emu: add -r option to restart (and reload sources) when sources are changed

emu.sh

@@ -16,6 +16,16 @@ case "$1" in
         shift
         gdb --args ../vendor/micropython/unix/micropython $ARGS $* $MAIN
         ;;
+    "-r")
+        shift
+        while true; do
+            ../vendor/micropython/unix/micropython $ARGS $* $MAIN &
+            UPY_PID=$!
+            find -name '*.py' | inotifywait -q -e close_write --fromfile -
+            echo Restarting ...
+            kill $UPY_PID
+        done
+        ;;
     "-p")
         shift
         ../vendor/micropython/unix/micropython $ARGS $* $MAIN &