fix[ux]: shorten interface name in error messages

tests/functional/syntax/test_interfaces.py

@@ -571,3 +571,43 @@ def bar():
         compiler.compile_code(code, input_bundle=input_bundle)
 
     assert e.value.message == "Contract does not implement all interface functions: bar(), foobar()"
+
+
+def test_interface_name_in_signature_is_short(make_input_bundle):
+    foo = """
+from ethereum.ercs import IERC20
+
+def foobar(token: IERC20):
+    ...
+        """
+    code = """
+from ethereum.ercs import IERC20
+import foo as Foo
+implements: Foo
+
+@internal
+def foobar(token: IERC20):
+    pass
+        """
+
+    input_bundle = make_input_bundle({"foo.vyi": foo})
+
+    with pytest.raises(InterfaceViolation) as e:
+        compiler.compile_code(code, input_bundle=input_bundle)
+
+    assert (
+        e.value.message
+        == "Contract does not implement all interface functions: foobar(interface IERC20)"
+    )
+
+
+def test_interface_name_in_output_is_short(make_input_bundle):
+    code = """
+from ethereum.ercs import IERC20
+@external
+def test(input: IERC20):
+    pass
+        """
+    out = compiler.compile_code(code, output_formats=["interface"])
+
+    assert "def test(input: IERC20):" in out["interface"]

vyper/semantics/types/module.py

@@ -1,4 +1,5 @@
 from functools import cached_property
+from pathlib import Path
 from typing import TYPE_CHECKING, Optional
 
 from vyper import ast as vy_ast
@@ -79,10 +80,10 @@ def abi_type(self) -> ABIType:
         return ABI_Address()
 
     def __str__(self):
-        return self._id
+        return Path(self._id).stem
 
     def __repr__(self):
-        return f"interface {self._id}"
+        return f"interface {Path(self._id).stem}"
 
     def _try_fold(self, node):
         if len(node.args) != 1: