separate workflow for testing stubs (#1701)

* separate workflow for testing stubs

* remove 3.5 and 3.6

.github/workflows/test-stubs.yml

@@ -0,0 +1,44 @@
+name: Test Stubs
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+    branches:
+    - master
+  workflow_call:
+
+permissions: read-all
+
+jobs:
+  Python:
+    name: core / Python ${{ matrix.ver }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-20.04, macos-latest]
+        ver: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
+
+    steps:
+    - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2.7.0
+
+    - name: Set up Python
+      uses: actions/setup-python@75f3110429a8c05be0e1bf360334e4cced2b63fa # v2.3.3
+      with:
+        python-version: ${{ matrix.ver }}
+
+    - name: Install metaflow
+      run: pip install .
+
+    - name: Install metaflow-stubs
+      run: metaflow develop stubs install --force
+
+    - name: Run mypy tests
+      uses: nick-fields/retry@v2
+      with:
+        max_attempts: 2
+        retry_on: error
+        command: cd ./stubs && pytest --mypy-ini-file test/setup.cfg --mypy-only-local-stub && cd -
+        on_retry_command: |
+          [[ $(pwd) == *stubs ]] && cd ..

.github/workflows/test.yml

@@ -43,17 +43,6 @@ jobs:
     - name: Execute Python tests
       run: tox
 
-    - name: Install metaflow
-      run: pip install .
-
-    - name: Install metaflow-stubs
-      if: contains(fromJson('["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]'), matrix.ver)
-      run: metaflow develop stubs install --force
-
-    - name: Run mypy tests for Python 3.7 to 3.12
-      if: contains(fromJson('["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]'), matrix.ver)
-      run: cd ./stubs && pytest --mypy-ini-file test/setup.cfg --mypy-only-local-stub && cd -
-
   R:
     name: core / R ${{ matrix.ver }} on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}