Re: [PATCH] test: skip test with COLUMNS=1 under mksh

From: Junio C Hamano <gitster@pobox.com>
Date: Apr 27, 2012, 16:08 UTC
Message-ID: <xmqqehr99mz3.fsf@junio.mtv.corp.google.com>
In-Reply-To: <1335518725-19728-1-git-send-email-zbyszek@in.waw.pl>

Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> writes:

Show 11 quoted lines

> mksh does not allow $COLUMNS to be set below 12. Quoting mksh(1)
> $COLUMNS is "always set, defaults to 80, unless the value as reported
> by stty(1) is non-zero and sane enough". This applies also to setting
> it directly for one command:
>
> $ COLUMNS=30 python -c 'import os; print os.environ["COLUMNS"]'
> 30
> $ COLUMNS=20 python -c 'import os; print os.environ["COLUMNS"]'
> 20
> $ COLUMNS=10 python -c 'import os; print os.environ["COLUMNS"]'
> 98

I'd hate to say this, but that shell is broken.

> Let's test if we can set COLUMNS=1, and if not, skip the tests that
> want to use that. A prereq is added, which is set if $COLUMNS can be
> set.

And I think that is a sensible workaround, even though COLUMNS_CAN_BE_1 might not be the best name for it.

> +( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1

This is different from what you wrote in your log message, but I trust that it will fail under the problematic shell?

Will queue; thanks.