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a/ohbuild.sh b/ohbuild.sh
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{
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{
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    fatal "Usage: ohbuild.sh <topdir>"
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    fatal "Usage: ohbuild.sh <topdir>"
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}
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}
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test $# = 1 || usage
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test $# = 1 || usage
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topdir=$1
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topdir=$1
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test -d $topdir || mkdir $topdir || fatal "Can't create $topdir"
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cd $topdir || exit 1
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cd $topdir || exit 1
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topdir=`pwd`
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topdir=`pwd`
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