# Fast checks always run; native builds run for code/CI changes.
# Cross-compilation is opt-in through Run workflow; release builds remain in release.yml.
name: CI

on:
  pull_request:
  workflow_dispatch:
    inputs:
      cross_compile:
        description: "Also check WebAssembly and RISC-V (before a release)"
        type: boolean
        default: false

permissions:
  contents: read

concurrency:
  group: ci-${{ github.ref }}
  cancel-in-progress: true

env:
  CARGO_TERM_COLOR: always

jobs:
  changes:
    name: Select checks
    runs-on: ubuntu-24.04
    outputs:
      native: ${{ steps.paths.outputs.native }}
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          fetch-depth: 0
      - id: paths
        name: Detect code and CI changes
        env:
          EVENT_NAME: ${{ github.event_name }}
          BASE_SHA: ${{ github.event.pull_request.base.sha }}
          HEAD_SHA: ${{ github.event.pull_request.head.sha }}
        run: |
          native=false
          if [ "$EVENT_NAME" = workflow_dispatch ]; then
            native=true
          else
            # Compare both old and new paths of renames; unknown paths run native checks.
            git diff --no-renames --name-only -z "$BASE_SHA...$HEAD_SHA" > "$RUNNER_TEMP/ci-paths"
            while IFS= read -r -d '' path; do
              case "$path" in
                .github/workflows/ci.yml) native=true ;;
                *.rs|Cargo.toml|Cargo.lock|*/Cargo.toml|.cargo/*|rust-toolchain*) native=true ;;
                docs/*|*.md|.github/*|packaging/*|LICENSE*|NOTICE|THIRD-PARTY-LICENSES.txt) ;;
                *) native=true ;;
              esac
            done < "$RUNNER_TEMP/ci-paths"
          fi
          echo "native=$native" >> "$GITHUB_OUTPUT"

  checks:
    name: Format and repository checks
    runs-on: ubuntu-24.04
    timeout-minutes: 15
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
      - uses: dtolnay/rust-toolchain@stable
        with:
          components: rustfmt
      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
        with:
          key: repo-checks
      - name: Format
        run: cargo fmt --all -- --check
      - name: Asset attribution
        run: cargo xtask assets
      - name: Licences
        run: cargo xtask licences --check
      - name: Dependency layers
        run: cargo xtask layers

  clippy:
    name: Native Linux Clippy
    needs: changes
    if: needs.changes.outputs.native == 'true'
    runs-on: ubuntu-24.04
    timeout-minutes: 30
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
      - uses: dtolnay/rust-toolchain@stable
        with:
          components: clippy
      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
        with:
          key: native-clippy
      - run: cargo clippy --workspace --all-targets --profile ci --locked -- -D warnings

  tests:
    name: Native Linux tests
    needs: changes
    if: needs.changes.outputs.native == 'true'
    runs-on: ubuntu-24.04
    timeout-minutes: 90
    env:
      CARGO_INCREMENTAL: "0"
      RUSTC_WRAPPER: sccache
      SCCACHE_GHA_ENABLED: "true"
      SCCACHE_IGNORE_SERVER_IO_ERROR: "1"
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
      - uses: dtolnay/rust-toolchain@stable
      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
        with:
          key: native-tests
      - name: Set up compiler cache
        uses: mozilla-actions/sccache-action@fc920bf0ec8de6ee65d409111f7ec508035751ba # v0.0.11
        with:
          version: v0.16.0
      - name: Compile tests
        run: cargo test --workspace --profile ci --locked --no-run
      - name: Run tests
        # Every test binary at once (cargo test runs them one after another).
        run: cargo xtask test --locked
      - name: Compiler cache statistics
        if: always()
        run: sccache --show-stats

