test: Record CI and demo videos in Xvfb by default, fix demo setup sequence

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

test/demo/pasta

@@ -256,6 +256,7 @@ sleep	2
 killp	PASST
 killp	HOST
 sleep	2
+ns	cd __TEMPDIR__
 nsb	perf report -g --max-stack 3
 sleep	10
 

test/lib/layout

@@ -208,6 +208,7 @@ layout_demo_pasta() {
 	sleep 3
 
 	tmux kill-pane -a -t 0
+	cmd_write 0 cd ${BASEPATH}
 	cmd_write 0 clear
 	sleep 1
 	cmd_write 0 clear
@@ -244,6 +245,7 @@ layout_demo_passt() {
 	sleep 3
 
 	tmux kill-pane -a -t 0
+	cmd_write 0 cd ${BASEPATH}
 	cmd_write 0 clear
 	sleep 1
 	cmd_write 0 clear

test/lib/setup

@@ -305,6 +305,29 @@ teardown_two_guests() {
 	pane_wait PASST_2
 }
 
+# teardown_demo_passt() - Exit namespace, kill qemu, passt and pasta
+teardown_demo_passt() {
+	tmux send-keys -t ${PANE_GUEST} "C-c"
+	pane_wait GUEST
+	tmux send-keys -t ${PANE_GUEST} "C-d"
+
+	tmux send-keys -t ${PANE_HOST} "C-d"
+
+	tmux send-keys -t ${PANE_PASST} "C-c"
+	pane_wait PASST
+	tmux send-keys -t ${PANE_PASST} "C-d"
+
+	pane_wait GUEST
+	pane_wait HOST
+	pane_wait PASST
+}
+
+# teardown_demo_pasta() - Exit namespace from remaining pane
+teardown_demo_pasta() {
+	tmux send-keys -t ${PANE_NS} "C-d"
+	pane_wait NS
+}
+
 # setup() - Run setup_*() functions
 # $*:	Suffix list of setup_*() functions to be called
 setup() {

test/lib/term

@@ -529,15 +529,24 @@ pause_continue() {
 # run_term() - Start tmux session, X terminal if requested, running entry point
 run_term() {
 	export SHELL="/bin/sh"
+	tmux set-option -g default-shell "/bin/sh"
 
 	if [ ${CI} -eq 1 ]; then
 		__xterm_done="$(mktemp)"
+		if [ ${XVFB} -eq 1 ]; then
+			xvfb-run -s "-screen 0 4000x4000x24 -ac" ${CI_XTERM} "$(pwd)" -e "sh -c \"printf '\e[8;50;240t'; tmux new-session -s passt_test ./ci from_term; echo >${__xterm_done}\""
+		else
 			${CI_XTERM} "$(pwd)" -e "sh -c \"printf '\e[8;50;240t'; tmux new-session -s passt_test ./ci from_term; echo >${__xterm_done}\""
+		fi
 		while ! [ -s "${__xterm_done}" ]; do sleep 1; done
 		rm "${__xterm_done}"
 	elif [ ${DEMO} -eq 1 ]; then
 		while true; do
+			if [ ${XVFB} -eq 1 ]; then
+				xvfb-run -s "-screen 0 4000x4000x24 -ac" ${DEMO_XTERM} "$(pwd)" -e sh -c 'tmux new-session -s passt_test ./run_demo from_term'
+			else
 				${DEMO_XTERM} "$(pwd)" -e sh -c 'tmux new-session -s passt_test ./run_demo from_term'
+			fi
 			[ $? -ne 0 ] && { tmux kill-session -t passt_test; continue; }
 			break
 		done

test/lib/video

@@ -73,17 +73,23 @@ video_grab() {
 
 	echo "${VIDEO_LINKS_TEMPLATE}" > "${BASEPATH}/${VIDEO_NAME}.js"
 
+	if [ ${XVFB} -eq 1 ]; then
+		# Grab the geometry of the first window that's at least 100px wide
+		eval $(xwininfo -d :99.0 -root -tree | sed -n 's/^[ ]*0x[0-f]*[^0-9]*\([0-9]\{3,\}\)x\([0-9]*\)+\([0-9]*\)+\([0-9]*\).*/__width=\1; __height=\2; __x=\3; __y=\4;/p')
+	else
 		__x=$(xwininfo -id $(xdotool getactivewindow) | sed -n 's/[ ]*Absolute upper-left X:[ ]*\([0-9]*\)$/\1/p')
 		__y=$(xwininfo -id $(xdotool getactivewindow) | sed -n 's/[ ]*Absolute upper-left Y:[ ]*\([0-9]*\)$/\1/p')
 		__width=$(xwininfo -id $(xdotool getactivewindow) | sed -n 's/[ ]*Width:[ ]*\([0-9]*\)$/\1/p')
 		__height=$(xwininfo -id $(xdotool getactivewindow) | sed -n 's/[ ]*Height:[ ]*\([0-9]*\)$/\1/p')
+	fi
 
 	[ $((__width % 2)) ]  && __width=$((__width - 1))
 	[ $((__height % 2)) ] && __height=$((__height - 1))
 
 	sleep 3
 	VIDEO_START_SECONDS=$(sed -n 's/\([0-9]*\).[0-9]* [0-9]*.[0-9]*/\1/p' /proc/uptime)
-	ffmpeg -f x11grab -framerate 15 -video_size "${__width}x${__height}" -i "+${__x},${__y}" -vcodec libx264 -preset ultrafast -qp 0 -pix_fmt yuv444p -draw_mouse 0 "${BASEPATH}/${VIDEO_NAME}.mp4" & echo $! > "${FFMPEG_PID_FILE}"
+	[ ${XVFB} -eq 1 ] && __disp=":99.0" || __disp=
+	ffmpeg -f x11grab -framerate 15 -video_size "${__width}x${__height}" -i "${__disp}+${__x},${__y}" -vcodec libx264 -preset ultrafast -qp 0 -pix_fmt yuv444p -draw_mouse 0 "${BASEPATH}/${VIDEO_NAME}.mp4" & echo $! > "${FFMPEG_PID_FILE}"
 }
 
 # video_time_now() - Print current video timestamp, in seconds

test/run

@@ -35,6 +35,9 @@ DEBUG=${DEBUG:-0}
 # If set, tell passt and pasta to take packet captures
 PCAP=${PCAP:-0}
 
+# If set, run X terminals for CI and demos in Xvfb
+XVFB=${XVFB:-1}
+
 COMMIT="$(git log --oneline --no-decorate -1)"
 
 . lib/util
@@ -117,7 +120,7 @@ demo() {
 	MODE=passt
 	test demo
 	video_stop 0
-	tmux send-keys -t ${PANE_GUEST} "C-c"
+	teardown demo_passt
 
 	layout_demo_pasta
 	video_grab demo_pasta
@@ -149,6 +152,8 @@ else
 	trap "" EXIT
 fi
 
+[ ${DEMO} -eq 1 ] && exit 0
+
 tail -n1 ${LOGFILE}
 echo "Log at ${LOGFILE}"
 exit $(tail -n1 ${LOGFILE} | sed -n 's/.*FAIL: \(.*\)$/\1/p')