Fix broken build (#1301)

* Pin `tox==3.25.1`

* Ignore B027

* Use `ubuntu-20.04` not latest due to https://github.com/actions/setup-python/issues/544\#issuecomment-1320295576

* More `-20.04`

* 3.6.15

* ubuntu-20.04

* Remove hardcoded `-latest`

Author: abhinavsingh

.flake8

@@ -31,6 +31,8 @@ extend-ignore =
   I  # flake8-isort is drunk + we have isort integrated into pre-commit
   B009    # FIXME: `getattr()` called with a constant arg
   B024    # FIXME: is an abstract base class, but it has no abstract methods
+  B027    # Is an empty method in an abstract base class, but has no abstract decorator.
+          # Consider adding @abstractmethod.
   C812    # FIXME: missing trailing comma
   C819    # FIXME: inline trailing comma
   D101

.github/workflows/test-library.yml

@@ -46,7 +46,7 @@ concurrency:
 jobs:
   pre-setup:
     name: ⚙️ Pre-set global build settings
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     defaults:
       run:
         shell: python
@@ -216,7 +216,7 @@ jobs:
     needs:
     - pre-setup  # transitive, for accessing settings
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     env:
       PY_COLORS: 1
@@ -263,7 +263,7 @@ jobs:
         python -m
         pip install
         --user
-        tox
+        tox==3.25.1
 
     - name: Grab the source from Git
       uses: actions/checkout@v3
@@ -331,7 +331,7 @@ jobs:
     - build
     - pre-setup  # transitive, for accessing settings
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         toxenv:
@@ -388,7 +388,7 @@ jobs:
         python -m
         pip install
         --user
-        tox
+        tox==3.25.1
 
     - name: Grab the source from Git
       uses: actions/checkout@v3
@@ -433,15 +433,15 @@ jobs:
     - build
     - pre-setup  # transitive, for accessing settings
 
-    runs-on: ${{ matrix.os }}-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       # max-parallel: 4
       matrix:
         os:
-        - macOS
-        - Ubuntu
-        - Windows
+        - macOS-latest
+        - Ubuntu-20.04
+        - Windows-latest
         python:
         # NOTE: The latest and the lowest supported Pythons are prioritized
         # NOTE: to improve the responsiveness. It's nice to see the most
@@ -505,7 +505,7 @@ jobs:
         python -m
         pip install
         --user
-        tox
+        tox==3.25.1
 
     - name: Grab the source from Git
       uses: actions/checkout@v3
@@ -543,7 +543,7 @@ jobs:
         verbose: true
 
   test-container:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     permissions:
       packages: write
     if: success()
@@ -603,7 +603,7 @@ jobs:
         ./tests/integration/test_integration.sh 8899
 
   analyze:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     name: 🛡️ Analyze
     # schedule:
     # - cron: '0 14 * * 1'
@@ -659,11 +659,11 @@ jobs:
       uses: github/codeql-action/analyze@v2
 
   # brew:
-  #   runs-on: ${{ matrix.os }}-latest
+  #   runs-on: ${{ matrix.os }}
   #   name: 🍺 🐍${{ matrix.python }} @ ${{ matrix.os }}
   #   strategy:
   #     matrix:
-  #       os: [macOS]
+  #       os: [macOS-latest]
   #       python: ['3.10']
   #     # max-parallel: 1
   #     fail-fast: false
@@ -681,11 +681,11 @@ jobs:
   #       proxy -h
 
   dashboard:
-    runs-on: ${{ matrix.os }}-latest
+    runs-on: ${{ matrix.os }}
     name: 📊 Node ${{ matrix.node }} @ ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu, windows, macOS]
+        os: [ubuntu-20.04, windows-latest, macOS-latest]
         node: ['10.x', '11.x', '12.x']
       # max-parallel: 4
       fail-fast: false
@@ -712,11 +712,11 @@ jobs:
         cd ..
 
   developer:
-    runs-on: ${{ matrix.os }}-latest
+    runs-on: ${{ matrix.os }}
     name: 🧑‍💻 👩‍💻 👨‍💻 Developer setup ${{ matrix.node }} @ ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu, macOS]
+        os: [ubuntu-20.04, macOS-latest]
         python: ['3.10']
       fail-fast: false
     steps:
@@ -740,7 +740,7 @@ jobs:
         python3 -m proxy --version
 
   ghcr-latest:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     permissions:
       packages: write
     if: success()
@@ -822,7 +822,7 @@ jobs:
         -t $LATEST_TAG .
 
   ghcr-openssl:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     permissions:
       packages: write
     if: success()
@@ -902,7 +902,7 @@ jobs:
         -t $LATEST_TAG .
 
   docker-latest:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     permissions:
       packages: write
     if: success()
@@ -975,7 +975,7 @@ jobs:
     - ghcr-openssl
     - docker-latest
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - name: Decide whether the needed jobs succeeded or failed
@@ -990,7 +990,7 @@ jobs:
     - pre-setup  # transitive, for accessing settings
     if: >-
       fromJSON(needs.pre-setup.outputs.release-requested)
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     environment:
       name: release
@@ -1019,7 +1019,7 @@ jobs:
     if: >-
       fromJSON(needs.pre-setup.outputs.is-untagged-devel)
       || fromJSON(needs.pre-setup.outputs.release-requested)
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     environment:
       name: release-testpypi
@@ -1048,7 +1048,7 @@ jobs:
     needs:
     - publish-pypi
     - pre-setup  # transitive, for accessing settings
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - name: Fetch the src snapshot
@@ -1081,7 +1081,7 @@ jobs:
     needs:
     - post-release-repo-update
     - pre-setup  # transitive, for accessing settings
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     permissions:
       contents: write