Add python version file support

.github/workflows/test.yml

@@ -100,3 +100,38 @@ jobs:
 
           pip install requests
           pip3 install s4cmd
+
+  test_python_version_file:
+    runs-on: ubuntu-latest
+    container: amazonlinux:2023
+    steps:
+      - name: Setup runner
+        run: |
+          yum install -y git tar gzip sudo
+
+      - uses: actions/checkout@v3
+
+      - name: Create python version file
+        run: |
+          echo '3.11.5' > .python-version
+
+      - name: Install python
+        uses: ./
+        with:
+          python-version-file: ".python-version"
+
+      - name: Test installation
+        run: |
+          set -x
+
+          which python3
+          which python
+
+          python3 --version
+          python --version
+
+          python3 --version 2>&1 | grep -F "3.11.5"
+          test "$(python3 -m pip --version)" = "$(pip3 --version)"
+
+          python --version 2>&1 | grep -F "3.11.5"
+          test "$(python3 -m pip --version)" = "$(pip --version)"

action.yml

@@ -2,8 +2,10 @@ name: 'Setup python amazon linux'
 description: 'setup-python action for amazon linux self hosted runners'
 inputs:
   python-version:
+    description: 'Version of python to be installed. Reads from .python-version if unset.'
+  python-version-file:
     description: 'Version of python to be installed'
-    required: true
+    default: '.python-version'
   cache:
     description: Used to specify whether caching is needed. Set to true, if you'd like to enable caching.
     required: true
@@ -20,7 +22,7 @@ runs:
       id: find-exact-python-version
       shell: bash
       run: |
-        exact_python_version=$(${GITHUB_ACTION_PATH}/find-exact-python-version.sh "${{ inputs.python-version }}")
+        exact_python_version=$(${GITHUB_ACTION_PATH}/find-exact-python-version.sh "${{ inputs.python-version }}" "${{ inputs.python-version-file }}")
         echo "exact_python_version=${exact_python_version}" >> $GITHUB_OUTPUT
 
     - name: Set installation directory

find-exact-python-version.sh

@@ -3,11 +3,17 @@
 set -euo pipefail
 
 specified_version="$1"
+specified_version_file="$2"
+
+desired_python_version="${specified_version}"
+if [ -f "${specified_version_file}" ]; then
+  desired_python_version=$(cat "${specified_version_file}")
+fi
 
 # This versions map should be kept in sync with
 # - https://www.python.org/downloads/
 # - https://devguide.python.org/versions/
-case "${specified_version}" in
+case "${desired_python_version}" in
     "3")
         echo "3.12.0"
         ;;
@@ -27,6 +33,6 @@ case "${specified_version}" in
         echo "3.8.18"
         ;;
     *)
-        echo "${specified_version}"
+        echo "${desired_python_version}"
         ;;
 esac

install-system-dependencies.sh

@@ -5,12 +5,13 @@ set -euo pipefail
 # Reference https://stackoverflow.com/a/73208851/3316017
 
 sudo yum update -y
-sudo yum groupinstall -y "Development Tools"
-if yum info "openssl11-devel" &> /dev/null; then
-  sudo yum install -y openssl11-devel
-else
-  sudo yum install -y openssl-devel
+
+desired_openssl_package="openssl-devel"
+if yum info "openssl11-devel" &>/dev/null; then
+  desired_openssl_package="openssl11-devel"
 fi
-sudo yum install -y zlib-devel bzip2 bzip2-devel readline-devel libffi-devel \
-                    ncurses-devel sqlite sqlite-devel gdbm-devel tk-devel xz-devel \
-                    tar gzip wget
+
+sudo yum groupinstall -y "Development Tools"
+sudo yum install -y "${desired_openssl_package}" zlib-devel bzip2 bzip2-devel readline-devel libffi-devel \
+  ncurses-devel sqlite sqlite-devel gdbm-devel tk-devel xz-devel \
+  tar gzip wget