iso2chd - Bash script to convert ISO to CHD

iso2chd.sh

#!/bin/bash

if [ -z "$1" ]; then
    echo "Usage: $0 ISO|CUE"
    echo "  Converts input file to same-name CHD"
    exit
fi

if ! [ -x "$(which chdman)" ]; then
    echo "ERROR: Need chdman. Install mame-tools."
    exit
fi

if ! [ -f "$1" ]; then
    echo "ERROR: Input file \"$1\" does not exist"
    exit
fi

INPUT="$1"
#echo "DEBUG: Input  = \"$INPUT\""
TARGET="${INPUT%.*}.chd"
#echo "DEBUG: Target = \"$TARGET\""

if [ -f "$TARGET" ]; then
    echo "ERROR: Output file \"$TARGET\" already exists"
    exit
fi

chdman createcd -i "$INPUT" -o "$TARGET"