Add support for Python 3.8 (#1437)

make-linux-release.sh

 #!/bin/bash
-PYTHON_VERSIONS="cp27-cp27m cp34-cp34m cp35-cp35m cp36-cp36m cp37-cp37m"
+PYTHON_VERSIONS="cp27-cp27m cp34-cp34m cp35-cp35m cp36-cp36m cp37-cp37m cp38-cp38m"
 
 cd /io
 /opt/python/cp37-cp37m/bin/pip install poetry -U
@@ -10,5 +10,6 @@ cd /io
     -P "3.4:/opt/python/cp34-cp34m/bin/python" \
     -P "3.5:/opt/python/cp35-cp35m/bin/python" \
     -P "3.6:/opt/python/cp36-cp36m/bin/python" \
-    -P "3.7:/opt/python/cp37-cp37m/bin/python"
+    -P "3.7:/opt/python/cp37-cp37m/bin/python" \
+    -P "3.8:/opt/python/cp38-cp38m/bin/python"
 cd -

sonnet

@@ -28,6 +28,7 @@ class MakeReleaseCommand(Command):
         "3.5": "python3.5",
         "3.6": "python3.6",
         "3.7": "python3.7",
+        "3.8": "python3.8",
     }
 
     def handle(self):
@@ -46,7 +47,7 @@ class MakeReleaseCommand(Command):
         self.check_system(pythons)
 
         from poetry import __version__
-        from poetry.poetry import Poetry
+        from poetry.factory import Factory
         from poetry.puzzle import Solver
         from poetry.repositories.pool import Pool
         from poetry.repositories.repository import Repository
@@ -59,7 +60,7 @@ class MakeReleaseCommand(Command):
         from poetry.utils.helpers import temporary_directory
         from poetry.vcs import get_vcs
 
-        project = Poetry.create(Path.cwd())
+        project = Factory().create_poetry(Path.cwd())
         package = project.package
         del package.dev_requires[:]
 

tests/masonry/builders/test_complete.py

@@ -79,7 +79,7 @@ def test_wheel_c_extension():
 Wheel-Version: 1.0
 Generator: poetry {}
 Root-Is-Purelib: false
-Tag: cp[23]\\d-cp[23]\\dmu?-.+
+Tag: cp[23]\\d-cp[23]\\dm?u?-.+
 $""".format(
                     __version__
                 ),
@@ -136,7 +136,7 @@ def test_wheel_c_extension_src_layout():
 Wheel-Version: 1.0
 Generator: poetry {}
 Root-Is-Purelib: false
-Tag: cp[23]\\d-cp[23]\\dmu?-.+
+Tag: cp[23]\\d-cp[23]\\dm?u?-.+
 $""".format(
                     __version__
                 ),

tox.ini

 [tox]
 skipsdist = True
-envlist = py27, py34, py35, py36, py37
+envlist = py27, py34, py35, py36, py37, py38
 
 [testenv]
 whitelist_externals = poetry