offload platformio building

This allows the repo to live on an SD card / USB jump drive.

stage2/platformio.ini

@@ -8,22 +8,27 @@
 ; Please visit documentation for the other options and examples
 ; https://docs.platformio.org/page/projectconf.html
 
-[env:adafruit_feather_m4]
-platform = atmelsam
-board = adafruit_feather_m4
-framework = arduino
+[platformio]
+workspace_dir = ~/.platformio/work/$PROJECT_HASH/stage2
+build_cache_dir = ~/.platformio/work/cache
 
-; 28: Adafruit NeoPixel library
-; 83: Adafruit RTClib
-; 571: Adafruit ILI9341 library
-lib_deps = SD, SPI, Wire, 28, 83, 571, arturo182/BBQ10Keyboard, 2082, 13, 6214
+[env]
+platform = atmelsam
+framework = arduino
+lib_deps =
+    adafruit/Adafruit BusIO @ ^1.7.1
+    adafruit/Adafruit GFX Library @ ^1.10.4
+    adafruit/Adafruit ILI9341 @ ^1.5.6
+    adafruit/Adafruit NeoPixel @ ^1.7.0
+    adafruit/Adafruit Zero DMA Library @ ^1.0.8
+    adafruit/RTClib @ ^1.12.4
+    arduino-libraries/SD @ ^1.2.4
+    arturo182/BBQ10Keyboard
+    SPI
+    Wire
+
+[env:adafruit_feather_m4]
+board = adafruit_feather_m4
 
 [env:adafruit_feather_m0]
-platform = atmelsam
 board = adafruit_feather_m0
-framework = arduino
-
-; 28: Adafruit NeoPixel library
-; 83: Adafruit RTClib
-; 571: Adafruit ILI9341 library
-lib_deps = SD, SPI, Wire, 28, 83, 571, arturo182/BBQ10Keyboard, 2082, 13, 6214

ulisp/platformio.ini

@@ -8,8 +8,15 @@
 ; Please visit documentation for the other options and examples
 ; https://docs.platformio.org/page/projectconf.html
 
-[env:adafruit_feather_m4]
+
+[platformio]
+workspace_dir = ~/.platformio/work/$PROJECT_HASH/stage2
+build_cache_dir = ~/.platformio/work/cache
+
+[env]
 platform = atmelsam
-board = adafruit_feather_m4
 framework = arduino
 lib_deps = arduino-libraries/SD
+
+[env:adafruit_feather_m4]
+board = adafruit_feather_m4