add files

rplugin/python3/mrpy/yaml.py

@@ -0,0 +1,40 @@
+from io import StringIO
+from ruamel.yaml import YAML
+
+from .types import JSONData, JSONDataScalar
+
+yaml = YAML(typ="safe")
+
+
+def dump_scalar(entry: JSONDataScalar) -> str:
+    match entry:
+        case None:
+            return "null\n"
+        case True:
+            return "true\n"
+        case False:
+            return "false\n"
+        case _:
+            return f"{entry:s}\n"
+
+
+def dump(obj: dict[str, JSONDataScalar | list[JSONDataScalar]]) -> str:
+    ret = ""
+    for key, value in obj.items():
+        ret += key
+        ret += ":"
+
+        match value:
+            case list() as entries:
+                ret += "\n"
+                for entry in entries:
+                    ret += f"  - {dump_scalar(entry)}"
+            case entry:
+                ret += f" {dump_scalar(entry)}"
+
+    return ret
+
+
+def load(content: str) -> JSONData:
+    with StringIO(content) as sio:
+        return yaml.load(sio)  # pyright: ignore[reportAny, reportUnknownMemberType]