rust.yml

name: Rust CI/CD Pipeline

on:
  push:
    branches:
      - main
    paths:
      - 'rust/**'
      - 'scripts/**'
      - '.github/workflows/rust.yml'
  pull_request:
    types: [opened, synchronize, reopened]
    paths:
      - 'rust/**'
      - 'scripts/**'
      - '.github/workflows/rust.yml'
  workflow_dispatch:
    inputs:
      bump_type:
        description: 'Version bump type'
        required: true
        type: choice
        options:
          - patch
          - minor
          - major
      description:
        description: 'Release description (optional)'
        required: false
        type: string

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

env:
  CARGO_TERM_COLOR: always
  RUSTFLAGS: -Dwarnings

defaults:
  run:
    working-directory: rust

jobs:
  # === DETECT CHANGES - determines which jobs should run ===
  detect-changes:
    name: Detect Changes
    runs-on: ubuntu-latest
    if: github.event_name != 'workflow_dispatch'
    outputs:
      rs-changed: ${{ steps.changes.outputs.rs-changed }}
      toml-changed: ${{ steps.changes.outputs.toml-changed }}
      mjs-changed: ${{ steps.changes.outputs.mjs-changed }}
      docs-changed: ${{ steps.changes.outputs.docs-changed }}
      workflow-changed: ${{ steps.changes.outputs.workflow-changed }}
      any-code-changed: ${{ steps.changes.outputs.any-code-changed }}
      rust-code-changed: ${{ steps.changes.outputs.rust-code-changed }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20.x'

      - name: Detect changes
        id: changes
        working-directory: .
        env:
          GITHUB_EVENT_NAME: ${{ github.event_name }}
          GITHUB_BASE_SHA: ${{ github.event.pull_request.base.sha }}
          GITHUB_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
        run: node scripts/detect-code-changes.mjs

  # === CHANGELOG CHECK - only runs on PRs with code changes ===
  changelog:
    name: Changelog Fragment Check
    runs-on: ubuntu-latest
    needs: [detect-changes]
    if: github.event_name == 'pull_request' && needs.detect-changes.outputs.rust-code-changed == 'true'
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Check for changelog fragments
        working-directory: .
        run: |
          # Get list of fragment files (excluding README and template)
          FRAGMENTS=$(find rust/changelog.d -name "*.md" ! -name "README.md" 2>/dev/null | wc -l)

          if [ "$FRAGMENTS" -eq 0 ]; then
            echo "::warning::No changelog fragment found. Please add a changelog entry in rust/changelog.d/"
            echo ""
            echo "To create a changelog fragment:"
            echo "  Create a new .md file in rust/changelog.d/ with your changes"
            echo ""
            echo "See rust/changelog.d/README.md for more information."
            # Note: This is a warning, not a failure, to allow flexibility
            exit 0
          fi

          echo "Changelog check passed - found $FRAGMENTS fragment(s)"

  # === LINT AND FORMAT CHECK ===
  lint:
    name: Lint and Format Check
    runs-on: ubuntu-latest
    needs: [detect-changes]
    if: |
      github.event_name == 'push' ||
      github.event_name == 'workflow_dispatch' ||
      needs.detect-changes.outputs.rs-changed == 'true' ||
      needs.detect-changes.outputs.toml-changed == 'true'
    steps:
      - uses: actions/checkout@v4

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

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20.x'

      - name: Cache cargo registry
        uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            rust/target
          key: ${{ runner.os }}-cargo-${{ hashFiles('rust/Cargo.lock') }}
          restore-keys: |
            ${{ runner.os }}-cargo-

      - name: Check formatting
        run: cargo fmt --all -- --check

      - name: Run Clippy
        run: cargo clippy --all-targets --all-features

      - name: Check file size limit
        working-directory: .
        run: node scripts/check-file-size.mjs --lang rust

  # === TEST ===
  test:
    name: Test (${{ matrix.os }})
    runs-on: ${{ matrix.os }}
    needs: [detect-changes, changelog]
    if: always() && (github.event_name == 'push' || github.event_name == 'workflow_dispatch' || needs.changelog.result == 'success' || needs.changelog.result == 'skipped')
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    steps:
      - uses: actions/checkout@v4

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

      - name: Cache cargo registry
        uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            rust/target
          key: ${{ runner.os }}-cargo-${{ hashFiles('rust/Cargo.lock') }}
          restore-keys: |
            ${{ runner.os }}-cargo-

