#!/bin/bash

#set -x
set -e

TOP_DIR=/opt/m5plus
TOP_BIN_DIR=/opt/m5plus/bin

GCC_PREFIX=arm-none-eabi-
GCC_PREFIX_LN=arm-m5plus-linux-
GCC_VERSION=9-2020-q2
GCC_TAR=gcc-arm-none-eabi-9-2020-q2-update
GCC_TAR_PKG=${GCC_TAR}-x86_64-linux.tar.bz2

GCC_DIR=${TOP_DIR}/${GCC_TAR}
GCC_BIN_DIR=${TOP_DIR}/${GCC_TAR}/bin

if [ -z "$1" ]; then
	echo "CROSS_COMPILER_PATH=$GCC_BIN_DIR"
	if [ -f $GCC_DIR/version ]; then
		if [ -n "`grep ${GCC_VERSION} $GCC_DIR/version`" ]; then
			echo "GCC tools has been installed yet!" >&2
			exit 0
		fi
	else
		echo "Do not have version file" >&2
	fi

	eval $0 force
	[ $? == 0 ] && exit 0

	echo "sorry, you must have super privilege!" >&2
	select choose in 'I have root passwd' 'I have sudo privilege' 'Try again' 'Ignore' 'Aboart'
	do
		case $choose in
		*root*)
			su -c "$0 force"
			[ $? == 0 ] && break
			;;
		*sudo*)
			sudo $0 force
			[ $? == 0 ] && break
			;;
		Try*)
			eval $0 force
			[ $? == 0 ] && break
			;;
		Ignore)
			exit 0
			;;
		Aboart)
			exit 1
			;;
		*)
			echo "Invalid select, please try again!" >&2
			continue
			;;
		esac

		echo "Install GCC tools failed!" >&2
	done

	exit 0
fi

mkdir -pv ${TOP_DIR}
[ $? != 0 ] && exit 1

if [ -d ${GCC_DIR} ]; then
	echo "Delete exist directory..." >&2
	rm ${GCC_DIR} -rf
else
	mkdir -pv $GCC_DIR
fi

echo "Extract GCC tools ..." >&2
tar -xjf ${GCC_TAR_PKG} -C $TOP_DIR
[ $? != 0 ] && exit 1


# creat link
mkdir -pv ${TOP_BIN_DIR}
[ $? != 0 ] && exit 1

for file in `ls ${GCC_BIN_DIR}/${GCC_PREFIX}*`; do
       ln `realpath --relative-to=${TOP_BIN_DIR} ${GCC_BIN_DIR}`/${file##*/} ${TOP_BIN_DIR}/${GCC_PREFIX}${file##*${GCC_PREFIX}} -sfv
#       ln `realpath --relative-to=${TOP_BIN_DIR} ${GCC_BIN_DIR}`/${file##*/} ${TOP_BIN_DIR}/${GCC_PREFIX_LN}${file##*${GCC_PREFIX}} -sfv
done


sed -i 's/${GCC_BIN_DIR}[:]//g' /etc/profile
[ $? != 0 ] && exit 1

if [ ! -f ${GCC_DIR}/version ]; then
  echo "${GCC_VERSION}" > ${GCC_DIR}/version
fi

if [ -z "`grep "${TOP_BIN_DIR}" < /etc/profile`" ]; then
		echo "export path ${TOP_BIN_DIR}" >&2
		cat >> /etc/profile << EOF

# `date`
# M5Plus platform tool PATH
export PATH="${TOP_BIN_DIR}:\$PATH"

EOF

	[ $? != 0 ] && exit 1
else
	echo "skip export GCC path" >&2
fi

exit 0