RE: [RFC/PATCH 3/4] test-lib: provide lazy TIME_COMMAND prereq

> From: Michael J Gruber [mailto:git@drmicha.warpmail.net]
> Sent: Tuesday, October 16, 2012 1:40 PM
> To: git@vger.kernel.org
> Cc: Joachim Schmitz; Junio C Hamano
> Subject: [RFC/PATCH 3/4] test-lib: provide lazy TIME_COMMAND prereq
> 
> Some test want to use the time command (not the shell builtin) and test
> for its availability at /usr/bin/time.
> 
> Provide a lazy prereq TIME_COMMAND which tests for /usr/bin/time and
> /bin/time. If any is found, set TEST_COMMAND_PATH to the first match.
> 
> Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net>
> ---
> Rather than iterating over 2 or more hardcoded paths, one could use
> "test -P time" or allow a make variable TIME_COMMAND_PATH whose

> executability is checked by the prereq. I really don't know what's best.
> 
>  t/test-lib.sh | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/t/test-lib.sh b/t/test-lib.sh
> index 489bc80..7977c15 100644
> --- a/t/test-lib.sh
> +++ b/t/test-lib.sh
> @@ -738,6 +738,13 @@ test_lazy_prereq UTF8_NFD_TO_NFC '
>  	esac
>  '
> 
> +test_lazy_prereq TIME_COMMAND '
> +	for command in /usr/bin/time /bin/time
> +	do
> +		test -x "$command" && break
> +	done && TIME_COMMAND_PATH="$command"
> +'
> +
>  # When the tests are run as root, permission tests will report that
>  # things are writable when they shouldn't be.
>  test -w / || test_set_prereq SANITY
> --
> 1.8.0.rc2.304.g9f3ac5c