name: checks
# verify: every pull request and every push to main, on GitHub's runners (the repository is public).
# parity: the vanilla harnesses a pull request's changes can affect, on the Mac mini's runner, which holds the
# maintainer's own Minecraft files (Horizon never downloads the game). A fork's pull request runs it only when
# a maintainer adds the run-parity label, once per label. See docs/release-flow.md.
on:
  push:
    branches: [main]
  pull_request:
    types: [opened, synchronize, reopened, labeled]
  workflow_dispatch:
permissions:
  contents: read
concurrency:
  # A new push to a pull request replaces its running checks; main's runs all finish (releases follow them).
  group: checks-${{ github.event.pull_request.number || github.sha }}-${{ github.event.action == 'labeled' && 'label' || 'run' }}
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
jobs:
  verify:
    if: github.event.action != 'labeled'
    runs-on: ubuntu-latest
    timeout-minutes: 30
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - uses: actions/setup-python@v5
        with:
          python-version: '3.12'
      - name: Does this pull request need Rust checks?
        if: github.event_name == 'pull_request'
        id: rust
        env:
          BASE_SHA: ${{ github.event.pull_request.base.sha }}
          HEAD_SHA: ${{ github.event.pull_request.head.sha }}
        run: python3 tools/ci/rust_changes.py "$BASE_SHA" "$HEAD_SHA" >> "$GITHUB_OUTPUT"
      - name: Keep game artifacts out of Git
        run: |
          python tools/check_public_tree.py
          python tools/check_public_tree.py --history
      - name: Test offline research tooling
        run: python -m unittest discover -s tests -v
      - name: Install Rust toolchain and the ALSA and udev headers the client links against
        if: steps.rust.outputs.required != 'false'
        run: |
          sudo apt-get update && sudo apt-get install -y --no-install-recommends libasound2-dev libudev-dev
          rustup toolchain install stable --profile minimal --component rustfmt --component clippy --target wasm32-unknown-unknown
      # Dependencies and the workspace's own build, saved from main's runs (pull requests read main's cache).
      - uses: Swatinem/rust-cache@v2
        if: steps.rust.outputs.required != 'false'
        with:
          shared-key: verify
          save-if: ${{ github.ref == 'refs/heads/main' }}
      - name: Check formatting and lint
        if: steps.rust.outputs.required != 'false'
        run: |
          cargo +stable fmt --all -- --check
          cargo +stable clippy --workspace --all-targets -- -D warnings
      - name: Test Rust core and voxel kernel correctness
        if: steps.rust.outputs.required != 'false'
        run: cargo +stable test --workspace
  parity:
    if: >-
      github.event_name == 'pull_request' && (
        (github.event.pull_request.head.repo.full_name == github.repository && github.event.action != 'labeled') ||
        (github.event.action == 'labeled' && github.event.label.name == 'run-parity'))
    runs-on: [self-hosted, horizon-game]
    timeout-minutes: 120  # a change to core crates reruns ~300 harnesses: ~60-90 min on the Mac mini
    steps:
      - uses: actions/checkout@v4
        with:
          # The commit the event names: a fork's later pushes need another run-parity label.
          ref: ${{ github.event.pull_request.head.sha }}
          fetch-depth: 0
          persist-credentials: false
          # Keeps .local/ (parity state, probe builds, oracle results) and target/ between runs.
          clean: false
      - uses: dtolnay/rust-toolchain@stable
      - name: Tools from the runner
        run: bash tools/ci/runner-env.sh
      - name: Vanilla data, and resources prepared by this preparer
        run: bash tools/ci/vanilla-data.sh
      - name: The harnesses this change can affect
        env:
          PARITY_HOSTS: ''
        run: python3 tools/parity.py --changed ${{ github.event.pull_request.base.sha }} --timeout 2400  # world_spawn takes ~1480 s on a busy runner
      - name: Logs of the failed harnesses
        if: failure()
        uses: actions/upload-artifact@v4
        with:
