network-isomorphism-solver 0.2.0

name: CI/CD Pipeline

on:
  push:
    branches:
      - main
  pull_request:
    types: [opened, synchronize, reopened]
  workflow_dispatch:
    inputs:
      release_mode:
        description: 'Manual release mode'
        required: true
        type: choice
        default: 'instant'
        options:
          - instant
          - changelog-pr
      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: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

env:
  CARGO_TERM_COLOR: always
  RUSTFLAGS: -Dwarnings
  CARGO_TOKEN: ${{ secrets.CARGO_TOKEN }}

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 }}
    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
        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 ===
  # Docs-only PRs (./docs folder, markdown files) don't require changelog fragments
  changelog:
    name: Changelog Fragment Check
    runs-on: ubuntu-latest
    needs: [detect-changes]
    if: github.event_name == 'pull_request' && needs.detect-changes.outputs.any-code-changed == 'true'
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

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

          # Get changed files in PR
          CHANGED_FILES=$(git diff --name-only origin/${{ github.base_ref }}...HEAD)

          # Check if any source files changed (excluding docs and config)
          SOURCE_CHANGED=$(echo "$CHANGED_FILES" | grep -E "^(src/|tests/|scripts/|Cargo\.toml)" | wc -l)

          if [ "$SOURCE_CHANGED" -gt 0 ] && [ "$FRAGMENTS" -eq 0 ]; then
            echo "::error::No changelog fragment found. Please add a changelog entry in changelog.d/"
            echo ""
            echo "To create a changelog fragment:"
            echo "  Create a new .md file in changelog.d/ with your changes"
            echo ""
            echo "See changelog.d/README.md for more information."
            exit 1
          fi

          echo "Changelog check passed"

  # === LINT AND FORMAT CHECK ===
  # Lint runs independently of changelog check - it's a fast check that should always run
  # See: https://github.com/link-assistant/hive-mind/pull/1024 for why this dependency was removed
  lint:
    name: Lint and Format Check
    runs-on: ubuntu-latest
    needs: [detect-changes]
    # Note: always() is required because detect-changes is skipped on workflow_dispatch,
    # and without always(), this job would also be skipped even though its condition includes workflow_dispatch.
    # See: https://github.com/actions/runner/issues/491
    if: |
      always() && !cancelled() && (
        github.event_name == 'push' ||
        github.event_name == 'workflow_dispatch' ||
        needs.detect-changes.outputs.rs-changed == 'true' ||
        needs.detect-changes.outputs.toml-changed == 'true' ||
        needs.detect-changes.outputs.mjs-changed == 'true' ||
        needs.detect-changes.outputs.docs-changed == 'true' ||
        needs.detect-changes.outputs.workflow-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
            target
          key: ${{ runner.os }}-cargo-${{ hashFiles('**/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
        run: node scripts/check-file-size.mjs

  # === TEST ===
  # Test runs independently of changelog check
  test:
    name: Test (${{ matrix.os }})
    runs-on: ${{ matrix.os }}
    needs: [detect-changes, changelog]
    # Run if: push event, OR changelog succeeded, OR changelog was skipped (docs-only PR)
    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
            target
          key: ${{ runner.os }}-cargo-${{ hashFiles('**/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 package - only runs if lint and test pass
  build:
    name: Build Package
    runs-on: ubuntu-latest
    needs: [lint, test]
    if: always() && !cancelled() && 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
            target
          key: ${{ runner.os }}-cargo-build-${{ hashFiles('**/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 ===
  # Automatic release on push to main using changelog fragments
  # This job automatically bumps version based on fragments in changelog.d/
  auto-release:
    name: Auto Release
    needs: [lint, test, build]
    # Note: always() ensures consistent behavior with other jobs that depend on jobs using always().
    if: |
      always() && !cancelled() &&
      github.event_name == 'push' &&
      github.ref == 'refs/heads/main' &&
      needs.build.result == 'success'
    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
        run: node scripts/get-bump-type.mjs

