Add incus autodetect

lib/tiny-cloud/cloud/incus/autodetect

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+test -e "$ROOT"/dev/incus/sock && echo "10 incus"

tests/init.test

@@ -25,6 +25,7 @@ init_tests \
 	userdata_type \
 	run_userdata \
 	autodetect_unknown \
+	autodetect_incus \
 	autodetect_nocloud_cmdline \
 	autodetect_nocloud_dmi \
 	autodetect_nocloud_volume
@@ -236,6 +237,14 @@ autodetect_unknown_body() {
 		sh -c ". \"$lib\"; echo \$CLOUD"
 }
 
+autodetect_incus_body() {
+	mkdir -p dev/incus
+	touch dev/incus/sock
+	atf_check \
+		-o match:"incus" \
+		sh -c ". \"$lib\"; echo \$CLOUD"
+}
+
 autodetect_nocloud_cmdline_body() {
 	mkdir -p proc
 	echo "quiet ds=nocloud;s=https://10.42.42.42/ console=ttyS0" > proc/cmdline