release.yml

name: Release

# Auto-release on every push to main (like llama.cpp)
on:
  workflow_dispatch:
    inputs:
      create_release:
        description: 'Create new release'
        required: true
        type: boolean
  push:
    branches:
      - main
    paths:
      - '**/*.swift'
      - '**/*.c'
      - '**/*.cpp'
      - '**/*.h'
      - '**/*.hpp'
      - '**/*.m'
      - '**/*.mm'
      - '**/*.metal'
      - 'Package.swift'
      - 'Package.resolved'
      - '.github/workflows/release.yml'

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

permissions:
  contents: write

jobs:
  build-and-release:
    runs-on: macos-15

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0  # Full history for build number
          submodules: recursive

      - name: Install Metal Toolchain
        run: xcodebuild -downloadComponent MetalToolchain || true

      - name: Determine tag name
        id: tag
        run: |
          BUILD_NUMBER="$(git rev-list --count HEAD)"
          SHORT_HASH="$(git rev-parse --short=7 HEAD)"
          echo "name=b${BUILD_NUMBER}" >> $GITHUB_OUTPUT
          echo "full=b${BUILD_NUMBER}-${SHORT_HASH}" >> $GITHUB_OUTPUT
          echo "Build: b${BUILD_NUMBER} (${SHORT_HASH})"

      - name: Generate changelog
        id: changelog
        run: |
          # Find the previous release tag
          PREV_TAG=$(git tag --sort=-creatordate | head -1 2>/dev/null || echo "")
          if [ -z "$PREV_TAG" ]; then
            # First release — all commits
            CHANGELOG=$(git log --pretty=format:"- %s (%h)" --no-merges -20)
          else
            CHANGELOG=$(git log "${PREV_TAG}..HEAD" --pretty=format:"- %s (%h)" --no-merges)
          fi
          # Write to file (multi-line safe)
          echo "$CHANGELOG" > /tmp/changelog.txt
          echo "Generated changelog with $(echo "$CHANGELOG" | wc -l | tr -d ' ') entries"

      - name: Cache Swift packages
        uses: actions/cache@v4
        with:
          path: .build
          key: ${{ runner.os }}-spm-release-${{ hashFiles('Package.resolved') }}
          restore-keys: |
            ${{ runner.os }}-spm-release-

      - name: Build (Release)
        run: |
          swift package resolve
          swift build -c release

      - name: Install MLX Metal library
        run: |
          python3 -m venv /tmp/mlx_venv
          /tmp/mlx_venv/bin/pip install --quiet mlx
          MLX_LIB=$(find /tmp/mlx_venv -name "mlx.metallib" | head -n 1)
          cp "$MLX_LIB" .build/release/mlx.metallib

      - name: Verify binary
        run: |
          ls -lh .build/release/SwiftLM
          file .build/release/SwiftLM
          .build/release/SwiftLM --help || true

      - name: Package binary
        run: |
          mkdir -p release
          cp .build/release/SwiftLM release/
          cp .build/release/mlx.metallib release/
          cp LICENSE README.md release/
          cd release
          # Verify the tarball will be self-contained before archiving
          ls -lh
          tar -czvf ../SwiftLM-${{ steps.tag.outputs.name }}-macos-arm64.tar.gz .
          
      - name: Build macOS DMG Wrapper
        run: |
          cd SwiftBuddy && python3 generate_xcodeproj.py
          cd ..
          xcodebuild clean build \
            -project SwiftBuddy/SwiftBuddy.xcodeproj \
            -scheme SwiftBuddy \
            -destination "generic/platform=macOS" \
            -configuration Release \
            CODE_SIGN_IDENTITY="" \
            CODE_SIGNING_REQUIRED=NO \
            CODE_SIGN_ENTITLEMENTS="" \
            CODE_SIGNING_ALLOWED=NO \
            TARGET_BUILD_DIR="$RUNNER_TEMP/build" \
            BUILT_PRODUCTS_DIR="$RUNNER_TEMP/build"
          brew install create-dmg
          chmod +x scripts/build_dmg.sh
          ./scripts/build_dmg.sh "$RUNNER_TEMP/build/SwiftBuddy.app"

      - name: Upload artifact
        uses: actions/upload-artifact@v4
        with:
          name: SwiftLM-${{ steps.tag.outputs.name }}-macos-arm64
          path: SwiftLM-${{ steps.tag.outputs.name }}-macos-arm64.tar.gz
          retention-days: 90

      - name: Prepare release notes
        id: notes
        run: |
          CHANGELOG=$(cat /tmp/changelog.txt)
          cat > /tmp/release_notes.md << 'RELEASE_EOF'
          ## SwiftLM ${{ steps.tag.outputs.full }}

          <details open>

          ${{ github.event.head_commit.message }}

          </details>

          ### Changelog

          RELEASE_EOF
          cat /tmp/changelog.txt >> /tmp/release_notes.md
          cat >> /tmp/release_notes.md << 'RELEASE_EOF'

          ### Download

          - **CLI Server**: [macOS Apple Silicon (arm64)](https://github.com/SharpAI/SwiftLM/releases/download/${{ steps.tag.outputs.name }}/SwiftLM-${{ steps.tag.outputs.name }}-macos-arm64.tar.gz)
          - **GUI Desktop App**: Download the attached `SwiftBuddy-macOS.dmg` below!

          ### Quick Start
          
          **For GUI Users (SwiftBuddy)**:
          1. Download the attached DMG and open it.
          2. Drag `SwiftBuddy.app` into your Applications folder natively or run directly.
          3. When launched, click "Model Options" to select or download an MLX local model to chat with.

          **For CLI Users (SwiftLM)**:
          Please refer to the [Getting Started](https://github.com/SharpAI/SwiftLM#getting-started) section in the README.
          > **Note:** `mlx.metallib` is bundled in the tar archive. Keep it in the same directory as the `SwiftLM` binary — Metal GPU compute will fail if it is missing.
          RELEASE_EOF

      - name: Create release
        if: ${{ github.event_name == 'push' || github.event.inputs.create_release == 'true' }}
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.tag.outputs.name }}
          name: "SwiftLM ${{ steps.tag.outputs.name }}"
          body_path: /tmp/release_notes.md
          files: |
            SwiftLM-${{ steps.tag.outputs.name }}-macos-arm64.tar.gz
            output/*.dmg
          draft: false
          prerelease: false