Adding upstream version 4.6.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

commitizen/providers/scm_provider.py

@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+from commitizen.git import get_tags
+from commitizen.providers.base_provider import VersionProvider
+from commitizen.tags import TagRules
+
+
+class ScmProvider(VersionProvider):
+    """
+    A provider fetching the current/last version from the repository history
+
+    The version is fetched using `git describe` and is never set.
+
+    It is meant for `setuptools-scm` or any package manager `*-scm` provider.
+    """
+
+    def get_version(self) -> str:
+        rules = TagRules.from_settings(self.config.settings)
+        tags = get_tags(reachable_only=True)
+        version_tags = rules.get_version_tags(tags)
+        versions = sorted(rules.extract_version(t) for t in version_tags)
+        if not versions:
+            return "0.0.0"
+        return str(versions[-1])
+
+    def set_version(self, version: str):
+        # Not necessary
+        pass