#!/bin/sh

#
# This file will source from toplevel Makefile and scripts.
# It's no designed to execute directly.
#
# - Dan Aloni <da-x@colinux.org>
#

# We need to find our self here, or in subdir bin
# BINDIR is bin directory with scripts
if [ -f bin/build-common.sh ]; then
	BINDIR=`pwd`/bin
elif [ -f build-common.sh ]; then
	BINDIR=`pwd`
else
	echo "build-common.sh: Can't detect bin directory!" >&2
	exit 1
fi

# TOPDIR is the directory with ./configure
TOPDIR=`dirname $BINDIR`

# Default Kernel version we are targeting, can overwrite in CFG file.
# Remember: Please update also conf/kernel-*-config
#
# Read version from filename patch/series-*, using the newest we found.
KERNEL_VERSION=`ls $TOPDIR/patch/series-* | sed -n -e 's/^.*series-\([0-9\.]*\)$/\1/' -e '$p'`

# Use User config, if exist
# you probably don't need to change anything from here down
if [ -f $BINDIR/user-build.cfg ] ; then
	# Users directories
	. $BINDIR/user-build.cfg
else
	# fall back to default config
	. $BINDIR/sample.user-build.cfg
fi

case $OSTYPE in
    darwin*)
	TARGET=$MACHTYPE
	BUILD=$TARGET

	# Tweaks for Darwin bash.
	set +o posix 2>/dev/null
	;;
    *)
	# what flavor are we building?
	case $COLINUX_HOST_ARCH in
	    x86_64)
		TARGET=x86_64-w64-mingw32
		;;
	    *)
		TARGET=i686-pc-mingw32
		;;
	esac

	# Current developing build system
	BUILD=i686-pc-linux
	;;
esac

# ARCH must overwrite for builds on 64 bit (target kernel)
TARGET_GUEST_ARCH=x86_64

# Updated by Sam Lantinga <slouken@libsdl.org>
# These are the files from the current MingW release

MINGW_VERSION="3.14"
MINGW_URL=http://heanet.dl.sourceforge.net/sourceforge/mingw
MINGW=mingw-runtime-$MINGW_VERSION
MINGW_ARCHIVE=$MINGW.tar.gz

BINUTILS_VERSION="2.19.1"
BINUTILS_URL=ftp://ftp.gnu.org/pub/gnu/binutils
BINUTILS_RELEASE="$BINUTILS_VERSION"
BINUTILS=binutils-$BINUTILS_RELEASE
BINUTILS_ARCHIVE=$BINUTILS.tar.bz2
#BINUTILS_PATCH="patch/$BINUTILS.diff"

# Minimal binutils version for target. Requirements from Linux kernel
BINUTILS_REQUIREMENTS="2.12.0"

GCC_VERSION="4.1.2"
GCC_RELEASE="$GCC_VERSION"
GCC=gcc-$GCC_RELEASE
GCC_ARCHIVE1=gcc-core-$GCC_RELEASE.tar.bz2
GCC_ARCHIVE2=gcc-g++-$GCC_RELEASE.tar.bz2
GCC_URL=ftp://ftp.gnu.org/pub/gnu/gcc/gcc-$GCC_VERSION
#GCC_PATCH="patch/$GCC.diff"

W32API_VERSION=3.13
W32API=w32api-$W32API_VERSION-mingw32
W32API_SRC=$W32API
W32API_SRC_ARCHIVE=$W32API-src.tar.gz
W32API_ARCHIVE=$W32API-dev.tar.gz
#W32API_PATCH="patch/$W32API_SRC.diff"


FLTK_VERSION="1.1.10"
FLTK_URL=http://ftp.funet.fi/pub/mirrors/ftp.easysw.com/pub/fltk/$FLTK_VERSION
FLTK=fltk-$FLTK_VERSION
FLTK_ARCHIVE=$FLTK-source.tar.bz2
FLTK_PATCH="patch/$FLTK-win32.diff"

WINPCAP_SRC=WpdPack
# Current release
WINPCAP_VERSION="4_1_1"
WINPCAP_URL=http://www.winpcap.org/install/bin
WINPCAP_SRC_ARCHIVE=${WINPCAP_SRC}_${WINPCAP_VERSION}.zip
# in archive later
#WINPCAP_VERSION="4.1.1"
#WINPCAP_URL=http://www.winpcap.org/archive
#WINPCAP_SRC_ARCHIVE=${WINPCAP_VERSION}-${WINPCAP_SRC}.zip

if [ "$COLINUX_ENABLE_WX" = "yes" ]
then
	WX_VERSION="2.8.7"
	WX_URL=http://superb-east.dl.sourceforge.net/sourceforge/wxwindows
	WX=wxWidgets-$WX_VERSION
	WX_ARCHIVE=$WX.tar.gz
	if [ "$COLINUX_HOST_OS" = "winnt" ]; then
		WX_TOOLKIT="msw"
	else
		WX_TOOLKIT="gtk"
	fi
fi

