Alternative Midipix startup script

midipix.sh

#!/bin/sh

prepend_path() {
	local _pname _pname_prepend="${1}" IFS=":"
	for _pname in ${PATH}; do
		if [ "${_pname}" = "${_pname_prepend}" ]; then
			return
		fi
	done
	export PATH="${_pname_prepend}${PATH:+:${PATH}}"
}

prepend_path "/bin"
export MSYS2_ARG_CONV_EXCL="*"

if [ "${1}" = -h ]; then
	echo "Usage: $0 [path_to_native]"
	exit 0
elif [ ${#} -eq 0 ]; then
	PWD_ABSOLUTE="$(cygpath -am native)" || exit 1
	MIDIPIX_PATH="${PWD_ABSOLUTE%%:*}${PWD_ABSOLUTE#*:}"
	unset PWD_ABSOLUTE
elif [ ${#} -eq 1 ]; then
	MIDIPIX_PATH="${1}"
else
	echo "Usage: $0 [path_to_native]"
	exit 6
fi
if [ "${MIDIPIX_PATH#*[ 	]*}" != "${MIDIPIX_PATH}" ]; then
	echo "Error: path_to_native must not contain spaces nor tabs."
	exit 3
fi
MIDIPIX_PATH=${MIDIPIX_PATH#/}
MIDIPIX_PATH=${MIDIPIX_PATH%/}
if [ ! -f "/proc/cygdrive/${MIDIPIX_PATH}/bin/ntctty.exe" ]; then
	echo "Error: Midipix path invalid. Could not find '/${MIDIPIX_PATH}/bin/ntctty.exe'."
	exit 4
else
	if [ -f "/proc/cygdrive/${MIDIPIX_PATH}/bin/libpsxscl.log" ]; then
		echo "Found libpsxscl.log, copying to /${MIDIPIX_PATH}/libpsxscl.last."
		mv "/proc/cygdrive/${MIDIPIX_PATH}/bin/libpsxscl.log" "/proc/cygdrive/${MIDIPIX_PATH}/libpsxscl.last" || exit 5
	fi
	echo "Midipix native root: /${MIDIPIX_PATH}"
	mintty -h always -e /bin/sh -c "
		set -o errexit
		stty raw -echo
		cd /proc/cygdrive/${MIDIPIX_PATH}/bin
		export PATH=/proc/cygdrive/${MIDIPIX_PATH}/bin:/proc/cygdrive/${MIDIPIX_PATH}/lib
		./ntctty.exe -e chroot //${MIDIPIX_PATH} /bin/bash" &
fi