CI: add simple runtime test

scripts/ci/autostart

@@ -0,0 +1 @@
+scripts/ci/ci_autostart.sh

scripts/ci/ci_autostart.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+if test -z "$LABWC_PID"; then
+	echo "LABWC_PID not set" >&2
+	exit 1
+fi
+
+echo "Running with pid $LABWC_PID"
+
+# Could add runtime tests here
+
+echo "killing labwc"
+kill -s TERM $LABWC_PID

scripts/ci/smoke-test.sh

@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+
+if ! test -x "$1/labwc"; then
+	echo "$1/labwc not found"
+	exit 1
+fi
+
+args=(
+	"$1/labwc"
+	-C scripts/ci
+	-d
+)
+
+export XDG_RUNTIME_DIR=$(mktemp -d)
+export WLR_BACKENDS=headless
+
+echo "Starting ${args[@]}"
+output=$("${args[@]}" 2>&1)
+ret=$?
+
+if test $ret -ge 128; then
+	# Not using -Db_sanitize=address,undefined
+	# because it slows down the usual execution
+	# way too much and spams pages over pages
+	# of irrelevant memory-still-in-use logs
+	# for external libraries.
+	#
+	# Not using coredumps either because they
+	# are a pain to setup on GH actions and
+	# just running labwc again is a lot faster
+	# anyway.
+
+	echo
+	echo "labwc crashed, restarting under gdb"
+	echo
+	gdb --batch                       \
+		-ex run                   \
+		-ex 'bt full'             \
+		-ex 'echo \n'             \
+		-ex 'echo "Local vars:\n' \
+		-ex 'info locals'         \
+		-ex 'echo \n'             \
+		-ex 'set listsize 50'     \
+		-ex list                  \
+		--args "${args[@]}"
+else
+	echo "$output"
+fi
+
+echo "labwc terminated with return code $ret"
+exit $ret