          name: parity-logs
          path: .local/parity-runner/logs/
          if-no-files-found: ignore
          retention-days: 3
  # Horizon never downloads the game. These jobs need a self-hosted Linux runner
  # (label horizon-game) holding the maintainer's own copy: the official launcher's
  # game directory in HORIZON_MINECRAFT_DIR and the pinned server jar in
  # HORIZON_SERVER_JAR. Start them by hand: gh workflow run checks --ref <branch>.
  vanilla-parity:
    if: github.event_name == 'workflow_dispatch'
    runs-on: [self-hosted, linux, horizon-game]
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: '3.12'
      - name: Install Rust toolchain
        run: rustup toolchain install stable --profile minimal
      - uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: '25'
      - name: Compare Rust foundations with pinned vanilla client and server bytecode
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_rust_parity.py --prepare
      - name: Check Rust world-data interoperability with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_world_parity.py
      - name: Compare scheduled ticks and saved tick data with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_tick_parity.py
      - name: Compare simulation geometry and cached block collision shapes
        env:
          RUSTUP_TOOLCHAIN: stable
        run: |
          python tools/test_geometry_parity.py
          python tools/test_collision_parity.py
      - name: Compare noise samplers and density kernels with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_noise_parity.py
      - name: Compare compiled density samplers with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_density_parity.py
      - name: Compare world-generation JSON codecs with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_worldgen_parity.py
      - name: Compare heightmap predicates and chunk mutations with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_heightmap_parity.py
      - name: Compare pre-light chunk status transitions and block writes
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_chunk_stage_parity.py
      - name: Compare feature placement into resident neighboring chunks
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_feature_region_parity.py
      - name: Compare nested feature selectors and sequences
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_feature_graph_parity.py
      - name: Compare named feature holders and placed-feature tags
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_feature_catalog_parity.py
      - name: Compare configured fill-layer block placement
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_fill_layer_parity.py
      - name: Compare replacement-rule codecs and evaluation
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_rule_test_parity.py
      - name: Compare simple-block placement and feature composition
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_simple_block_parity.py
      - name: Compare block-column sampling and obstruction
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_block_column_parity.py
      - name: Compare vertical pillars and cap feature placement
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_pillar_parity.py
      - name: Compare exactly-one-neighbor feature spreading
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_neighbor_spread_parity.py
      - name: Compare block-pile support and placement
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_block_pile_parity.py
      - name: Compare disk replacement and postprocessing
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_disk_parity.py
      - name: Compare block-blob support search and geometry
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_block_blob_parity.py
      - name: Compare spring placement and fluid tick scheduling
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_spring_parity.py
      - name: Compare vine attachment priority and placement
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_vines_parity.py
      - name: Compare underwater magma floor scans and occlusion
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_underwater_magma_parity.py
      - name: Compare blue-ice seeding and growth attempts
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_blue_ice_parity.py
      - name: Compare spike geometry and discontinuous roots
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_spike_parity.py
      - name: Compare End podium construction and destruction requests
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_end_podium_parity.py
      - name: Rust End gateway parity
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_end_gateway_parity.py
      - name: Compare bonus chest placement and conditional loot seeding
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_bonus_chest_parity.py
      - name: Compare recursive chorus generation and connection refreshes
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_chorus_plant_parity.py
      - name: Compare small speleothem patches and waterlogged points
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_speleothem_parity.py
      - name: Compare replacement blob search and Manhattan shells
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_replace_blobs_parity.py
      - name: Compare bamboo stalks, podzol patches and leafy caps
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_bamboo_parity.py
      - name: Compare Nether delta rims and shifted contents
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_delta_parity.py
      - name: Compare biome freezing and snow eligibility
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_biome_weather_parity.py
      - name: Compare frozen top layers and snowy ground updates
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_snow_freeze_parity.py
      - name: Compare generation-stage tick storage and routing
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_generation_tick_parity.py
      - name: Compare below-zero upgrade metadata codecs
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_retrogen_data_parity.py
      - name: Compare below-zero upgrade lifecycle and block transformations
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_retrogen_chunk_parity.py
      - name: Compare chunk-status metadata, ordering and codecs
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_chunk_status_parity.py
