#!/bin/bash

builddir=./build

prepare() {
	test -d $builddir || mkdir $builddir

	#Get the OpenWrt Core Source for Firmware
	svn checkout -r 35298 svn://svn.openwrt.org/openwrt/branches/attitude_adjustment/ $target
	#apply own feeds.conf
	cp ./build_patches/feeds.conf $target/feeds.conf

	test -d $target/feeds && /bin/rm -rf $target/feeds

	$target/scripts/feeds update
	
	$target/scripts/feeds install -a

	#fix for building toolchain on texinfo>=5 
	cp -a build_patches/toolchain $target

	# This changes the default behavior of sysupgrade to not save the config 
	cat build_patches/sysupgrade_no_config_save.patch | patch -p0 -d $target

	# This adds the sysctl load just before the network comes up
	cat build_patches/invoke_sysctl_before_network.patch | patch -p0 -d $target

	#backport mac80211 from r37747
	svn up -r 37747 $target/package/mac80211
	svn up -r 37378 $target/target/linux/generic/files/include/linux/ath9k_platform.h 
		
	#backport kernelpatches from openwrt r36664
	cp build_patches/linux/ar71xx/patches-3.3/* $target/target/linux/ar71xx/patches-3.3

	#batman-adv: distributed arp table fixes
	cat build_patches/changeset_35324.diff | patch -p1 -d $target/feeds
	#batman-adv: fix dat NULL pointer dereference
	cat build_patches/changeset_35609.diff | patch -p1 -d $target/feeds

	#saves ~200MB for each build
	test -d ./dl || mkdir ./dl
	ln -s ../../dl $target/dl

	board_prepare
}

prebuild() {
	#create filesdir for our config
	/bin/rm -rf $target/files
	mkdir $target/files

	cp -r ./bsp/default/root_file_system/* $target/files/

	board_prebuild

    for template in $(find $target/files -name *.tpl)
    do
        echo "Translating $template .."
        $tpl_translate $template > $(basename $template .tpl)
        /bin/rm $template
    done

	#insert actual firware version informations into release file
	version=$(git describe --tags --dirty)

	echo "FIRMWARE_VERSION=\"$version\"" > $target/files/etc/firmware_release
	echo "RELEASE_DATE=\"build date: "`date`"\"" >> $target/files/etc/firmware_release
	echo "FIRMWARE_REVISION=\"build date: "`date`"\"" >> $target/files/etc/firmware_release
	echo "OPENWRT_CORE_REVISION=\""`svn info $target |grep Revision: |cut -c11-`"\"" >> $target/files/etc/firmware_release
	echo "OPENWRT_FEEDS_PACKAGES_REVISION=\""`svn info $target/feeds/packages |grep Revision: |cut -c11-`"\"" >> $target/files/etc/firmware_release
}

build() {
	prebuild

	opath=$(pwd)
	cd $target
	cpus=$(grep processor /proc/cpuinfo | wc -l)

	case "$1" in
		"debug")
			make V=99
			;;
		"fast")
			ionice -c 2 -- nice -n 1 -- make -j$[$cpus*2]
			;;
		*)
			ionice -c 3 -- nice -n 10 -- make -j$[$cpus+1]
			;;
	esac
	# actually this does northing!
	# rm -rf ./build_dir/files/
	cd $opath

	if [ ! -d bin ]; then
		mkdir bin
	fi
	
	postbuild
}

postbuild() {
	board_postbuild
}

flash() {
	# some flash tools need an arguement..
	board_flash $1
}

clean() {
	board_clean
	/bin/rm -rf bin $builddir
}

routers() {
	echo "router-types: "
	echo "	dir300"
	echo "	dir300b_adhoc"
	echo "	dir300b_ap"
	echo "	fonera"
	echo "	wrt54g_ap"
	echo "	wrt54g_adhoc"
	echo "	wr741nd"
	echo "	wr1043nd"
}

if [ "$1" != "selectbsp" -a "$1" != "selectcommunity" ]; then
	if [ ! -h selected_bsp ]; then
		echo "Please select a Board-Support-Package using:"
		echo "$0 selectbsp"
		exit
    fi
	if [ ! -h selected_community ]; then
		echo "Please select a community file using:"
		echo "$0 selectcommunity"
		exit
    fi
    echo "Working with $(/bin/ls -l selected_bsp | awk '{ print $11 }') and" \
        "$(/bin/ls -l selected_community | awk '{ print $11 }')"
    . selected_bsp
    tpl_translate=$(awk -F= 'BEGIN{printf("sed")} /^.+$/{printf(" -es/\\${%s}/%s/g",$1,$2)}' selected_community)
    echo
fi

case "$1" in
	"selectbsp")
		if [ "$2" = "help" ] || [ "$2" = "" ]; then
			echo "Select a Board-Support-Package:"
			echo
			echo "Usage: $0 $1 bsp"
			echo "bsp: "
			/bin/ls bsp/*.bsp
		else
            if [ ! -f $2 ]; then
                echo "Could not find $2"
            else
                /bin/rm -rf selected_bsp
                /bin/ln -s $2 selected_bsp
            fi
		fi
		;;
	"selectcommunity")
		if [ "$2" = "help" ] || [ "$2" = "" ]; then
			echo "Select a Community-File:"
			echo
			echo "Usage: $0 $1 community.cfg"
			echo "community.cfg: "
			/bin/ls community/*.cfg
		else
            if [ ! -f $2 ]; then
                echo "Could not find $2"
            else
                /bin/rm -rf selected_community
                /bin/ln -s $2 selected_community
            fi
		fi
		;;
	"prepare")
		if [ "$2" = "help" ] || [ "$2" = "x" ]; then
			echo "This option fetches the sources for the images and configurates the build so that it can be compiled"
			echo "Usage: $0 $1"
		else
			prepare
		fi
		;;
	"build")
		if [ "$2" = "help" ] || [ "$2" = "x" ]; then
			echo "This option compiles the firmware"
			echo "Normaly the build uses lower IO and System priorities, "
			echo "you can append \"fast\" option, to use normal user priorities"
			echo "Usage: $0 $1 [fast|debug]"
		else
			build "$2"
		fi
		;;
	"download")
		if [ "$2" = "help" ] || [ "$2" = "" ]; then
			echo "This option downloads the ready configured images from an external location if needet."
			echo "Usage: $0 $1 http://downloadfolder router-type"
			echo "Common downloadfolder for firmware version 0.3 is http://dev.freifunk-ol.de/firmware/0.3/"
			routers
			echo
			echo
			echo "This function is broken!"
		else
			exit
			mkdir ./bin
			cd ./bin
			wget "$2/$3/openwrt-$3-root.squashfs"
			wget "$2/$3/openwrt-$3-vmlinux.lzma"
			cd ..
		fi
		;;
	"flash")
		if [ "$2" = "help" ] || [ "$2" = "x" ]; then
			echo "This option flashes the router."
			echo "$0 $1 net-dev"
			routers
			echo "net-dev:"
			echo "	ethX"
		else
			flash "$2"
		fi
		;;
	"clean")
		if [ "$2" = "help" ] || [ "$2" = "x" ]; then
			echo "This option cleans all build files."
			echo "$0 $1 all"
		else
			clean
		fi
		;;
	*)
		echo "This is the Build Environment Script of the Freifunk Community Oldenburg."
		echo "Usage: $0 command"
		echo "command:"
		echo "	prepare"
		echo "	build"
		echo "	flash"
		echo "	download"
		echo ""
		echo "If you need help to one of these options just type $0 command help"
	;;
esac