08-20 15:11 ` [PATCH 5/9] sparse-checkout: create 'disable' subcommand Derrick Stolee via GitGitGadget
2019-08-23 23:50   ` Elijah Newren
2019-08-20 15:11 ` [PATCH 6/9] trace2:experiment: clear_ce_flags_1 Jeff Hostetler via GitGitGadget
2019-08-24  0:08   ` Elijah Newren
2019-08-20 15:11 ` [PATCH 7/9] sparse-checkout: add 'cone' mode Derrick Stolee via GitGitGadget
2019-08-24  0:31   ` Elijah Newren
2019-08-20 15:11 ` [PATCH 8/9] sparse-checkout: use hashmaps for cone patterns Derrick Stolee via GitGitGadget
2019-08-24  4:56   ` Elijah Newren
2019-08-20 15:11 ` [PATCH 9/9] sparse-checkout: init and add in cone mode Derrick Stolee via GitGitGadget
2019-08-24  5:07   ` Elijah Newren
2019-08-21 21:52 ` [PATCH 0/9] [RFC] New sparse-checkout builtin and "cone" mode Elijah Newren
2019-08-22 13:10   ` Derrick Stolee
2019-08-22 14:25     ` Derrick Stolee
2019-08-24  5:40     ` Elijah Newren
2019-08-26 13:29       ` Derrick Stolee
2019-08-26 18:16         ` Elijah Newren
2019-08-26 19:16           ` Derrick Stolee
2019-09-02 17:55       ` Eric Sunshine
2019-09-19 14:43 ` [PATCH v2 00/11] " Derrick Stolee via GitGitGadget
2019-09-19 14:43   ` [PATCH v2 01/11] sparse-checkout: create builtin with 'list' subcommand Derrick Stolee via GitGitGadget
2019-10-05 19:22     ` Elijah Newren
2019-09-19 14:43   ` [PATCH v2 02/11] sparse-checkout: create 'init' subcommand Derrick Stolee via GitGitGadget
2019-10-05 19:34     ` Elijah Newren
2019-09-19 14:43   ` [PATCH v2 03/11] clone: add --sparse mode Derrick Stolee via GitGitGadget
2019-10-05 19:40     ` Elijah Newren
2019-10-07 13:56       ` Derrick Stolee
2019-09-19 14:43   ` [PATCH v2 05/11] sparse-checkout: add '--stdin' option to set subcommand Derrick Stolee via GitGitGadget
2019-09-19 14:43   ` [PATCH v2 04/11] sparse-checkout: 'set' subcommand Derrick Stolee via GitGitGadget
2019-10-05 22:44     ` Elijah Newren
2019-10-06  0:30       ` Elijah Newren
2019-10-07 18:26         ` Derrick Stolee
2019-10-11 22:24           ` Elijah Newren
2019-09-19 14:43   ` [PATCH v2 06/11] sparse-checkout: create 'disable' subcommand Derrick Stolee via GitGitGadget
2019-10-06  4:10     ` Elijah Newren [this message]
2019-10-07 19:12       ` Derrick Stolee
2019-09-19 14:43   ` [PATCH v2 07/11] trace2: add region in clear_ce_flags Jeff Hostetler via GitGitGadget
2019-10-06  4:13     ` Elijah Newren
2019-09-19 14:43   ` [PATCH v2 08/11] sparse-checkout: add 'cone' mode Derrick Stolee via GitGitGadget
2019-10-06  4:22     ` Elijah Newren
2019-10-07 19:15       ` Derrick Stolee
2019-09-19 14:43   ` [PATCH v2 09/11] sparse-checkout: use hashmaps for cone patterns Derrick Stolee via GitGitGadget
2019-09-19 20:59     ` Derrick Stolee
2019-09-20 14:37       ` Derrick Stolee
2019-09-19 14:43   ` [PATCH v2 10/11] sparse-checkout: init and set in cone mode Derrick Stolee via GitGitGadget
2019-09-19 14:43   ` [PATCH v2 11/11] unpack-trees: hash less " Derrick Stolee via GitGitGadget
2019-10-01 13:40   ` [PATCH v2 00/11] New sparse-checkout builtin and "cone" mode Derrick Stolee
2019-10-01 16:54     ` Elijah Newren
2019-10-01 18:15       ` Derrick Stolee
2019-10-03 22:28     ` Junio C Hamano
2019-10-07 20:08   ` [PATCH v3 00/17] " Derrick Stolee via GitGitGadget
2019-10-07 20:08     ` [PATCH v3 01/17] sparse-checkout: create builtin with 'list' subcommand Derrick Stolee via GitGitGadget
2019-10-11 22:01       ` Elijah Newren
2019-10-07 20:08     ` [PATCH v3 02/17] sparse-checkout: create 'init' subcommand Derrick Stolee via GitGitGadget
2019-10-11 22:14       ` Elijah Newren
2019-10-14 20:22         ` Derrick Stolee
2019-10-07 20:08     ` [PATCH v3 03/17] clone: add --sparse mode Derrick Stolee via GitGitGadget
2019-10-11 22:20       ` Elijah Newren
2019-10-07 20:08     ` [PATCH v3 04/17] sparse-checkout: 'set' subcommand Derrick Stolee via GitGitGadget