# KERNEL_VERSION: full kernel version (e.g. 2.6.11)
# KERNEL_DIR: sub-dir in www.kernel.org for the download (e.g. v2.6)
KERNEL_DIR=`echo $KERNEL_VERSION | sed -e 's/^\([0-9]*\.[0-9]*\)\..*$/v\1/'`

KERNEL=linux-$KERNEL_VERSION
KERNEL_URL=http://www.kernel.org/pub/linux/kernel/$KERNEL_DIR
KERNEL_ARCHIVE=$KERNEL.tar.bz2

CO_VERSION=`cat $TOPDIR/src/colinux/VERSION`
COMPLETE_KERNEL_NAME=$KERNEL_VERSION-co-$CO_VERSION$COLINUX_SVN_REVISION

# Set defaults
if [ -z "$COLINUX_TARGET_KERNEL_SOURCE" -a -z "$COLINUX_TARGET_KERNEL_BUILD" ]
then
	if [ -z "$COLINUX_TARGET_KERNEL_PATH" ]
	then
		# Source and build in differ directories
		COLINUX_TARGET_KERNEL_SOURCE="$BUILD_DIR/$KERNEL-source"
		COLINUX_TARGET_KERNEL_BUILD="$BUILD_DIR/$KERNEL-build"
	else
		# fallback for old style
		COLINUX_TARGET_KERNEL_SOURCE="$COLINUX_TARGET_KERNEL_PATH"
		COLINUX_TARGET_KERNEL_BUILD="$COLINUX_TARGET_KERNEL_PATH"
	fi
fi

# MD5sum files stored here
MD5DIR="$BUILD_DIR"
W32LIBS_CHECKSUM="$MD5DIR/.build-colinux-libs.md5"
KERNEL_CHECKSUM="$MD5DIR/.build-kernel.md5"

# coLinux kernel we are targeting
if [ -z "$KERNEL_VERSION" -o -z "$KERNEL_DIR" ] ; then
	# What's wrong here?
	cat >&2 <<EOF
	Failed: \$KERNEL_VERSION or \$KERNEL_DIR
	Can't find the kernel patch, probably wrong script,
	or file patch/series-* don't exist?
EOF
	exit -1
fi

# Get variables only? Then end here.
if [ "$1" = "--get-vars" ]; then
	return
fi

# where does it go?
if [ -z "$PREFIX" ] ; then
	echo "Please specify the $""PREFIX directory in user-build.cfg (e.g, /home/$USER/mingw32)"
	exit -1
fi

# where does it go?
if [ -z "$DOWNLOADS" ] ; then
	echo "Please specify the $""DOWNLOADS directory in user-build.cfg (e.g, /tmp/$USER/download)"
	exit -1
fi

# where does it go?
if [ -z "$BUILD_DIR" ] ; then
	echo "Please specify the $""BUILD_DIR directory in user-build.cfg (e.g, /tmp/$USER/build)"
	exit -1
fi

# Default path to modules
if [ -z "$COLINUX_TARGET_MODULE_PATH" ] ; then
	COLINUX_TARGET_MODULE_PATH="$COLINUX_TARGET_KERNEL_BUILD/_install"
fi

# Default logfile of building (Append), can overwrite in user-build.cfg
if [ -z "$COLINUX_BUILD_LOG" ] ; then
    COLINUX_BUILD_LOG="$TOPDIR/build-colinux-$$.log"
fi

if [ -z "$COLINUX_BUILD_ERR" ] ; then
    COLINUX_BUILD_ERR="$TOPDIR/build-colinux-$$.err"
fi

# Install directory set?
if [ -z "$COLINUX_INSTALL_DIR" ] ; then
    echo "Please specify the $""COLINUX_INSTALL_DIR in user-build.cfg (e.g, /home/$USER/colinux/dist)"
    exit -1
fi

# These are the files from the SDL website
# need install directory first on the path so gcc can find binutils
# Fairly for ccache: Add the cross path at end.

PATH="$PATH:$PREFIX/bin"

#
# download a file from a given url, only if it is not present
#

download_file()
{
	# Make sure wget is installed
	if [ "x`which wget`" = "x" ]
	then
		echo "You need to install wget." >&2
		exit 1
	fi

	if [ ! -f "$DOWNLOADS/$1" ]
	then
		mkdir -p "$DOWNLOADS"
		cd "$DOWNLOADS"
		echo "Downloading $1"
		if ! wget "$2/$1"
		then
			echo "Could not download $1"
			# move broken download
			test -f $1 && mv $1 $1.incomplete
			exit 1
		fi
		cd "$BINDIR"
	else
		echo "Found $1 in the srcdir $DOWNLOADS"
	fi
}

# Arg1: gzip or bzip2 tar archive
# Arg2: destination directory
tar_unpack_to()
{
	local tool

	case "$DOWNLOADS/$1" in
		*.tar.gz|*.tgz)
			tool=gzip
		;;
		*.tar.bz2)
			tool=bunzip2
		;;
		*)
			echo "$FUNCNAME($LINENO): unknown extension for $1" >&2
			exit 1
		;;
	esac

	mkdir -p "$2"
	cd "$2"
	$tool -dc "$DOWNLOADS/$1" | tar x \
	|| { echo "unpack failed for $1" >&2; exit 1; }
}

