Adding hooks and making replace_kernel function

live-build/functions

@@ -877,3 +877,17 @@ is_live_layer () {
     done
     return 1
 }
+
+replace_kernel () { 
+    mountpoint=$1
+    new_kernel=$2
+
+    # Install custom kernel (N.B. the trailing + retains linux-base during this
+    # operation)
+    env DEBIAN_FRONTEND=noninteractive chroot "${mountpoint}" apt-get \
+        remove --purge --assume-yes '^linux-.*' 'linux-base+'
+    env DEBIAN_FRONTEND=noninteractive chroot "${mountpoint}" apt-get \
+        update --assume-yes
+    env DEBIAN_FRONTEND=noninteractive chroot "${mountpoint}" apt-get \
+        install --assume-yes "${new_kernel}" 
+}

live-build/ubuntu-cpc/hooks.d/base/series/base

@@ -2,6 +2,7 @@ depends root-dir
 depends tarball
 depends squashfs
 depends disk-image
+depends kvm
 depends qcow2
 depends vmdk
 depends vagrant

live-build/ubuntu-cpc/hooks.d/base/series/kvm

@@ -0,0 +1,2 @@
+depends disk-image
+base/kvm-image.binary