xcat-core/xCAT-genesis-builder/builddeb-genesis-base

#!/bin/bash
# Build xcat-genesis-base .deb package natively on Ubuntu.
# Must run as root on an Ubuntu system (22.04, 24.04, or 26.04).
# Parallel to buildrpm for EL targets.

set -euo pipefail

DIR=$(readlink -f "$(dirname "$0")")
BUILDARCH=$(dpkg --print-architecture)
TRIPLET=$(dpkg-architecture -qDEB_HOST_MULTIARCH)

case "$BUILDARCH" in
    amd64)   TARCH=x86_64 ;;
    ppc64el) TARCH=ppc64 ;;
    *)       echo "ERROR: unsupported architecture: $BUILDARCH" >&2; exit 1 ;;
esac

VERSION=$(cat "$DIR/../Version" 2>/dev/null || echo "2.18.0")
RELEASE=$(cat "$DIR/../Release" 2>/dev/null || echo "snap$(date +%Y%m%d%H%M)")
CODENAME=$(. /etc/os-release && echo "$VERSION_CODENAME")

echo "Building xcat-genesis-base for $BUILDARCH ($TARCH) on Ubuntu $CODENAME"

export DEBIAN_FRONTEND=noninteractive

REQUIRED_PACKAGES="
    dracut linux-image-generic
    ipmitool lldpad ethtool iproute2 kexec-tools screen
    openssh-server openssh-client rsyslog chrony
    nfs-common rpcbind pciutils usbutils parted
    dosfstools e2fsprogs lvm2 mdadm net-tools
    bc psmisc rsync wget cpio
    dpkg-dev debhelper fakeroot devscripts vim-tiny
"
if [ "$BUILDARCH" = "amd64" ]; then
    REQUIRED_PACKAGES="$REQUIRED_PACKAGES dmidecode efibootmgr"
fi

echo "Installing build dependencies..."
apt-get update -qq
apt-get install -y --no-install-recommends $REQUIRED_PACKAGES

# Set up dracut module
if [ -d /usr/lib/dracut/modules.d ]; then
    DRACUT_PARENT=/usr/lib/dracut/modules.d
elif [ -d /usr/share/dracut/modules.d ]; then
    DRACUT_PARENT=/usr/share/dracut/modules.d
else
    echo "ERROR: cannot find dracut modules directory" >&2
    exit 1
fi

DRACUTMODDIR=$DRACUT_PARENT/97xcat

GENESIS_TMPDIR=$(mktemp -d /tmp/xcat-genesis-deb.XXXXXX)
GENESIS_ROOT=$GENESIS_TMPDIR/opt/xcat/share/xcat/netboot/genesis/$TARCH
GENESIS_FS=$GENESIS_ROOT/fs
DRACUT_IMAGE=$GENESIS_TMPDIR/genesis.rfs

cleanup() {
    rm -rf "$GENESIS_TMPDIR" "$DRACUTMODDIR"
}
trap cleanup EXIT

rm -rf "$DRACUTMODDIR"
mkdir -p "$DRACUTMODDIR"
cp -a "$DIR/dracut_105/ubuntu/." "$DRACUTMODDIR/"
chmod 0755 "$DRACUTMODDIR/module-setup.sh" "$DRACUTMODDIR/xcatroot" "$DRACUTMODDIR/dhclient-script"

if [ "$BUILDARCH" != "amd64" ]; then
    sed -i '/efibootmgr dmidecode/d' "$DRACUTMODDIR/module-setup.sh"
fi

