name: Lint and validation

"on":
  pull_request:
  workflow_dispatch:

jobs:
  validate:
    name: Validate Packer templates are reasonable
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Install Packer
        uses: ./.github/actions/install_packer

      - name: Restore Packer plugin cache
        uses: actions/cache/restore@v3
        id: cache-restore
        with:
          path: ~/.config/packer/plugins
          key: ${{ runner.os }}-${{ hashFiles('sources/build.pkr.hcl') }}

      - name: Install Packer plugins
        shell: bash
        run: packer init sources

      - name: Cache Packer plugins
        uses: actions/cache/save@v3
        if: always()
        with:
          path: ~/.config/packer/plugins
          key: ${{ steps.cache-restore.outputs.cache-primary-key }}

      - name: Run validate check
        run: |
          set -exo pipefail
          for vars in $(find distros/ -name '*.pkrvars.hcl*'); do
            if [[ "${vars}" == *.sh ]]; then
              "./${vars}"
              vars=${vars%.sh}
            fi
            packer validate -except=upload -var-file=${vars} sources/
          done

      - name: Run Packer format check
        run: git ls-files | grep -E -e '.hcl$' | xargs -L 1 packer fmt -check

  lint:
    name: Lint shell code
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Install shellcheck
        run: |
          shellcheck --version
          shellcheck $(find . -name '*.sh')