File build-recipe-mkosi of Package build

#
# mkosi specific functions.
#
################################################################
#
# Copyright (c) 2022 Luca Boccassi <bluca@debian.org>
#
# 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_mkosi() {
    TOPDIR=/usr/src/packages
    test "$DO_INIT_TOPDIR" = false || rm -rf "$BUILD_ROOT$TOPDIR"
    for i in OTHER SOURCES ; do
        mkdir -p "$BUILD_ROOT$TOPDIR/$i"
    done
    if test "$MYSRCDIR" = "$BUILD_ROOT/.build-srcdir" ; then
        mv "$MYSRCDIR"/* "$BUILD_ROOT$TOPDIR/SOURCES/"
    else
        copy_sources "$MYSRCDIR" "$BUILD_ROOT$TOPDIR/SOURCES/"
        #cp -r "$MYSRCDIR/mkosi.cache" "$BUILD_ROOT$TOPDIR/SOURCES/"
    fi
    chown -hR "$ABUILD_UID:$ABUILD_GID" "$BUILD_ROOT$TOPDIR"
}

recipe_prepare_mkosi() {
    :
}

recipe_build_mkosi() {
    local ARCH DIST RELEASE_ARG
    if [ -x "$BUILD_ROOT/bin/rpm" ]; then
        ARCH=$(chroot "$BUILD_ROOT" sh -c "rpm --eval '%{_target_cpu}'")
    elif [ -x "$BUILD_ROOT/usr/bin/dpkg-architecture" ]; then
        ARCH=$(chroot "$BUILD_ROOT" sh -c "dpkg-architecture -qDEB_BUILD_ARCH")
        # The distro release is usually specified in the recipe, but it is not mandatory.
        DIST=$(grep Release= "${RECIPEFILE}" | sed "s/\s*Release\s*=\s*\(.*\)\s*/\1/")
        if [ -z "$DIST" ]; then
            DIST=$(chroot "$BUILD_ROOT" sh -c "lsb_release --codename" | awk '{ print $2 }')
        fi

        # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=845651
        # For our use case it makes sense to always return the testing codename. In
        # the example cited in the above bug, the metadata for sid would be incorrect
        # anyway, and we would want the ones for potato.
        if test "${DIST}" = "n/a" ; then
            DIST=$(chroot "$BUILD_ROOT" sh -c "sed 's/\(.*\)\/.*/\1/' /etc/debian_version")
        fi

        # Pass it to mkosi, so that the configured mirror is the same as the repository created below
        RELEASE_ARG="--release ${DIST}"

        test -z "${ARCH}" -o -z "${DIST}" && cleanup_and_exit 1
    elif [ ! -x "$BUILD_ROOT/usr/bin/repo-add" ]; then
        cleanup_and_exit 1
    fi

    test -d "$BUILD_ROOT/.build.binaries" || cleanup_and_exit 1 "missing $BUILD_ROOT/.build.binaries"

    if test "$DO_INIT" = true; then
        if [ -x "$BUILD_ROOT/usr/bin/dpkg-architecture" ] && [ ! -d "$BUILD_ROOT/.build.binaries/dists" ]; then
            echo "creating debian repository metadata..."
            createrepo_debian "$BUILD_ROOT/.build.binaries" "${ARCH}" "${DIST}"
        elif [ -x "$BUILD_ROOT/bin/rpm" ] && [ ! -d "$BUILD_ROOT/.build.binaries/repodata" ]; then
            echo "creating rpm repository metadata..."
            if chroot "$BUILD_ROOT" test -x /usr/bin/createrepo_c; then
                chroot "$BUILD_ROOT" /usr/bin/createrepo_c /.build.binaries
            elif chroot "$BUILD_ROOT" test -x /usr/bin/createrepo; then
                chroot "$BUILD_ROOT" /usr/bin/createrepo /.build.binaries
            else
                cleanup_and_exit 1 "No createrepo found in build root"
            fi
        elif [ -x "$BUILD_ROOT/usr/bin/repo-add" ]; then
            echo "creating Arch Linux repository metadata..."
            chroot "$BUILD_ROOT" sh -c "repo-add /.build.binaries/core.db.tar.gz /.build.binaries/*"
        fi
    fi

    local image_version=""
    if [ -n "$RELEASE" ]; then
        image_version="--image-version=${RELEASE}"
    fi
    chroot "$BUILD_ROOT" sh -c \
        "cd $TOPDIR/SOURCES && mkosi --default $RECIPEFILE $RELEASE_ARG $image_version --nspawn-keep-unit --output-dir $TOPDIR/OTHER --checksum --repository-key-check=no --with-network=never --local-mirror file:///.build.binaries/ --cache /.build.binaries/ build" \
        || cleanup_and_exit 1

    # move the output files from the subdirectory, as only files in the OTHER/ directory
    # are published, but they get deposited in OTHER/$DIST~$RELEASE/
    for d in "$BUILD_ROOT/$TOPDIR"/OTHER/*/; do
        if [ ! -d "$d" ]; then
            continue
        fi
        mv "$d"/* "$BUILD_ROOT/$TOPDIR/OTHER/"
        rmdir "$d"
    done

    # copy recipe source file so that it can be published
    cp "$BUILD_ROOT/$TOPDIR/SOURCES/$RECIPEFILE" \
        "$BUILD_ROOT/$TOPDIR/OTHER/"

    # compress the manifest file which can be quite large
    gzip -9 -f "$BUILD_ROOT/$TOPDIR/OTHER/"*.manifest

    # shellcheck disable=SC2034
    BUILD_SUCCEEDED=true
}

recipe_resultdirs_mkosi() {
    :
}

recipe_cleanup_mkosi() {
    :
}