common_functions

#!/bin/bash

: ${CACHE_DIR:=/var/cache/build}

set_build_arch()
{
    : ${BUILD_HOST_ARCH:=`uname -m`}

    if [ -z "$BUILD_ARCH" ]; then
	BUILD_ARCH="$BUILD_HOST_ARCH"
	test i686 != "$BUILD_ARCH" || BUILD_ARCH=i586 # XXX: why?
    fi

    case $BUILD_ARCH in
      i686) BUILD_ARCH="i686:i586:i486:i386" ;;
      i586) BUILD_ARCH="i586:i486:i386" ;;
      i486) BUILD_ARCH="i486:i386" ;;
      i386) BUILD_ARCH="i386" ;;
      x86_64) BUILD_ARCH="x86_64:i686:i586:i486:i386" ;;
      sparc64v) BUILD_ARCH="sparc64v:sparc64:sparcv9v:sparcv9:sparcv8:sparc" ;;
      sparc64) BUILD_ARCH="sparc64:sparcv9:sparcv8:sparc" ;;
      sparcv9v) BUILD_ARCH="sparcv9v:sparcv9:sparcv8:sparc" ;;
      sparcv9) BUILD_ARCH="sparcv9:sparcv8:sparc" ;;
      sparcv8) BUILD_ARCH="sparcv8:sparc" ;;
      sparc) BUILD_ARCH="sparc" ;;
    esac
    if test "$BUILD_ARCH" != "${BUILD_ARCH#i686}" ; then
	cpuflags=`grep ^flags /proc/cpuinfo`
	cpuflags="$cpuflags "
	if test "$cpuflags" = "${cpuflags/ cx8 /}" -o "$cpuflags" = "${cpuflags/ cmov /}"; then
	    echo "Your cpu doesn't support i686 rpms. Exit."
	    cleanup_and_exit 1
	fi
    fi
}

check_exit()
{
    if test -e $BUILD_ROOT/exit; then
	echo "exit ..."
	cleanup_and_exit 1
    fi
}

is_emulator_arch()
{
    local arch
    for arch in $EMULATOR_ARCHS; do
	if test "$BUILD_ARCH" = "$arch" -a "$BUILD_HOST_ARCH" != "$arch"; then
	    return 0
	fi
    done
    return 1
}

internal_set_sb2_settings() {
        SB2_TOOLCHAIN="/unknown"
        SB2_INSTALLMODE="obs-rpm-install"
        SB2_DEFAULTMODE="obs-rpm-build"
        SB2_SYSROOT="-C --sysroot=/ -L --sysroot=/"
        SB2_MAPPING_METHOD="both"
        SB2_DEBUG=""
        SB2_QEMU="/unknown"
        while test -n "$1" ; do
	    case "$1" in
		--toolchain)
		    shift
		    SB2_TOOLCHAIN=$1
		    shift
		    ;;
		--installmode)
		    shift
		    SB2_INSTALLMODE=$1
		    shift
		    ;;
		--defaultmode)
		    shift
		    SB2_DEFAULTMODE=$1
		    shift
		    ;;
		--mappingmethod)
		    shift 
		    SB2_MAPPING_METHOD=$1
		    shift
		    ;;
		--bootstrap)
		    shift
		    SB2_SYSROOT=""
		    ;;
		--qemu)
		    shift
		    SB2_QEMU=$1
		    shift
		    ;;
		--infologs)
		    shift
		    SB2_DEBUG="-q -L info"
		    ;;
		--debug)
		    shift
		    SB2_DEBUG="-q -d"
		    ;;
		*)
		    break
		    ;;
	    esac
	done
	if [ "x$SB2_TOOLCHAIN" = "x/unknown" ]; then
		echo "Please provide a proper SB2 toolchain in SB2flags. exiting.."
		cleanup_and_exit 1
	fi
}


cleanup_sb2() {
	if [ ! -z "$BUILD_SB2FLAGS" ]; then
		if [ -e /home/abuild/sb2-session-needroot ]; then
			su -c "cd $PWD; /usr/bin/sb2 -t oscbuild -D /home/abuild/sb2-session-needroot" - abuild
		fi
		if [ -e /home/abuild/sb2-session-needuser ]; then
			su -c "cd $PWD; /usr/bin/sb2 -t oscbuild -D /home/abuild/sb2-session-needuser" - abuild
		fi
	fi
}

shellquote()
{
    for arg; do
	arg=${arg/\\/\\\\}
	arg=${arg/\$/\\\$}
	arg=${arg/\"/\\\"}
	arg=${arg/\`/\\\`}
	echo -n " \"$arg\""
    done
}


