Begin to outfactor how to pull preferences from Arduino

etc/kaleidoscope-builder.conf

@@ -61,18 +61,25 @@ find_max_prog_size() {
 find_device_vid_pid() {
 # SKETCH and -build-path in this command are here because of a bug introduced in Arduino 1.8.10
 # https://github.com/arduino/arduino-builder/issues/341
-    VPIDS=$("${ARDUINO_BUILDER}" \
+    VPIDS=$(dump_arduino_prefs | grep "\.[vp]id=")
+    VID=${VID:-$(echo "${VPIDS}" | grep build.vid= | cut -dx -f2)}
+    SKETCH_PID=${SKETCH_PID:-$(echo "${VPIDS}" | grep build.pid= | cut -dx -f2)}
+    BOOTLOADER_PID=${BOOTLOADER_PID:-$(echo "${VPIDS}" | grep bootloader.pid= | cut -dx -f2)}
+    BOOTLOADER_VID=${BOOTLOADER_VID:-$(echo "${VPIDS}" | grep bootloader.vid= | cut -dx -f2)}
+}
+
+
+dump_arduino_prefs() {
+    prefs=$("${ARDUINO_BUILDER}" \
 		-hardware "${ARDUINO_PATH}/hardware" \
 		-hardware "${BOARD_HARDWARE_PATH}" \
 		${ARDUINO_TOOLS_FLAG:+"${ARDUINO_TOOLS_FLAG}"} ${ARDUINO_TOOLS_PARAM:+"${ARDUINO_TOOLS_PARAM}"} \
 		-tools "${ARDUINO_PATH}/tools-builder" \
 		-fqbn "${FQBN}" \
 	 	-build-path "${ARDUINO_PATH}" \
-   		-dump-prefs  "${SKETCH_DIR}/${SKETCH}.ino" | grep "\.[vp]id=")
+   		-dump-prefs  "${SKETCH_DIR}/${SKETCH}.ino" )
-    VID=${VID:-$(echo "${VPIDS}" | grep build.vid= | cut -dx -f2)}
+    echo "$prefs"
-    SKETCH_PID=${SKETCH_PID:-$(echo "${VPIDS}" | grep build.pid= | cut -dx -f2)}
+
-    BOOTLOADER_PID=${BOOTLOADER_PID:-$(echo "${VPIDS}" | grep bootloader.pid= | cut -dx -f2)}
-    BOOTLOADER_VID=${BOOTLOADER_VID:-$(echo "${VPIDS}" | grep bootloader.vid= | cut -dx -f2)}
 }
 
 find_device_port() {