  oracle:
    name: Reference tests
    needs: changes
    if: needs.changes.outputs.native == 'true'
    runs-on: ubuntu-24.04
    timeout-minutes: 60
    env:
      CARGO_INCREMENTAL: "0"
      RUSTC_WRAPPER: sccache
      SCCACHE_GHA_ENABLED: "true"
      SCCACHE_IGNORE_SERVER_IO_ERROR: "1"
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
      - uses: dtolnay/rust-toolchain@stable
      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
        with:
          key: oracle
      - name: Set up compiler cache
        uses: mozilla-actions/sccache-action@fc920bf0ec8de6ee65d409111f7ec508035751ba # v0.0.11
        with:
          version: v0.16.0
      - name: Build the command line
        run: cargo build -p solvecraft-cli --profile ci --locked
      - name: Replay tests/oracle and compare with expected.json
        run: cargo xtask oracle --cli target/ci/solvecraft-cli
      - name: Upload the report
        if: always()
        uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
        with:
          name: oracle-report
          path: docs/oracle.md

  # Preserve the existing check name for branch protection, including docs-only PRs.
  ci:
    needs: [changes, checks, clippy, tests, oracle]
    if: always()
    runs-on: ubuntu-24.04
    steps:
      - name: Verify required checks
        env:
          CHANGES: ${{ needs.changes.result }}
          CHECKS: ${{ needs.checks.result }}
          NATIVE: ${{ needs.changes.outputs.native }}
          CLIPPY: ${{ needs.clippy.result }}
          TESTS: ${{ needs.tests.result }}
          ORACLE: ${{ needs.oracle.result }}
        run: |
          test "$CHANGES" = success
          test "$CHECKS" = success
          if [ "$NATIVE" = true ]; then
            test "$CLIPPY" = success
            test "$TESTS" = success
            test "$ORACLE" = success
          fi

  wasm:
    name: Compile WebAssembly (manual)
    if: github.event_name == 'workflow_dispatch' && inputs.cross_compile
    runs-on: ubuntu-24.04
    timeout-minutes: 30
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
      - uses: dtolnay/rust-toolchain@stable
        with:
          targets: wasm32-unknown-unknown
      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
        with:
          key: wasm
      - run: cargo xtask wasm

  riscv64-gates:
    name: Compile RISC-V (manual)
    if: github.event_name == 'workflow_dispatch' && inputs.cross_compile
    runs-on: ubuntu-24.04
    timeout-minutes: 30
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
      - name: Check out craft-fonts
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          repository: storytold/craft-fonts
          ref: ${{ env.CRAFT_FONTS_REF }}
          path: craft-fonts
      - uses: dtolnay/rust-toolchain@stable
        with:
          targets: riscv64gc-unknown-linux-gnu
      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
        with:
          key: riscv64
      - name: Install cross-compilation dependencies
        run: |
          # Ubuntu's regular archive serves amd64; RISC-V packages live in ports.
          # The 24.04 runner uses deb822 sources, so scope every Ubuntu stanza.
          sudo sed -i '/^Architectures:/d; /^Types:/a Architectures: amd64' /etc/apt/sources.list.d/ubuntu.sources
          sudo tee /etc/apt/sources.list.d/riscv64.sources >/dev/null <<'EOF'
          Types: deb
          URIs: http://ports.ubuntu.com/ubuntu-ports
          Suites: noble noble-updates noble-backports noble-security
          Components: main restricted universe multiverse
          Architectures: riscv64
          Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg
          EOF
          sudo dpkg --add-architecture riscv64
          sudo apt-get update
          sudo apt-get install -y gcc-riscv64-linux-gnu libasound2-dev:riscv64 libxkbcommon-dev:riscv64 \
            libwayland-dev:riscv64 libx11-dev:riscv64 libxrandr-dev:riscv64 libxi-dev:riscv64 libgl1-mesa-dev:riscv64
      - name: Cargo check on RISC-V
        env:
          CARGO_TARGET_RISCV64GC_UNKNOWN_LINUX_GNU_LINKER: riscv64-linux-gnu-gcc
          PKG_CONFIG_SYSROOT_DIR: /
          PKG_CONFIG_PATH: /usr/lib/riscv64-linux-gnu/pkgconfig:/usr/share/pkgconfig
          PKG_CONFIG_ALLOW_CROSS: 1
        run: |
          . "$HOME/.cargo/env"
          export CRAFT_FONTS_DIR="$PWD/craft-fonts"
          cargo check --all-targets --locked --target riscv64gc-unknown-linux-gnu