build: gitHub actions: Python 3.9 and actions/setup-python@v2

PR-URL: #35521
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Shelley Vohr <codebytere@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>

.github/workflows/auto-start-ci.yml

@@ -14,7 +14,7 @@ jobs:
     if: github.repository == 'nodejs/node'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v2
 
       # Install dependencies
       - name: Install jq

.github/workflows/build-tarball.yml

@@ -14,12 +14,12 @@ env:
 jobs:
   build-tarball:
     env:
-      PYTHON_VERSION: 3.8
+      PYTHON_VERSION: 3.9
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ env.PYTHON_VERSION }}
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v2
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: Environment Information
@@ -39,13 +39,13 @@ jobs:
           path: tarballs
   test-tarball-linux:
     env:
-      PYTHON_VERSION: 3.8
+      PYTHON_VERSION: 3.9
     needs: build-tarball
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ env.PYTHON_VERSION }}
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v2
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: Environment Information

.github/workflows/build-windows.yml

@@ -10,7 +10,7 @@ on:
       - v[0-9]+.x
 
 env:
-  PYTHON_VERSION: 3.8
+  PYTHON_VERSION: 3.9
   FLAKY_TESTS: dontcare
 
 jobs:
@@ -19,7 +19,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ env.PYTHON_VERSION }}
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v2
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: Install deps

.github/workflows/linters.yml

@@ -9,7 +9,7 @@ on:
       - v[0-9]+.x
 
 env:
-  PYTHON_VERSION: 3.8
+  PYTHON_VERSION: 3.9
   NODE_VERSION: 10.x
 
 jobs:
@@ -30,7 +30,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ env.PYTHON_VERSION }}
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v2
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: Environment Information
@@ -68,7 +68,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ env.PYTHON_VERSION }}
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v2
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: Environment Information

.github/workflows/test-asan.yml

@@ -14,7 +14,7 @@ on:
       - 'doc/**'
 
 env:
-  PYTHON_VERSION: 3.8
+  PYTHON_VERSION: 3.9
   FLAKY_TESTS: dontcare
 
 jobs:
@@ -28,7 +28,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ env.PYTHON_VERSION }}
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v2
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: Environment Information

.github/workflows/test-linux.yml

@@ -10,7 +10,7 @@ on:
       - v[0-9]+.x
 
 env:
-  PYTHON_VERSION: 3.8
+  PYTHON_VERSION: 3.9
   FLAKY_TESTS: dontcare
 
 jobs:
@@ -19,7 +19,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ env.PYTHON_VERSION }}
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v2
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: Environment Information

.github/workflows/test-macos.yml

@@ -10,7 +10,7 @@ on:
       - v[0-9]+.x
 
 env:
-  PYTHON_VERSION: 3.8
+  PYTHON_VERSION: 3.9
   FLAKY_TESTS: dontcare
 
 jobs:
@@ -19,7 +19,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ env.PYTHON_VERSION }}
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v2
         with:
           python-version: ${{ env.PYTHON_VERSION }}
       - name: Environment Information

configure

@@ -5,6 +5,7 @@
 # as is the fact that the ] goes on a new line.
 _=[ 'exec' '/bin/sh' '-c' '''
 test ${FORCE_PYTHON2} && exec python2 "$0" "$@"  # workaround for gclient
+command -v python3.9 >/dev/null && exec python3.9 "$0" "$@"
 command -v python3.8 >/dev/null && exec python3.8 "$0" "$@"
 command -v python3.7 >/dev/null && exec python3.7 "$0" "$@"
 command -v python3.6 >/dev/null && exec python3.6 "$0" "$@"
@@ -19,7 +20,7 @@ import sys
 from distutils.spawn import find_executable
 
 print('Node.js configure: Found Python {0}.{1}.{2}...'.format(*sys.version_info))
-acceptable_pythons = ((3, 8), (3, 7), (3, 6), (3, 5), (2, 7))
+acceptable_pythons = ((3, 9), (3, 8), (3, 7), (3, 6), (3, 5), (2, 7))
 if sys.version_info[:2] in acceptable_pythons:
   import configure
 else: