name: CI OSes

on:
  workflow_dispatch:
  # we build Rust and Zcash parameter caches on main,
  # so they can be shared by all branches:
  # https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows#restrictions-for-accessing-a-cache
  push:
    branches:
      - main
    paths:
      # production code and test code
      - '**/*.rs'
      # hard-coded checkpoints
      # TODO: skip proptest regressions
      - '**/*.txt'
      # dependencies
      - '**/Cargo.toml'
      - '**/Cargo.lock'
      # workflow definitions
      - '.github/workflows/ci.yml'
  pull_request:
    paths:
      # code and tests
      - '**/*.rs'
      # hard-coded checkpoints and proptest regressions
      - '**/*.txt'
      # test data snapshots
      - '**/*.snap'
      # dependencies
      - '**/Cargo.toml'
      - '**/Cargo.lock'
      - '**/deny.toml'
      # workflow definitions
      - '.github/workflows/continous-integration-os.yml'

env:
  CARGO_INCREMENTAL: 0
  RUST_BACKTRACE: full
  RUST_LIB_BACKTRACE: full
  COLORBT_SHOW_HIDDEN: '1'

jobs:
  test:
    name: Test ${{ matrix.rust }} on ${{ matrix.os }}
    # The large timeout is to accommodate:
    # - Windows builds (75 minutes, typically 30-50 minutes), and
    # - parameter downloads (an extra 90 minutes, but only when the cache expires)
    timeout-minutes: 165
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        # TODO: Windows was removed for now, see https://github.com/ZcashFoundation/zebra/issues/3801
        os: [ubuntu-latest, macos-latest]
        rust: [stable]

    steps:
      - uses: actions/checkout@v3.0.2
        with:
          persist-credentials: false

      - uses: actions-rs/toolchain@v1
        with:
          toolchain: ${{ matrix.rust }}
          profile: minimal
          override: true

      - uses: Swatinem/rust-cache@v1

      - name: cargo fetch
        uses: actions-rs/cargo@v1.0.3
        with:
          command: fetch

      - name: Install LLVM on Windows
        if: matrix.os == 'windows-latest'
        run: |
          choco install llvm -y
          echo "C:\Program Files\LLVM\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
          echo "LIBCLANG_PATH=C:\Program Files\LLVM\bin" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append

      - name: Skip network tests on Ubuntu and Windows
        # Ubuntu runners don't have reliable network or DNS during test steps.
        # Windows runners have an unreliable network.
        shell: bash
        if: matrix.os != 'macos-latest'
        run: echo "ZEBRA_SKIP_NETWORK_TESTS=1" >> $GITHUB_ENV

      - name: Minimise proptest cases on macOS and Windows
        # We set cases to 1, because some tests already run 1 case by default.
        # We keep maximum shrink iterations at the default value, because it only happens on failure.
        #
        # Windows compilation and tests are slower than other platforms.
        # macOS runners do extra network tests, so they take longer.
        shell: bash
        if: matrix.os != 'ubuntu-latest'
        run: |
          echo "PROPTEST_CASES=1" >> $GITHUB_ENV
          echo "PROPTEST_MAX_SHRINK_ITERS=1024" >> $GITHUB_ENV

      - name: Change target output directory on Windows
        # Windows doesn't have enough space on the D: drive, so we redirect the build output to the
        # larger C: drive.
        # TODO: Remove this workaround once the build is more efficient (#3005).
        if: matrix.os == 'windows-latest'
        run: |
          mkdir C:\zebra-target
          echo "CARGO_TARGET_DIR=C:\zebra-target" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append

      # Modified from:
      # https://github.com/zcash/librustzcash/blob/c48bb4def2e122289843ddb3cb2984c325c03ca0/.github/workflows/ci.yml#L20-L33
      #
      # TODO: split get-params-path and download-params examples into their own crate,
      #       to speed up compilation
      #       compile examples in release mode, to speed up downloads
      - name: Fetch path to Zcash parameters
        working-directory: ./zebra-consensus
        shell: bash
        run: echo "ZCASH_PARAMS=$(cargo run --example get-params-path)" >> $GITHUB_ENV
      - name: Cache Zcash parameters
        id: cache-params
        uses: actions/cache@v3
        with:
          path: ${{ env.ZCASH_PARAMS }}
          key: ${{ runner.os }}-sprout-and-sapling-params
      - name: Fetch Zcash parameters
        if: steps.cache-params.outputs.cache-hit != 'true'
        working-directory: ./zebra-consensus
        run: cargo run --example download-params

