fix #906: ensure tag regex from setup.py is converted to regex

CHANGELOG.rst

@@ -6,6 +6,7 @@ bugfix
 ------
 
 * update version file template to work on older python versions by using type comments
+* ensure tag regex from setup.py is parsed into regex
 
 v8.0.0
 ======

src/setuptools_scm/_integration/setuptools.py

@@ -91,9 +91,13 @@ def version_keyword(
         dist_name = read_dist_name_from_setup_cfg()
     version_cls = value.pop("version_cls", None)
     normalize = value.pop("normalize", True)
+    tag_regex = _config._check_tag_regex(
+        value.pop("tag_regex", _config.DEFAULT_TAG_REGEX)
+    )
     final_version = _validate_version_cls(version_cls, normalize)
+
     config = _config.Configuration(
-        dist_name=dist_name, version_cls=final_version, **value
+        dist_name=dist_name, version_cls=final_version, tag_regex=tag_regex, **value
     )
     _assign_version(dist, config)
 

testing/test_integration.py

@@ -169,3 +169,17 @@ def test_unicode_in_setup_cfg(tmp_path: Path) -> None:
     )
     name = setuptools_scm._integration.setuptools.read_dist_name_from_setup_cfg(cfg)
     assert name == "configparser"
+
+
+def test_setuptools_version_keyword_ensures_regex(
+    wd: WorkDir,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    wd.commit_testfile("test")
+    wd("git tag 1.0")
+    monkeypatch.chdir(wd.cwd)
+    from setuptools_scm._integration.setuptools import version_keyword
+    import setuptools
+
+    dist = setuptools.Distribution({"name": "test"})
+    version_keyword(dist, "use_scm_version", {"tag_regex": "(1.0)"})