Decouple lighting_map from XAP

lib/python/qmk/lighting.py

@@ -0,0 +1,37 @@
+import re
+from pathlib import Path
+
+from qmk.json_schema import json_load
+
+
+def list_lighting_versions(feature):
+    """Return available versions - sorted newest first
+    """
+    ret = []
+    for file in Path('data/constants/lighting/').glob(f'{feature}_[0-9].[0-9].[0-9].hjson'):
+        ret.append(file.stem.split('_')[-1])
+
+    ret.sort(reverse=True)
+    return ret
+
+
+def load_lighting_spec(feature, version='latest'):
+    """Build lighting data from the requested spec file
+    """
+    if version == 'latest':
+        version = list_lighting_versions(feature)[0]
+
+    spec = json_load(Path(f'data/constants/lighting/{feature}_{version}.hjson'))
+
+    # preprocess for gross rgblight "mode + n"
+    for obj in spec.get('effects', {}).values():
+        define = obj['key']
+        offset = 0
+        found = re.match('(.*)_(\\d+)$', define)
+        if found:
+            define = found.group(1)
+            offset = int(found.group(2)) - 1
+        obj['define'] = define
+        obj['offset'] = offset
+
+    return spec