on:
  pull_request:
    branches:
      master

jobs:
  Compile:
    strategy:
      matrix:
        agda-ref: ["v2.6.2"]
        ghc-ver: ["8.10.2"]
        cabal-ver: ["3.4.0.0"]

    runs-on: ubuntu-latest

    steps:
      - uses: actions/cache@v2
        name: Cache cabal packages
        id: cache-cabal
        with:
          path: |
            ~/.cabal/packages
            ~/.cabal/store
            ~/.cabal/bin
            dist-newstyle
          key: ${{ runner.os }}-${{ matrix.ghc-ver }}-${{ matrix.cabal-ver }}-${{ matrix.agda-ref }}

      - name: Install cabal
        if: steps.cache-cabal.outputs.cache-hit != 'true'
        uses: actions/setup-haskell@v1.1.3
        with:
          ghc-version: ${{ matrix.ghc-ver }}
          cabal-version: ${{ matrix.cabal-ver }}

      - name: Put cabal programs in PATH
        run: echo "~/.cabal/bin" >> $GITHUB_PATH

      - name: Download Agda from github
        if: steps.cache-cabal.outputs.cache-hit != 'true'
        uses: actions/checkout@v2
        with:
          repository: agda/agda
          path: agda
          ref: ${{ matrix.agda-ref }}

      - name: Install Agda
        if: steps.cache-cabal.outputs.cache-hit != 'true'
        run: |
          cabal update
          cabal install --overwrite-policy=always --ghc-options='-O2 +RTS -M6G -RTS' alex-3.2.5
          cabal install --overwrite-policy=always --ghc-options='-O2 +RTS -M6G -RTS' happy-1.19.12
          cd agda
          mkdir -p doc
          touch doc/user-manual.pdf
          cabal install --overwrite-policy=always --ghc-options='-O1 +RTS -M6G -RTS'

      - name: Checkout master
        uses: actions/checkout@v2

      - name: Compile main library
        run: |
          agda Everything/Unsafe.agda
          agda Everything/Safe.agda
          agda Everything/WithK.agda
          agda Everything/Guardedness.agda