# chroot-like wrapper, enter_target <mode: needroot|user> $TARGET commands
# needroot - operations that need to be done as root, like unpacking into file system, etc
# needuser - operations that will be done as non-root user

enter_target() {
	if [ -z "$BUILD_SB2FLAGS" ]; then
		if [ x$1 == xneeduser ]; then
			shift
			PARAMS=`shellquote "$@"`
			chroot $BUILD_TARGET su -c "$PARAMS" - $BUILD_USER
		elif [ x$1 == xneedscript ]; then
			shift
			SCRIPT=$1
			shift
			chroot $BUILD_TARGET su -s $SCRIPT $BUILD_USER -- "$@"
		else
			shift
			chroot $BUILD_TARGET "$@"
		fi			
	else
		if [ -z "$VM_TYPE" ]; then
			echo "SB2 currently does not work with chroots.."
			cleanup_and_exit 1
		fi
		if [ -z "$SB2_TOOLCHAIN" ]; then
			internal_set_sb2_settings $BUILD_SB2FLAGS
		fi
		if [ ! -e $BUILD_TARGET/.sb2inited ]; then
			ORIG=$PWD
			cd $BUILD_TARGET
			su -c "cd $PWD; /usr/bin/sb2-init $SB2_SYSROOT -c $SB2_QEMU -n -N -m $SB2_DEFAULTMODE -t / oscbuild $SB2_TOOLCHAIN" - abuild
			su -c "cd $PWD; /usr/bin/sb2-config -t oscbuild setenv SBOX_MAPPING_METHOD $SB2_MAPPING_METHOD" - abuild

			cd $ORIG
			touch $BUILD_TARGET/.sb2inited
		fi
		if [ x$1 = xneedscript ]; then
			PARAM=needuser
		else
			PARAM=$1
		fi
		case "$PARAM" in
			needroot)
				shift
				ORIG=$PWD
				cd /target
		                if [ ! -e /home/abuild/sb2-session-needroot ]; then
			            	SESSION="-S /home/abuild/sb2-session-needroot -t oscbuild"
			        else
        			       	SESSION="-J /home/abuild/sb2-session-needroot"
        		        fi
				su -c "cd $PWD; /usr/bin/sb2-config -t oscbuild setenv HOME /root" - abuild
	  	                su -c "cd $PWD; /usr/bin/sb2-config -t oscbuild setenv USER root" - abuild
	  	                PARAMS=`shellquote "$@"`
				su -c "cd $PWD; /usr/bin/sb2 $SESSION $SB2_DEBUG -m $SB2_INSTALLMODE -R $PARAMS" - abuild
				RET=$?
				cd $ORIG
				return $RET
				;;
			needuser)
				# Debugging
				shift
				ORIG=$PWD
				cd /target
		                if [ ! -e /home/abuild/sb2-session-needuser ]; then
			            	SESSION="-S /home/abuild/sb2-session-needuser -t oscbuild"
			        else
        			       	SESSION="-J /home/abuild/sb2-session-needuser"
        		        fi
        		        PARAMS=`shellquote "$@"`

				su -c "cd $PWD; /usr/bin/sb2-config -t oscbuild setenv HOME /home/abuild" - abuild
	  	                su -c "cd $PWD; /usr/bin/sb2-config -t oscbuild setenv USER abuild" - abuild
				su -c "cd $PWD; /usr/bin/sb2 $SESSION $SB2_DEBUG -m $SB2_DEFAULTMODE $PARAMS" - abuild
				RET=$?
				cd $ORIG
				return $RET
				;;
			*)
				echo "Unknown parameter $1" >&2
				;;
		esac
	fi
}


check_use_emulator()
{
    is_emulator_arch || return

    if [ -z "$VM_TYPE" ]; then
	return 0
    fi

    # to run the qemu initialization in the XEN chroot, we need to
    # register it with a static program or shell script
    case "$BUILD_HOST_ARCH" in
	i?86|x86_64)
	    if test -e /usr/lib/build/initvm && \
		test -e /usr/lib/build/qemu-reg -o -e /.build/qemu-reg; then
		return 0	# prefer initvm to handle registration
	    elif test -e /bin/bash-static \
		-a -e /bin/mount-static \
		-a -e /usr/sbin/qemu-binfmt-conf.sh; then
		return 0	# as backup use /usr/sbin/qemu-binfmt.conf.sh
	    elif [ -n "$BUILD_SB2FLAGS" ]; then
	        return 0 # Use sb2
	    else
		# XXX: error?
		echo "Warning: cross compile not possible due to missing static binaries"
	    fi
	;;
    esac
    return 1
}

# usage:
# progress_setup LIST
# for I in $LIST; do
#    progress_step LIST
#    action $I 
# done

# $1 name of a textual list
progress_setup() {
    eval "$1__ARRAY__=(\$$1)"
    eval "$1__INDEX__=1"
    eval "$1__LENGTH__=\${#$1__ARRAY__[@]}"
}

# $1 name of a textual list
# $2 optional, printf format for 2 numeric arguments (current, total)
progress_step() {
    local IDX=$1__INDEX__
    local LEN=$1__LENGTH__
    printf "${2-[%d/%d] }" $(($IDX++)) ${!LEN}
}