2019-10-11 22:26       ` Elijah Newren
2019-10-11 22:30         ` Elijah Newren
2019-10-07 20:08     ` [PATCH v3 05/17] sparse-checkout: add '--stdin' option to set subcommand Derrick Stolee via GitGitGadget
2019-10-11 22:27       ` Elijah Newren
2019-10-14 20:28         ` Derrick Stolee
2019-10-07 20:08     ` [PATCH v3 06/17] sparse-checkout: create 'disable' subcommand Derrick Stolee via GitGitGadget
2019-10-07 20:08     ` [PATCH v3 07/17] trace2: add region in clear_ce_flags Jeff Hostetler via GitGitGadget
2019-10-07 20:08     ` [PATCH v3 08/17] sparse-checkout: add 'cone' mode Derrick Stolee via GitGitGadget
2019-10-07 20:08     ` [PATCH v3 09/17] sparse-checkout: use hashmaps for cone patterns Derrick Stolee via GitGitGadget
2019-10-07 20:08     ` [PATCH v3 10/17] sparse-checkout: init and set in cone mode Derrick Stolee via GitGitGadget
2019-10-07 20:08     ` [PATCH v3 11/17] unpack-trees: hash less " Derrick Stolee via GitGitGadget
2019-10-07 20:08     ` [PATCH v3 12/17] unpack-trees: add progress to clear_ce_flags() Derrick Stolee via GitGitGadget
2019-10-07 20:08     ` [PATCH v3 13/17] read-tree: show progress by default Derrick Stolee via GitGitGadget
2019-10-12 22:16       ` Elijah Newren
2019-10-14 20:31         ` Derrick Stolee
2019-10-07 20:08     ` [PATCH v3 14/17] sparse-checkout: sanitize for nested folders Derrick Stolee via GitGitGadget
2019-10-07 20:08     ` [PATCH v3 15/17] sparse-checkout: update working directory in-process Derrick Stolee via GitGitGadget
2019-10-12 22:57       ` Elijah Newren
2019-10-14 20:39         ` Derrick Stolee
2019-10-07 20:08     ` [PATCH v3 16/17] sparse-checkout: write using lockfile Derrick Stolee via GitGitGadget
2019-10-12 22:59       ` Elijah Newren
2019-10-14 20:41         ` Derrick Stolee
2019-10-07 20:08     ` [PATCH v3 17/17] sparse-checkout: cone mode should not interact with .gitignore Derrick Stolee via GitGitGadget
2019-10-12 23:00       ` Elijah Newren
2019-10-12 23:22     ` [PATCH v3 00/17] New sparse-checkout builtin and "cone" mode Elijah Newren
2019-10-15 13:55     ` [PATCH v4 " Derrick Stolee via GitGitGadget
2019-10-15 13:55       ` [PATCH v4 01/17] sparse-checkout: create builtin with 'list' subcommand Derrick Stolee via GitGitGadget
2019-10-16 19:00         ` Elijah Newren
2019-10-21 12:10           ` Derrick Stolee
2019-10-18 16:07         ` SZEDER Gábor
2019-10-21 11:42           ` Derrick Stolee
2019-10-15 13:55       ` [PATCH v4 02/17] sparse-checkout: create 'init' subcommand Derrick Stolee via GitGitGadget
2019-10-15 13:55       ` [PATCH v4 03/17] clone: add --sparse mode Derrick Stolee via GitGitGadget
2019-10-15 13:55       ` [PATCH v4 04/17] sparse-checkout: 'set' subcommand Derrick Stolee via GitGitGadget
2019-10-15 13:55       ` [PATCH v4 05/17] sparse-checkout: add '--stdin' option to set subcommand Derrick Stolee via GitGitGadget
2019-10-15 13:55       ` [PATCH v4 06/17] sparse-checkout: create 'disable' subcommand Derrick Stolee via GitGitGadget
2019-10-18 16:31         ` SZEDER Gábor
2019-10-15 13:55       ` [PATCH v4 07/17] trace2: add region in clear_ce_flags Jeff Hostetler via GitGitGadget
2019-10-15 13:55       ` [PATCH v4 08/17] sparse-checkout: add 'cone' mode Derrick Stolee via GitGitGadget
2019-10-15 13:55       ` [PATCH v4 09/17] sparse-checkout: use hashmaps for cone patterns Derrick Stolee via GitGitGadget
2019-10-18 15:31         ` SZEDER Gábor
2019-10-21 11:44           ` Derrick Stolee
2019-10-15 13:55       ` [PATCH v4 10/17] sparse-checkout: init and set in cone mode Derrick Stolee via GitGitGadget
2019-10-15 13:55       ` [PATCH v4 11/17] unpack-trees: hash less " Derrick Stolee via GitGitGadget
2019-10-15 13:55       ` [PATCH v4 12/17] unpack-trees: add progress to clear_ce_flags() Derrick Stolee via GitGitGadget
