ci: add basic integration test for pmb

Yes, I know this is crude/basic, but others are welcome to improve it later. I think we need some integration testing asap, and this is better than nothing :D

.ci/integration.sh

@@ -6,29 +6,29 @@ if [ "$(id -u)" = 0 ]; then
 	exec su "${TESTUSER:-build}" -c "sh -e $0"
 fi
 
-pmaports="$(cd "$(dirname "$0")"/..; pwd -P)"
+pmbootstrap() {
+	./pmbootstrap.py --details-to-stdout "$@"
+}
+
 # Make sure that the work folder format is up to date, and that there are no
 # mounts from aborted test cases (pmbootstrap#1595)
 echo "Initializing pmbootstrap"
-if ! "yes '' | ./pmbootstrap.py \
-		--details-to-stdout \
-		init \
-		>/tmp/pmb_init 2>&1"; then
-	cat /tmp/pmb_init
+yes '' | ./pmbootstrap.py --details-to-stdout init
 
-./pmbootstrap.py work_migrate
-./pmbootstrap.py config aports "$pmaports"
-./pmbootstrap.py -q shutdown
+pmbootstrap work_migrate
+pmbootstrap -q shutdown
 
 # TODO: make device configurable?
 device="qemu-amd64"
 # TODO: make UI configurable?
 ui="phosh"
-./pmbootstrap.py config device "$device"
-./pmbootstrap.py config ui "$ui"
+pmbootstrap config device "$device"
+pmbootstrap config ui "$ui"
 
+# NOTE: --no-image is used because building images makes pmb try to
+# "modprobe loop". This fails in CI.
 echo "Building $ui image for $device"
-./pmbootstrap.py -y install --zap --password 147147
+pmbootstrap -y install --zap --password 147147 --no-image
 
 echo "Building $ui image for $device, with FDE"
-./pmbootstrap.py -y install --zap --password 147147 --fde
+pmbootstrap -y install --zap --password 147147 --fde --no-image