build-cross: repo step (dnf5 repository of the cross RPMs, REPO_UPLOAD)

#                  plus uImage and DTB

#  10. installer   RAM-bootable installer (initramfs as U-Boot ramdisk) with

#                  boards/<board>/installer/<board>-install and the images

#  not in the default run:

#      packages    the FenrirOS specs as RPMs (host rpmbuild, cross toolchain)

#      repo        those RPMs as dnf5 repository $WORK/repo/<arch> (REPO_UPLOAD)

#

# Usage:  ./build-cross.sh [step...]   (default: all steps in order)

#         ./build-cross.sh clean

ALL_STEPS=(headers systempp builtins toolchain fresh syslite kernel rootfs image installer)

# not in the default run: packages (needs the FenrirOS specs, FENRIR_FILES)

# repo: the RPMs of 'packages' as an rpm-md repository for dnf5 on the

# board, laid out as build-chroot.sh's (<repo>/<arch>/Packages, repodata/;

# fenriros.repo: .../fenriros/$basearch). Packages built before stay, so

# systems still find their dependencies; an update needs a higher

# Version-Release. createrepo_c is the x86 build chroot's (REPO_CHROOT).

# REPO_UPLOAD: rsync target, e.g. host:/srv/www/fenriros

step_repo() {

    local chroot="${REPO_CHROOT:-/build/$USER/systempp/build-chroot/chroot}"

    local repo="$WORK/repo" arch="$RPM_ARCH" rpm n=0

    [[ -x $chroot/usr/bin/createrepo_c ]] || die "no createrepo_c in $chroot (set REPO_CHROOT)"

    mkdir -p "$repo/$arch/Packages"

    for rpm in "$WORK"/rpmbuild/RPMS/*/*.rpm; do

        [[ -e $rpm ]] || continue

        if [[ ! -e $repo/$arch/Packages/${rpm##*/} || $rpm -nt $repo/$arch/Packages/${rpm##*/} ]]; then

            cp -p "$rpm" "$repo/$arch/Packages/"

            n=$((n + 1))

        fi

    done

    msg "repo: $n new or rebuilt RPMs, metadata for $repo/$arch"

    mkdir -p "$chroot/mnt/repo"

    run repo unshare -rm sh -c 'mount --bind "$1" "$2/mnt/repo" &&

        exec chroot "$2" /usr/bin/env -i PATH=/usr/bin:/bin createrepo_c --update --general-compress-type=zstd /mnt/repo' \

        sh "$repo/$arch" "$chroot"

    if [[ -n ${REPO_UPLOAD:-} ]]; then

        msg "repo: uploading to $REPO_UPLOAD"

        # the packages first, then the metadata that refers to them

        run repo rsync -a "$repo/" "$REPO_UPLOAD/" --exclude repodata

        run repo rsync -a --delete "$repo/$arch/repodata/" "$REPO_UPLOAD/$arch/repodata/"

    fi

    msg "repo ready: $repo/$arch"

}

steps=("$@")

((${#steps[@]})) || steps=("${ALL_STEPS[@]}")

for s in "${steps[@]}"; do

    case "$s" in

        headers|systempp|builtins|toolchain|fresh|syslite|kernel|rootfs|image|installer|packages)

        headers|systempp|builtins|toolchain|fresh|syslite|kernel|rootfs|image|installer|packages|repo)

            check_deps; mkdir -p "$WORK" "$BUILD"; "step_$s" ;;

        clean) step_clean ;;

        -h|--help) sed -n '2,/^$/s/^# \{0,1\}//p' "$0"; exit 0 ;;