Add `mass-compile` ability to filter by key existence. (#19885)

lib/python/qmk/cli/mass_compile.py

@@ -60,7 +60,7 @@ def _load_keymap_info(keyboard, keymap):
     action='append',
     default=[],
     help=  # noqa: `format-python` and `pytest` don't agree here.
-    "Filter the list of keyboards based on the supplied value in rules.mk. Matches info.json structure, and accepts the format 'features.rgblight=true'. May be passed multiple times, all filters need to match. Value may include wildcards such as '*' and '?'."  # noqa: `format-python` and `pytest` don't agree here.
+    "Filter the list of keyboards based on the supplied value in rules.mk. Matches info.json structure, and accepts the formats 'features.rgblight=true' or 'exists(matrix_pins.direct)'. May be passed multiple times, all filters need to match. Value may include wildcards such as '*' and '?'."  # noqa: `format-python` and `pytest` don't agree here.
 )
 @cli.argument('-km', '--keymap', type=str, default='default', help="The keymap name to build. Default is 'default'.")
 @cli.argument('-e', '--env', arg_only=True, action='append', default=[], help="Set a variable to be passed to make. May be passed multiple times.")
@@ -95,9 +95,10 @@ def mass_compile(cli):
             cli.log.info('Parsing data for all matching keyboard/keymap combinations...')
             valid_keymaps = [(e[0], e[1], dotty(e[2])) for e in pool.starmap(_load_keymap_info, target_list)]
 
-            filter_re = re.compile(r'^(?P<key>[a-zA-Z0-9_\.]+)\s*=\s*(?P<value>[^#]+)$')
+            equals_re = re.compile(r'^(?P<key>[a-zA-Z0-9_\.]+)\s*=\s*(?P<value>[^#]+)$')
+            exists_re = re.compile(r'^exists\((?P<key>[a-zA-Z0-9_\.]+)\)$')
             for filter_txt in cli.args.filter:
-                f = filter_re.match(filter_txt)
+                f = equals_re.match(filter_txt)
                 if f is not None:
                     key = f.group('key')
                     value = f.group('value')
@@ -116,6 +117,12 @@ def mass_compile(cli):
 
                     valid_keymaps = filter(_make_filter(key, value), valid_keymaps)
 
+                f = exists_re.match(filter_txt)
+                if f is not None:
+                    key = f.group('key')
+                    cli.log.info(f'Filtering on condition (exists: "{key}")...')
+                    valid_keymaps = filter(lambda e: e[2].get(key) is not None, valid_keymaps)
+
             targets = [(e[0], e[1]) for e in valid_keymaps]
 
     if len(targets) == 0: