build-recipe-docker

#################################################################
#
# Docker specific functions.
#
################################################################
#
# 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_docker() {
    TOPDIR="/usr/src/packages"
    test "$DO_INIT_TOPDIR" != false && rm -Rf "$BUILD_ROOT/$TOPDIR"
    mkdir -p "$BUILD_ROOT$TOPDIR/SOURCES"
    if test "$MYSRCDIR" = $BUILD_ROOT/.build-srcdir ; then 
        mv "$MYSRCDIR"/* $BUILD_ROOT$TOPDIR/SOURCES/
    else
        if test -z "$LINKSOURCES" ; then 
            cp -dLR "$MYSRCDIR"/* $BUILD_ROOT$TOPDIR/SOURCES/
        else
            cp -lR "$MYSRCDIR"/* $BUILD_ROOT$TOPDIR/SOURCES/
        fi
        if test "$?" != 0 ; then 
            cleanup_and_exit 1 "source copy failed"
        fi
    fi  
}

recipe_prepare_docker() {
    :
}

# Variables:
# $BUILD_ROOT is the chroot
# $TOPDIR/SOURCES includes the docker sources
# $TOPDIR/$DOCKERIMAGE_ROOT where docker will be called
# $RECIPEFILE the name of the Dockerfile

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

    base_image_path=
    base_image_tag=$(grep "^\s*FROM" "$RECIPEFILE" | head -n 1 | cut -d" " -f2)

    if test "$base_image_tag" != scratch ; then
	base_image_path=$(find containers -regextype egrep -regex ".*\.(tgz|tar|tar\.xz|tar\.gz)$" -print -quit)
	test -f "$base_image_path" || cleanup_and_exit 1 "base image not found"
    fi

    if test "$BUILDENGINE" = podman; then
        DOCKER_TOOL=podman
    else
        DOCKER_TOOL=docker
        if ! $BUILD_DIR/startdockerd --root "$BUILD_ROOT" --webserver "$TOPDIR/SOURCES/repos" ; then
             cleanup_and_exit 1
        fi
    fi
    DOCKERD_STARTED=true

    if test "$DOCKER_TOOL" = podman; then
	sed -e "s!^DATA_DIR=!DATA_DIR=$TOPDIR/SOURCES/repos!" <"$BUILD_DIR/obs-docker-support" >"$BUILD_ROOT/$TOPDIR/SOURCES/.obs-docker-support"
    else
	cp $BUILD_DIR/obs-docker-support "$BUILD_ROOT/$TOPDIR/SOURCES/.obs-docker-support"
    fi
    chmod 755 "$BUILD_ROOT/$TOPDIR/SOURCES/.obs-docker-support"

    if test -n "$base_image_path"; then
	echo "Loading base image"
	if test -L "$base_image_path" ; then
	    # copy into build root
	    cp -L "$base_image_path" "$base_image_path.lnk"
	    mv "$base_image_path.lnk" "$base_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 $base_image_path | grep -q "^manifest.json" ; then
	    echo "Layered image found"
	    chroot $BUILD_ROOT $DOCKER_TOOL load --input $TOPDIR/SOURCES/$base_image_path
	else
	    echo "Filesystem image found"
	    chroot $BUILD_ROOT $DOCKER_TOOL import $TOPDIR/SOURCES/$base_image_path "$base_image_tag"
	fi
    fi

    # Prepare the package repository
    if test -x $BUILD_ROOT/usr/bin/createrepo ; then
	chroot $BUILD_ROOT createrepo "$TOPDIR/SOURCES/repos" >/dev/null
    fi
    if test -x $BUILD_ROOT/usr/bin/dpkg-scanpackages ; then
	chroot $BUILD_ROOT bash -c "cd $TOPDIR/SOURCES/repos && dpkg-scanpackages -m . | gzip > Packages.gz"
    fi

    # find tags, first look into recipe file
    FIRSTTAG=
    ALLTAGS=
    args=()
    test -n "$RELEASE" && args=("${args[@]}" --release "$RELEASE")
    for t in $(perl -I$BUILD_DIR -MBuild::Docker -e Build::Docker::show -- "${args[@]}" "$BUILD_ROOT/$TOPDIR/SOURCES/$RECIPEFILE" containertags) ; do
	test -n "$FIRSTTAG" || FIRSTTAG="$t"
        ALLTAGS="$ALLTAGS $t"
    done
    # if we did not find a tag, look info a file called TAG
    if test -z "$FIRSTTAG" -a -f TAG ; then
	for t in $(egrep -v '^#' TAG) ; do
	    test -n "$FIRSTTAG" || FIRSTTAG="$t"
	    ALLTAGS="$ALLTAGS $t"
	done
    fi
    if test -z "$FIRSTTAG" ; then
        cleanup_and_exit 1 "please specify a tag for the container"
    fi
    ALLTAGS="${ALLTAGS# }"

    tagargs=()
    for t in $ALLTAGS; do
	tagargs[${#tagargs[@]}]='-t'
	tagargs[${#tagargs[@]}]="$t"
    done

