#!/bin/bash
#   Copyright 2014 Wolfgang Thaller.
#
#   This file is part of Retro68.
#
#   Retro68 is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   Retro68 is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with Retro68.  If not, see <http://www.gnu.org/licenses/>.

function verifyInterfaceDirNames()
{
		printf "Searching for special characters in subdirs of $INTERFACES_DIR"
		local found=`find "$INTERFACES_DIR" -type d -name "*" -print `
		if [ "`echo $found | grep \&`" ]; then
				echo "\n$found Contained special character &"
				return 1        # failure
		else
				return 0        # success
		fi
}

function locateInterfaceThing()
{
	local varname=$1
	local name=$2
	printf "Searching for %-25s" "$name..."
	local found=`find "$INTERFACES_DIR" -name ".*" -prune -o -name $name -print`
	if [ -n "$found" ]; then
		eval "$varname=\$found"
		echo ${found#$INTERFACES_DIR/}
		return 0	# success
	else
		echo "NOT FOUND"
		return 1	# failure
	fi
}

function explainInterfaces()
{
	echo "Please get a copy of Apple's Universal Interfaces & Libraries, "
	echo "version 3.x, and place it in the InterfacesAndLibraries directory inside"
	echo "the Retro68 source directory."
	echo
	echo "The exact directory layout does not matter, but there has to be"
	echo "  - a directory with C header files (usually \"CIncludes\")"
	echo "  - a directory with Rez header files (usually \"RIncludes\")"
	echo "  - (for 68K) a directory containing Interface.o (usually \"Libraries\")"
	echo "  - (for PPC) a directory containing InterfaceLib (usually \"SharedLibraries\")"
	echo "  - (for Carbon) Carbon.h and CarbonLib, in the same directories"
	echo
	echo "The Interfaces&Libraries folder from Apple's last MPW release (MPW 3.5 "
	echo "aka MPW GM 'Golden Master') is known to work."
	exit 1
}

function locateAndCheckInterfacesAndLibraries()
{
	echo "Looking for various files in $INTERFACES_DIR/..."

	if verifyInterfaceDirNames; then
		echo "Directory name looks clean"
	else
		echo "Directory name contained special character & that would break build"
		echo "Please install the Interfaces and Libraries files in a path under"
		echo "$INTERFACES_DIR that does not contain the & character"
		exit 1
	fi

	if locateInterfaceThing CONDITIONALMACROS_H ConditionalMacros.h; then
		CINCLUDES=`dirname "$CONDITIONALMACROS_H"`
	else
		echo "Could not find ConditionalMacros.h anywhere inside InterfaceAndLibraries/"
		echo
		explainInterfaces
	fi

	if locateInterfaceThing CONDITIONALMACROS_R ConditionalMacros.r; then
		RINCLUDES=`dirname "$CONDITIONALMACROS_R"`
	else
		echo "Could not find ConditionalMacros.r anywhere inside InterfaceAndLibraries/"
		echo
		explainInterfaces
	fi

	if [ $BUILD_68K != false ]; then

		if locateInterfaceThing INTERFACE_O Interface.o; then
			M68KLIBRARIES=`dirname "$INTERFACE_O"`
		else
			echo "Could not find Interface.o anywhere inside InterfaceAndLibraries/"
			echo "(This file is required for 68K support only)"
			echo
			explainInterfaces
		fi

	fi

	if [ $BUILD_PPC != false ]; then

		if locateInterfaceThing INTERFACELIB InterfaceLib; then
			SHAREDLIBRARIES=`dirname "$INTERFACELIB"`
		else
			echo "Could not find InterfaceLib anywhere inside InterfaceAndLibraries/"
			echo "(This file is required for PowerPC support only)"
			echo
			explainInterfaces
		fi

		if locateInterfaceThing OPENTRANSPORTAPPPPC OpenTransportAppPPC.o; then
			PPCLIBRARIES=`dirname "$OPENTRANSPORTAPPPPC"`
		else
			echo "Could not find OpenTransportAppPPC.o anywhere inside InterfaceAndLibraries/"
			echo "(This file is required for OpenTransport on PPC only)"
		fi

	fi

	if [ $BUILD_CARBON != false ]; then
		if locateInterfaceThing CARBON_H Carbon.h; then
			carbondir=`dirname "$CARBON_H"`
			if [ "$carbondir" != "$CINCLUDES" ]; then
				echo "Carbon.h found, but not in the same directory as ConditionalMacros.h."
				echo "This is confusing."
				echo
				explainInterfaces
			fi
		else
			echo "Could not find Carbon.h anywhere inside InterfaceAndLibraries/"
			echo "(This file is required for Carbon support only)"
			echo
			explainInterfaces
		fi
		if locateInterfaceThing CARBONLIB CarbonLib; then
			carbondir=`dirname "$CARBONLIB"`
			if [ "$carbondir" != "$SHAREDLIBRARIES" ]; then
				echo "Carbon.h found, but not in the same directory as InterfaceLib."
				echo "This is confusing."
				echo
				explainInterfaces
			fi
		else
			echo "Could not find CarbonLib anywhere inside InterfaceAndLibraries/"
			echo "(This file is required for Carbon support only)"
			echo
			explainInterfaces
		fi
	fi
}

function setUpInterfacesAndLibraries()
{
	echo "Preparing CIncludes..."
	rm -rf "$PREFIX/CIncludes"
	mkdir "$PREFIX/CIncludes"
	sh "$SRC/prepare-headers.sh" "$CINCLUDES" "$PREFIX/CIncludes"

	echo "Preparing RIncludes..."
	rm -rf "$PREFIX/RIncludes"
	mkdir "$PREFIX/RIncludes"
	sh "$SRC/prepare-rincludes.sh" "$RINCLUDES" "$PREFIX/RIncludes"

	if [ $BUILD_68K != false ]; then
		echo "Converting 68K static libraries..."
		for macobj in "${M68KLIBRARIES}/"*.o; do
			if [ -r $macobj ]; then
				libname=`basename "$macobj"`
				libname=${libname%.o}
				printf "    %30s => %-30s\n" ${libname}.o lib${libname}.a
				obj="$PREFIX/m68k-apple-macos/lib/$libname.o"
				lib="$PREFIX/m68k-apple-macos/lib/lib${libname}.a"
				rm -f $lib

				(ConvertObj "$macobj" | m68k-apple-macos-as - -o $obj) && m68k-apple-macos-ar cqs $lib $obj
			fi
		done
	fi

	if [ $BUILD_PPC != false ]; then
		case `ResInfo -n "$INTERFACELIB" || echo 0` in
			0)
				echo "WARNING: Couldn't read resource fork for \"$INTERFACELIB\"."
				echo "         Falling back to included import libraries."
				echo "Copying readymade PowerPC import libraries..."
				cp $SRC/ImportLibraries/*.a $PREFIX/powerpc-apple-macos/lib/
				;;
			*)
				echo "Building PowerPC import libraries..."
				for shlib in "${SHAREDLIBRARIES}/"*; do
					libname=`basename "$shlib"`
					implib=lib${libname}.a
					printf "    %30s => %-30s\n" ${libname} ${implib}
					MakeImport "$shlib" "$PREFIX/powerpc-apple-macos/lib/$implib"
				done
				;;
		esac

		if [ -d ${PPCLIBRARIES} ]; then
			echo "Copying static PPC libraries"
			for obj in ${PPCLIBRARIES}/OpenT*.o ${PPCLIBRARIES}/CarbonAccessors.o ${PPCLIBRARIES}/CursorDevicesGlue.o; do
				if [ -r $obj ]; then
					# copy the library:
					cp $obj $PREFIX/powerpc-apple-macos/lib/

					# and wrap it in a .a archive for convenience
					lib=$PREFIX/powerpc-apple-macos/lib/lib`basename "${obj%.o}"`.a
					rm -f $lib
					$PREFIX/bin/powerpc-apple-macos-ar cqs $lib $obj
				fi
			done
		fi
	fi
}

if [ "$0" = "$BASH_SOURCE" ]; then
	# We are being run directly

	if [ $# -lt 2 ]; then
		echo "Usage: $0 /install/path /path/to/InterfacesAndLibraries"
		exit 1
	fi

	PREFIX=$1
	INTERFACES_DIR=$2
	BUILD_68K=${3:-true}
	BUILD_PPC=${4:-true}
	BUILD_CARBON=${5:-true}
	SRC=$(cd `dirname $0` && pwd -P)

	locateAndCheckInterfacesAndLibraries
	setUpInterfacesAndLibraries
fi