      - name: Run tests
        run: cargo test --all-features --verbose

      - name: Run doc tests
        run: cargo test --doc --verbose

  # === BUILD ===
  build:
    name: Build Package
    runs-on: ubuntu-latest
    needs: [lint, test]
    if: always() && needs.lint.result == 'success' && needs.test.result == 'success'
    steps:
      - uses: actions/checkout@v4

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

      - name: Cache cargo registry
        uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            rust/target
          key: ${{ runner.os }}-cargo-build-${{ hashFiles('rust/Cargo.lock') }}
          restore-keys: |
            ${{ runner.os }}-cargo-build-

      - name: Build release
        run: cargo build --release --verbose

      - name: Check package
        run: cargo package --list

  # === AUTO RELEASE ===
  auto-release:
    name: Auto Release
    needs: [lint, test, build]
    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

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

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20.x'

      - name: Configure git
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

      - name: Determine bump type from changelog fragments
        id: bump_type
        working-directory: .
        run: node scripts/get-bump-type.mjs --dir rust/changelog.d

      - name: Check if version already released or no fragments
        id: check
        run: |
          # Check if there are changelog fragments
          if [ "${{ steps.bump_type.outputs.has_fragments }}" != "true" ]; then
            # No fragments - check if current version tag exists
            CURRENT_VERSION=$(grep -Po '(?<=^version = ")[^"]*' Cargo.toml)
            if git rev-parse "rust-v$CURRENT_VERSION" >/dev/null 2>&1; then
              echo "No changelog fragments and rust-v$CURRENT_VERSION already released"
              echo "should_release=false" >> $GITHUB_OUTPUT
            else
              echo "No changelog fragments but rust-v$CURRENT_VERSION not yet released"
              echo "should_release=true" >> $GITHUB_OUTPUT
              echo "skip_bump=true" >> $GITHUB_OUTPUT
            fi
          else
            echo "Found changelog fragments, proceeding with release"
            echo "should_release=true" >> $GITHUB_OUTPUT
            echo "skip_bump=false" >> $GITHUB_OUTPUT
          fi

      - name: Collect changelog and bump version
        id: version
        if: steps.check.outputs.should_release == 'true' && steps.check.outputs.skip_bump != 'true'
        working-directory: .
        run: |
          node scripts/version-and-commit-rust.mjs \
            --bump-type "${{ steps.bump_type.outputs.bump_type }}"

      - name: Get current version
        id: current_version
        if: steps.check.outputs.should_release == 'true'
        run: |
          CURRENT_VERSION=$(grep -Po '(?<=^version = ")[^"]*' Cargo.toml)
          echo "version=$CURRENT_VERSION" >> $GITHUB_OUTPUT

      - name: Build release
        if: steps.check.outputs.should_release == 'true'
        run: cargo build --release

      - name: Create GitHub Release
        if: steps.check.outputs.should_release == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        working-directory: .
        run: |
          node scripts/create-github-release.mjs \
            --release-version "${{ steps.current_version.outputs.version }}" \
            --repository "${{ github.repository }}" \
            --tag-prefix "rust-v"

  # === MANUAL RELEASE ===
  manual-release:
    name: Manual Release
    needs: [lint, test, build]
    if: github.event_name == 'workflow_dispatch'
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

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

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20.x'

      - name: Configure git
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

      - name: Collect changelog fragments
        working-directory: .
        run: |
          # Check if there are any fragments to collect
          FRAGMENTS=$(find rust/changelog.d -name "*.md" ! -name "README.md" 2>/dev/null | wc -l)
          if [ "$FRAGMENTS" -gt 0 ]; then
            echo "Found $FRAGMENTS changelog fragment(s), collecting..."
            node scripts/collect-changelog.mjs --dir rust/changelog.d --output rust/CHANGELOG.md
          else
            echo "No changelog fragments found, skipping collection"
          fi

      - name: Version and commit
        id: version
        working-directory: .
        run: |
          node scripts/version-and-commit-rust.mjs \
            --bump-type "${{ github.event.inputs.bump_type }}" \
            --description "${{ github.event.inputs.description }}"

      - name: Build release
        if: steps.version.outputs.version_committed == 'true' || steps.version.outputs.already_released == 'true'
        run: cargo build --release

      - name: Create GitHub Release
        if: steps.version.outputs.version_committed == 'true' || steps.version.outputs.already_released == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        working-directory: .
        run: |
          node scripts/create-github-release.mjs \
            --release-version "${{ steps.version.outputs.new_version }}" \
            --repository "${{ github.repository }}" \
            --tag-prefix "rust-v"