action.yml

name: "Test supported GHC versions"
description: "Generate a test matrix from your cabal file's `tested-with` stanza"

inputs:
  cabal-file:
    description: "The path to your cabal file, e.g. somefolder/myproject.cabal"
    required: true
  version:
    description: "Version of the get-tested tool"
    required: false
    default: ""
  windows:
    description: "Enable Windows runner, latest version"
    required: false
    default: 'false'
    deprecationMessage: "Please use 'windows-version: latest' instead."
  windows-version:
    description: "Enable Windows runner. If both `windows` and `windows-version` inputs are set, the explicit version will take priority"
    required: false
    default: ""
  macos:
    description: "Enable macOS runner, latest version"
    required: false
    default: 'false'
    deprecationMessage: "Please use 'macos-version: latest' instead."
  macos-version:
    description: "Enable macOS runner.  If both `macos` and `macos-version` inputs are set, the explicit version will take priority"
    required: false
    default: ""
  ubuntu:
    description: "Enable Ubuntu runner, latest version"
    required: false
    default: 'false'
    deprecationMessage: "Please use 'ubuntu-version: latest' instead."
  ubuntu-version:
    description: "Enable Ubuntu runner.  If both `ubuntu` and `ubuntu-version` inputs are set, the explicit version will take priority"
    required: false
    default: ""
  newest:
    description: "Enable only the newest GHC version found in the cabal file"
    required: false
    default: 'false'
  oldest:
    description: "Enable only the oldest GHC version found in the cabal file"
    required: false
    default: 'false'
  versions-only:
    description: "Return the list of version only"
    required: false
    default: 'false'

outputs:
  matrix:
    description: "The GHC version matrix"
    value: ${{ steps.set-matrix.outputs.matrix }}

runs:
  using: "composite"
  steps:
    - name: Checkout base repo
      uses: actions/checkout@v7

      # The following does not work:
      #
      #   uses: Kleidukos/get-tested/setup-get-tested@${{ github.action_ref }}
      #
      # See: https://github.com/actions/runner/issues/895
    - name: Set up get-tested
      uses: Kleidukos/get-tested/setup-get-tested@449950cc728817063e27a6731e3ae6589e980870
      with:
        version: ${{ inputs.version }}

    - name: Set up OS options
      shell: bash
      run: |
        set_versions() {
        local name="$1"        # UBUNTU / WINDOWS / MACOS
        local flag="$2"        # --ubuntu-version
        local versions="$3"    # "latest,18.04"
        local legacy="$4"      # true/false
        local legacy_flag="$5" # --ubuntu
        local result=""
        if [[ -n "$versions" ]]; then
        IFS=',' read -ra arr <<< "$versions"
        for v in "${arr[@]}"; do
          v="${v#"${v%%[![:space:]]*}"}"
          v="${v%"${v##*[![:space:]]}"}"
          result+=" $flag $v"
        done
        elif [[ "$legacy" == "true" ]]; then
          echo "::warning title=Legacy option::$name legacy flag used"
          result="$legacy_flag"
        fi
        echo "$name=$result" >> "$GITHUB_ENV"
        }
        set_versions "UBUNTU"  "--ubuntu-version"  "${{ inputs.ubuntu-version }}"  "${{ inputs.ubuntu }}"  "--ubuntu"
        set_versions "WINDOWS" "--windows-version" "${{ inputs.windows-version }}" "${{ inputs.windows }}" "--windows"
        set_versions "MACOS"   "--macos-version"   "${{ inputs.macos-version }}"   "${{ inputs.macos }}"   "--macos"


    - name: Set up `oldest` and `newest` options
      shell: bash
      run: |
        echo "::debug::Is --newest enabled: ${{ inputs.newest }}"
        echo "::debug::Is --oldest enabled: ${{ inputs.oldest }}"

        if [[ "${{ inputs.oldest }}" == "true" && "${{ inputs.newest }}" == "true" ]]; then
          echo "::error title=Incompatible options::You cannot use the 'oldest' and 'newest' options together!"
          exit 1
        fi

        if [[ "${{ inputs.oldest }}" == "true" ]]
        then
          echo "::debug::oldest version enabled"
          echo "RELATIVE_VERSION=--oldest" >> "$GITHUB_ENV"
        elif [[ "${{ inputs.newest }}" == "true" ]]
        then
          echo "::debug::newest version enabled"
          echo "RELATIVE_VERSION=--newest" >> "$GITHUB_ENV"
        else
          echo "::debug::No relative version selected"
        fi
          

    - name: Extract the tested GHC versions
      id: set-matrix
      shell: bash
      run: |
        requested_version="${{ inputs.version }}"
        minium_modern_version="0.1.9.0"
        version_only_min_version="0.1.10.0~rc2"
        versions_only="${{ inputs.versions-only }}"
        normalized_requested="$(echo "$requested_version" | sed 's/-rc/~rc/')"

        head-or-default () {
          [[ "$requested_version" == "" ]] || [[ "$requested_version" == "get-tested-head" ]]
        }

        if [[ "$versions_only" == "true" ]] && { head-or-default || dpkg --compare-versions "$normalized_requested" ge "$version_only_min_version"; }; then
          set -x
          ./get-tested $RELATIVE_VERSION "${{ inputs.cabal-file }}"
          { set +x; } 2>/dev/null
          exit 0
        fi

        if [[ "$WINDOWS" == "" ]] && [[ "$MACOS" == "" ]] && [[ "$UBUNTU" == "" ]]; then
           echo "At least one runner needed, please check the README.md in the get-tested repo"
           exit 1
        fi
        if [[ "$requested_version" == "" ]] || [[ "$requested_version" == "get-tested-head" ]] || dpkg --compare-versions "$normalized_requested" ge "$minium_modern_version"; then
          set -x
          ./get-tested $WINDOWS $MACOS $UBUNTU $RELATIVE_VERSION "${{ inputs.cabal-file }}"
          { set +x; } 2>/dev/null
        else
          set -x
          ./get-tested $WINDOWS $MACOS $UBUNTU $RELATIVE_VERSION "${{ inputs.cabal-file }}" >> "$GITHUB_OUTPUT"
          { set +x; } 2>/dev/null
        fi


branding:
  icon: 'list'
  color: 'blue'