2019-10-15 13:56       ` [PATCH v4 13/17] read-tree: show progress by default Derrick Stolee via GitGitGadget
2019-10-15 13:56       ` [PATCH v4 14/17] sparse-checkout: sanitize for nested folders Derrick Stolee via GitGitGadget
2019-10-15 13:56       ` [PATCH v4 15/17] sparse-checkout: update working directory in-process Derrick Stolee via GitGitGadget
2019-10-18 20:24         ` SZEDER Gábor
2019-10-18 20:40           ` SZEDER Gábor
2019-10-21 11:59             ` Derrick Stolee
2019-10-15 13:56       ` [PATCH v4 16/17] sparse-checkout: write using lockfile Derrick Stolee via GitGitGadget
2019-10-15 13:56       ` [PATCH v4 17/17] sparse-checkout: cone mode should not interact with .gitignore Derrick Stolee via GitGitGadget
2019-10-16 20:07       ` [PATCH v4 00/17] New sparse-checkout builtin and "cone" mode Elijah Newren
2019-10-17 23:53       ` Jon Simons
2019-10-21 12:08         ` Derrick Stolee
2019-10-21 13:56       ` [PATCH v5 " Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 01/17] sparse-checkout: create builtin with 'list' subcommand Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 02/17] sparse-checkout: create 'init' subcommand Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 03/17] clone: add --sparse mode Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 04/17] sparse-checkout: 'set' subcommand Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 05/17] sparse-checkout: add '--stdin' option to set subcommand Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 06/17] sparse-checkout: create 'disable' subcommand Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 07/17] trace2: add region in clear_ce_flags Jeff Hostetler via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 08/17] sparse-checkout: add 'cone' mode Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 09/17] sparse-checkout: use hashmaps for cone patterns Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 10/17] sparse-checkout: init and set in cone mode Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 11/17] unpack-trees: hash less " Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 12/17] unpack-trees: add progress to clear_ce_flags() Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 13/17] read-tree: show progress by default Derrick Stolee via GitGitGadget
2019-10-21 15:04           ` Phillip Wood
2019-10-21 15:14             ` Derrick Stolee
2019-10-23  3:48               ` Junio C Hamano
2019-10-23 12:50                 ` Derrick Stolee
2019-10-24 10:18                   ` Phillip Wood
2019-10-24 10:18                 ` Phillip Wood
2019-10-21 13:56         ` [PATCH v5 14/17] sparse-checkout: sanitize for nested folders Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 15/17] sparse-checkout: update working directory in-process Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 16/17] sparse-checkout: write using lockfile Derrick Stolee via GitGitGadget
2019-10-21 13:56         ` [PATCH v5 17/17] sparse-checkout: cone mode should not interact with .gitignore Derrick Stolee via GitGitGadget
2019-10-23  3:52         ` [PATCH v5 00/17] New sparse-checkout builtin and "cone" mode Junio C Hamano

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Example config snippet for mirrors

Newsgroups are available over NNTP:
	nntp://news.public-inbox.org/inbox.comp.version-control.git
	nntp://ou63pmih66umazou.onion/inbox.comp.version-control.git
	nntp://czquwvybam4bgbro.onion/inbox.comp.version-control.git
	nntp://hjrcffqmbrq6wope.onion/inbox.comp.version-control.git
	nntp://news.gmane.org/gmane.comp.version-control.git

 note: .onion URLs require Tor: https://www.torproject.org/

AGPL code for this site: git clone https://public-inbox.org/public-inbox.git