#################################################################
#
# Debian live-build specific functions.
#
# Author: Jan Blunck <jblunck@infradead.org>
#
# This file is part of build.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or 3 as
# published by the Free Software Foundation.
#
# This program 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 this program (see the file COPYING); if not, write to the
# Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
#
#################################################################

recipe_setup_livebuild() {

    TOPDIR=/usr/src/packages
    rm -rf "$BUILD_ROOT$TOPDIR"
    for i in OTHER SOURCES LIVEBUILD_ROOT ; do
	mkdir -p "$BUILD_ROOT$TOPDIR/$i"
    done
    chown -R "$ABUILD_UID:$ABUILD_GID" "$BUILD_ROOT$TOPDIR"
    if test "$MYSRCDIR" = $BUILD_ROOT/.build-srcdir ; then
	mv "$MYSRCDIR"/* $BUILD_ROOT$TOPDIR/SOURCES/
    else
	cp -p "$MYSRCDIR"/* $BUILD_ROOT$TOPDIR/SOURCES/
    fi
}

recipe_prepare_livebuild() {
    :
}

createrepo_debian() {
    local DIR=${1}
    local ARCH=${2}
    local DIST=${3}

    if [ -z "${DIR}" -o ! -d ${DIR} -o ${DIR} = ${DIR##${BUILD_ROOT}} ] ; then
        return
    fi

    pushd ${DIR} >/dev/null

    # cleanup existing repository files
    rm -f Packages Packages.gz Release
    rm -fr dists

    mkdir -p dists/${DIST}
    # Suite is symlinked to Codename
    ln -s ${DIST} dists/stable

    # create Packages and Sources files
    mkdir -p dists/${DIST}/main/binary-${ARCH}
    mkdir -p dists/${DIST}/main/source
    cat > ${BUILD_ROOT}/.createrepo_debian.tmp.sh <<-EOF
	cd /.build.binaries || exit 1
	dpkg-scanpackages -m . > dists/${DIST}/main/binary-${ARCH}/Packages
	gzip -c9 < dists/${DIST}/main/binary-${ARCH}/Packages \
	    > dists/${DIST}/main/binary-${ARCH}/Packages.gz
	dpkg-scansources . > dists/${DIST}/main/source/Sources
	gzip -c9 dists/${DIST}/main/source/Sources \
	    > dists/${DIST}/main/source/Sources.gz
	EOF
    $CHROOT su -c "sh /.createrepo_debian.tmp.sh" - root
    local RESULT=$?
    rm -f $BUILD_ROOT/.createrepo_debian.tmp.sh
    [ "${RESULT}" != 0 ] && return

    # create Release file
    pushd dists/${DIST} >/dev/null
    cat > Release <<-EOF
	Origin: Debian
	Label: Debian
	Suite: stable
	Version: 7.1
	Codename: ${DIST}
	Date: Sat, 15 Jun 2013 10:55:26 UTC
	Description: Debian repository created by build-recipe-livebuild
	Components: main
	EOF
    echo "SHA256:" >> Release
    for file in main/binary-${ARCH}/Packages* ; do
        local SUM=( $(sha256sum ${file}) )
        local SIZE=$(stat -c '%s' ${file})
        echo " ${SUM} ${SIZE} ${file}" >> Release
    done
    for file in main/source/Sources* ; do
        local SUM=( $(sha256sum ${file}) )
        local SIZE=$(stat -c '%s' ${file})
        echo " ${SUM} ${SIZE} ${file}" >> Release
    done
    popd >/dev/null

    # TODO: this is missing the signature with the private key

    popd >/dev/null
}

# This script expects that the $BUILD_ROOT is a Debian installation with
# live-build already installed!
#
# Variables:
# $BUILD_ROOT the Debian chroot
# $TOPDIR/SOURCES includes the live-build config tarball
# $TOPDIR/$LIVEBUILD_ROOT where live-build will be called
# $RECIPEFILE the name of the live-build config tarball

recipe_build_livebuild() {
    local ARCH=$($CHROOT su -c "dpkg-architecture -qDEB_BUILD_ARCH")
    local DIST=$($CHROOT su -c "lsb_release --codename" | awk '{ print $2 }')
    local LIVEBUILD_ROOT="LIVEBUILD_ROOT"

    [ -z "${ARCH}" -o -z "${DIST}" ] && cleanup_and_exit 1

    test -d $BUILD_ROOT/.build.binaries || cleanup_and_exit 1
    if test "$DO_INIT" = true -o ! -d "$BUILD_ROOT/.build.binaries/dists" ; then
	echo "creating repository metadata..."
        createrepo_debian $BUILD_ROOT/.build.binaries ${ARCH} ${DIST}
    fi

