Re: [PATCH v1 2/2] git-p4: suppress non test relevant output

[Lars Schneider <larsxschneider@gmail.com>]

On 21 Dec 2015, at 21:38, Junio C Hamano <gitster@pobox.com> wrote:

> larsxschneider@gmail.com writes:
> 
>> From: Lars Schneider <larsxschneider@gmail.com>
>> 
>> If tests are executed in verbose mode then the retry logic clutters the
>> test output. Suppress that clutter.
>> 
>> Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
>> ---
>> t/lib-git-p4.sh | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>> 
>> diff --git a/t/lib-git-p4.sh b/t/lib-git-p4.sh
>> index 30bf7ae..03f29c1 100644
>> --- a/t/lib-git-p4.sh
>> +++ b/t/lib-git-p4.sh
>> @@ -174,7 +174,7 @@ retry_until_fail() {
>> 	until ! "$@" 2>/dev/null || test $(time_in_seconds) -gt $timeout
>> 	do
>> 		sleep 1
>> -	done
>> +	done >/dev/null 2>&1
> 
> Eh, what does this squelch?  The sleep in the body of the loop is
> silent, "test A -gt B" on the loop condition would be silent too, so
> you are squelching the invocation of "$@" whose standard error
> stream is already sent to 2>/dev/null?
> 
> If so, why not do it there instead?  You seem to run only "kill" to
> send some signal to a process using this helper function, and it
> would be silent on its standard output stream (even though it may
> say "no such process" etc. on its standard error), so it is not
> clear to me what you are doing with this change here...

If I run git-p4 tests in verbose mode (e.g. "./t9823-git-p4-mock-lfs.sh -v") without this patch then the last lines of the output look like this:

>>> Output Start >>>
expecting success:
	kill_p4d

./lib-git-p4.sh: line 172: 26289 Killed: 9               while true; do
    if test $(time_in_seconds) -gt $timeout; then
        kill -9 $pid; exit 1;
    fi; sleep 1;
done
ok 8 - kill p4d

# passed all 8 test(s)
1..8 
<<< Output end <<<

However, I want them to look like this:

>>> Output Start >>>
expecting success:
	kill_p4d

ok 8 - kill p4d

# passed all 8 test(s)
1..8
<<< Output end <<<

This is achieved with the patch. I am no shell expert ... is there a nicer way to achieve the same?

Thanks,
Lars