#!/bin/bash

PREFIX=/home/sora/install
TARGET_TRIPLET=x86_64-w64-mingw32
BINUTILS_TARGETS=x86_64-w64-mingw32,i686-w64-mingw32
HOST_TRIPLET=x86_64-pc-linux-gnu

main(){
	operation="${1:-upgrade}"
	case "$operation" in
		distclean|clean)
			for i in binutils-gdb mingw-w64/mingw-w64-crt mingw-w64/mingw-w64-headers gcc; do
				pushd $i/build >/dev/null 2>&1
				_log "Cleaning $(pwd)..."
				make $operation
				popd >/dev/null 2>&1
			done
			echo "> done"
			;;
		upgrade)
			main update
			main build
			;;
		update)
			_pushd mingw-w64
			_cmd git pull
			_popd
			;;
		build)
			_pushd binutils-gdb/build
			_cmd ../configure --target=${TARGET_TRIPLET} \
				--enable-targets=${BINUTILS_TARGETS} \
				--with-sysroot=${PREFIX} --prefix=${PREFIX}
			_make
			_make install
			_popd

			check_path ${PREFIX}/bin

			_pushd mingw-w64/mingw-w64-headers/build
			_cmd ../configure --build=${BUILD_TRIPLET} \
				--host=${TARGET_TRIPLET} \
				--prefix=${PREFIX}/${TARGET_TRIPLET}
			_make
			_make install
			_popd

			_pushd ${PREFIX}
			if test ! -d ${PREFIX}/mingw; then
				_log "Linking mingw to ${TARGET_TRIPLET}"
				ln -s ${TARGET_TRIPLET} mingw || exit 1
			fi
			_pushd ${TARGET_TRIPLET}
			if test ! -d lib64; then
				_log "Creating lib64 directory"
				mv lib lib64 || exit 1
				ln -s lib64 lib || exit 1
			fi
			_popd
			_popd

			_pushd gcc/build
			_cmd ../configure --target=${TARGET_TRIPLET} \
				--enable-targets=all \
				--prefix=${PREFIX} --with-sysroot=${PREFIX}
			_make all-gcc
			_make install-gcc
			_popd

			_pushd mingw-w64/mingw-w64-crt/build
			_cmd ../configure --host=${TARGET_TRIPLET} \
				--enable-lib32 --with-sysroot=${PREFIX} \
				--prefix=${PREFIX}/${TARGET_TRIPLET}
			_make
			_make install
			_popd

			_pushd gcc/build
			_cmd ../configure --target=${TARGET_TRIPLET} \
				--enable-targets=all \
				--prefix=${PREFIX} --with-sysroot=${PREFIX} \
				--with-build-sysroot=${PREFIX}
			_make
			_make install
			_popd

			_log "Completed jobs"
			echo -n ${message}
	esac
}

_log(){
	for i in $(seq 1 ${dirlevel}); do
		echo -n ">"
	done

	echo " $@..."
}

_cmd(){
	_log "Running $@"
	"$@" || exit 1
}

_make(){
	make "$@" ${MAKEOPTS} || exit 1
}

_pushd(){
	_log "Entering $(pwd)/$@"
	dirlevel=$(( $dirlevel + 1 ))

	test -d "$@" || mkdir "$@" || exit 1
	pushd "$@" >/dev/null 2>&1
}

_popd(){
	dirlevel=$(( $dirlevel - 1 ))
	_log "Exiting $(pwd)"
	popd "$@" >/dev/null 2>&1
}

check_path(){
	if [[ $PATH == *:$1:* || $PATH == $1:* || $PATH == *:$1 ]]; then
		: #do nothing
	else
		_log "Adding $1 into temporary \$PATH"
		PATH="$1:$PATH"
		add_msg "You must add $1 into \$PATH to use mingw."
		add_msg "Like this:"
		add_msg "	PATH=$1:\$PATH"
		add_msg ""
	fi
}

add_msg(){
	message="${message}$@${newline}"
}

newline='
'
dirlevel=1
message=
main "$@"