wasp: Automatically generate watch.py for PineTime

This should ensure that main.py is always up to date.

.gitignore

@@ -4,3 +4,4 @@
 __pycache__
 docs/build
 attic/
+wasp/boards/pinetime/watch.py

Makefile

@@ -27,7 +27,7 @@ bootloader:
 softdevice:
 	micropython/ports/nrf/drivers/bluetooth/download_ble_stack.sh
 
-micropython:
+micropython: wasp/boards/pinetime/watch.py
 	$(MAKE) -C micropython/mpy-cross
 	$(RM) micropython/ports/nrf/build-$(BOARD)-s132/frozen_content.c
 	$(MAKE) -C micropython/ports/nrf \
@@ -39,6 +39,10 @@ micropython:
 		--application micropython/ports/nrf/build-$(BOARD)-s132/firmware.hex \
 		micropython.zip
 
+wasp/boards/pinetime/watch.py : wasp/boards/pinetime/watch.py.in
+	(cd wasp; ../tools/preprocess.py boards/pinetime/watch.py.in > \
+		                         boards/pinetime/watch.py)
+
 dfu:
 	python3 -m nordicsemi dfu serial --package micropython.zip --port /dev/ttyACM0
 

tools/preprocess.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python
+
+# SPDX-License-Identifier: LGPL-3.0-or-later
+# Copyright (C) 2020 Daniel Thompson
+"""Quick and dirty macro processor.
+
+Currently the only support macro is #include!
+"""
+
+import sys
+
+def preprocess(fname):
+    with open(fname) as f:
+        for ln in f.readlines():
+            ln = ln.rstrip()
+
+            macro = ln.lstrip()
+            if macro.startswith('#include'):
+                exec(macro[1:])
+            else:
+                print(ln)
+
+def include(fname):
+    preprocess(fname)
+
+for arg in sys.argv[1:]:
+    preprocess(arg)

wasp/boards/pinetime/watch.py.in

@@ -84,9 +84,7 @@ except AttributeError:
     os.mount(flash,'/flash')
     with open('/flash/main.py', 'w') as f:
         f.write('''\
-import manager
-wasp = manager.Manager(watch)
-wasp.run()
+#include('main.py')
 ''')
 
 # Only change directory if the button is not pressed (this will