      - 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 "v$CURRENT_VERSION" >/dev/null 2>&1; then
              echo "No changelog fragments and v$CURRENT_VERSION already released"
              echo "should_release=false" >> $GITHUB_OUTPUT
            else
              echo "No changelog fragments but v$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'
        run: |
          node scripts/version-and-commit.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: Publish to Crates.io
        if: steps.check.outputs.should_release == 'true'
        id: publish-crate
        run: |
          PACKAGE_NAME=$(grep '^name = ' Cargo.toml | head -1 | sed 's/name = "\(.*\)"/\1/')
          PACKAGE_VERSION=$(grep '^version = ' Cargo.toml | head -1 | sed 's/version = "\(.*\)"/\1/')
          echo "Package: $PACKAGE_NAME@$PACKAGE_VERSION"

          echo "=== Attempting to publish to crates.io ==="

          # Try to publish and capture the result
          set +e  # Don't exit on error
          cargo publish --token ${{ secrets.CARGO_TOKEN }} --allow-dirty 2>&1 | tee publish_output.txt
          PUBLISH_EXIT_CODE=$?
          set -e  # Re-enable exit on error

          if [ $PUBLISH_EXIT_CODE -eq 0 ]; then
            echo "Successfully published $PACKAGE_NAME@$PACKAGE_VERSION to crates.io"
            echo "publish_result=success" >> $GITHUB_OUTPUT
          elif grep -q "already uploaded" publish_output.txt || grep -q "already exists" publish_output.txt; then
            echo "Version $PACKAGE_VERSION already exists on crates.io - this is OK"
            echo "publish_result=already_exists" >> $GITHUB_OUTPUT
          else
            echo "Failed to publish for unknown reason"
            cat publish_output.txt
            echo "publish_result=failed" >> $GITHUB_OUTPUT
            exit 1
          fi

      - name: Report crates.io publish status
        if: steps.check.outputs.should_release == 'true'
        run: |
          if [ "${{ steps.publish-crate.outputs.publish_result }}" = "success" ]; then
            echo "Package was successfully published to crates.io"
          elif [ "${{ steps.publish-crate.outputs.publish_result }}" = "already_exists" ]; then
            echo "Package version already exists on crates.io - no action needed"
          else
            echo "Publishing to crates.io failed - please check the logs"
          fi

      - name: Create GitHub Release
        if: steps.check.outputs.should_release == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          PACKAGE_NAME=$(grep '^name = ' Cargo.toml | head -1 | sed 's/name = "\(.*\)"/\1/')
          node scripts/create-github-release.mjs \
            --release-version "${{ steps.current_version.outputs.version }}" \
            --repository "${{ github.repository }}" \
            --crates-io-url "https://crates.io/crates/$PACKAGE_NAME"

  # === MANUAL INSTANT RELEASE ===
  # Manual release via workflow_dispatch - only after CI passes
  manual-release:
    name: Instant Release
    needs: [lint, test, build]
    # Note: always() is required to evaluate the condition when dependencies use always().
    # The build job ensures lint and test passed before this job runs.
    if: |
      always() && !cancelled() &&
      github.event_name == 'workflow_dispatch' &&
      github.event.inputs.release_mode == 'instant' &&
      needs.build.result == 'success'
    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
        run: |
          # Check if there are any fragments to collect
          FRAGMENTS=$(find changelog.d -name "*.md" ! -name "README.md" 2>/dev/null | wc -l)
          if [ "$FRAGMENTS" -gt 0 ]; then
            echo "Found $FRAGMENTS changelog fragment(s), collecting..."
            node scripts/collect-changelog.mjs
          else
            echo "No changelog fragments found, skipping collection"
          fi

      - name: Version and commit
        id: version
        run: |
          node scripts/version-and-commit.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: Publish to Crates.io
        if: steps.version.outputs.version_committed == 'true' || steps.version.outputs.already_released == 'true'
        id: publish-crate
        run: |
          PACKAGE_NAME=$(grep '^name = ' Cargo.toml | head -1 | sed 's/name = "\(.*\)"/\1/')
          PACKAGE_VERSION=$(grep '^version = ' Cargo.toml | head -1 | sed 's/version = "\(.*\)"/\1/')
          echo "Package: $PACKAGE_NAME@$PACKAGE_VERSION"

          echo "=== Attempting to publish to crates.io ==="

