#################################################################
#
# Fissile specific functions.
#
# Author: Tim Hardeck (thardeck@suse.de), Dimitris Karakasilis (dkarakasilis@suse.com)
#
################################################################
#
# Copyright (c) 2017 SUSE Linux Products GmbH
#
# 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
#
################################################################

DOCKERD_STARTED=

recipe_setup_fissile() {
    TOPDIR="/usr/src/packages"
    mkdir -p "$BUILD_ROOT$TOPDIR/SOURCES"
    cp -R * $BUILD_ROOT$TOPDIR/SOURCES/
}

recipe_prepare_fissile() {
    :
}

# Variables:
# $BUILD_ROOT is the chroot
# $TOPDIR/SOURCES includes the fissile sources
# $TOPDIR/$DOCKERIMAGE_ROOT where docker will be called
# $RECIPEFILE equals fissile.yml

recipe_build_fissile() {
    touch $BUILD_ROOT/etc/resolv.conf

    docker_image_path=$(find containers -regextype egrep -regex ".*\.(tgz|tar|tar\.xz|tar\.gz)$" -print -quit)
    test -f "$docker_image_path" || cleanup_and_exit 1 "docker image not found"

    if ! $BUILD_DIR/startdockerd --root "$BUILD_ROOT"; then
	cleanup_and_exit 1
    fi
    DOCKERD_STARTED=true

    echo "Loading docker image"
    if test -L "$docker_image_path" ; then
	# copy into build root
	cp -L "$docker_image_path" "$docker_image_path.lnk"
	mv "$docker_image_path.lnk" "$docker_image_path"
    fi

    # Inspect the content of the image to decide if this is a layered image
    # or a filesystem one. We need to know if we will "docker load" it or
    # "docker import" it.
    if tar -tf $docker_image_path | grep "^manifest.json" -q; then
        echo "Layered image found"
        chroot $BUILD_ROOT docker load --input $TOPDIR/SOURCES/$docker_image_path
    else
      # We allow more than one docker image dependencies so we can't map
      # the tarballs to image names (in fissile.yml). Let it break if the
      # images are not layered but consider some solution based on the tarball
      # names (TODO)
      cleanup_and_exit 1 "Docker images are not layered. No way to map to image name/tags."
    fi
  
    cd $BUILD_ROOT/$TOPDIR/SOURCES
    # Extract the release directory.
    if [ -f release.tar.xz ]; then
	tar -xf release.tar.xz
    else
	cleanup_and_exit 1 "Couldn't find the release source tarball. Check your _service file if you use one."
    fi

    # Move cached bosh tarballs to the directory where fissile will look
    export FISSILE_CACHE_DIR=/root/.bosh/cache/
    mkdir -p $BUILD_ROOT$FISSILE_CACHE_DIR
    find . -maxdepth 1 -regextype posix-egrep -regex '.{40,}' -exec cp -t $BUILD_ROOT$FISSILE_CACHE_DIR {} +

    cd release
    # Extract cached release ymls to their locations.
    if [ -f ../yml-cache.tar.gz ]; then
	tar -xf ../yml-cache.tar.gz
    fi

    # TODO: Remove this hackery when we use a later runc package (that already provides this symlink)
    ln -fs /usr/sbin/runc $BUILD_ROOT/usr/bin/docker-runc

    echo "Building packages with fissile"
    if ! chroot $BUILD_ROOT /bin/bash -c "cd $TOPDIR/SOURCES/release && . .envrc && fissile build packages --docker-network-mode host"; then
	cleanup_and_exit 1 "fissile build packages failed"
    fi

    echo "Building images with fissile"
    if ! chroot $BUILD_ROOT /bin/bash -c "cd $TOPDIR/SOURCES/release && . .envrc && fissile build images"; then
	cleanup_and_exit 1 "fissile build images failed"
    fi

    # Save the resulting images to tarballs.
    mkdir -p $BUILD_ROOT$TOPDIR/FISSILE
    non_built_images=$(perl -MYAML::XS -e "print join('|', @{YAML::XS::LoadFile('$BUILD_ROOT$TOPDIR/SOURCES/fissile.yml')->{'DockerImageDeps'}})")

    for image in $(chroot $BUILD_ROOT docker images --format "{{.Repository}}:{{.Tag}}" | grep -v $non_built_images); do
        echo "Saving image $image"
        filename=$(echo $image | sed 's/\//_/g')
        if ! chroot $BUILD_ROOT docker save --output "$TOPDIR/FISSILE/$filename.tar" "$image" ; then
	    cleanup_and_exit 1 "Docker save command failed"
        fi
	# Create containerinfo
	disturlarg=()
 	test -n "$DISTURL" && disturlarg=("--disturl" "$DISTURL")
	perl -I$BUILD_DIR -MBuild::Docker -e Build::Docker::showcontainerinfo -- "${disturlarg[@]}" '' "$filename.tar" "$image" containers/annotation> "$BUILD_ROOT$TOPDIR/FISSILE/$filename.containerinfo"
    done

    recipe_cleanup_fissile

    BUILD_SUCCEEDED=true
}

recipe_resultdirs_fissile() {
    echo FISSILE
}

recipe_cleanup_fissile() {
    if test -n "$DOCKERD_STARTED" ; then
	DOCKERD_STARTED=
	$BUILD_DIR/startdockerd --root "$BUILD_ROOT" --kill
    fi
}

# Local Variables:
# mode: Shell-script
# End: