Resolve keyboard_aliases when processing keyboard make targets

Makefile

@@ -113,6 +113,29 @@ endef
 # Make it easier to call TRY_TO_MATCH_RULE_FROM_LIST
 TRY_TO_MATCH_RULE_FROM_LIST = $(eval $(call TRY_TO_MATCH_RULE_FROM_LIST_HELPER,$1))$(RULE_FOUND)
 
+# As TRY_TO_MATCH_RULE_FROM_LIST_HELPER, but with additional
+# resolution of DEFAULT_FOLDER and keyboard_aliases.hjson for provided rule 
+define TRY_TO_MATCH_RULE_FROM_LIST_HELPER_KB
+    # Split on ":", padding with empty strings to avoid indexing issues
+    TOKEN1:=$$(shell python3 -c "import sys; print((sys.argv[1].split(':',1)+[''])[0])" $$(RULE))
+    TOKENr:=$$(shell python3 -c "import sys; print((sys.argv[1].split(':',1)+[''])[1])" $$(RULE))
+
+    TOKEN1:=$$(shell $(QMK_BIN) resolve-alias --allow-unknown $$(TOKEN1))
+
+    FOUNDx:=$$(shell echo $1 | tr " " "\n" | grep -Fx $$(TOKEN1))
+    ifneq ($$(FOUNDx),)
+        RULE := $$(TOKENr)
+        RULE_FOUND := true
+        MATCHED_ITEM := $$(TOKEN1)
+    else
+        RULE_FOUND := false
+        MATCHED_ITEM :=
+    endif
+endef
+
+# Make it easier to call TRY_TO_MATCH_RULE_FROM_LIST_KB
+TRY_TO_MATCH_RULE_FROM_LIST_KB = $(eval $(call TRY_TO_MATCH_RULE_FROM_LIST_HELPER_KB,$1))$(RULE_FOUND)
+
 define ALL_IN_LIST_LOOP
     OLD_RULE$1 := $$(RULE)
     $$(eval $$(call $1,$$(ITEM$1)))
@@ -138,7 +161,7 @@ define PARSE_RULE
         $$(eval $$(call PARSE_TEST))
     # If the rule starts with the name of a known keyboard, then continue
     # the parsing from PARSE_KEYBOARD
-    else ifeq ($$(call TRY_TO_MATCH_RULE_FROM_LIST,$$(shell $(QMK_BIN) list-keyboards --no-resolve-defaults)),true)
+    else ifeq ($$(call TRY_TO_MATCH_RULE_FROM_LIST_KB,$$(shell $(QMK_BIN) list-keyboards)),true)
         KEYBOARD_RULE=$$(MATCHED_ITEM)
         $$(eval $$(call PARSE_KEYBOARD,$$(MATCHED_ITEM)))
     else
@@ -170,17 +193,6 @@ define PARSE_KEYBOARD
     # include the correct makefile to determine the actual name of it
     CURRENT_KB := $1
 
-    # KEYBOARD_FOLDERS := $$(subst /, , $(CURRENT_KB))
-
-    DEFAULT_FOLDER := $$(CURRENT_KB)
-
-    # We assume that every rules.mk will contain the full default value
-    $$(eval include $(ROOT_DIR)/keyboards/$$(CURRENT_KB)/rules.mk)
-    ifneq ($$(DEFAULT_FOLDER),$$(CURRENT_KB))
-        $$(eval include $(ROOT_DIR)/keyboards/$$(DEFAULT_FOLDER)/rules.mk)
-    endif
-    CURRENT_KB := $$(DEFAULT_FOLDER)
-
     # 5/4/3/2/1
     KEYBOARD_FOLDER_PATH_1 := $$(CURRENT_KB)
     KEYBOARD_FOLDER_PATH_2 := $$(patsubst %/,%,$$(dir $$(KEYBOARD_FOLDER_PATH_1)))

lib/python/qmk/cli/__init__.py

@@ -82,6 +82,7 @@
     'qmk.cli.new.keymap',
     'qmk.cli.painter',
     'qmk.cli.pytest',
+    'qmk.cli.resolve_alias',
     'qmk.cli.test.c',
     'qmk.cli.userspace.add',
     'qmk.cli.userspace.compile',

lib/python/qmk/cli/resolve_alias.py

@@ -0,0 +1,16 @@
+from qmk.keyboard import keyboard_folder
+
+from milc import cli
+
+
+@cli.argument('--allow-unknown', arg_only=True, action='store_true', help="Return original if rule is not a valid keyboard.")
+@cli.argument('keyboard', arg_only=True, help='The keyboard\'s name')
+@cli.subcommand('Resolve DEFAULT_FOLDER and any keyboard_aliases for provided rule')
+def resolve_alias(cli):
+    try:
+        print(keyboard_folder(cli.args.keyboard))
+    except ValueError:
+        if cli.args.allow_unknown:
+            print(cli.args.keyboard)
+        else:
+            raise