Allow codegen of keymap.json => keymap.c without requiring layers/layout etc.

builddefs/build_keyboard.mk

@@ -189,7 +189,10 @@ endif
 # Have we found a keymap.json?
 ifneq ("$(wildcard $(KEYMAP_JSON))", "")
     ifneq ("$(wildcard $(KEYMAP_C))", "")
-        $(call WARNING_MESSAGE,Keymap is specified as both keymap.json and keymap.c -- keymap.json file wins.)
+        # Allow a separately-found keymap.c next to keymap.json -- the keymap.c
+        # generator will include the other keymap.c in the process, if supplied.
+        OTHER_KEYMAP_C := $(KEYMAP_C)
+        OPT_DEFS += -DOTHER_KEYMAP_C=\"$(OTHER_KEYMAP_C)\"
     endif
 
     KEYMAP_PATH := $(KEYMAP_JSON_PATH)

data/schemas/keymap.jsonschema

@@ -72,10 +72,5 @@
         "notes": {
             "type": "string"
         }
-    },
-    "required": [
-        "keyboard",
-        "layout",
-        "layers"
-    ]
+    }
 }

lib/python/qmk/commands.py

@@ -55,7 +55,7 @@ def parse_configurator_json(configurator_file):
         cli.log.error(f'Invalid JSON keymap: {configurator_file} : {e.message}')
         maybe_exit(1)
 
-    keyboard = user_keymap['keyboard']
+    keyboard = user_keymap.get('keyboard', None)
     aliases = keyboard_alias_definitions()
 
     while keyboard in aliases:

lib/python/qmk/keymap.py

@@ -29,38 +29,39 @@
  * This file was generated by qmk json2c. You may or may not want to
  * edit it directly.
  */
-const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
-__KEYMAP_GOES_HERE__
-};
 
-#if defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
-const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {
+__KEYMAP_GOES_HERE__
 __ENCODER_MAP_GOES_HERE__
-};
-#endif // defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
-
 __MACRO_OUTPUT_GOES_HERE__
+
+#ifdef OTHER_KEYMAP_C
+#    if __has_include_next(OTHER_KEYMAP_C)
+#        include_next OTHER_KEYMAP_C
+#    endif // __has_include_next(OTHER_KEYMAP_C)
+#endif // OTHER_KEYMAP_C
 """
 
 
 def _generate_keymap_table(keymap_json):
-    lines = []
+    lines = ['const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {']
     for layer_num, layer in enumerate(keymap_json['layers']):
         if layer_num != 0:
             lines[-1] = lines[-1] + ','
         layer = map(_strip_any, layer)
         layer_keys = ', '.join(layer)
         lines.append('    [%s] = %s(%s)' % (layer_num, keymap_json['layout'], layer_keys))
+    lines.append('};')
     return lines
 
 
 def _generate_encodermap_table(keymap_json):
-    lines = []
+    lines = ['#if defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)', 'const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {']
     for layer_num, layer in enumerate(keymap_json['encoders']):
         if layer_num != 0:
             lines[-1] = lines[-1] + ','
         encoder_keycode_txt = ', '.join([f'ENCODER_CCW_CW({_strip_any(e["ccw"])}, {_strip_any(e["cw"])})' for e in layer])
         lines.append('    [%s] = {%s}' % (layer_num, encoder_keycode_txt))
+    lines.extend(['};', '#endif // defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)'])
     return lines
 
 
@@ -271,8 +272,11 @@ def generate_c(keymap_json):
             A sequence of strings containing macros to implement for this keyboard.
     """
     new_keymap = DEFAULT_KEYMAP_C
-    layer_txt = _generate_keymap_table(keymap_json)
-    keymap = '\n'.join(layer_txt)
+
+    keymap = ''
+    if 'layers' in keymap_json and keymap_json['layers'] is not None:
+        layer_txt = _generate_keymap_table(keymap_json)
+        keymap = '\n'.join(layer_txt)
     new_keymap = new_keymap.replace('__KEYMAP_GOES_HERE__', keymap)
 
     encodermap = ''

lib/python/qmk/tests/test_cli_commands.py

@@ -155,17 +155,18 @@ def test_json2c():
  * This file was generated by qmk json2c. You may or may not want to
  * edit it directly.
  */
+
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     [0] = LAYOUT_ortho_1x1(KC_A)
 };
 
-#if defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
-const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {
-
-};
-#endif // defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
 
 
+#ifdef OTHER_KEYMAP_C
+#    if __has_include_next(OTHER_KEYMAP_C)
+#        include_next OTHER_KEYMAP_C
+#    endif // __has_include_next(OTHER_KEYMAP_C)
+#endif // OTHER_KEYMAP_C
 
 
 """
@@ -193,28 +194,23 @@ def test_json2c_stdin():
  * This file was generated by qmk json2c. You may or may not want to
  * edit it directly.
  */
+
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     [0] = LAYOUT_ortho_1x1(KC_A)
 };
 
-#if defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
-const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {
-
-};
-#endif // defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
 
 
+#ifdef OTHER_KEYMAP_C
+#    if __has_include_next(OTHER_KEYMAP_C)
+#        include_next OTHER_KEYMAP_C
+#    endif // __has_include_next(OTHER_KEYMAP_C)
+#endif // OTHER_KEYMAP_C
 
 
 """
 
 
-def test_json2c_wrong_json():
-    result = check_subcommand('json2c', 'keyboards/handwired/pytest/info.json')
-    check_returncode(result, [1])
-    assert 'Invalid JSON keymap' in result.stdout
-
-
 def test_json2c_no_json():
     result = check_subcommand('json2c', 'keyboards/handwired/pytest/basic/keymaps/default/keymap.c')
     check_returncode(result, [1])

lib/python/qmk/tests/test_qmk_keymap.py

@@ -20,17 +20,18 @@ def test_generate_c_pytest_basic():
  * This file was generated by qmk json2c. You may or may not want to
  * edit it directly.
  */
+
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     [0] = LAYOUT(KC_A)
 };
 
-#if defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
-const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {
-
-};
-#endif // defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
 
 
+#ifdef OTHER_KEYMAP_C
+#    if __has_include_next(OTHER_KEYMAP_C)
+#        include_next OTHER_KEYMAP_C
+#    endif // __has_include_next(OTHER_KEYMAP_C)
+#endif // OTHER_KEYMAP_C
 """