    # Write our default configuration variables
    mkdir -p $BUILD_ROOT/etc/live
    cat > $BUILD_ROOT/etc/live/build.conf <<-EOF
	LB_DEBIAN_INSTALLER_DISTRIBUTION="${DIST}"
	LB_DISTRIBUTION="${DIST}"
	LB_PARENT_DISTRIBUTION="${DIST}"
	LB_PARENT_DEBIAN_INSTALLER_DISTRIBUTION="${DIST}"
	LB_PARENT_MIRROR_BOOTSTRAP="file:/.build.binaries/"
	LB_PARENT_MIRROR_CHROOT="file:/.build.binaries/"
	LB_PARENT_MIRROR_CHROOT_SECURITY="file:/.build.binaries/"
	LB_PARENT_MIRROR_BINARY="file:/.build.binaries/"
	LB_PARENT_MIRROR_BINARY_SECURITY="file:/.build.binaries/"
	LB_PARENT_MIRROR_DEBIAN_INSTALLER="file:/.build.binaries/"
	LB_MIRROR_BOOTSTRAP="file:/.build.binaries/"
	LB_MIRROR_CHROOT="file:/.build.binaries/"
	LB_MIRROR_CHROOT_SECURITY="file:/.build.binaries/"
	LB_MIRROR_BINARY="file:/.build.binaries/"
	LB_MIRROR_BINARY_SECURITY="file:/.build.binaries/"
	LB_MIRROR_DEBIAN_INSTALLER="file:/.build.binaries/"
	LB_APT_SECURE="false"
	EOF

    # Expand live-build configuration to $TOPDIR/$LIVEBUILD_ROOT
    echo "Expanding live-build configuration"
    tar -xvf $BUILD_ROOT/$TOPDIR/SOURCES/$RECIPEFILE \
	-C $BUILD_ROOT/$TOPDIR/$LIVEBUILD_ROOT || cleanup_and_exit 1

    # Skip top-level directory if it matches recipe name, ...
    local files=($BUILD_ROOT/$TOPDIR/$LIVEBUILD_ROOT/*)
    # ... but ignore some well known names
    files=(${files[@]%%*/auto})
    files=(${files[@]%%*/config})
    files=(${files[@]%%*/local})
    if [ ${#files[@]} -eq 1 ] && \
	[ -d $BUILD_ROOT/$TOPDIR/$LIVEBUILD_ROOT/${RECIPEFILE%.livebuild} ]
    then
	LIVEBUILD_ROOT="LIVEBUILD_ROOT/${RECIPEFILE%.livebuild}"
    fi

    # Sanity check to not configure archives inside configuration
    files=($BUILD_ROOT/$TOPDIR/$LIVEBUILD_ROOT/config/archives/*)
    [ ${#files[@]} -gt 0 ] && cleanup_and_exit 1

    # TODO: Add the repository public key
    # cp ... $BUILD_ROOT/$TOPDIR/$LIVEBUILD_ROOT/config/archives/debian.key

    if [ -x $BUILD_ROOT/usr/lib/build/livebuild_pre_run ] ; then
	echo "Running OBS build livebuild_pre_run hook"
	$CHROOT su -c "/usr/lib/build/livebuild_pre_run" - root \
	    < /dev/null || cleanup_and_exit 1
    fi

    # TODO: this might move to lb auto/config file
    if [ -f $BUILD_ROOT/$TOPDIR/SOURCES/livebuild_pre_run ] ; then
	cp $BUILD_ROOT/$TOPDIR/SOURCES/livebuild_pre_run \
	    $BUILD_ROOT/.build.livebuild_pre_run
	chmod +x $BUILD_ROOT/.build.livebuild_pre_run
	echo "Running package livebuild_pre_run hook"
	$CHROOT su -c "/.build.livebuild_pre_run" - root \
	    < /dev/null || cleanup_and_exit 1
    fi

    $CHROOT su -c "cd $TOPDIR/$LIVEBUILD_ROOT && lb build" - root \
	< /dev/null || cleanup_and_exit 1

    # Move created product to destination
    for i in $BUILD_ROOT/$TOPDIR/$LIVEBUILD_ROOT/* ; do
	test -f "$i" || continue
	case "${i##*/}" in
	    *.iso)
		# all created files share the same name without suffix
		mv ${i%%.iso}.* $BUILD_ROOT/$TOPDIR/OTHER/.
		BUILD_SUCCEEDED=true
		;;
	    *)
		;;
	esac
    done

    # Fail the build if no ISO was created
    if [ -z "$(ls $BUILD_ROOT/$TOPDIR/OTHER/*.iso)" ] ; then
	echo "No ISO image found"
	cleanup_and_exit 1
    fi
}

recipe_resultdirs_livebuild() {
    # our results are already in OTHER
    :
}

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