fix #1018 - allow NonNormalizedVersion in semver

Author: RonnyPfannschmidt

changelog.d/20240305_102047_allow_non_normalized_semver.md

@@ -0,0 +1,4 @@
+
+### Fixed
+
+- fix #1018: allow non-normalized versions for semver

src/setuptools_scm/version.py

@@ -244,10 +244,13 @@ def guess_next_dev_version(version: ScmVersion) -> str:
 def guess_next_simple_semver(
     version: ScmVersion, retain: int, increment: bool = True
 ) -> str:
-    try:
-        parts = [int(i) for i in str(version.tag).split(".")[:retain]]
-    except ValueError:
-        raise ValueError(f"{version} can't be parsed as numeric version") from None
+    if isinstance(version.tag, _v.Version):
+        parts = list(version.tag.release[:retain])
+    else:
+        try:
+            parts = [int(i) for i in str(version.tag).split(".")[:retain]]
+        except ValueError:
+            raise ValueError(f"{version} can't be parsed as numeric version") from None
     while len(parts) < retain:
         parts.append(0)
     if increment:

testing/test_version.py

@@ -54,6 +54,11 @@
             "1.1.0.dev2",
             id="feature_in_branch",
         ),
+        pytest.param(
+            meta(NonNormalizedVersion("v1.0"), distance=2, branch="default", config=c),
+            "1.0.1.dev2",
+            id="non-normalized-allowed",
+        ),
     ],
 )
 def test_next_semver(version: ScmVersion, expected_next: str) -> None: