#!/bin/sh
#
# Version 1.5
#
# Download, patch, configure, build & install a new version of Samba like this:
# 
# ./BUILD -V 4.9.4 -T liu install
# 
# "-T liu" isn't technically necessary, it just adds a convenient "tag" to the version number for the
# install directory (/liu/pkg/samba/4.9.4-liu) in the example above.
# 
# Then you copy the whole tree to filifjonkan:/export/liupkg/samba/<version> and use it.
#

PATH=/usr/local/bin:/usr/bin:/bin
export PATH

NCPU=24
ROOT="/liu/pkg"
BUILD="`basename $0`"
TAG=""
PWD="`pwd`"
MAKE=gmake
GETVER="latest"
OPTLEVEL=""

CC=""
COMPILERS="gcc8 gcc7 gcc6 gcc cc"
for C in $COMPILERS; do
    if [ -x "/usr/local/bin/$C" -o -x "/usr/bin/$C" -o -x "/bin/$C" ]; then
       CC="$C"
       break
    fi
done

MORE=yes
while [ $MORE = yes ]; do
    case "$1" in
	-h|--help|-\?)
	    echo "Usage: $0 [-h|--help] [-a|--auto] [-R|--root <dir>] [-V|--version <ver>] [-C|--compiler <cc>] [-T|--tag <tag>] [-O|--optimize <level>] <arguments>"
	    exit 0
	    ;;
	-C|--compiler)
	    CC="$2"
	    shift
	    ;;
	-R|--root)
	    ROOT="$2"
	    shift
	    ;;
	-O|--optimize)
	    OPTLEVEL="$2"
	    shift
	    ;;
	-V|--version)
	    GETVER="$2"
	    shift
	    ;;
	-T|--tag)
	    TAG="$2"
	    shift
	    ;;
	-|--)
	    shift
	    MORE=no
	    ;;
	-*)
	    echo "$0: Error: $0: Invalid switch" >&2
	    exit 1
	    ;;
	*)
	    MORE=no
	    ;;
    esac
    if [ $MORE = yes ]; then
	shift
    fi
done

case "$GETVER" in
    latest)
	SOURCE="https://download.samba.org/pub/samba/samba-${GETVER}.tar.gz"
	;;
    *rc*)
	SOURCE="https://download.samba.org/pub/samba/rc/samba-${GETVER}.tar.gz"
	;;
    *)
	SOURCE="https://download.samba.org/pub/samba/stable/samba-${GETVER}.tar.gz"
	;;
esac

PKGVER="`basename $PWD`"
PKG="`echo $PKGVER | awk -F- '{print $1}'`"
VER="`echo $PKGVER | awk -F- '{print $2}'`"

if [ "$TAG" = "" ]; then
    NTAG="`echo $PKGVER | awk -F- '{print $3}'`"
    if [ "$NTAG" != "" ]; then
	TAG="$NTAG"
    fi
fi

if [ "$PKG" != "samba" -o "$VER" = "" ]; then
    OLDSUM="`sum samba-${GETVER}.tar.gz 2>/dev/null`"
    
    if ! wget -N -q --show-progress "$SOURCE"; then
	echo "$0: Error: $SOURCE: Unable to download ${GETVER} Samba source" >&2
	exit 1
    fi

    if [ ! -f "samba-${GETVER}.tar.gz" ]; then
	echo "$0: samba-${GETVER}.tar.gz not found" >&2
	exit 1
    fi
	
    NEWSUM="`sum samba-${GETVER}.tar.gz 2>/dev/null`"
    SAMBASRC="`tar ztf samba-${GETVER}.tar.gz | awk -F'/' '{print $1; exit 0}'`"
    if [ "$TAG" = "" ]; then
	SAMBADIR="${SAMBASRC}"
    else
	SAMBADIR="${SAMBASRC}-${TAG}"
    fi
    
