name: "Cache APT Packages"
description: "Install APT based packages and cache them for future runs."
author: awalsh128
branding:
  icon: "hard-drive"
  color: "green"

inputs:
  packages:
    description: "Space delimited list of packages to install. Version can be specified optionally using APT command syntax of <name>=<version> (e.g. xdot=1.2-2)."
    required: true
    default: ""
  version:
    description: "Version of cache to load. Each version will have its own cache. Note, all characters except spaces are allowed."
    required: false
    default: ""
  execute_install_scripts:
    description: "Execute Debian package pre and post install script upon restore. See README.md caveats for more information."
    required: false
    default: "false"
  refresh:
    description: "OBSOLETE: Refresh is not used by the action, use version instead."
    deprecationMessage: "Refresh is not used by the action, use version instead."
  debug:
    description: "Enable debugging when there are issues with action. Minor performance penalty."
    required: false
    default: "false"

outputs:
  cache-hit:
    description: "A boolean value to indicate a cache was found for the packages requested."
    # This compound expression is needed because lhs can be empty.
    # Need to output true and false instead of true and nothing.
    value: ${{ steps.load-cache.outputs.cache-hit || false }}
  package-version-list:
    description: "The main requested packages and versions that are installed. Represented as a comma delimited list with equals delimit on the package version (i.e. <package>:<version,<package>:<version>)."
    value: ${{ steps.post-cache.outputs.package-version-list }}
  all-package-version-list:
    description: "All the pulled in packages and versions, including dependencies, that are installed. Represented as a comma delimited list with equals delimit on the package version (i.e. <package>:<version,<package>:<version>)."
    value: ${{ steps.post-cache.outputs.all-package-version-list }}

runs:
  using: "composite"
  env:
    CACHE_DIR: ~/cache-apt-pkgs
    GLOBAL_VERSION: 20250824
  steps:
    - id: install-aptfast
      shell: bash
      run: |
        if ! apt-fast --version > /dev/null 2>&1; then
          "Installing apt-fast for optimized installs and updates"
          /bin/bash -c "$(curl -sL https://raw.githubusercontent.com/ilikenwf/apt-fast/master/quick-install.sh)"
        fi
    - id: setup-binary
      shell: bash
      run: |
        BINARY_PATH="${{ github.action_path }}/tools/distribute.sh getbinpath ${{ runner.arch }}"
        if [ ! -f "$BINARY_PATH" ]; then
          echo "Error: Binary not found at $BINARY_PATH"
          echo "Please ensure the action has been properly built and binaries are included in the dist directory"
          exit 1
        fi

    - id: create-cache-key
      shell: bash      
      run: |
        ${BINARY_PATH} createkey \
          -os-arch ${{ runner.arch }} \
          -plaintext-path "${CACHE_DIR}/cache_key.txt" \
          -ciphertext-path "${CACHE_DIR}/cache_key.md5" \
          -version "${{ inputs.version }}" \
          -global-version "${GLOBAL_VERSION}" \          
          ${{ inputs.packages }}
        echo "cache-key=$(cat $CACHE_DIR/cache_key.md5)" >> $GITHUB_OUTPUT

    - id: load-cache
      uses: actions/cache/restore@v4
      with:
        path: ${CACHE_DIR}
        key: cache-apt-pkgs_${{ steps.create-cache-key.outputs.cache-key }}

    - id: post-load-cache
      # TODO get this implemented
      # -exec-install-scripts ${{ inputs.execute_install_scripts }} \
      run: |
        if [ "$CACHE_HIT" == "true" ]; then
          ${BINARY_PATH} restore \
            -cache-dir "${CACHE_DIR}" \
            -restore-root "/" \
            "$PACKAGES"
        else
          ${BINARY_PATH} install \
            -cache-dir "${CACHE_DIR}"
            -version "${{ inputs.version }}" \
            -global-version "${GLOBAL_VERSION}"
            "$PACKAGES""
        fi        
        echo "package-version-list=$(cat "${CACHE_DIR}/pkgs_args.txt")" >> $GITHUB_OUTPUT
        echo "all-package-version-list=$(cat "${CACHE_DIR}/pkgs_installed.txt")" >> $GITHUB_OUTPUT
      shell: bash
      env:
        CACHE_HIT: "${{ steps.load-cache.outputs.cache-hit }}"
        EXEC_INSTALL_SCRIPTS: "${{ inputs.execute_install_scripts }}"
        DEBUG: "${{ inputs.debug }}"
        PACKAGES: "${{ inputs.packages }}"

    - id: upload-logs
      if: ${{ inputs.debug == 'true' }}
      uses: actions/upload-artifact@v4
      with:
        name: cache-apt-pkgs-logs_${{ env.CACHE_KEY }}
        path: ~/cache-apt-pkgs/*.log

    - id: save-cache
      if: ${{ ! steps.load-cache.outputs.cache-hit }}
      uses: actions/cache/save@v4
      with:
        path: ~/cache-apt-pkgs
        key: ${{ steps.load-cache.outputs.cache-primary-key }}

    - id: clean-cache
      run: |
        rm -rf ~/cache-apt-pkgs
      shell: bash