name: Toolchain
# Build the submitted crate with a native toolchain from Alire

on:
  pull_request:
    paths:
      - 'index/**.toml'

jobs:

  build:
    name: ${{ matrix.os }}

    runs-on: ${{ matrix.os }}

    strategy:
      fail-fast: false
      matrix:
        os:
          - macos-latest
          - ubuntu-latest
          - windows-latest

    steps:
    - name: Check out alire-index
      uses: actions/checkout@v2
      with:
        fetch-depth: 0
        # Needed to be able to diff and obtain changed files. Furthermore, we
        # need the full history or else grafted partial branches confuse the
        # changed files detectors (in both scripts/gh-build-crate.sh and
        # check-author action).

    # For the devel branch we need a compiler available to build alr in
    # setup-alire. We will be able to get rid of this once composite actions
    # support conditional steps.

    - name: Set up GNAT toolchain (FSF)
      if: (matrix.os == 'ubuntu-latest') && (contains(github.base_ref, 'devel-'))
      uses: ada-actions/toolchain@ce2020
      with:
        distrib: fsf # faster install?

    - name: Set up GNAT toolchain (Community)
      if: (matrix.os != 'ubuntu-latest') && (contains(github.base_ref, 'devel-'))
      uses: ada-actions/toolchain@ce2020
      with:
        distrib: community

    # By default, this sets up the newest indexed native toolchain
    - name: Set up stable `alr`
      if: contains(github.base_ref, 'stable-')
      uses: alire-project/setup-alire@v1

    # By default, this sets up the newest indexed native toolchain
    - name: Set up devel `alr`
      if: contains(github.base_ref, 'devel-')
      uses: alire-project/setup-alire@v1
      with:
        branch: 'master'

    - name: Install tar from msys2 (Windows) # Git tar in Actions VM does not seem to work)
      if: matrix.os == 'windows-latest'
      run: C:\Users\runneradmin\.cache\alire\msys64\usr\bin\pacman --noconfirm -S tar

    - name: Test crate
      run: scripts/gh-build-crate.sh
      shell: bash