presubmit-stack.yaml

name: Haskell Stack

on:
  push:
    branches: [master]
  pull_request:
    branches: [master]
    types: [opened, synchronize]

permissions: {}

jobs:
  test:
    name: CI
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false # don't cancel other jobs if one fails
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
        # We don't split on multiple resolvers as the ~/.stack grows to ~700MB
        # whereas all others (including Cabal ones) barely reach 50MB. Instead,
        # we only use nightly as the resolver, as this should handle the newest
        # GHC and is also the place where failures will be reported from Stack.
        resolver: [nightly]
    steps:
      - name: Checkout code
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          persist-credentials: false

      - name: Setup Haskell Compiler (stack)
        id: setup-haskell
        uses: haskell-actions/setup@dd344bc1cec854a369df8814ce17ef337d6e6170 # v2.7.6
        with:
          enable-stack: true
          stack-no-global: true

      - name: Cache .stack-work
        uses: actions/cache@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4.1.2
        with:
          path: .stack-work
          key: stack-work-${{ matrix.os }}-${{ matrix.resolver }}-${{ hashFiles('stack.yaml', '**/*.cabal') }}-${{ hashFiles('internal/**','src/**','app/**','tests/**','benchmarks/**') }}
          restore-keys: |
            stack-work-${{ matrix.os }}-${{ matrix.resolver }}-${{ hashFiles('stack.yaml', '**/*.cabal') }}-
            stack-work-${{ matrix.os }}-${{ matrix.resolver }}-

      - name: Cache ~/.stack
        uses: actions/cache@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4.1.2
        with:
          path: ${{ steps.setup-haskell.outputs.stack-root }}
          key: stack-root-${{ matrix.os }}-${{ matrix.resolver }}-${{ hashFiles('stack.yaml', '**/*.cabal') }}
          restore-keys: stack-root-${{ matrix.os }}-${{ matrix.resolver }}-

      # Check this before building, otherwise stack will overwrite the cabal file.
      - name: Validate cabal file is properly generated from HPack
        if: matrix.os != 'windows-latest' # Since we're using `diff -u`, cannot run on Windows
        run: |
          mv hindent.cabal hindent.cabal.original
          # See https://github.com/commercialhaskell/stack/issues/3697#issuecomment-353729540.
          stack build --resolver=${{ matrix.resolver }} --dry-run
          diff -u hindent.cabal.original hindent.cabal

      - name: Get dependencies
        run: stack build --resolver=${{ matrix.resolver }} --only-dependencies --test --bench --no-run-tests --no-run-benchmarks

      - name: Build code
        run: stack build --resolver=${{ matrix.resolver }} --test --bench --no-run-tests --no-run-benchmarks

      - name: Test code
        run: stack test --resolver=${{ matrix.resolver }}

      - name: Benchmark code
        run: stack bench --resolver=${{ matrix.resolver }}

      - name: Generate documentation
        run: stack haddock --resolver=${{ matrix.resolver }}