streamly/.github/workflows/packdiff.yml at master · composewell/streamly · GitHub

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name: API

on:
  workflow_dispatch:
  pull_request:

jobs:
  packdiff:
    name: "Signature diff: master vs PR"
    env:
      GHCVER: 9.8.4
      GHCUP_VERSION: 0.1.50.2

    runs-on: ubuntu-latest

    steps:

    # This should happen before cache restore.
    - name: Remove ~/.ghcup symlink
      run: |
        rm -f ~/.ghcup

    - name: Cache ghcup and ghc (non-Windows)
      uses: actions/cache@v4
      if: runner.os != 'Windows'
      with:
        path: |
          ~/.ghcup
        key: ${{ runner.os }}-ghcup-${{ env.GHCUP_VERSION }}-${{ env.GHCVER }}

    - name: Cache hackage package index (non-Windows)
      uses: actions/cache@v4
      if: runner.os != 'Windows'
      with:
        path: |
            ~/.cache/cabal/packages
        # Bump the key version to clear the cache
        key: cache-cabal-packages

    - name: Cache packdiff (non-Windows)
      uses: actions/cache@v4
      if: runner.os != 'Windows'
      with:
        path: |
            ~/.local/bin
            ~/.local/state/cabal
        # Bump the key version to clear the cache
        key: packdiff-ghc-${{ env.GHCVER }}

    - name: Checkout the current branch
      uses: actions/checkout@v4
      with:
        fetch-depth: 0

    # Use a sane PATH, especially to pick the right GHC
    - name: Set PATH to add .local and .ghcup
      run: echo "$HOME/.local/bin:$HOME/.ghcup/bin:/bin:/usr/bin" > $GITHUB_PATH

    - name: Download ghc
      run: |
        if ! ghc --version 2>/dev/null | grep -q "$GHCVER"
        then
          curl -sL -o ./ghcup https://downloads.haskell.org/~ghcup/$GHCUP_VERSION/x86_64-linux-ghcup-$GHCUP_VERSION
          chmod +x ./ghcup
          export GHCUP_INSTALL_BASE_PREFIX=$HOME
          ./ghcup install ghc $GHCVER
          ./ghcup set ghc $GHCVER
          ./ghcup install cabal
        fi
        # XXX update only if not present
        cabal update

    - name: Install packdiff
      run: |
        if [ ! -f $HOME/.local/bin/packdiff ]; then
          mkdir -p $HOME/.local/bin
          # IMPORTANT: do not replace $HOME with ~, tilde is not expanded by
          # shell in the middle of a command string.
          cabal install packdiff --project-file=cabal.project.packdiff --installdir=$HOME/.local/bin --overwrite-policy=always
        fi

    - name: API diff for streamly-core
      run: packdiff diff streamly-core $(git rev-parse origin/master) streamly-core $(git rev-parse HEAD)

    - name: API diff for streamly
      run: packdiff diff streamly $(git rev-parse origin/master) streamly $(git rev-parse HEAD)