Fix version sanitization of epoch

Author: dolfinus

CHANGELOG.rst

@@ -14,6 +14,11 @@ Changelog
         Fix calling ``get_version(root=...)`` in combination with version-file strategy -
         relative file version was resolved against ``os.cwd``, not explicitly passed ``root``.
 
+    .. change::
+        :tags: bugfix
+
+        Fix epoch versions like ``0!2025.12.3`` were wrongly converted to ``0.2025.12.3``.
+
 .. changelog::
     :version: 2.1.0
     :released: 10.01.2025

setuptools_git_versioning.py

@@ -36,7 +36,7 @@
 TIMESTAMP_REGEXP = re.compile(r"\{timestamp:?(?P<fmt>[^:}]+)?\}", re.IGNORECASE | re.UNICODE)
 
 # https://github.com/pypa/setuptools/blob/bc39d28bda2a1faee6680ae30e42526b9d775151/setuptools/command/dist_info.py#L108-L131
-UNSUPPORTED_SYMBOL_REGEXP = re.compile(r"[^\w\d]+", re.IGNORECASE | re.UNICODE)
+UNSUPPORTED_SYMBOL_REGEXP = re.compile(r"[^\w\d!]+", re.IGNORECASE | re.UNICODE)
 
 LOG_FORMAT = "[%(asctime)s] %(levelname)+8s: %(message)s"
 # setuptools v60.2.0 changed default logging level to DEBUG: https://github.com/pypa/setuptools/pull/2974

tests/test_integration/test_tag.py

@@ -108,6 +108,7 @@ def test_tag_missing(repo, create_config, starting_version, version):
     [
         ("1.0.0", "1.0.0"),
         ("v1.2.3", "1.2.3"),
+        ("1!2.3", "1!2.3"),
         ("1.2.3dev1", "1.2.3.dev1"),
         ("1.2.3.dev1", "1.2.3.dev1"),
         ("1.2.3-dev1", "1.2.3.dev1"),

tests/test_integration/test_version_callback.py

@@ -152,6 +152,7 @@ def test_version_callback_missing(repo, create_version_py, create_config):
     [
         ("1.0.0", "1.0.0"),
         ("v1.2.3", "1.2.3"),
+        ("1!2.3", "1!2.3"),
         ("1.2.3dev1", "1.2.3.dev1"),
         ("1.2.3.dev1", "1.2.3.dev1"),
         ("1.2.3-dev1", "1.2.3.dev1"),

tests/test_integration/test_version_file.py

@@ -124,6 +124,7 @@ def test_version_file_dirty(repo, create_config, add, template, subst):
     [
         ("1.0.0", "1.0.0"),
         ("v1.2.3", "1.2.3"),
+        ("1!2.3", "1!2.3"),
         ("1.2.3dev1", "1.2.3.dev1"),
         ("1.2.3.dev1", "1.2.3.dev1"),
         ("1.2.3-dev1", "1.2.3.dev1"),