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test-lib: skip test with COLUMNS=1 under mksh

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mksh does not allow $COLUMNS to be set below 12.  mksh(1) says that
$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=10 python -c 'import os; print os.environ["COLUMNS"]'
    98

Add a test prerequisite by checking if we can set COLUMNS=1, to allow
us to skip tests that needs it.

Signed-off-by: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2012-04-27 11:25:25 +02:00 committed by Junio C Hamano
parent ba998d33e2
commit b082687cba
1 changed files with 1 additions and 0 deletions
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t/test-lib.sh
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@ -614,6 +614,7 @@ case $(uname -s) in
;;
esac
( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
test -z "$NO_PERL" && test_set_prereq PERL
test -z "$NO_PYTHON" && test_set_prereq PYTHON
test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE