#!/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}}";

};

convert_links_ask() {

	local _ _link_name _link_target;

	echo "Warning: ${MIDIPIX_PATH}/native/lib contains shared objects (library"

	echo "images) that are symbolic links. This is not supported by Midipix at"

	echo "present and commonly occurs if the binary distribution tarball was"

	echo "extracted by an application that does not support symbolic links"

	echo "correctly. This also occurs when a binary distribution was built locally."

	printf "Convert all shared object symbolic links to hard links? (y|N) ";

	read _;

	case "${_}" in

		[yY])	break; ;;

		*)	echo "Exiting."; exit 6; ;;

	esac;

	for _link_name in $(find ${MIDIPIX_PATH}/native/lib		\

			-maxdepth 1 -name \*.so -type l); do

		_link_target="$(readlink -- "${_link_name}")";

		if [ -f "${MIDIPIX_PATH}/native/lib/${_link_target}" ]; then

			echo rm -f -- "${_link_name}";

			rm -f -- "${_link_name}";

			echo ln -f -- "${_link_target}" "${_link_name}";

			ln -f -- "${_link_target}" "${_link_name}";

		fi;

	done;

};

check_prereq_files() {

	local _fname;

	for _fname in	${MIDIPIX_DNAME_ROOT}/bin/ntctty.exe		\

			${MIDIPIX_DNAME_ROOT}/bin/chroot		\

			${MIDIPIX_DNAME_ROOT}/bin/env			\

			${MIDIPIX_DNAME_ROOT}/bin/bash; do

		if [ ! -e ${MIDIPIX_PATH}/${_fname} ]; then

			return 1;

		fi;

	done;

};

prepend_path /bin;

while [ ${#} -gt 0 ]; do

	if [ "${1}" = -h ]; then

		echo "usage: $0 [-h] [-l] [-m] [Cygwin pathname to Midipix root]";

		echo "       -l: tail(1) -f libpsxscl.log";

		echo "       -m: use Minipix root";

		exit 0;

	elif [ "${1}" = -l ]; then

		ARG_TAILF_LOG=1; shift;

	elif [ "${1}" = -m ]; then

		ARG_MINIPIX=1; shift;

		MIDIPIX_DNAME_ROOT=minipix;

	elif [ "${1#-}" = "${1}" ]; then

		MIDIPIX_PATH="${1}";

	fi;

done;

if [ -z "${MIDIPIX_PATH}" ]; then

	MIDIPIX_PATH="$(cygpath -am .)" || exit 1;

fi;

UNAME_OS="$(uname -o)" || exit 2;

if [ "${MIDIPIX_PATH#*[ 	]*}" != "${MIDIPIX_PATH}" ]; then

	echo "Error: drive_letter/dirname must not contain SP (\` ') or VT (\`\\\t') characters.";

	exit 3;

elif [ ! -d ${MIDIPIX_PATH} ]; then

	echo "Error: Midipix path non-existent or invalid (\`${MIDIPIX_PATH}'.)";

	exit 4;

elif [ -z "${MIDIPIX_DNAME_ROOT}" ]; then

	if [ -e ${MIDIPIX_PATH}/native ]; then

		MIDIPIX_DNAME_ROOT=native;

	elif [ -e ${MIDIPIX_PATH}/minipix ]; then

		MIDIPIX_DNAME_ROOT=minipix;

	else

		echo "Error: neither \`${MIDIPIX_PATH}/native' nor \`${MIDIPIX_PATH}/minipix' exist.";

		exit 5;

	fi;

fi;

if [ \( "${ARG_MINIPIX:-0}" -eq 0 \) -a				\

		\( -n "${NATIVE_LIB_LINKS:=$(find ${MIDIPIX_PATH}/native/lib -maxdepth 1 -name \*.so -type l -print -quit)}" \) ]; then

	convert_links_ask || exit 7;

else

	check_prereq_files || exit 8;

	if [ -f ${MIDIPIX_PATH}/libpsxscl.log ]; then

		echo Found libpsxscl.log, copying to ${MIDIPIX_PATH}/libpsxscl.last.

		cp -p -- ${MIDIPIX_PATH}/libpsxscl.log			\

			${MIDIPIX_PATH}/libpsxscl.last || exit 9;

	fi;

	echo "Absolute Midipix pathname: ${MIDIPIX_PATH}";

	if [ "${UNAME_OS}" = "Msys" ]; then

		export MSYS2_ARG_CONV_EXCL="*";

	fi;

	mintty -h always -s 120,80 -e /bin/sh -c "

		set -o errexit; stty raw -echo;

		cd ${MIDIPIX_PATH};					\

		env PATH=${MIDIPIX_PATH}/${MIDIPIX_DNAME_ROOT}/lib	\

		${MIDIPIX_DNAME_ROOT}/bin/ntctty.exe -e			\

			chroot ${MIDIPIX_DNAME_ROOT}			\

			/bin/env PATH=/bin:/lib				\

			bash" &

	sleep 0.25;

	NTCTTY_PID="$(ps -W | awk '$NF ~ /ntctty\.exe$/{print $1}')";

	echo "ntctty PID               : ${NTCTTY_PID}";

	if [ ${ARG_TAILF_LOG:-0} -eq 1 ]; then

		tail -f ${MIDIPIX_PATH}/${MIDIPIX_DNAME_ROOT}/bin/libpsxscl.log;

	fi;

fi;