Declare path-like support in types

python/gtirb/ir.py

@@ -10,6 +10,7 @@
 """
 
 import itertools
+import os
 import typing
 from uuid import UUID
 
@@ -171,7 +172,9 @@ def load_protobuf_file(protobuf_file: typing.BinaryIO) -> "IR":
         return IR._from_protobuf(ir, None)
 
     @staticmethod
-    def load_protobuf(file_name: str) -> "IR":
+    def load_protobuf(
+        file_name: typing.Union[str, "os.PathLike[str]"]
+    ) -> "IR":
         """Load IR from a Protobuf file at the specified path.
 
         :param file_name: The path to the Protobuf file.
@@ -193,7 +196,9 @@ def save_protobuf_file(self, protobuf_file: typing.BinaryIO) -> None:
         protobuf_file.write(PROTOBUF_VERSION.to_bytes(1, byteorder="little"))
         protobuf_file.write(self._to_protobuf().SerializeToString())
 
-    def save_protobuf(self, file_name: str) -> None:
+    def save_protobuf(
+        self, file_name: typing.Union[str, "os.PathLike[str]"]
+    ) -> None:
         """Save ``self`` to a Protobuf file at the specified path.
 
         :param file_name: The file path at which to

python/tests/test_ir.py

@@ -1,5 +1,6 @@
 import io
 import os
+import pathlib
 import tempfile
 import unittest
 
@@ -77,6 +78,19 @@ def test_ir_protobuf_load(self):
             new_ir.modules[0].aux_data["key"].data,
         )
 
+    def test_load_pathlib(self):
+        """
+        Ensure `load_protobuf` and `save_protobuf` support path-like objects
+        """
+        ir_path = pathlib.Path(IR_FILE)
+        new_ir = gtirb.IR.load_protobuf(ir_path)
+        self.assertTrue(self.ir.deep_eq(new_ir))
+        self.assertNotEqual(
+            self.ir.modules[0].aux_data["key"].data,
+            new_ir.modules[0].aux_data["key"].data,
+        )
+        new_ir.save_protobuf(ir_path)
+
 
 class NotGTIRBTest(unittest.TestCase):
     def test(self):