KERNELVERSION=$(ls -1 /lib/modules | sort -V | tail -n 1)
if [ -z "$KERNELVERSION" ]; then
    echo "ERROR: no kernel modules found in /lib/modules" >&2
    exit 1
fi

echo "Using kernel $KERNELVERSION"

mkdir -p "$GENESIS_FS/etc/ssh"
mkdir -p /run/rpcbind

echo "Running dracut..."
dracut --compress gzip -m "xcat base" --no-early-microcode -N -f "$DRACUT_IMAGE" "$KERNELVERSION"

echo "Extracting initramfs..."
(cd "$GENESIS_FS" && zcat "$DRACUT_IMAGE" | cpio -dumi)

for script in \
    "$GENESIS_FS/sbin/dhclient-script" \
    "$GENESIS_FS/usr/sbin/dhclient-script" \
    "$GENESIS_FS/sbin/xcatroot"
do
    [ -f "$script" ] && chmod 0755 "$script"
done

for perl_dir in \
    /usr/share/perl5 \
    "/usr/lib/$TRIPLET/perl5" \
    /usr/local/share/perl5 \
    "/usr/local/lib/$TRIPLET/perl5"
do
    if [ -d "$perl_dir" ]; then
        echo "Adding perl library $perl_dir"
        mkdir -p "$GENESIS_FS$perl_dir"
        cp -a "$perl_dir/." "$GENESIS_FS$perl_dir/"
    fi
done

mkdir -p "$GENESIS_FS/lib/udev/rules.d"
if [ -e /usr/lib/udev/rules.d/80-net-name-slot.rules ]; then
    cp /usr/lib/udev/rules.d/80-net-name-slot.rules "$GENESIS_FS/lib/udev/rules.d/"
elif [ -e /lib/udev/rules.d/80-net-name-slot.rules ]; then
    cp /lib/udev/rules.d/80-net-name-slot.rules "$GENESIS_FS/lib/udev/rules.d/"
elif [ -e "$DIR/80-net-name-slot.rules" ]; then
    cp "$DIR/80-net-name-slot.rules" "$GENESIS_FS/lib/udev/rules.d/"
fi

KERNEL_IMAGE=/boot/vmlinuz-$KERNELVERSION
if [ ! -e "$KERNEL_IMAGE" ]; then
    for candidate in \
        "/boot/vmlinux-$KERNELVERSION" \
        "/usr/lib/modules/$KERNELVERSION/vmlinuz" \
        "/lib/modules/$KERNELVERSION/vmlinuz" \
        "$(find /usr/lib/modules/"$KERNELVERSION" -maxdepth 2 -name 'vmlinuz*' -o -name 'vmlinux*' 2>/dev/null | head -n 1)" \
        "$(find /lib/modules/"$KERNELVERSION" -maxdepth 2 -name 'vmlinuz*' -o -name 'vmlinux*' 2>/dev/null | head -n 1)" \
        "$(ls -1 /boot/vmlinuz-* /boot/vmlinux-* 2>/dev/null | sort -V | tail -n 1)"
    do
        if [ -n "$candidate" ] && [ -e "$candidate" ]; then
            KERNEL_IMAGE="$candidate"
            break
        fi
    done
fi
if [ ! -e "$KERNEL_IMAGE" ]; then
    echo "ERROR: cannot find kernel image" >&2
    exit 1
fi
echo "Adding kernel $KERNEL_IMAGE"
cp "$KERNEL_IMAGE" "$GENESIS_ROOT/kernel"

find "$GENESIS_TMPDIR" -type c -delete

# Stage for dpkg-buildpackage
rm -rf "$DIR/opt"
cp -a "$GENESIS_TMPDIR/opt" "$DIR/"

# Adjust control file for target arch
sed -i "s/xcat-genesis-base-amd64/xcat-genesis-base-$BUILDARCH/g" "$DIR/debian/control"
sed -i "s/xcat-genesis-scripts-amd64/xcat-genesis-scripts-$BUILDARCH/g" "$DIR/debian/control"

PKG_VERSION="${VERSION}-${RELEASE}~${CODENAME}"
rm -f "$DIR/debian/changelog"
dch --create --package "xcat-genesis-base-$BUILDARCH" \
    --newversion "$PKG_VERSION" --distribution "$CODENAME" \
    --controlmaint -c "$DIR/debian/changelog" \
    "Native Ubuntu build on $CODENAME $BUILDARCH"

echo "Building .deb package..."
cd "$DIR"
dpkg-buildpackage -rfakeroot -uc -us -b

echo "Build complete. .deb files:"
ls -la "$DIR/../"xcat-genesis-base*.deb 2>/dev/null || echo "Check parent directory for .deb files"