dev-python/bsddb3: Port to py3.9

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/bsddb3/bsddb3-6.2.7.ebuild

@@ -1,9 +1,9 @@
 # Copyright 1999-2020 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
-EAPI=6
+EAPI=7
 
-PYTHON_COMPAT=( python2_7 python3_{6,7,8} )
+PYTHON_COMPAT=( python2_7 python3_{6..9} )
 PYTHON_REQ_USE="threads(+)"
 DISTUTILS_USE_SETUPTOOLS=no
 
@@ -27,11 +27,14 @@ RDEPEND="
 		sys-libs/db:4.8
 		sys-libs/db:4.7
 	)"
-DEPEND="${RDEPEND}
-	dev-python/setuptools[${PYTHON_USEDEP}]"
+DEPEND="${RDEPEND}"
 
 DISTUTILS_IN_SOURCE_BUILD=1
 
+PATCHES=(
+	"${FILESDIR}"/${P}-py39.patch
+)
+
 python_prepare_all() {
 	# This list should be kept in sync with setup.py.
 	if [[ -z ${DB_VER} ]]; then

dev-python/bsddb3/files/bsddb3-6.2.7-py39.patch

@@ -0,0 +1,19 @@
+diff --git a/Lib3/bsddb/test/test_replication.py b/Lib3/bsddb/test/test_replication.py
+index 2fd6aa0..9d78241 100644
+--- a/Lib3/bsddb/test/test_replication.py
++++ b/Lib3/bsddb/test/test_replication.py
+@@ -105,8 +105,12 @@ class DBReplication(unittest.TestCase) :
+ 
+ class DBReplicationManager(DBReplication) :
+     def test01_basic_replication(self) :
+-        master_port = test_support.find_unused_port()
+-        client_port = test_support.find_unused_port()
++        try:
++            from test.support.socket_helper import find_unused_port
++        except ImportError:
++            find_unused_port = test_support.find_unused_port
++        master_port = find_unused_port()
++        client_port = find_unused_port()
+         if db.version() >= (5, 2) :
+             self.site = self.dbenvMaster.repmgr_site("127.0.0.1", master_port)
+             self.site.set_config(db.DB_GROUP_CREATOR, True)