      - name: Compare proto-chunk block-entity storage and coordinates
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_block_entity_storage_parity.py
      - name: Compare ordered single-block replacement features
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_replace_block_parity.py
      - name: Compare scattered ore placement and air-exposure checks
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_scattered_ore_parity.py
      - name: Compare resident bulk-section access and raw writes
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_bulk_section_parity.py
      - name: Compare biome feature ordering and cycle detection
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_feature_sort_parity.py
      - name: Compare world-generation random wrappers and seeding
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_worldgen_random_parity.py
      - name: Compare biome filtering and top-level feature context
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_biome_placement_parity.py
      - name: Compare biome decoration feature scheduling and seeding
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_decoration_parity.py
      - name: Compare decoration against resident biome and terrain sections
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_decoration_region_parity.py
      - name: Compare block-state provider choices and rotation
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_state_provider_parity.py
      - name: Compare contained fluids and height queries with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_fluid_parity.py
      - name: Compare entity obstruction with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_entity_obstruction_parity.py
      - name: Compare block solidity and replaceability with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_block_properties_parity.py
      - name: Compare face slicing and block support with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_face_support_parity.py
      - name: Compare cached block support with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_block_support_parity.py
      - name: Compare dynamic block support with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_dynamic_support_parity.py
      - name: Compare moving-piston collision and interpolation with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_piston_shape_parity.py
      - name: Compare supported block survival rules with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_block_survival_parity.py
      - name: Compare noise-stage chunk filling with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_terrain_parity.py
      - name: Compare structure terrain-adaptation density with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_structure_density_parity.py
      - name: Compare seeded material bands and surface queries with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_material_surface_parity.py
      - name: Compare material condition codecs and rule evaluation with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_material_condition_parity.py
      - name: Compare biome temperatures and cache behavior with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_biome_temperature_parity.py
      - name: Compare badlands and frozen-ocean extensions with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_material_extension_parity.py
      - name: Compare bundled material-rule libraries with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_material_rule_library_parity.py
      - name: Compare fixed, checkerboard and End biome sources with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_biome_source_parity.py
      - name: Compare seeded cave paths and failure state with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_cave_carver_parity.py
      - name: Compare seeded canyon paths and width factors with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_canyon_carver_parity.py
      - name: Compare initial block-writing feature algorithms with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_basic_feature_parity.py
      - name: Compare feature placement chains with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_feature_placement_parity.py
      - name: Compare feature placement primitives with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_placement_parity.py
      - name: Compare anchored height providers with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_height_provider_parity.py
      - name: Compare scalar value providers with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_value_provider_parity.py
      - name: Compare cave and canyon geometric primitives with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_carving_geometry_parity.py
      - name: Compare carving-mask traversal and callback mutations with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_carving_mask_parity.py
      - name: Compare registry-bound biome-source codecs with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_biome_source_codec_parity.py
      - name: Compare all four biome-source kinds in chunk generation with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_biome_generation_parity.py
      - name: Compare chunk biome filling and failure state with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_biome_chunk_parity.py
      - name: Compare biome zoom and seed obfuscation with pinned vanilla
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_biome_zoom_parity.py
      - name: Compare surface-stage chunks with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_material_stage_parity.py
      - name: Compare block-state JSON codecs with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_block_state_codec_parity.py
      - name: Compare vertical anchors with pinned vanilla client and server
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_anchor_parity.py
      - name: Compare float logarithms at domain and rounding boundaries
        env:
          RUSTUP_TOOLCHAIN: stable
        run: python tools/test_float_log_parity.py
  portable-mod:
    if: github.event_name == 'workflow_dispatch'
    runs-on: [self-hosted, linux, horizon-game]
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: '3.12'
      - uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: '25'
      - name: Compile original mod and test metrics
