From: Taylor Blau <me@ttaylorr.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>,
Derrick Stolee <dstolee@microsoft.com>,
Jeff Hostetler <git@jeffhostetler.com>,
Patrick Steinhardt <ps@pks.im>, Jeff King <peff@peff.net>
Subject: Re: [PATCH v3 3/5] read-cache & fetch-negotiator: check "enum" values in switch()
Date: Mon, 20 Sep 2021 18:14:44 -0400 [thread overview]
Message-ID: <YUkH1LSa1WcFDmvr@nand.local> (raw)
In-Reply-To: <patch-v3-3.5-d837d905825-20210919T084703Z-avarab@gmail.com>
On Sun, Sep 19, 2021 at 10:47:17AM +0200, Ævar Arnfjörð Bjarmason wrote:
> Change tweak_untracked_cache() in "read-cache.c" to use a switch() to
> have the compiler assert that we checked all possible values in the
> "enum untracked_cache_setting" type, and likewise remove the "default"
> case in fetch_negotiator_init() in favor of checking for
> "FETCH_NEGOTIATION_UNSET" and "FETCH_NEGOTIATION_NONE".
>
> As will be discussed in a subsequent we'll only ever have either of
s/subsequent/& patch/ ?
> these set to FETCH_NEGOTIATION_NONE, FETCH_NEGOTIATION_UNSET and
> UNTRACKED_CACHE_UNSET within the prepare_repo_settings() function
> itself. In preparation for fixing that code let's add a BUG() here to
> mark this as unreachable code.
>
> See ad0fb659993 (repo-settings: parse core.untrackedCache, 2019-08-13)
> for when the "unset" and "keep" handling for core.untrackedCache was
> consolidated, and aaf633c2ad1 (repo-settings: create
> feature.experimental setting, 2019-08-13) for the addition of the
> "default" pattern in "fetch-negotiator.c".
>
> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
> ---
> fetch-negotiator.c | 4 +++-
> read-cache.c | 15 ++++++++++-----
> 2 files changed, 13 insertions(+), 6 deletions(-)
>
> diff --git a/fetch-negotiator.c b/fetch-negotiator.c
> index 57ed5784e14..237f92b8696 100644
> --- a/fetch-negotiator.c
> +++ b/fetch-negotiator.c
> @@ -19,8 +19,10 @@ void fetch_negotiator_init(struct repository *r,
> return;
>
> case FETCH_NEGOTIATION_DEFAULT:
> - default:
> default_negotiator_init(negotiator);
> return;
> + case FETCH_NEGOTIATION_NONE:
> + case FETCH_NEGOTIATION_UNSET:
> + BUG("FETCH_NEGOTIATION_UNSET only in prepare_repo_settings()");
I was briefly confused why this BUG message mentioned
FETCH_NEGOTIATION_UNSET, since we only support FETCH_NEGOTIATION_DEFAULT
here.
But then I realized that it said "only in prepare_repo_settings()", and
we're in fetch_negotiator_init(). So this makes sense to me.
Other than the small typo in the patch message, this looks good to me.
Thanks,
Taylor
next prev parent reply other threads:[~2021-09-21 2:20 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-16 18:30 [PATCH v2 0/5] repo-settings.c: refactor for clarity, get rid of hacks etc Ævar Arnfjörð Bjarmason
2021-09-16 18:30 ` [PATCH v2 1/5] wrapper.c: add x{un,}setenv(), and use xsetenv() in environment.c Ævar Arnfjörð Bjarmason
2021-09-17 16:57 ` Junio C Hamano
2021-09-17 19:18 ` Ævar Arnfjörð Bjarmason
2021-09-16 18:30 ` [PATCH v2 2/5] environment.c: remove test-specific "ignore_untracked..." variable Ævar Arnfjörð Bjarmason
2021-09-17 17:19 ` Junio C Hamano
2021-09-16 18:30 ` [PATCH v2 3/5] read-cache & fetch-negotiator: check "enum" values in switch() Ævar Arnfjörð Bjarmason
2021-09-17 19:30 ` Junio C Hamano
2021-09-16 18:30 ` [PATCH v2 4/5] repo-settings.c: simplify the setup Ævar Arnfjörð Bjarmason
2021-09-16 18:30 ` [PATCH v2 5/5] repository.h: don't use a mix of int and bitfields Ævar Arnfjörð Bjarmason
2021-09-19 8:47 ` [PATCH v3 0/5] repo-settings.c: refactor for clarity, get rid of hacks etc Ævar Arnfjörð Bjarmason
2021-09-19 8:47 ` [PATCH v3 1/5] wrapper.c: add x{un,}setenv(), and use xsetenv() in environment.c Ævar Arnfjörð Bjarmason
2021-09-20 21:53 ` Taylor Blau
2021-09-20 23:17 ` Ævar Arnfjörð Bjarmason
2021-09-19 8:47 ` [PATCH v3 2/5] environment.c: remove test-specific "ignore_untracked..." variable Ævar Arnfjörð Bjarmason
2021-09-20 22:10 ` Taylor Blau
2021-09-20 23:27 ` Ævar Arnfjörð Bjarmason
2021-09-19 8:47 ` [PATCH v3 3/5] read-cache & fetch-negotiator: check "enum" values in switch() Ævar Arnfjörð Bjarmason
2021-09-20 22:14 ` Taylor Blau [this message]
2021-09-20 23:33 ` Ævar Arnfjörð Bjarmason
2021-09-19 8:47 ` [PATCH v3 4/5] repo-settings.c: simplify the setup Ævar Arnfjörð Bjarmason
2021-09-20 12:42 ` Derrick Stolee
2021-09-20 22:18 ` Taylor Blau
2021-09-19 8:47 ` [PATCH v3 5/5] repository.h: don't use a mix of int and bitfields Ævar Arnfjörð Bjarmason
2021-09-20 22:25 ` Taylor Blau
2021-09-21 13:12 ` [PATCH v4 0/5] repo-settings.c: refactor for clarity, get rid of hacks etc Ævar Arnfjörð Bjarmason
2021-09-21 13:12 ` [PATCH v4 1/5] wrapper.c: add x{un,}setenv(), and use xsetenv() in environment.c Ævar Arnfjörð Bjarmason
2021-09-21 13:13 ` [PATCH v4 2/5] environment.c: remove test-specific "ignore_untracked..." variable Ævar Arnfjörð Bjarmason
2021-09-21 13:13 ` [PATCH v4 3/5] read-cache & fetch-negotiator: check "enum" values in switch() Ævar Arnfjörð Bjarmason
2021-09-21 13:13 ` [PATCH v4 4/5] repo-settings.c: simplify the setup Ævar Arnfjörð Bjarmason
2021-09-21 13:13 ` [PATCH v4 5/5] repository.h: don't use a mix of int and bitfields Ævar Arnfjörð Bjarmason
2021-09-21 15:58 ` [PATCH v4 0/5] repo-settings.c: refactor for clarity, get rid of hacks etc Derrick Stolee
2021-09-21 20:46 ` Taylor Blau
2021-09-22 20:23 ` Junio C Hamano
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