    # patch in obs-docker-support helper
    sed -i '/^[ 	]*[fF][rR][oO][mM]/a COPY .obs-docker-support /usr/local/sbin/obs-docker-support\nRUN obs-docker-support --install' "$BUILD_ROOT/$TOPDIR/SOURCES/$RECIPEFILE"
    echo >> $BUILD_ROOT/$TOPDIR/SOURCES/$RECIPEFILE
    if test -n "$(sed -ne '/^[ 	]*[uU][sS][eE][rR][ 	]/p' "$BUILD_ROOT/$TOPDIR/SOURCES/$RECIPEFILE")" ; then
    	sed -i '1,/^[ 	]*[uU][sS][eE][rR][ 	]/{
/^[ 	]*[uU][sS][eE][rR][ 	]/i RUN obs-docker-support --uninstall
}' "$BUILD_ROOT/$TOPDIR/SOURCES/$RECIPEFILE"
    else
	echo 'RUN obs-docker-support --uninstall' >> "$BUILD_ROOT/$TOPDIR/SOURCES/$RECIPEFILE"
    fi
    test -n "$DISTURL" && echo "LABEL org.openbuildservice.disturl=$DISTURL" >> "$BUILD_ROOT/$TOPDIR/SOURCES/$RECIPEFILE"

    # now do the build
    squashopt=--squash
    if test "$DOCKER_TOOL" = podman -o -n "$(perl -I$BUILD_DIR -MBuild::Docker -e Build::Docker::show -- "$BUILD_ROOT/$TOPDIR/SOURCES/$RECIPEFILE" nosquash)" ; then
      squashopt=
      echo "Building image $ALLTAGS (nosquash)"
    else
      echo "Building image $ALLTAGS"
    fi


    if test "$DOCKER_TOOL" = podman ; then
        if ! $BUILD_DIR/call-podman --root "$BUILD_ROOT" build $squashopt -v "$TOPDIR/SOURCES/repos:$TOPDIR/SOURCES/repos" --network=host "${tagargs[@]}" -f "$TOPDIR/SOURCES/$RECIPEFILE" $TOPDIR/SOURCES/ ; then
	    cleanup_and_exit 1 "$DOCKER_TOOL build command failed"
	fi
    else
	if ! chroot $BUILD_ROOT $DOCKER_TOOL build $squashopt --network=host "${tagargs[@]}" -f "$TOPDIR/SOURCES/$RECIPEFILE" $TOPDIR/SOURCES/ ; then
	    cleanup_and_exit 1 "$DOCKER_TOOL build command failed"
	fi
    fi

    # Save the resulting image to a tarball. Use first tag for generating the file name.
    mkdir -p $BUILD_ROOT$TOPDIR/DOCKER
    FILENAME="$FIRSTTAG"
    FILENAME="${FILENAME//[\/:]/-}"
    FILENAME="$FILENAME.${BUILD_ARCH%%:*}"
    test -n "$RELEASE" && FILENAME="$FILENAME-$RELEASE"
    echo "Saving image $FIRSTTAG to $FILENAME.tar"
    if ! chroot $BUILD_ROOT $DOCKER_TOOL save --output "$TOPDIR/DOCKER/$FILENAME.tar" "$FIRSTTAG" ; then
        cleanup_and_exit 1 "$DOCKER_TOOL save command failed"
    fi
    
    # Create containerinfo
    args=()
    test -n "$DISTURL" && args=("${args[@]}" --disturl "$DISTURL")
    test -n "$RELEASE" && args=("${args[@]}" --release "$RELEASE")
    perl -I$BUILD_DIR -MBuild::Docker -e Build::Docker::showcontainerinfo -- "${args[@]}" "$BUILD_ROOT/$TOPDIR/SOURCES/$RECIPEFILE" "$FILENAME.tar" "$ALLTAGS" containers/annotation > "$BUILD_ROOT$TOPDIR/DOCKER/$FILENAME.containerinfo"

    # We're done. Clean up.
    recipe_cleanup_docker
    BUILD_SUCCEEDED=true
}

recipe_resultdirs_docker() {
    echo DOCKER
}

recipe_cleanup_docker() {
    if test -n "$DOCKERD_STARTED" ; then
	test -n "$TOPDIR" && rm -f "$BUILD_ROOT/$TOPDIR/SOURCES/.obs-docker-support"
	DOCKERD_STARTED=
	$BUILD_DIR/startdockerd --root "$BUILD_ROOT" --kill
    fi
}

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