        run: python tools/build_mod.py
      - name: Verify streaming JFR analysis against the JDK exporter
        run: python tools/test_jfr.py
      - name: Verify ZGC pause and allocation event interpretation
        run: python tools/test_jfr.py --gc zgc
      - name: Build pinned portable packs
        run: python tools/build_pack.py
      - name: Measure isolated worker pacing on this platform
        run: python -c "from tools.build_mod import benchmark_workers; benchmark_workers()"
      - name: Measure isolated debounce queue polling
        run: python -c "from tools.build_mod import benchmark_debounce; benchmark_debounce()"
      - name: Measure wakeable idle queue latency
        run: python -c "from tools.build_mod import benchmark_idle; benchmark_idle()"
      - name: Measure object allocations with compact headers off and on
        run: python -c "from tools.build_mod import benchmark_headers; benchmark_headers()"
      - name: Test pack integrity and comparisons
        run: python -m unittest discover -s tests -v
      - name: Start recommended OpenGL macOS clients and verify framebuffer readback
        if: runner.os == 'macOS'
        run: |
          python tools/test_client_graphics.py --native-display
          cp dist/client-graphics-smoke.json dist/client-graphics-macos-title.json
          python tools/test_client_graphics.py --native-display --world
          cp dist/client-graphics-smoke.json dist/client-graphics-macos-world.json
      - name: Compile the private dispatch fixture
        run: python -c "from tools.build_mod import build_dispatch_fixture; build_dispatch_fixture()"
      - name: Compile the private integrated-server graphics fixture
        run: python -c "from tools.build_mod import build_integration_fixture; build_integration_fixture('server-graphics', 'dev.horizonlab.metrics.ServerGraphicsIntegration', fixture_dependencies={})"
      - name: Compile the private tick-manager state fixture
        run: python -c "from tools.build_mod import build_integration_fixture; build_integration_fixture('tick-state', 'dev.horizonlab.metrics.TickStateIntegration')"
      - name: Compile the private terrain tick membership fixture
        run: python -c "from tools.build_mod import build_tick_dedup_fixture; build_tick_dedup_fixture()"
      - name: Compile the private culling whitelist fixture
        run: python -c "from tools.build_mod import build_culling_empty_fixture; build_culling_empty_fixture()"
      - name: Compile the private culling ray geometry fixture
        run: python -c "from tools.build_mod import build_integration_fixture; build_integration_fixture('culling-rays', 'dev.horizonlab.dispatch.CullingRayIntegration', ['entityculling'], ['CullingRayAccess'])"
      - name: Compile the private terrain position lookup fixture
        run: python -c "from tools.build_mod import build_integration_fixture; build_integration_fixture('terrain-position', 'dev.horizonlab.dispatch.PositionIntegration')"
      - name: Compile the private terrain quad reuse fixture
        run: python -c "from tools.build_mod import build_integration_fixture; build_integration_fixture('quad-reuse', 'dev.horizonlab.dispatch.QuadReuseIntegration')"
      - name: Compile the private object-size agent and terrain quad fixture
        run: python -c "from tools.test_quad_sizes import build_agent; from tools.build_mod import build_integration_fixture; build_agent(); build_integration_fixture('quad-size', 'dev.horizonlab.dispatch.QuadSizeIntegration')"
      - name: Compile the private terrain read shutdown fixture
        run: python -c "from tools.build_mod import build_integration_fixture; build_integration_fixture('terrain-read', 'dev.horizonlab.dispatch.TerrainReadIntegration')"
      - name: Install headless graphics libraries for applied-hook checks
        if: runner.os == 'Linux'
        run: sudo apt-get update && sudo apt-get install -y xvfb libgl1 libegl1 libvulkan1 mesa-vulkan-drivers libasound2t64 libxkbcommon0
      - name: Verify integrated-server graphics report against the actual device
        run: python tools/test_server_graphics.py ${{ runner.os == 'macOS' && '--native-display' || '' }}
      - name: Exercise the applied dispatcher hooks and upstream rejection path
        if: runner.os == 'Linux'
        run: python tools/test_dispatch.py
      - name: Verify applied tick membership transitions and allocation
        if: runner.os == 'Linux'
        run: python tools/test_tick_dedup.py
      - name: Verify live culling whitelist registration and empty iteration
        if: runner.os == 'Linux'
        run: python tools/test_culling_empty.py
      - name: Compare applied culling ray geometry and provider queries
        if: runner.os == 'Linux'
        run: python tools/test_culling_rays.py
      - name: Verify actual full-data position lookup equivalence
        if: runner.os == 'Linux'
        run: python tools/test_terrain_position.py
      - name: Verify actual terrain quad geometry and allocation
        if: runner.os == 'Linux'
        run: python tools/test_quad_reuse.py
      - name: Measure actual builder and quad shallow sizes in both header modes
        if: runner.os == 'Linux'
        run: python tools/test_quad_sizes.py
      - name: Verify interrupted DH reads and preserved shared futures
        if: runner.os == 'Linux'
        run: python tools/test_terrain_read.py
      - name: Upload original mod and pack manifests only
        uses: actions/upload-artifact@v4
        with:
          name: horizon-linux
          path: |
            dist/*.mrpack
            dist/horizon-*.jar
            dist/worker-pacing-benchmark.txt
            dist/debounce-queue-benchmark.txt
            dist/idle-queue-benchmark.txt
            dist/object-header-benchmark.txt
            dist/dispatch-integration.json
            dist/tick-dedup-integration.json
            dist/culling-empty-integration.json
            dist/terrain-read-integration.json
            dist/culling-rays-integration.json
            dist/terrain-position-integration.json
            dist/quad-reuse-integration.json
            dist/quad-size-integration.json
            dist/server-graphics-smoke.json
            dist/client-graphics-smoke.json
            dist/client-graphics-macos-title.json
            dist/client-graphics-macos-world.json
          retention-days: 3