Improved build system and upload process.

* The Sublime Text project now includes a `make upload` build system.
    * `make upload` now attempts to automatically detect the device, and the
      upload process will fail if it cannot be found.

Makefile

@@ -13,6 +13,8 @@ RM = rm
 BIN = bin
 SRC = ${PROJECT_NAME}
 
+TARGET=$(shell ${ARDUINO-CLI} board list | grep arduino:avr:leonardo | awk '{print $$1}')
+
 # credit: kenorb
 # https://stackoverflow.com/questions/18136918/how-to-get-current-relative-directory-of-your-makefile
 CWD := $(abspath $(patsubst %/,%,$(dir $(abspath $(lastword $(MAKEFILE_LIST))))))
@@ -45,4 +47,9 @@ compile:
 
 upload: compile
 	cd ${CWD}
-	${ARDUINO-CLI} upload --fqbn arduino:avr:leonardo --input-dir ${BIN} -p ${TARGET} ${PROJECT_NAME}
+	@if [ "$(strip ${TARGET})" = "" ]; then\
+		echo Arduboy could not be found. Is it plugged in and turned on\?;\
+		exit 1;\
+	else\
+		${ARDUINO-CLI} upload --fqbn arduino:avr:leonardo --input-dir ${BIN} -p ${TARGET} ${PROJECT_NAME};\
+	fi

Template.sublime-project

@@ -4,5 +4,12 @@
 		{
 			"path": "."
 		}
+	],
+	"build_systems":
+	[
+		{
+			"name": "Make - Upload",
+			"cmd": [ "make", "upload" ]
+		}
 	]
 }