          # Try to publish and capture the result
          set +e  # Don't exit on error
          cargo publish --token ${{ secrets.CARGO_TOKEN }} --allow-dirty 2>&1 | tee publish_output.txt
          PUBLISH_EXIT_CODE=$?
          set -e  # Re-enable exit on error

          if [ $PUBLISH_EXIT_CODE -eq 0 ]; then
            echo "Successfully published $PACKAGE_NAME@$PACKAGE_VERSION to crates.io"
            echo "publish_result=success" >> $GITHUB_OUTPUT
          elif grep -q "already uploaded" publish_output.txt || grep -q "already exists" publish_output.txt; then
            echo "Version $PACKAGE_VERSION already exists on crates.io - this is OK"
            echo "publish_result=already_exists" >> $GITHUB_OUTPUT
          else
            echo "Failed to publish for unknown reason"
            cat publish_output.txt
            echo "publish_result=failed" >> $GITHUB_OUTPUT
            exit 1
          fi

      - name: Report crates.io publish status
        if: steps.version.outputs.version_committed == 'true' || steps.version.outputs.already_released == 'true'
        run: |
          if [ "${{ steps.publish-crate.outputs.publish_result }}" = "success" ]; then
            echo "Package was successfully published to crates.io"
          elif [ "${{ steps.publish-crate.outputs.publish_result }}" = "already_exists" ]; then
            echo "Package version already exists on crates.io - no action needed"
          else
            echo "Publishing to crates.io failed - please check the logs"
          fi

      - name: Create GitHub Release
        if: steps.version.outputs.version_committed == 'true' || steps.version.outputs.already_released == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          PACKAGE_NAME=$(grep '^name = ' Cargo.toml | head -1 | sed 's/name = "\(.*\)"/\1/')
          node scripts/create-github-release.mjs \
            --release-version "${{ steps.version.outputs.new_version }}" \
            --repository "${{ github.repository }}" \
            --crates-io-url "https://crates.io/crates/$PACKAGE_NAME"

  # === MANUAL CHANGELOG PR ===
  changelog-pr:
    name: Create Changelog PR
    if: github.event_name == 'workflow_dispatch' && github.event.inputs.release_mode == 'changelog-pr'
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

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

      - name: Create changelog fragment
        run: |
          BUMP_TYPE="${{ github.event.inputs.bump_type }}"
          DESCRIPTION="${{ github.event.inputs.description }}"
          TIMESTAMP=$(date +%Y%m%d%H%M%S)
          FRAGMENT_FILE="changelog.d/${TIMESTAMP}-manual-${BUMP_TYPE}.md"

          # Determine changelog category based on bump type
          case "$BUMP_TYPE" in
            major)
              CATEGORY="### Breaking Changes"
              ;;
            minor)
              CATEGORY="### Added"
              ;;
            patch)
              CATEGORY="### Fixed"
              ;;
          esac

          # Create changelog fragment with frontmatter
          mkdir -p changelog.d
          cat > "$FRAGMENT_FILE" << EOF
          ---
          bump: $BUMP_TYPE
          ---

          $CATEGORY

          EOF

          if [ -n "$DESCRIPTION" ]; then
            echo "- ${DESCRIPTION}" >> "$FRAGMENT_FILE"
          else
            echo "- Manual ${BUMP_TYPE} release" >> "$FRAGMENT_FILE"
          fi

          echo "Created changelog fragment: $FRAGMENT_FILE"
          cat "$FRAGMENT_FILE"

      - name: Create Pull Request
        uses: peter-evans/create-pull-request@v7
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          commit-message: 'chore: add changelog for manual ${{ github.event.inputs.bump_type }} release'
          branch: changelog-manual-release-${{ github.run_id }}
          delete-branch: true
          title: 'chore: manual ${{ github.event.inputs.bump_type }} release'
          body: |
            ## Manual Release Request

            This PR was created by a manual workflow trigger to prepare a **${{ github.event.inputs.bump_type }}** release.

            ### Release Details
            - **Type:** ${{ github.event.inputs.bump_type }}
            - **Description:** ${{ github.event.inputs.description || 'Manual release' }}
            - **Triggered by:** @${{ github.actor }}

            ### Next Steps
            1. Review the changelog fragment in this PR
            2. Merge this PR to main
            3. The automated release workflow will publish to crates.io and create a GitHub release