ci-nix.yaml

name: "CI"

# Limit concurrent runs of this workflow within a single PR
concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true
on:
  # We're using merge-chains; so this needs to run then.
  merge_group:
  push:
    branches:
    - master
    - release
  pull_request:
  schedule:
    # Everyday at 4:00 AM
    - cron: "0 4 * * *"
  # Allows to trigger runs on any branch
  workflow_dispatch:

permissions:
  checks: write
  pull-requests: write

jobs:
  build-test:
    name: "Build & test"
    runs-on: ubuntu-latest
    strategy:
      matrix:
        include:
          - package: hydra-plutus
          - package: hydra-tx
          - package: hydra-chain-observer
          - package: hydra-node
          - package: hydra-tui
          - package: hydra-cluster
    steps:
    - name: 📥 Checkout repository
      uses: actions/checkout@v4

    - name: ❄ Setup Nix/Cachix
      uses: ./.github/actions/nix-cachix-setup
      with:
        authToken: '${{ secrets.CACHIX_CARDANO_SCALING_AUTH_TOKEN }}'

    - name: ❓ Test
      if: ${{ matrix.package != 'hydra-tui' }}
      run: |
        cd ${{ matrix.package }}
        nix build .#${{ matrix.package }}-tests
        nix develop .#${{ matrix.package }}-tests --command tests

    # This one is special, as it requires a tty.
    - name: ❓ Test (TUI)
      id: test_tui
      if: ${{ matrix.package == 'hydra-tui' }}
      # https://giters.com/gfx/example-github-actions-with-tty
      # The default shell does not allocate a TTY which breaks some tests
      shell: 'script -q -e -c "bash {0}"'
      env:
        TERM: "xterm"
      run: |
        cd ${{ matrix.package  }}
        nix build .#${{ matrix.package }}-tests
        nix develop .#${{ matrix.package }}-tests --command tests

    # NOTE: This depends on the path used in hydra-cluster e2e tests
    - name: 💾 Upload logs
      if: always()
      uses: actions/upload-artifact@v4
      with:
        name: hydra-cluster-e2e-test-logs
        path: /tmp/nix-shell.*/hydra-cluster-e2e-*/logs/*
        if-no-files-found: ignore

  haddock:
    name: "Build haddock using nix"
    runs-on: ubuntu-latest
    steps:
    - name: 📥 Checkout repository
      uses: actions/checkout@v4

    - name: ❄ Setup Nix/Cachix
      uses: ./.github/actions/nix-cachix-setup
      with:
        authToken: '${{ secrets.CACHIX_CARDANO_SCALING_AUTH_TOKEN }}'

    - name: 📚 Documentation (Haddock)
      run: |
        nix build .#haddocks
        mkdir -p haddocks
        cp -aL result/* haddocks/

    - name: 💾 Upload haddock artifact
      uses: actions/upload-artifact@v4
      with:
        name: haddocks
        path: haddocks

  benchmarks:
    name: "Benchmarks"
    runs-on: ubuntu-latest
    strategy:
      matrix:
        include:
          - package: hydra-node
            bench: tx-cost
            options: '--output-directory $(pwd)/../benchmarks'
          - package: hydra-node
            bench: micro
            options: '-o $(pwd)/../benchmarks/ledger-bench.html'
          - package: hydra-cluster
            bench: bench-e2e
            options: 'datasets datasets/1-node.json datasets/3-nodes.json --output-directory $(pwd)/../benchmarks --timeout 1000s'
    steps:
    - name: 📥 Checkout repository
      uses: actions/checkout@v4

    - name: ❄ Setup Nix/Cachix
      uses: ./.github/actions/nix-cachix-setup
      with:
        authToken: '${{ secrets.CACHIX_CARDANO_SCALING_AUTH_TOKEN }}'

    - name: 📈 Benchmark
      run: |
        mkdir -p benchmarks
        cd ${{ matrix.package }}
        nix build .#${{ matrix.package }}-bench
        nix develop .#${{ matrix.package }}-bench --command ${{ matrix.bench }} ${{ matrix.options }}

    - name: 💾 Upload build & test artifacts
      uses: actions/upload-artifact@v4
      with:
        name: benchmarks-${{matrix.package}}-${{matrix.bench}}
        path: benchmarks

    # NOTE: This depends on the path used in hydra-cluster bench
    - name: 💾 Upload logs
      if: always()
      uses: actions/upload-artifact@v4
      with:
        name: hydra-cluster-bench-logs
        path: /tmp/nix-shell.*/bench-*/**/*.log
        if-no-files-found: ignore

  publish-benchmark-results:
    name: Publish benchmark results
    if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
    # TODO: this is actually only requires the tx-cost benchmark results
    needs: [benchmarks]
    runs-on: ubuntu-latest
    steps:
    - name: 📥 Download generated documentation
      uses: actions/download-artifact@v4
      with:
        path: artifact
        pattern: benchmarks-*
        merge-multiple: true

