ormolu.yaml

# FUTUREWORK: add this to `ci.dhall`?

name: Ormolu
on:
  - pull_request

jobs:
  ormolu:
    runs-on: ubuntu-18.04
    steps:
      - uses: "actions/checkout@v1"

      - uses: "actions/setup-haskell@v1.1.4"
        id: setup-haskell-cabal
        with:
          cabal-version: "${{ matrix.cabal }}"
          enable-stack: false
          ghc-version: "${{ matrix.ghc }}"

      - uses: "actions/cache@v2"
        name: Cache
        with:
          key: "${{ runner.os }}"
          path: |
            "${{ steps.setup-haskell-cabal.outputs.cabal-store }}"
            ~/.cabal/packages
            ~/.cabal/store
            ~/.cabal/bin
            dist-newstyle
            ~/.local/bin

      - name: Install dependencies
        run: |
          export PATH=$PATH:$HOME/.cabal/bin:$HOME/.local/bin
          export ORMOLU_VERSION=$(cat ./layout/ormolu.version)
          (ormolu -v 2>/dev/null | grep -q $ORMOLU_VERSION) || (cabal update && cabal install ormolu --constraint="ormolu ==$ORMOLU_VERSION")
          test -e $HOME/.local/bin/yq || pip3 install yq
        shell: bash

      - name: Ormolu
        run: |
          export PATH=$PATH:$HOME/.cabal/bin:$HOME/.local/bin
          ./layout/ormolu.sh -c
        shell: bash

    strategy:
      matrix:
        cabal:
          - '3.2'
        ghc:
          - '8.10.1'