Add: Introduce an abstract base class for a VersioningScheme

docs/pontos/version/scheme.md

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+# pontos.version.scheme package
+
+```{eval-rst}
+.. automodule:: pontos.version.scheme
+   :members:
+```

pontos/version/scheme/__init__.py

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+# Copyright (C) 2023 Greenbone Networks GmbH
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from ._scheme import VersioningScheme
+from ._semantic import SemanticVersioningScheme
+
+__all__ = ("VersioningScheme",)

pontos/version/scheme/_scheme.py

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+# Copyright (C) 2023 Greenbone Networks GmbH
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from abc import ABC
+from typing import Type
+
+from ..calculator import VersionCalculator
+from ..version import Version
+
+
+class VersioningScheme(ABC):
+    """
+    An abstract base class for versioning schemes
+
+    Example:
+        Example on how to implement a new VersioningScheme
+
+        .. code-block:: python
+
+            from pontos.version.scheme import VersioningScheme
+
+            class MyVersioningScheme(VersioningScheme):
+                version_cls = MyVersion
+                version_calculator_cls = MyVersionCalculator
+    """
+
+    version_cls: Type[Version]
+    version_calculator_cls: Type[VersionCalculator]
+
+    @classmethod
+    def parse_version(cls, version: str) -> Version:
+        """
+        Parse a version from a version string
+
+        Raises:
+            :py:class:`pontos.version.error.VersionError`: If the version
+                string contains an invalid version
+
+        Returns:
+            A version instance
+        """
+        return cls.version_cls.from_string(version)
+
+    @classmethod
+    def from_version(cls, version: Version) -> Version:
+        return cls.version_cls.from_version(version)
+
+    @classmethod
+    def calculator(cls) -> Type[VersionCalculator]:
+        """
+        Return a matching version calculator for the implemented versioning
+        schema.
+
+        Returns:
+            A version calculator
+        """
+        return cls.version_calculator_cls