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

PR-URL: nodejs#35521
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Shelley Vohr <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Jiawen Geng <[email protected]>
Reviewed-By: Myles Borins <[email protected]>

Author: cclauss

.github/workflows/build-windows.yml

@@ -3,7 +3,7 @@ name: build-windows
 on: [push, pull_request]
 
 env:
-  PYTHON_VERSION: 3.8
+  PYTHON_VERSION: 3.9
   FLAKY_TESTS: dontcare
 
 jobs:
@@ -12,7 +12,7 @@ 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

@@ -3,7 +3,7 @@ name: linters
 on: [push, pull_request]
 
 env:
-  PYTHON_VERSION: 3.8
+  PYTHON_VERSION: 3.9
   NODE_VERSION: 10.x
 
 jobs:
@@ -24,7 +24,7 @@ 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
@@ -62,7 +62,7 @@ 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

@@ -3,7 +3,7 @@ name: test-macOS
 on: [push, pull_request]
 
 env:
-  PYTHON_VERSION: 3.8
+  PYTHON_VERSION: 3.9
   FLAKY_TESTS: dontcare
 
 jobs:
@@ -12,7 +12,7 @@ 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

@@ -5,11 +5,12 @@
 # as is the fact that the ] goes on a new line.
 _=[ 'exec' '/bin/sh' '-c' '''
 test ${FORCE_PYTHON2} && exec python2 "$0" "$@"  # workaround for gclient
-which python3.8 >/dev/null && exec python3.8 "$0" "$@"
-which python3.7 >/dev/null && exec python3.7 "$0" "$@"
-which python3.6 >/dev/null && exec python3.6 "$0" "$@"
-which python3.5 >/dev/null && exec python3.5 "$0" "$@"
-which python2.7 >/dev/null && exec python2.7 "$0" "$@"
+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 "$0" "$@"
+command -v python3.5 >/dev/null && exec python3.5 "$0" "$@"
+command -v python2.7 >/dev/null && exec python2.7 "$0" "$@"
 exec python "$0" "$@"
 ''' "$0" "$@"
 ]
@@ -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: