Fix CI issue due to skipping missing interpreters (#13168)

Co-authored-by: KotlinIsland <kotlinisland@users.noreply.github.com>

.github/workflows/docs.yml

@@ -18,6 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     env:
       TOXENV: docs
+      TOX_SKIP_MISSING_INTERPRETERS: False
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2

.github/workflows/test.yml

@@ -93,6 +93,8 @@ jobs:
           toxenv: lint
 
     name: ${{ matrix.name }}
+    env:
+      TOX_SKIP_MISSING_INTERPRETERS: False
     steps:
     - uses: actions/checkout@v2
     - uses: actions/setup-python@v2

mypyc/codegen/emitclass.py

@@ -325,7 +325,7 @@ def emit_line() -> None:
         if not fields.get('tp_vectorcall'):
             # This is just a placeholder to please CPython. It will be
             # overriden during setup.
-            fields['tp_call'] = 'PyVectorcall_Call'        
+            fields['tp_call'] = 'PyVectorcall_Call'
     fields['tp_flags'] = ' | '.join(flags)
 
     emitter.emit_line(f"static PyTypeObject {emitter.type_struct_name(cl)}_template_ = {{")

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.8.0
-skip_missing_interpreters = true
+skip_missing_interpreters = {env:TOX_SKIP_MISSING_INTERPRETERS:True}
 envlist =
     py36,
     py37,
@@ -47,19 +47,16 @@ parallel_show_output = True
 
 [testenv:lint]
 description = check the code style
-basepython = python3.10
 commands = flake8 {posargs}
 
 [testenv:type]
 description = type check ourselves
-basepython = python3.10
 commands =
     python -m mypy --config-file mypy_self_check.ini -p mypy -p mypyc
     python -m mypy --config-file mypy_self_check.ini misc/proper_plugin.py
 
 [testenv:docs]
 description = invoke sphinx-build to build the HTML docs
-basepython = python3.10
 deps = -rdocs/requirements-docs.txt
 commands =
     sphinx-build -d "{toxworkdir}/docs_doctree" docs/source "{toxworkdir}/docs_out" --color -W -bhtml {posargs}