#
# Show errors from actual logfile, than exit build process
# Arg1: Errorlevel
# Arg2: Error message
#
error_exit()
{
	# Show errors in log file with tail, if errorlevel < 10
	if [ $1 -lt 10 ]; then
		if [ -s $COLINUX_BUILD_LOG ]; then
			echo -e "\n  --- BUILD LOG $COLINUX_BUILD_LOG:"
			tail -n 20 $COLINUX_BUILD_LOG
		fi
		if [ -s $COLINUX_BUILD_ERR ]; then
			echo -e "\n  --- ERROR LOG $COLINUX_BUILD_ERR:"
			tail -n 20 $COLINUX_BUILD_ERR
		fi
	fi

	echo "$2"
	exit $1
}

#
# Strip kernel image file 'vmlinux'
# Arg1: input file
# Arg2: stripped output file
#
strip_kernel()
{
	local STRIP="strip --strip-all"
	local FROM_SOURCE="src/colinux/user/daemon.c"
	local KEEP

	# Build the list of needed symbols: Grep from loader function in daemon, this lines
	# --> rc = co_daemon_load_symbol(daemon, "init_thread_union", &import->kernel_init_task_union);
	# --> rc = co_daemon_load_symbol_and_data(daemon, "co_arch_info", &import->kernel_co_arch_info,
	#     _____^^^^^^^^^^^^^^^^^^^^^__________________^************^___^^^^^^______________________

	KEEP=`grep "co_daemon_load_symbol" $TOPDIR/$FROM_SOURCE | \
	  sed -n -e 's/^.*daemon[^"]*"\([^"]*\)".*import.*$/ --keep-symbol=\1/p' | tr -d "\n"`
	if [ -n "$KEEP" ]
	then
		# Kernel strip
		$STRIP $KEEP -o $2 $1 || exit $?
	else
		# Function not found by grep
		echo -e "\nWARNING: $FROM_SOURCE" >&2
		echo -e "Can't get symbols for stripping! Don't strip vmlinux\n" >&2

		# Fallback into copy mode
		cp -a $1 $2
	fi
}

# Create ZIP packages (for "autobuild")
build_package()
{
	local name bname oname
	local DATE=`LANG=C TZ="UTC" date +%G%m%d`
	local SYMBOLS_ZIP=$COLINUX_INSTALL_DIR/daemons-$CO_VERSION-$DATE.dbg.zip
	local DAEMONS_ZIP=$COLINUX_INSTALL_DIR/daemons-$CO_VERSION-$DATE.zip
	local VMLINUX_ZIP=$COLINUX_INSTALL_DIR/vmlinux-$COMPLETE_KERNEL_NAME-$DATE.zip
	local MODULES_TGZ=$COLINUX_INSTALL_DIR/modules-$COMPLETE_KERNEL_NAME-$DATE.tgz
	local EXE_DIR="$TOPDIR/src/colinux/os/winnt/build"
	local PREMAID="$TOPDIR/src/colinux/os/winnt/user/install/premaid"

	echo "Create ZIP packages into $COLINUX_INSTALL_DIR"
	mkdir -p $COLINUX_INSTALL_DIR

	# remove old zip files
	rm -f $SYMBOLS_ZIP $DAEMONS_ZIP

	# Add files with debugging symbols into zip
	zip -j "$SYMBOLS_ZIP" $EXE_DIR/*.exe $EXE_DIR/*.sys || exit $?

	# Use stripped files from installer and add to zip
	zip -j $DAEMONS_ZIP $PREMAID/*.exe $PREMAID/*.sys || exit $?

	# Exist Kernel and is newer?
	if [ $COLINUX_TARGET_KERNEL_BUILD/vmlinux -nt $VMLINUX_ZIP ]
	then
		echo "Installing Kernel $KERNEL_VERSION in $COLINUX_INSTALL_DIR"

		# remove old zip file
		rm -f $VMLINUX_ZIP

		if [ "$COLINUX_KERNEL_STRIP" = "yes" ]
		then
			name=vmlinux
			oname=$COLINUX_INSTALL_DIR/$name

			# Create map file with symbols, add to zip
			map=$COLINUX_INSTALL_DIR/$name.map
			nm $COLINUX_TARGET_KERNEL_BUILD/$name | sort | uniq > $map
			zip -j $VMLINUX_ZIP $map || exit $?
			rm $map

			# Strip kernel and add to ZIP
			strip_kernel $COLINUX_TARGET_KERNEL_BUILD/$name $oname
			zip -j $VMLINUX_ZIP $oname || exit $?
			rm $oname
		else
			# Add kernel to ZIP (not stripped)
			zip -j $VMLINUX_ZIP $COLINUX_TARGET_KERNEL_BUILD/vmlinux || exit $?
		fi
	fi

	# Copy modules file
	echo "Installing Modules $KERNEL_VERSION in $COLINUX_INSTALL_DIR"
	cp -p $COLINUX_TARGET_KERNEL_BUILD/vmlinux-modules.tar.gz $MODULES_TGZ
}