ci-cabal-install.yml

name: CI

# Trigger the workflow on push or pull request, but only for the master branch
on:
  pull_request:
    types:
      - opened
      - synchronize
  push:
    branches: [master]

jobs:
  cabal:
    name: ${{ matrix.os }} / ghc ${{ matrix.ghc }}
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest]
        ghc: ['9.8.4'] # bootstrapping compiler

    steps:
    - uses: actions/checkout@v4
      with:
        submodules: "recursive"

    - uses: haskell/ghcup-setup@v1

    - id: ghcup
      run: |
        ghcup config set cache true
        echo "basedir=$(ghcup whereis basedir)" >> $GITHUB_OUTPUT

    - id: ghcup-cache
      name: Cache GHCup basedir
      uses: actions/cache@v4
      with:
        key: ghcup-basedir-${{ github.run_id }}
        restore-keys: ghcup-basedir-
        path: ${{ steps.ghcup.outputs.basedir }}

    - run: |
        ghcup install ghc --set ${{ matrix.ghc }}
        ghcup install cabal --set

    - id: cabal-paths
      run: |
        cabal user-config init
        echo "store=$(cabal path --store-dir)" >> $GITHUB_OUTPUT
        echo "remote-repo-cache=$(cabal path --remote-repo-cache)" >> $GITHUB_OUTPUT

    - name: Restore Hackage index
      uses: actions/cache/restore@v4
      with:
        key: hackage-${{ github.run_id }}
        restore-keys: hackage-
        path: ${{ steps.cabal-paths.outputs.remote-repo-cache }}
        
    - run: cabal update

    - name: Restore build artifacts
      uses: actions/cache/restore@v4
      with:
        key: ${{ matrix.os }}-${{ matrix.ghc }}-${{ github.run_id }}
        restore-keys: ${{ matrix.os }}-${{ matrix.ghc }}-
        path: |
          ${{ steps.cabal-paths.outputs.store }}
          libraries/Cabal/dist-newstyle
          _build

    - name: Build stage1
      run: make stage1

    - name: Upload artifacts
      uses: actions/upload-artifact@v4
      with:
        name: stage1
        path: _stage1

    - name: Save GHCup cache
      uses: actions/cache/save@v4
      if: always()
      with:
        key: ghcup-${{ github.run_id }}
        path: ${{ steps.ghcup.outputs.cachedir }}

    - name: Save Hackage index
      uses: actions/cache/save@v4
      if: always()
      with:
        key: hackage-${{ github.run_id }}
        path: ${{ steps.cabal-paths.outputs.remote-repo-cache }}

    - name: Save build artifacts
      if: always()
      uses: actions/cache/save@v4
      with:
        key: ${{ matrix.os }}-${{ matrix.ghc }}-${{ github.run_id }}
        path: |
          ${{ steps.cabal-paths.outputs.store }}
          libraries/Cabal/dist-newstyle
          _build