Reimplemented as a util script with std lib only.

Reimplemented as a util script with std lib only.

Decision to add dependencies moved elsewhere. This script should be able to stand alone.

Add some docu on how to use compile.py

util/compile.py

@@ -0,0 +1,42 @@
+import shutil
+import subprocess
+from os import devnull, system
+from pathlib import Path
+
+source_dir = Path('kmk')
+build_dir = Path('build')
+
+
+def clean():
+    build_dir.mkdir(exist_ok=True)
+    for child in build_dir.iterdir():
+        if child.is_file():
+            child.unlink()
+        else:
+            shutil.rmtree(child)
+
+
+def compile():
+
+    shutil.copy2('boot.py', 'build/boot.py')
+
+    # Make sure the full folder heirarchy exists
+    for d in source_dir.glob('**/'):
+        if not build_dir.joinpath(d).exists():
+            Path.mkdir(build_dir.joinpath(d))
+
+    # Compile every python file
+    for x in source_dir.glob('**/*.py'):
+        out_path = str(build_dir.joinpath(x).with_suffix('.mpy'))
+        system(f'mpy-cross {x} -o {out_path}')
+
+
+if __name__ == '__main__':
+    try:
+        subprocess.run('mpy-cross', stdout=devnull, stderr=devnull)
+    except (FileNotFoundError):
+        print()
+        print('`mpy-cross` not found. Ensure mpy-cross is working from a shell.')
+        print()
+    clean()
+    compile()