Reject npm specifier for >=0.4.0

tests/test_versioning.py

@@ -52,3 +52,12 @@ def test_version_does_not_exist():
     with pytest.raises(UnexpectedVersionError) as excinfo:
         detect_vyper_version_from_source("# pragma version 2024.0.1")
     assert str(excinfo.value) == "No installable Vyper satisfies the specifier ==2024.0.1"
+
+
+def test_npm_version_for_04_release():
+    with pytest.raises(UnexpectedVersionError) as excinfo:
+        detect_vyper_version_from_source("# pragma version ^0.4.0")
+    assert (
+        str(excinfo.value)
+        == "Please use the pypi-style version specifier for vyper versions >= 0.4.0"
+    )

vvm/utils/versioning.py

@@ -31,6 +31,10 @@ def _detect_version_specifier(source_code: str) -> Specifier:
 
     specifier, version_str = match.groups()
     if specifier in ("~", "^"):  # convert from npm-style to pypi-style
+        if Version(version_str) >= Version("0.4.0"):
+            error = "Please use the pypi-style version specifier for vyper versions >= 0.4.0"
+            raise UnexpectedVersionError(error)
+
         if specifier == "^" and not version_str.startswith("0."):
             # Minor match, remove the patch from the version
             # Note: not for 0.x versions, they should only match minor versions