name: format

on:
  push:
    branches:
      - 'master'
    tags: '*'
  pull_request:

jobs:
  check:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        julia-version: ['1']
        julia-arch: [x64]
        os: [ubuntu-latest]
    steps:
      - uses: julia-actions/setup-julia@latest
        with:
          version: ${{ matrix.julia-version }}

      - uses: actions/checkout@v2
      - name: Install JuliaFormatter and format
        run: |
          julia -e 'using Pkg; Pkg.add(PackageSpec(name="JuliaFormatter"))'
          julia -e 'using JuliaFormatter; format(["src", "test"], verbose=true)'
      - name: Format check
        run: |
          julia -e '
          out = Cmd(`git diff --name-only`) |> read |> String
          if out == ""
              exit(0)
          else
              @error "These files have not been formatted:\n$out"
              exit(1)
          end'