From 319aee73f2b519cf1e17a3e4c7a4aa854506cbe4 Mon Sep 17 00:00:00 2001
From: mayeut <mayeut@users.noreply.github.com>
Date: Sat, 9 Nov 2019 11:19:02 +0100
Subject: [PATCH 1/3] Force python 3.8 on Azure

---
 azure-pipelines.yml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 6d67dfbb..72ff2b85 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -3,6 +3,8 @@ jobs:
   pool: {vmImage: 'Ubuntu-18.04'}
   steps:
     - task: UsePythonVersion@0
+      inputs:
+        versionSpec: '3.8'
     - bash: |
         python -m pip install -r requirements-dev.txt
         python ./bin/run_tests.py
@@ -11,6 +13,8 @@ jobs:
   pool: {vmImage: 'macOS-10.13'}
   steps:
     - task: UsePythonVersion@0
+      inputs:
+        versionSpec: '3.8'
     - bash: |
         python -m pip install -r requirements-dev.txt
         python ./bin/run_tests.py
@@ -19,6 +23,8 @@ jobs:
   pool: {vmImage: 'vs2017-win2016'}
   steps:
     - task: UsePythonVersion@0
+      inputs:
+        versionSpec: '3.8'
     - script: choco install vcpython27 -f -y
       displayName: Install Visual C++ for Python 2.7
     - bash: |

From ce93a0309823642532068489dd603dea1d747e91 Mon Sep 17 00:00:00 2001
From: mayeut <mayeut@users.noreply.github.com>
Date: Sat, 9 Nov 2019 12:16:25 +0100
Subject: [PATCH 2/3] Fix tests on Windows Python 3.8

---
 unit_test/environment_test.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/unit_test/environment_test.py b/unit_test/environment_test.py
index 0f0f385e..1bc95374 100644
--- a/unit_test/environment_test.py
+++ b/unit_test/environment_test.py
@@ -1,3 +1,4 @@
+import os
 from cibuildwheel.environment import parse_environment
 
 
@@ -37,12 +38,15 @@ def test_inheritance():
 def test_shell_eval():
     environment_recipe = parse_environment('VAR="$(echo "a test" string)"')
 
+    env_copy = os.environ.copy()
+    env_copy.pop('VAR', None)
+
     environment_dict = environment_recipe.as_dictionary(
-        prev_environment={}
+        prev_environment=env_copy
     )
     environment_cmds = environment_recipe.as_shell_commands()
 
-    assert environment_dict == {'VAR': 'a test string'}
+    assert environment_dict['VAR'] == 'a test string'
     assert environment_cmds == ['export VAR="$(echo "a test" string)"']
 
 def test_shell_eval_and_env():

From 7dee79a96b26a4084fef995e1a0d79b4822b5cd5 Mon Sep 17 00:00:00 2001
From: mayeut <mayeut@users.noreply.github.com>
Date: Sat, 9 Nov 2019 12:38:38 +0100
Subject: [PATCH 3/3] Add python_requires metadata

---
 setup.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/setup.py b/setup.py
index 5f715538..9236eb9b 100644
--- a/setup.py
+++ b/setup.py
@@ -21,6 +21,8 @@ setup(
     package_data={
         'cibuildwheel': ['resources/*'],
     },
+    # Supported python versions
+    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*',
     keywords='ci wheel packaging pypi travis appveyor macos linux windows',
     classifiers=[
         'Intended Audience :: Developers',