fix: support tox-gh and similar plugins

Signed-off-by: Henry Schreiner <[email protected]>

Author: henryiii

src/tox/config/main.py

@@ -123,6 +123,9 @@ def core(self) -> CoreConfigSet:
         self._core_set = core
         return core
 
+    def all_section_configs(self) -> Iterator[tuple[tuple[str, str, str], ConfigSet]]:
+        yield from self._key_to_conf_set.items()
+
     def get_section_config(
         self,
         section: Section,

src/tox/session/cmd/schema.py

@@ -99,6 +99,18 @@ def gen_schema(state: State) -> int:
 
     properties = _get_schema(core, path="#/properties")
 
+    sections = {
+        key: conf
+        for s, conf in state.conf.all_section_configs()
+        if (key := s[0].split(".")[0]) not in {"env_run_base", "env_pkg_base", "env"}
+    }
+    for key, conf in sections.items():
+        properties[key] = {
+            "type": "object",
+            "additionalProperties": not strict,
+            "properties": _get_schema(conf, path=f"#/properties/{key}/properties"),
+        }
+
     json_schema = {
         "$schema": "http://json-schema.org/draft-07/schema",
         "$id": "https://github.com/tox-dev/tox/blob/main/src/tox/util/tox.schema.json",