PEP 632 / PEP 440: Use vendored _pep440.Version, with little patch to it

A little patch to re-add the `version()` method was needed for version
comparison backwards-compatibility with code using it.

Also, don't do code coverage reporting on the vendored code.

Author: amotl

.coveragerc

@@ -4,8 +4,9 @@ omit =
     */.buildout/eggs/*
     bin/test
     buildout-cache/eggs/*
-    parts/*
     eggs/*
+    parts/*
+    src/crate/client/_pep440.py
 exclude_lines =
     # pragma: no cover
     raise NotImplemented

src/crate/client/_pep440.py

@@ -395,6 +395,13 @@ def is_prerelease(self):
     def is_postrelease(self):
         return bool(self._version.post)
 
+    @property
+    def version(self) -> tuple:
+        """
+        PATCH: Return version tuple for backward-compatibility.
+        """
+        return self._version.release
+
 
 def _parse_letter_version(letter, number):
     if letter:

src/crate/client/connection.py

@@ -23,7 +23,7 @@
 from .exceptions import ProgrammingError, ConnectionError
 from .http import Client
 from .blob import BlobContainer
-from distutils.version import StrictVersion
+from ._pep440 import Version
 
 
 class Connection(object):
@@ -192,12 +192,12 @@ def _lowest_server_version(self):
         for server in self.client.active_servers:
             try:
                 _, _, version = self.client.server_infos(server)
-                version = StrictVersion(version)
+                version = Version(version)
             except (ValueError, ConnectionError):
                 continue
             if not lowest or version < lowest:
                 lowest = version
-        return lowest or StrictVersion('0.0.0')
+        return lowest or Version('0.0.0')
 
     def __repr__(self):
         return '<Connection {0}>'.format(repr(self.client))

src/crate/client/sqlalchemy/sa_version.py

@@ -20,9 +20,9 @@
 # software solely pursuant to the terms of the relevant commercial agreement.
 
 import sqlalchemy as sa
-from distutils.version import StrictVersion as V
+from crate.client._pep440 import Version
 
-SA_VERSION = V(sa.__version__)
+SA_VERSION = Version(sa.__version__)
 
-SA_1_4 = V('1.4.0b1')
-SA_2_0 = V('2.0.0')
+SA_1_4 = Version('1.4.0b1')
+SA_2_0 = Version('2.0.0')

src/crate/testing/test_layer.py

@@ -22,7 +22,7 @@
 import os
 import tempfile
 import urllib
-from distutils.version import LooseVersion
+from crate.client._pep440 import Version
 from unittest import TestCase, mock
 from io import BytesIO
 
@@ -75,7 +75,7 @@ def test_layer_from_uri(self):
             versions = json.loads(response.read().decode())
             version = versions["crate_testing"]
 
-        self.assertGreaterEqual(LooseVersion(version), LooseVersion("4.5.0"))
+        self.assertGreaterEqual(Version(version), Version("4.5.0"))
 
         uri = "https://cdn.crate.io/downloads/releases/crate-{}.tar.gz".format(version)
         layer = CrateLayer.from_uri(uri, name="crate-by-uri", http_port=42203)