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From: Junio C Hamano <gitster@pobox.com>
To: "Carlo Marcelo Arenas Belón" <carenas@gmail.com>
Cc: git@vger.kernel.org, avarab@gmail.com, sunshine@sunshineco.com
Subject: Re: [PATCH v2 1/2] ci: make failure to find perforce more user friendly
Date: Thu, 21 Apr 2022 22:49:16 -0700	[thread overview]
Message-ID: <xmqqo80td5wj.fsf@gitster.g> (raw)
In-Reply-To: <20220422013911.7646-2-carenas@gmail.com> ("Carlo Marcelo Arenas =?utf-8?Q?Bel=C3=B3n=22's?= message of "Thu, 21 Apr 2022 18:39:10 -0700")

Carlo Marcelo Arenas Belón  <carenas@gmail.com> writes:

> In preparation for a future change that will make perforce installation
> optional in macOS, make sure that the check for it is done without
> triggering scary looking errors and add a user friendly message instead.
>
> Only one invocation of type is changed as that is what is only needed
> for the expected future use case, and because `type` is recommended in
> the CodingGuidelines, so changing that recommendation or a more complex
> change has been specifically punted.

This may be in the "POSIX may say this but the real world may not
work that way" territory.  As far as I can tell, "command -v" [*1*]
and "type" [*2*] both ought to give diagnostic messages to their
standard error stream, and they both should signal an error with
non-zero exit status.  It may be that the shell implementation you
have tried had "command -v" that is less noisy than "type" when
given a command that is not installed, but I wonder if the next
shell implementation you find has "command -v" that is as noisy and
scary as "type", in which case this patch amounts to a no-op.

I wonder if "type p4d >/dev/null 2>/dev/null" (or "command -v" with
the same) is a more futureproof fix.


[References]

*1* https://pubs.opengroup.org/onlinepubs/9699919799/utilities/command.html
*2* https://pubs.opengroup.org/onlinepubs/9699919799/utilities/type.html

> Helped-by: Eric Sunshine <sunshine@sunshineco.com>
> Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
> ---
>  ci/install-dependencies.sh | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/ci/install-dependencies.sh b/ci/install-dependencies.sh
> index dbcebad2fb2..6de20108775 100755
> --- a/ci/install-dependencies.sh
> +++ b/ci/install-dependencies.sh
> @@ -78,12 +78,14 @@ linux-gcc-default)
>  	;;
>  esac
>  
> -if type p4d >/dev/null && type p4 >/dev/null
> +if command -v p4d >/dev/null && type p4 >/dev/null
>  then
>  	echo "$(tput setaf 6)Perforce Server Version$(tput sgr0)"
>  	p4d -V | grep Rev.
>  	echo "$(tput setaf 6)Perforce Client Version$(tput sgr0)"
>  	p4 -V | grep Rev.
> +else
> +	echo "WARNING: perforce wasn't installed, see above for clues why"
>  fi
>  if type git-lfs >/dev/null
>  then

  reply	other threads:[~2022-04-22  5:49 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-21 22:55 [PATCH] ci: make perforce installation optional in macOS Carlo Marcelo Arenas Belón
2022-04-21 22:58 ` Eric Sunshine
2022-04-21 23:05 ` Eric Sunshine
2022-04-22  1:39 ` [PATCH v2 0/2] ci: avoid perforce/brew issues affecting macOS Carlo Marcelo Arenas Belón
2022-04-22  1:39   ` [PATCH v2 1/2] ci: make failure to find perforce more user friendly Carlo Marcelo Arenas Belón
2022-04-22  5:49     ` Junio C Hamano [this message]
2022-04-22 22:23       ` Junio C Hamano
2022-04-22 23:13         ` Carlo Arenas
2022-04-22 23:58           ` Junio C Hamano
2022-04-23  0:37             ` Carlo Arenas
2022-04-22  1:39   ` [PATCH v2 2/2] ci: make perforce installation optional in macOS Carlo Marcelo Arenas Belón
2022-04-23 14:25   ` [PATCH v3 0/4] ci: avoid perforce/brew issues affecting macOS Carlo Marcelo Arenas Belón
2022-04-23 14:25     ` [PATCH v3 1/4] ci: make failure to find perforce more user friendly Carlo Marcelo Arenas Belón
2022-04-26  1:12       ` Junio C Hamano
2022-04-23 14:25     ` [PATCH v3 2/4] ci: avoid brew for installing perforce Carlo Marcelo Arenas Belón
2022-04-24  6:43       ` Eric Sunshine
2022-04-26 15:55       ` Johannes Schindelin
2022-04-26 17:07         ` Carlo Arenas
2022-04-23 14:25     ` [PATCH v3 3/4] ci: reintroduce prevention from perforce being quarantined in macOS Carlo Marcelo Arenas Belón
2022-04-24  6:47       ` Eric Sunshine
2022-04-23 14:25     ` [PATCH v3 4/4] CI: use https, not http to download binaries from perforce.com Carlo Marcelo Arenas Belón
2022-05-12 22:39     ` [PATCH v4 0/4] ci: avoid perforce/brew issues affecting macOS Junio C Hamano
2022-05-12 22:39       ` [PATCH v4 1/4] ci: make failure to find perforce more user friendly Junio C Hamano
2022-05-12 22:39       ` [PATCH v4 2/4] ci: avoid brew for installing perforce Junio C Hamano
2022-05-12 22:39       ` [PATCH v4 3/4] ci: reintroduce prevention from perforce being quarantined in macOS Junio C Hamano
2022-05-12 22:39       ` [PATCH v4 4/4] ci: use https, not http to download binaries from perforce.com Junio C Hamano

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