    - name: ⚙ Prepare comment body
      id: comment-body
      run: |
        # Drop first 5 header lines and demote headlines one level
        cat <(cat artifact/transaction-cost.md | sed '1,5d;s/^#/##/') <(cat artifact/end-to-end-benchmarks.md | sed '1,5d;s/^#/##/') | grep -v '^:::' > comment-body.md

    - name: 🔎 Find Comment
      uses: peter-evans/find-comment@v3
      id: find-comment
      with:
        issue-number: ${{ github.event.pull_request.number }}
        comment-author: 'github-actions[bot]'
        body-includes: Transaction costs

    - name: ✏ Create or update comment
      uses: peter-evans/create-or-update-comment@v4
      with:
        comment-id: ${{ steps.find-comment.outputs.comment-id }}
        edit-mode: replace
        issue-number: ${{ github.event.pull_request.number }}
        body-file: comment-body.md
        reactions: rocket

  nix-flake-check:
    name: "nix flake check"
    runs-on: ubuntu-latest
    steps:
    - name: 📥 Checkout repository
      uses: actions/checkout@v4

    - name: ❄ Setup Nix/Cachix
      uses: ./.github/actions/nix-cachix-setup
      with:
        authToken: '${{ secrets.CACHIX_CARDANO_SCALING_AUTH_TOKEN }}'

    - name: ❄ Nix Flake Check
      run: |
        nix flake check -L


  build-specification:
    name: "Build specification using nix"
    runs-on: ubuntu-latest
    steps:
    - name: 📥 Checkout repository
      uses: actions/checkout@v4

    - name: ❄ Setup Nix/Cachix
      uses: ./.github/actions/nix-cachix-setup
      with:
        authToken: '${{ secrets.CACHIX_CARDANO_SCALING_AUTH_TOKEN }}'

    - name: ❄ Build specification PDF
      run: |
        nix build .#spec && cp result/*.pdf .

    - name: 💾 Upload specification
      uses: actions/upload-artifact@v4
      with:
        name: hydra-spec
        path: |
          ./*.pdf


  documentation:
    name: Documentation
    needs: [haddock,benchmarks,build-test,build-specification]
    runs-on: ubuntu-latest
    steps:
    - name: 📥 Checkout repository
      uses: actions/checkout@v4
      with:
        # For the cardanonical json schemas
        submodules: true
        # Ensure we have all history with all commits
        fetch-depth: 0

    - name: ❄ Setup Nix/Cachix
      uses: ./.github/actions/nix-cachix-setup
      with:
        authToken: '${{ secrets.CACHIX_CARDANO_SCALING_AUTH_TOKEN }}'

    - name: Set up and use the "ci" devShell
      uses: nicknovitski/nix-develop@v1
      with:
        arguments: ".#ci"

    # Technically, we don't need this, given we're in a Nix shell;
    # but we will keep it for the caching.
    - name: 🚧 Setup Node.js
      uses: actions/setup-node@v4
      with:
        node-version: 18
        cache: 'yarn'
        cache-dependency-path: docs/yarn.lock

    - name: ❓ Test API reference
      working-directory: docs
      run: |
        yarn
        yarn validate

    - name: 📥 Download benchmark results
      uses: actions/download-artifact@v4
      with:
        path: docs/benchmarks
        pattern: benchmarks-*
        merge-multiple: true

    - name: 📥 Download haddock documentation
      uses: actions/download-artifact@v4
      with:
        name: haddocks
        path: docs/static/haddock

    - name: 📥 Download specification PDF
      uses: actions/download-artifact@v4
      with:
        name: hydra-spec
        path: docs/static/

    - name: 📚 Documentation sanity check
      working-directory: docs
      run: |
        yarn
        yarn build-dev


  # Compute the cost difference between this branch and master.
  tx-cost-diff:
    name: Compute cost differences
    runs-on: ubuntu-latest
    # Only run on PR
    if: github.event_name == 'pull_request'
    steps:
    - name: "Checkout the PR as the 'new' source"
      uses: actions/checkout@v4

    - name: ❄ Setup Nix/Cachix
      uses: ./.github/actions/nix-cachix-setup
      with:
        authToken: '${{ secrets.CACHIX_CARDANO_SCALING_AUTH_TOKEN }}'

    - name: Set up and use the "ci" devShell
      uses: nicknovitski/nix-develop@v1
      with:
        arguments: ".#costDifferences"

    - name: "Compute the difference markdown"
      run: |
        nix run ".#tx-cost-diff"

    - name: 🔎 Find Comment
      uses: peter-evans/find-comment@v3
      id: find-comment
      with:
        issue-number: ${{ github.event.pull_request.number }}
        comment-author: 'github-actions[bot]'
        body-includes: Transaction cost differences

    - name: ✏ Create or update comment
      uses: peter-evans/create-or-update-comment@v4
      with:
        comment-id: ${{ steps.find-comment.outputs.comment-id }}
        edit-mode: replace
        issue-number: ${{ github.event.pull_request.number }}
        body-file: diff.md