annotate cpack/dml/scripts/compression/bufs @ 0:718306e29690 tip

commiting public release

#!/bin/sh
if [ $# -lt 3 ]; then
	echo 'bufs <n:int> <command> <arg1> <arg2> ...'
	echo
	echo 'Apply command to arguments but buffering the nth argument'
	echo 'of command (ie (n+1)th argument of strm) into a temporary file.'
	echo 'This means that the nth argument can safely be replaced with'
	echo 'a bash process redirection.'
	exit 1
fi
set -o nounset
set -e

function str1 {
	cmd="$1"
	arg1="$2"
	tmp=`mktemp -t strXXX`
	# echo created $tmp 1>&2
	trap "rm -f $tmp; exit" INT KILL EXIT
	shift 2
	(cat "$arg1" > $tmp) && $cmd $tmp "$@"
}

function str {
	pos=$1
	shift 1
	if [ $pos -eq 1 ]; then
		str1 "$@"
	else
		cmd="$1 $2"
		shift 2
		str $(($pos-1)) "$cmd" "$@"
	fi
}
str "$@"