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#!/bin/sh
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#
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prepend_path() {
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	local _pname _pname_prepend="${1}" IFS=":";
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	for _pname in ${PATH}; do
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		if [ "${_pname}" = "${_pname_prepend}" ]; then
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			return;
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		fi;
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	done; export PATH="${_pname_prepend}${PATH:+:${PATH}}";
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};
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convert_links_ask() {
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	local _ _link_name _link_target;
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	echo "Warning: ${MIDIPIX_PATH}/native/lib contains shared objects (library"
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	echo "images) that are symbolic links. This is not supported by Midipix at"
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	echo "present and commonly occurs if the binary distribution tarball was"
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	echo "extracted by an application that does not support symbolic links"
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	echo "correctly. This also occurs when a binary distribution was built locally."
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	printf "Convert all shared object symbolic links to hard links? (y|N) ";
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	read _;
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	case "${_}" in
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		[yY])	break; ;;
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		*)	echo "Exiting."; exit 6; ;;
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	esac;
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	for _link_name in $(find ${MIDIPIX_PATH}/native/lib		\
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			-maxdepth 1 -name \*.so -type l); do
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		_link_target="$(readlink -- "${_link_name}")";
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		if [ -f "${MIDIPIX_PATH}/native/lib/${_link_target}" ]; then
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			echo rm -f -- "${_link_name}";
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			rm -f -- "${_link_name}";
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			echo ln -f -- "${_link_target}" "${_link_name}";
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			ln -f -- "${_link_target}" "${_link_name}";
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		fi;
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	done;
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};
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check_prereq_files() {
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	local _fname;
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	for _fname in	${MIDIPIX_DNAME_ROOT}/bin/ntctty.exe		\
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			${MIDIPIX_DNAME_ROOT}/bin/chroot		\
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			${MIDIPIX_DNAME_ROOT}/bin/env			\
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			${MIDIPIX_DNAME_ROOT}/bin/bash; do
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		if [ ! -e ${MIDIPIX_PATH}/${_fname} ]; then
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			return 1;
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		fi;
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	done;
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};
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prepend_path /bin;
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while [ ${#} -gt 0 ]; do
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	if [ "${1}" = -h ]; then
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		echo "usage: $0 [-h] [-l] [-m] [Cygwin pathname to Midipix root]";
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		echo "       -l: tail(1) -f libpsxscl.log";
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		echo "       -m: use Minipix root";
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		exit 0;
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	elif [ "${1}" = -l ]; then
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		ARG_TAILF_LOG=1; shift;
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	elif [ "${1}" = -m ]; then
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		ARG_MINIPIX=1; shift;
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		MIDIPIX_DNAME_ROOT=minipix;
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	elif [ "${1#-}" = "${1}" ]; then
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		MIDIPIX_PATH="${1}";
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	fi;
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done;
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if [ -z "${MIDIPIX_PATH}" ]; then
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	MIDIPIX_PATH="$(cygpath -am .)" || exit 1;
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fi;
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UNAME_OS="$(uname -o)" || exit 2;
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if [ "${MIDIPIX_PATH#*[ 	]*}" != "${MIDIPIX_PATH}" ]; then
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	echo "Error: drive_letter/dirname must not contain SP (\` ') or VT (\`\\\t') characters.";
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	exit 3;
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elif [ ! -d ${MIDIPIX_PATH} ]; then
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	echo "Error: Midipix path non-existent or invalid (\`${MIDIPIX_PATH}'.)";
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	exit 4;
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elif [ -z "${MIDIPIX_DNAME_ROOT}" ]; then
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	if [ -e ${MIDIPIX_PATH}/native ]; then
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		MIDIPIX_DNAME_ROOT=native;
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	elif [ -e ${MIDIPIX_PATH}/minipix ]; then
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		MIDIPIX_DNAME_ROOT=minipix;
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	else
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		echo "Error: neither \`${MIDIPIX_PATH}/native' nor \`${MIDIPIX_PATH}/minipix' exist.";
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		exit 5;
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	fi;
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fi;
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if [ \( "${ARG_MINIPIX:-0}" -eq 0 \) -a				\
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		\( -n "${NATIVE_LIB_LINKS:=$(find ${MIDIPIX_PATH}/native/lib -maxdepth 1 -name \*.so -type l -print -quit)}" \) ]; then
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	convert_links_ask || exit 7;
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else
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	check_prereq_files || exit 8;
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	if [ -f ${MIDIPIX_PATH}/libpsxscl.log ]; then
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		echo Found libpsxscl.log, copying to ${MIDIPIX_PATH}/libpsxscl.last.
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		cp -p -- ${MIDIPIX_PATH}/libpsxscl.log			\
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			${MIDIPIX_PATH}/libpsxscl.last || exit 9;
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	fi;
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	echo "Absolute Midipix pathname: ${MIDIPIX_PATH}";
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	if [ "${UNAME_OS}" = "Msys" ]; then
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		export MSYS2_ARG_CONV_EXCL="*";
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	fi;
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	mintty -h always -s 120,80 -e /bin/sh -c "
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		set -o errexit; stty raw -echo;
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		cd ${MIDIPIX_PATH};					\
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		env PATH=${MIDIPIX_PATH}/${MIDIPIX_DNAME_ROOT}/lib	\
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		${MIDIPIX_DNAME_ROOT}/bin/ntctty.exe -e			\
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			chroot ${MIDIPIX_DNAME_ROOT}			\
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			/bin/env PATH=/bin:/lib				\
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			bash" &
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	sleep 0.25;
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	NTCTTY_PID="$(ps -W | awk '$NF ~ /ntctty\.exe$/{print $1}')";
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	echo "ntctty PID               : ${NTCTTY_PID}";
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	if [ ${ARG_TAILF_LOG:-0} -eq 1 ]; then
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		tail -f ${MIDIPIX_PATH}/${MIDIPIX_DNAME_ROOT}/bin/libpsxscl.log;
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	fi;
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fi;