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#!/bin/bash
# SPDX-License-Identifier: LGPL-2.1-or-later
set -e

# shellcheck source=/dev/null
. /usr/lib/os-release
ID="${ID%-*}"

if [ ! -f "pkg/$ID/systemd.spec" ]; then
    echo "spec not found at pkg/$ID/systemd.spec, run mkosi once with -ff to make sure the spec is cloned" >&2
    exit 1
fi

if [ -d .git/ ] && [ -z "$(git status --porcelain)" ]; then
    TS="$(git show --no-patch --format=%ct HEAD)"
else
    TS="${SOURCE_DATE_EPOCH:-$(date +%s)}"
fi

# The openSUSE filelists hardcode the manpage compression extension. This causes rpmbuild errors since we
# disable manpage compression as the files cannot be found. Fix the issue by removing the compression
# extension.
find "pkg/$ID" -name "files.*" -exec sed --in-place 's/\.gz$//' {} \;

# Fix the %install override so debuginfo packages are generated.
tee --append /usr/lib/rpm/suse/macros <<'EOF'
%install %{debug_package}\
%%install\
%{nil}
EOF

VERSION="$(cat meson.version)"
RELEASE="$(date "+%Y%m%d%H%M%S" --date "@$TS")"

DIST="$(rpm --eval %dist)"
ARCH="$(rpm --eval %_arch)"
SRCDEST="/usr/src/debug/systemd-$VERSION-${RELEASE}${DIST}.$ARCH"

# TODO: Enable this when the opensuse spec stops unconditionally setting FORTIFY_SOURCE=2.
# EXTRA_CFLAGS="-O${OPTIMIZATION:-0} -Wp,-U_FORTIFY_SOURCE"
EXTRA_CFLAGS=""
if ((WITH_DEBUG)); then
    EXTRA_CFLAGS="$EXTRA_CFLAGS -ffile-prefix-map=../src=$SRCDEST"
fi

build() {
    IFS=
    # TODO: Replace meson_build and meson_install overrides with "--undefine __meson_verbose" once
    # https://github.com/mesonbuild/meson/pull/12835 is available.
    # shellcheck disable=SC2046
    rpmbuild \
        -bb \
        --build-in-place \
        --with upstream \
        $( ((WITH_TESTS)) || echo --nocheck) \
        --define "_topdir /var/tmp" \
        --define "_sourcedir pkg/$ID" \
        --define "_rpmdir $OUTPUTDIR" \
        ${BUILDDIR:+--define} \
        ${BUILDDIR:+"_vpath_builddir $BUILDDIR"} \
        --define "_build_name_fmt %%{NAME}-%%{VERSION}-%%{RELEASE}.%%{ARCH}.rpm" \
        --define "_binary_payload w.ufdio" \
        $( ((WITH_DEBUG)) || echo --define) \
        $( ((WITH_DEBUG)) || echo "debug_package %{nil}") \
        --define "vendor openSUSE" \
        --define "version_override $VERSION" \
        --define "release_override $RELEASE" \
        --define "__check_files sh -c '$(rpm --eval %__check_files) | tee /tmp/unpackaged-files'" \
        --define "build_cflags $(rpm --eval %build_cflags) $EXTRA_CFLAGS" \
        --define "meson_build %{shrink:%{__meson} compile -C %{_vpath_builddir} -j %{_smp_build_ncpus} %{nil}}" \
        --define "meson_install %{shrink:DESTDIR=%{buildroot} %{__meson} install -C %{_vpath_builddir} --no-rebuild --quiet %{nil}}" \
        --define "meson_extra_configure_options -D mode=developer -D b_sanitize=${SANITIZERS:-none}" \
        --define "__os_install_post /usr/lib/rpm/brp-suse %{nil}" \
        --define "__elf_exclude_path ^/usr/lib/systemd/tests/unit-tests/.*$" \
        --define "__script_requires %{nil}" \
        --define "_find_debuginfo_dwz_opts %{nil}" \
        --noclean \
        "$@" \
        "pkg/$ID/systemd.spec"
}

if ! build; then
    if [ ! -s /tmp/unpackaged-files ]; then
        exit 1
    fi

    # rpm will append to any existing systemd.lang so delete it explicitly so we don't get duplicate file
    # warnings.
    rm systemd.lang

    cat /tmp/unpackaged-files >>"pkg/$ID/files.systemd"
    build --noprep --nocheck
fi

cp "$OUTPUTDIR"/*.rpm "$PACKAGEDIR"