apps: software: Add support for user-defined applications

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>

apps/ReadMe.py

@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: LGPL-3.0-or-later
+# Copyright (C) 2021 Daniel Thompson
+"""Example of any automatically discovered application.
+
+Any python file (``.py`` or ``.mpy``) discovered in the ``apps/``
+directory will be automatically added to the Software application.
+"""
+
+import wasp
+
+class ReadMeApp():
+    NAME = "ReadMe"
+
+    def foreground(self):
+        draw = wasp.watch.drawable
+        draw.fill()
+        draw.string('Autoloaded from', 0, 96, width=240)
+        draw.string('apps/ReadMe.py', 0, 96+32, width=240)

wasp/apps/software.py

@@ -16,6 +16,7 @@ whilst still allowing users to activate so many awesome applications!
 
 import wasp
 import icons
+import os
 
 
 class SoftwareApp():
@@ -50,6 +51,20 @@ class SoftwareApp():
         db.append(('timer', factory('Timer')))
         db.append(('weather', factory('Weather')))
 
+        # Handle user-loaded applications
+        try:
+            for app in os.listdir('apps'):
+                name = None
+                if app.endswith('.py'):
+                    name = app[:-3]
+                if app.endswith('.mpy'):
+                    name = app[:-4]
+                if name:
+                    db.append((name, factory(name)))
+        except OSError:
+            # apps does not exist...
+            pass
+
         # Get the initial state for the checkboxes
         for _, checkbox in db:
             label = checkbox.label.replace(' ', '')