ci.yml

name: CI

on:
  pull_request:
  merge_group:

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

env:
  RUST_BACKTRACE: 1
  RUSTFLAGS: -Dwarnings
  RUSTDOCFLAGS: -Dwarnings
  MSRV: "1.85"
  # NOTE: When adding a new example, add it here AND to the test matrix below (because we cannot create matrix entries dynamically)
  RS_EXAMPLES_LIST: "browser-chat browser-chat/cli browser-echo custom-router dumbpipe-web framed-messages frosty iroh-automerge iroh-automerge-repo iroh-gateway extism/host extism/plugin extism/iroh-extism-host-functions"
  WASM_EXAMPLES_LIST: "browser-chat browser-echo"
  IROH_FORCE_STAGING_RELAYS: "1"

jobs:
  # Prepare dependencies and cache them for all other jobs
  prepare:
    name: Prepare dependencies
    runs-on: ubuntu-latest
    timeout-minutes: 20
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          submodules: recursive

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable
        with:
          components: clippy,rustfmt

      - name: Add wasm target
        run: rustup target add wasm32-unknown-unknown

      - name: Setup Rust cache
        uses: Swatinem/rust-cache@v2
        with:
          shared-key: "iroh-examples-shared"
          cache-all-crates: true

      - name: Fetch dependencies
        run: |
          for example in $RS_EXAMPLES_LIST; do
            if [ -f "$example/Cargo.toml" ]; then
              echo "Fetching dependencies for $example"
              cargo fetch --manifest-path "$example/Cargo.toml" --locked 2>/dev/null || cargo fetch --manifest-path "$example/Cargo.toml"
            fi
          done

  # Check formatting for all examples in a single job (fast)
  fmt:
    name: Format check
    runs-on: ubuntu-latest
    timeout-minutes: 10
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          submodules: recursive

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable
        with:
          components: rustfmt

      - name: Check formatting
        run: |
          for example in $RS_EXAMPLES_LIST; do
            if [ -f "$example/Cargo.toml" ]; then
              echo "Checking format: $example"
              cargo fmt --manifest-path "$example/Cargo.toml" --all -- --check
            fi
          done

  # Build WASM examples
  wasm:
    name: WASM build
    runs-on: ubuntu-latest
    timeout-minutes: 20
    needs: prepare
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          submodules: recursive

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable

      - name: Add wasm target
        run: rustup target add wasm32-unknown-unknown

      - name: Setup Rust cache
        uses: Swatinem/rust-cache@v2
        with:
          shared-key: "iroh-examples-shared"

      - name: Build WASM examples
        run: |
          for example in $WASM_EXAMPLES_LIST; do
            echo "Building WASM for $example"
            cd "$example"
            case "$example" in
              browser-echo)
                RUSTFLAGS='--cfg getrandom_backend="wasm_js"' cargo build --target wasm32-unknown-unknown --lib
                ;;
              browser-chat)
                RUSTFLAGS='--cfg getrandom_backend="wasm_js"' cargo build --target wasm32-unknown-unknown -p chat-browser
                ;;
              *)
                echo "Unknown WASM example: $example"
                exit 1
                ;;
            esac
            cd ..
          done
        env:
          RUST_LOG: ${{ runner.debug && 'DEBUG' || 'INFO'}}

  # Parallel testing matrix for all examples
  test:
    name: Test ${{ matrix.example }}
    runs-on: ubuntu-latest
    timeout-minutes: 20
    needs: prepare
    strategy:
      fail-fast: false
      matrix:
        example:
          - browser-chat
          - browser-chat/cli
          - browser-echo
          - custom-router
          - dumbpipe-web
          - framed-messages
          - frosty
          - iroh-automerge
          - iroh-automerge-repo
          - iroh-gateway
          - extism/host
          - extism/plugin
          - extism/iroh-extism-host-functions
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          submodules: recursive

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable
        with:
          components: clippy

      - name: Setup Rust cache
        uses: Swatinem/rust-cache@v2
        with:
          shared-key: "iroh-examples-shared"
          workspaces: ${{ matrix.example }}

      - name: Check
        run: |
          echo "Checking ${{ matrix.example }}"
          cargo check --manifest-path "${{ matrix.example }}/Cargo.toml" --all-features
        env:
          RUST_LOG: ${{ runner.debug && 'DEBUG' || 'INFO'}}

      - name: Clippy
        run: |
          echo "Running clippy on ${{ matrix.example }}"
          cargo clippy --manifest-path "${{ matrix.example }}/Cargo.toml" --all-features
        env:
          RUST_LOG: ${{ runner.debug && 'DEBUG' || 'INFO'}}

      - name: Test
        run: |
          echo "Testing ${{ matrix.example }}"
          cargo test --manifest-path "${{ matrix.example }}/Cargo.toml" --all-features
        env:
          RUST_LOG: ${{ runner.debug && 'DEBUG' || 'INFO'}}