formatting.yml

name: Check formatting

on: [push, pull_request, workflow_dispatch]

env:
  OPAMVERBOSE: 1

jobs:
  build:
    # GitHub allows matrix variables in more places than env variables
    strategy:
      matrix:
        version: [5.0.0]
        os: [ubuntu-latest]
        fmt: [0.26.0]

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

    steps:
    - uses: actions/checkout@v3

    - name: System dependencies
      run: |
        sudo apt install build-essential libgmp-dev z3 cvc4 opam

    - name: Restore cached opam
      id: cache-opam-restore
      uses: actions/cache/restore@v3
      with:
        path: ~/.opam
        key: ${{ matrix.os }}-${{ matrix.version }}-${{ matrix.fmt }}-fmt

    - name: Setup opam
      if: steps.cache-opam-restore.outputs.cache-hit != 'true'
      run: |
        opam init --yes --no-setup --shell=sh --compiler=${{ matrix.version }}
        eval $(opam env)
        opam install "ocamlformat=${{ matrix.fmt }}" --yes

    - name: Save cached opam
      if: steps.cache-opam-restore.outputs.cache-hit != 'true'
      id: cache-opam-save
      uses: actions/cache/save@v3
      with:
        path: ~/.opam
        key: ${{ steps.cache-opam-restore.outputs.cache-primary-key }}

    - name: Format Sail
      run: |
        eval $(opam env)
        dune fmt
        git diff-index --quiet HEAD --