    # Updated tar archive - force rebuild
    if [ -d "${SAMBADIR}" -a "$OLDSUM" != "$NEWSUM" ]; then
	rm -fr "${SAMBADIR}"
    fi
    
    if [ ! -d "${SAMBADIR}" ]; then
	echo "*** Unpacking SAMBA and renaming to ${SAMBADIR} ***"
	tar zxf "samba-${GETVER}.tar.gz" && mv "$SAMBASRC" "$SAMBADIR"
    fi

    if [ -d "${SAMBADIR}" ]; then
	echo "*** Running ${BUILD} $@ in ${SAMBADIR} ***"
	DIR="`pwd`"
	cd "${SAMBADIR}" && exec "${DIR}/${BUILD}" "$@"
    fi
    
    echo "$0: The BUILD script must be executed in the 'samba-VERSION' directory" >&2
    exit 1
fi

case "$VER" in
    4.*)
	MAJOR="`echo $VER | awk -F. '{print $1}'`"
	MINOR="`echo $VER | awk -F. '{print $2}'`"
	PATCH="`echo $VER | awk -F. '{print $3}'`"
	;;
    *)
	echo "$0: $VER: Invalid Samba major version" >&2
	exit 1
	;;
esac

if [ "$TAG" = "" ]; then
    PREFIX="$ROOT/$PKG/${VER}"
else
    PREFIX="$ROOT/$PKG/${VER}-${TAG}"
fi

CONFARGS="\
--sysconfdir=/etc/samba \
--localstatedir=/var/samba \
--mandir=${PREFIX}/share \
--without-ad-dc \
--disable-cups \
--with-shared-modules=nfs4_acls,vfs_zfsacl,vfs_dfs_samba4 \
--with-privatedir=/etc/samba/private \
--with-configdir=/etc/samba \
--with-logfilebase=/var/samba/logs"

case "$OPTLEVEL" in
    no|none)
	CFLAGS="-g"
	;;
    *)
	CFLAGS="-g -O$OPTLEVEL"
	;;
esac

OS="`uname -s`"
case "$OS" in
    SunOS)
        CC="$CC -lreadline -lncurses -lnsl -lsocket"
	CONFARGS="$CONFARGS --accel-aes=none --without-json-audit --without-libarchive"
        ;;
    FreeBSD)
	CONFARGS="$CONFARGS --accel-aes=intelaesni"
        ;;
    *)
        echo "$0: Error: $OS: Unknown operating system" >&2
        exit 1
        ;;
esac

if [ "$TAG" = "" ]; then
    echo "Building Samba version $VER"
else
    echo "Building Samba version $VER ($TAG)"
fi

if [ "$CC" != "" ]; then
    export CC
fi
if [ "$CFLAGS" != "" ]; then
    export CFLAGS
fi

export MAKE


build() {
    case "$1" in
	patch)
	    if [ -d "../Patches/${MAJOR}.${MINOR}" ]; then
		for PF in `ls -1 "../Patches/$MAJOR.$MINOR"/*.patch`; do
		    echo "Applying patch $PF"
		    patch -s -p1 <$PF || exit 1
		done
		touch .patched
	    fi
	    ;;
	
	conf*)
	    if [ ! -e .patched ]; then
		build patch
	    fi
	    ./configure --prefix="$PREFIX" $CONFARGS && touch .configured
	    ;;
	
	make|"")
	    if [ -d "../Patches/${MAJOR}.${MINOR}" -a ! -e .patched ]; then
		build patch
	    fi
	    if [ ! -e .configured ]; then
		build configure
	    fi
	    gmake -j$NCPU && touch .built
	    ;;
	
	install)
	    if [ ! -e .configured ]; then
		build configure
	    fi
	    if [ ! -e .built ]; then
		build
	    fi
	    $MAKE install
	    ;;
	
	install-man)
	    for N in 1 5 7 8; do
		mkdir -p "$PREFIX/share/man/man$N" && cp docs/manpages/*.$N "$PREFIX/share/man/man$N"
	    done
	    ;;
	
	clean)
  	    $MAKE clean
	    ;;
	
	distclean)
  	    $MAKE distclean
	    rm -f .configured
	    ;;
	
	all)
	    build patch && build configure && build make
	    ;;
	
	*)
	    echo "$0: Error: $1: Invalid action" >&2
	    exit 1
	    ;;
	
	help)
	    echo "Usage: $0 patch|configure|make|install|clean|distclean|all"
	    exit 0
	    ;;
    esac
}

if [ "$*" != "" ]; then
    for A in "$@"; do
	build "$A"
    done
else
    build
fi

exit 0