Add Python3.10 to CI and handle distutils deprecation

Signed-off-by: Bernát Gábor <[email protected]>

azure-pipelines.yml

@@ -38,6 +38,10 @@ jobs:
             key: pre-commit | .pre-commit-config.yaml
             path: $(PRE_COMMIT_HOME)
       docs: null
+      py310:
+        image: [ linux ]
+      py39:
+        image: [ linux, windows, macOs ]
       py38:
         image: [linux, windows, macOs]
       py27:
@@ -56,7 +60,7 @@ jobs:
       package_description: null
     coverage:
       with_toxenv: 'coverage' # generate .tox/.coverage, .tox/coverage.xml after test run
-      for_envs: [py38, py37, py36, py35, py27, pypy3, pypy]
+      for_envs: [py310, py39, py38, py37, py36, py35, py27, pypy3, pypy]
     before:
       - task: UsePythonVersion@0
         condition: and(succeeded(), in(variables['TOXENV'], 'pypy'))

src/tox/helper/get_site_package_dir.py

@@ -3,6 +3,20 @@
 import json
 import sys
 import sysconfig
+import warnings
 
-data = json.dumps({"dir": sysconfig.get_path("purelib", vars={"base": sys.argv[1]})})
-print(data)
+dest_prefix = sys.argv[1]
+with warnings.catch_warnings():  # disable warning for PEP-632
+    warnings.simplefilter("ignore")
+    try:
+        import distutils.sysconfig
+
+        data = distutils.sysconfig.get_python_lib(prefix=dest_prefix)
+    except ImportError:  # if removed or not installed ignore
+        config_vars = {
+            k: dest_prefix if any(v == p for p in (sys.prefix, sys.base_prefix)) else v
+            for k, v in sysconfig.get_config_vars().items()
+        }
+        data = sysconfig.get_path("purelib", vars=config_vars)
+
+print(json.dumps({"dir": data}))

tox.ini

@@ -4,6 +4,8 @@ envlist = py27,
           py36,
           py37,
           py38,
+          py39,
+          py310,
           pypy,
           pypy3,
           coverage,
@@ -93,7 +95,7 @@ commands = coverage combine
            coverage xml -o {toxworkdir}/coverage.xml
            coverage html -d {toxworkdir}/htmlcov
            diff-cover --compare-branch {env:DIFF_AGAINST:origin/master} {toxworkdir}/coverage.xml
-depends = py27, py34, py35, py36, py37, py38, pypy, pypy3
+depends = py27, py35, py36, py37, py38, py39, py310, pypy, pypy3
 parallel_show_output = True
 
 [testenv:exit_code]