Improved netinstall kernel selection

helpers/DATA/base-installer/amd64.sh

@@ -0,0 +1,31 @@
+arch_get_kernel_flavour () {
+	echo amd64
+}
+
+arch_check_usable_kernel () {
+	if echo "$1" | grep -q -e "signed" -e "edge" -e "hwe-16.04"; then return 1; fi
+	if echo "$1" | grep -Eq -- "-(server|generic|virtual|xen|preempt|rt)(-.*)?$"; then return 0; fi
+
+	return 1
+}
+
+arch_get_kernel () {
+
+	echo "linux-generic"
+	echo "linux-image-generic"
+
+	echo "linux-server"
+	echo "linux-image-server"
+
+	echo "linux-virtual"
+	echo "linux-image-virtual"
+
+	echo "linux-xen"
+	echo "linux-image-xen"
+
+	echo "linux-preempt"
+	echo "linux-image-preempt"
+
+	echo "linux-rt"
+	echo "linux-image-rt"
+}

helpers/DATA/base-installer/i386.sh

@@ -0,0 +1,62 @@
+arch_get_kernel_flavour () {
+	# Should we offer an amd64 kernel?
+	if grep -q '^flags.*\blm\b' "$CPUINFO"; then
+		echo 686-pae amd64 686 586
+	# Should we offer a PAE kernel?
+	elif grep -q '^flags.*\bpae\b' "$CPUINFO"; then
+		echo 686-pae 686 586
+	# Should we offer a 686 kernel?
+	elif grep -q '^flags.*\bfpu\b.*\btsc\b.*\bcx8\b.*\bcmov\b' "$CPUINFO"; then
+		echo 686 586
+	else
+		echo 586
+	fi
+}
+
+arch_check_usable_kernel () {
+        if echo "$1" | grep -q -e "signed" -e "edge" -e "hwe-16.04"; then return 1; fi
+	local NAME="$1"
+
+	set -- $2
+	while [ $# -ge 1 ]; do
+		case "$1:$NAME" in
+		    *-dbg)
+			return 1
+			;;
+		    *-"$1"-pae)
+			# Don't allow -pae suffix, as this requires an
+			# extra CPU feature
+			;;
+		    *:*-"$1" | *:*-"$1"-*)
+			# Allow any other hyphenated suffix
+			return 0
+			;;
+		    686-*:*-generic | 686-*:*-generic-*)
+			return 0
+			;;
+		    686-*:*-virtual | 686-*:*-virtual-*)
+			return 0
+			;;
+		esac
+		shift
+	done
+	return 1
+}
+
+arch_get_kernel () {
+	imgbase="linux-image"
+
+	set -- $1
+	while [ $# -ge 1 ]; do
+		case $1 in
+		    686-*)
+			echo "linux-generic"
+			echo "linux-image-generic"
+			echo "linux-virtual"
+			echo "linux-image-virtual"
+			break
+			;;
+		esac
+		shift
+	done
+}