feat(ostree-images): import river template files from wayblue

ostree-images/river/files/scripts/installsignedkernel.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+
+# Tell build process to exit if there are any errors.
+set -oue pipefail
+
+find /tmp/rpms
+
+rpm-ostree cliwrap install-to-root /
+
+QUALIFIED_KERNEL="$(rpm -qa | grep -P 'kernel-(\d+\.\d+\.\d+)' | sed -E 's/kernel-//')"
+INCOMING_KERNEL_VERSION="$(basename -s .rpm $(ls /tmp/rpms/kernel/kernel-[0-9]*.rpm 2>/dev/null | grep -P 'kernel-(\d+\.\d+\.\d+)' | sed -E 's/kernel-//'))"
+
+echo "Qualified kernel: $QUALIFIED_KERNEL"
+echo "Incoming kernel version: $INCOMING_KERNEL_VERSION"
+
+
+if [[ "$INCOMING_KERNEL_VERSION" != "$QUALIFIED_KERNEL" ]]; then
+    echo "Installing kernel rpm from kernel-cache."
+    rpm-ostree override replace \
+        --experimental \
+        --install=zstd \
+        /tmp/rpms/kernel/kernel-[0-9]*.rpm \
+        /tmp/rpms/kernel/kernel-core-*.rpm \
+        /tmp/rpms/kernel/kernel-modules-*.rpm
+else
+    echo "Installing kernel files from kernel-cache."
+    cd /tmp
+    rpm2cpio /tmp/rpms/kernel/kernel-core-*.rpm | cpio -idmv
+    cp ./lib/modules/*/vmlinuz /usr/lib/modules/*/vmlinuz
+    cd /
+fi