      - name: Run tests
        uses: actions-rs/cargo@v1.0.3
        with:
          command: test
          args: --verbose --workspace -- --nocapture

      # Explicitly run any tests that are usually #[ignored]

      - name: Run zebrad large sync tests
        # Skip the entire step on Ubuntu and Windows, because the test would be skipped anyway due to ZEBRA_SKIP_NETWORK_TESTS
        if: matrix.os == 'macos-latest'
        uses: actions-rs/cargo@v1.0.3
        with:
          command: test
          # Note: this only runs the zebrad acceptance tests, because re-running all the test binaries is slow on Windows
          args: --verbose --package zebrad --test acceptance -- --nocapture --include-ignored sync_large_checkpoints_

  test-fake-activation-heights:
    name: Test ${{ matrix.rust }} zebra-state with fake activation heights on ubuntu-latest
    timeout-minutes: 60
    runs-on: ubuntu-latest
    strategy:
      matrix:
        rust: [stable]

    steps:
      - uses: actions/checkout@v3.0.2
        with:
          persist-credentials: false

      - uses: actions-rs/toolchain@v1
        with:
          toolchain: ${{ matrix.rust }}
          profile: minimal
          override: true

      - uses: Swatinem/rust-cache@v1

      - name: cargo fetch
        uses: actions-rs/cargo@v1.0.3
        with:
          command: fetch

      # This test changes zebra-chain's activation heights,
      # which can recompile all the Zebra crates,
      # so we want its build products to be cached separately.
      #
      # Also, we don't want to accidentally use the fake heights in other tests.
      - name: Run tests with fake activation heights
        uses: actions-rs/cargo@v1.0.3
        env:
          TEST_FAKE_ACTIVATION_HEIGHTS: ''
        with:
          command: test
          # Note: this only runs the zebra-state crate tests,
          # because re-running all the test binaries can be slow
          args: --verbose --package zebra-state --lib -- --nocapture --include-ignored with_fake_activation_heights

  build-chain-no-features:
    name: Build ${{ matrix.rust }} zebra-chain w/o features on ubuntu-latest
    timeout-minutes: 60
    runs-on: ubuntu-latest
    strategy:
      matrix:
        rust: [stable, beta]

    steps:
      - uses: actions/checkout@v3.0.2
        with:
          persist-credentials: false

      - uses: actions-rs/toolchain@v1
        with:
          toolchain: ${{ matrix.rust }}
          profile: minimal
          override: true

      - uses: Swatinem/rust-cache@v1

      - name: cargo fetch
        uses: actions-rs/cargo@v1.0.3
        with:
          command: fetch

      - name: Run build without features enabled
        working-directory: ./zebra-chain
        run: cargo build --verbose --no-default-features

  # Install Zebra with lockfile dependencies, with no caching and default features
  install-from-lockfile-no-cache:
    name: Install zebrad from lockfile without cache on ubuntu-latest
    timeout-minutes: 60
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v3.0.2
        with:
          persist-credentials: false

      - uses: actions-rs/toolchain@v1
        with:
          toolchain: stable
          profile: minimal
          override: true

      - name: Install
        uses: actions-rs/cargo@v1.0.3
        with:
          command: install
          args: --locked --path ./zebrad/ zebrad

  # Check that Cargo.lock includes any Cargo.toml changes.
  # This check makes sure the `cargo-deny` crate dependency checks are accurate.
  check-cargo-lock:
    name: Check Cargo.lock is up to date
    timeout-minutes: 60
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v3.0.2
        with:
          persist-credentials: false

      - uses: actions-rs/toolchain@v1
        with:
          toolchain: stable
          profile: minimal
          override: true

      - uses: Swatinem/rust-cache@v1

      - name: Check Cargo.lock is up to date
        uses: actions-rs/cargo@v1.0.3
        with:
          command: check
          args: --locked --all-features --all-targets

  cargo-deny:
    name: Check deny.toml ${{ matrix.checks }}
    runs-on: ubuntu-latest
    strategy:
      matrix:
        checks:
          - bans
          - sources

    # Prevent sudden announcement of a new advisory from failing ci:
    continue-on-error: ${{ matrix.checks == 'advisories' }}

    steps:
      - uses: actions/checkout@v3.0.2
        with:
          persist-credentials: false

      - uses: EmbarkStudios/cargo-deny-action@v1
        with:
          command: check ${{ matrix.checks }}
          args: --all-features --workspace

      # this check runs with optional features off
      # so we expect some warnings about "skip tree root was not found"
      - uses: EmbarkStudios/cargo-deny-action@v1
        with:
          command: check ${{ matrix.checks }}
          args: --workspace