[PBCKP-289] fix distutils deprecation warnings

Warning was:
"DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead."

Author: kulaginm

testgres/node.py

@@ -339,7 +339,7 @@ def _create_recovery_conf(self, username, slot=None):
             "primary_conninfo='{}'\n"
         ).format(options_string(**conninfo))  # yapf: disable
         # Since 12 recovery.conf had disappeared
-        if self.version >= '12':
+        if self.version >= PgVer('12'):
             signal_name = os.path.join(self.data_dir, "standby.signal")
             # cross-python touch(). It is vulnerable to races, but who cares?
             with open(signal_name, 'a'):
@@ -371,7 +371,7 @@ def _create_recovery_conf(self, username, slot=None):
 
             line += "primary_slot_name={}\n".format(slot)
 
-        if self.version >= '12':
+        if self.version >= PgVer('12'):
             self.append_conf(line=line)
         else:
             self.append_conf(filename=RECOVERY_CONF_FILE, line=line)
@@ -517,9 +517,9 @@ def get_auth_method(t):
         # binary replication
         if allow_streaming:
             # select a proper wal_level for PostgreSQL
-            wal_level = 'replica' if self._pg_version >= '9.6' else 'hot_standby'
+            wal_level = 'replica' if self._pg_version >= PgVer('9.6') else 'hot_standby'
 
-            if self._pg_version < '13':
+            if self._pg_version < PgVer('13'):
                 self.append_conf(hot_standby=True,
                                  wal_keep_segments=WAL_KEEP_SEGMENTS,
                                  wal_level=wal_level)  # yapf: disable
@@ -530,7 +530,7 @@ def get_auth_method(t):
 
         # logical replication
         if allow_logical:
-            if self._pg_version < '10':
+            if self._pg_version < PgVer('10'):
                 raise InitNodeException("Logical replication is only "
                                         "available on PostgreSQL 10 and newer")
 
@@ -616,7 +616,7 @@ def get_control_data(self):
 
         # this one is tricky (blame PG 9.4)
         _params = [get_bin_path("pg_controldata")]
-        _params += ["-D"] if self._pg_version >= '9.5' else []
+        _params += ["-D"] if self._pg_version >= PgVer('9.5') else []
         _params += [self.data_dir]
 
         data = execute_utility(_params, self.utils_log_file)
@@ -758,7 +758,7 @@ def promote(self, dbname=None, username=None):
 
         # for versions below 10 `promote` is asynchronous so we need to wait
         # until it actually becomes writable
-        if self._pg_version < '10':
+        if self._pg_version < PgVer('10'):
             check_query = "SELECT pg_is_in_recovery()"
 
             self.poll_query_until(query=check_query,
@@ -1158,7 +1158,7 @@ def set_synchronous_standbys(self, standbys):
                 master.restart()
 
         """
-        if self._pg_version >= '9.6':
+        if self._pg_version >= PgVer('9.6'):
             if isinstance(standbys, Iterable):
                 standbys = First(1, standbys)
         else:
@@ -1179,7 +1179,7 @@ def catchup(self, dbname=None, username=None):
         if not self.master:
             raise TestgresException("Node doesn't have a master")
 
-        if self._pg_version >= '10':
+        if self._pg_version >= PgVer('10'):
             poll_lsn = "select pg_catalog.pg_current_wal_lsn()::text"
             wait_lsn = "select pg_catalog.pg_last_wal_replay_lsn() >= '{}'::pg_lsn"
         else:

testgres/utils.py

@@ -11,7 +11,7 @@
 import tempfile
 
 from contextlib import contextmanager
-from distutils.version import LooseVersion
+from packaging.version import Version
 from distutils.spawn import find_executable
 from six import iteritems
 
@@ -25,7 +25,7 @@
 bound_ports = set()
 
 # re-export version type
-PgVer = LooseVersion
+PgVer = Version
 
 
 def reserve_port():

tests/test_simple.py

@@ -896,16 +896,22 @@ def test_version_management(self):
         a = PgVer('10.0')
         b = PgVer('10')
         c = PgVer('9.6.5')
+        d = PgVer('15.0')
+        e = PgVer('15rc1')
+        f = PgVer('15beta4')
 
-        self.assertTrue(a > b)
+        self.assertTrue(a == b)
         self.assertTrue(b > c)
         self.assertTrue(a > c)
+        self.assertTrue(d > e)
+        self.assertTrue(e > f)
+        self.assertTrue(d > f)
 
         version = get_pg_version()
         with get_new_node() as node:
             self.assertTrue(isinstance(version, six.string_types))
             self.assertTrue(isinstance(node.version, PgVer))
-            self.assertEqual(node.version, str(version))
+            self.assertEqual(node.version, PgVer(version))
 
     def test_child_pids(self):
         master_processes = [