release.yml

name: Release

on:
  push:
    branches: [ main ]
  workflow_dispatch:

env:
  DOTNET_VERSION: '10.0.x'
  SOLUTION: MarkdownLd.Kb.slnx
  ARTIFACTS_DIR: ./artifacts

jobs:
  build:
    name: Build, test, and pack
    runs-on: ubuntu-latest
    timeout-minutes: 20
    permissions:
      contents: read

    outputs:
      version: ${{ steps.version.outputs.version }}

    steps:
    - name: Checkout
      uses: actions/checkout@v6
      with:
        submodules: true

    - name: Setup .NET
      uses: actions/setup-dotnet@v5
      with:
        dotnet-version: ${{ env.DOTNET_VERSION }}

    - name: Extract version from Directory.Build.props
      id: version
      shell: bash
      run: |
        set -euo pipefail
        VERSION="$(python3 - <<'PY'
        import xml.etree.ElementTree as ET

        root = ET.parse("Directory.Build.props").getroot()

        def read(name: str) -> str:
            for element in root.iter():
                if element.tag.endswith(name) and element.text and element.text.strip():
                    return element.text.strip()
            return ""

        print(read("PackageVersion") or read("Version"))
        PY
        )"

        if [ -z "${VERSION}" ]; then
          echo "::error::Could not read <PackageVersion>/<Version> from Directory.Build.props"
          exit 1
        fi

        echo "version=${VERSION}" >> "${GITHUB_OUTPUT}"
        echo "Version from Directory.Build.props: ${VERSION}"

    - name: Restore dependencies
      run: dotnet restore ${{ env.SOLUTION }}

    - name: Verify formatting
      run: dotnet format ${{ env.SOLUTION }} --verify-no-changes --no-restore

    - name: Build
      run: dotnet build ${{ env.SOLUTION }} --configuration Release --no-restore

    - name: Test
      run: dotnet test --solution ${{ env.SOLUTION }} --configuration Release --verbosity normal

    - name: Pack NuGet packages
      run: dotnet pack ${{ env.SOLUTION }} --configuration Release -p:IncludeSymbols=false -p:SymbolPackageFormat=snupkg --output ${{ env.ARTIFACTS_DIR }}

    - name: Upload artifacts
      uses: actions/upload-artifact@v7
      with:
        name: nuget-packages
        path: ${{ env.ARTIFACTS_DIR }}/*.nupkg
        retention-days: 5

  publish-nuget:
    name: Publish to NuGet
    needs: build
    runs-on: ubuntu-latest
    if: github.ref == 'refs/heads/main'
    permissions:
      contents: read

    outputs:
      published: ${{ steps.publish.outputs.published }}
      version: ${{ needs.build.outputs.version }}

    steps:
    - name: Download artifacts
      uses: actions/download-artifact@v8
      with:
        name: nuget-packages
        path: ${{ env.ARTIFACTS_DIR }}

    - name: Setup .NET
      uses: actions/setup-dotnet@v5
      with:
        dotnet-version: ${{ env.DOTNET_VERSION }}

    - name: Publish to NuGet
      id: publish
      shell: bash
      run: |
        set -euo pipefail

        PUBLISHED=false
        shopt -s nullglob

        for package in ${{ env.ARTIFACTS_DIR }}/*.nupkg; do
          echo "Publishing ${package}..."
          set +e
          RESULT="$(dotnet nuget push "${package}" \
            --api-key "${{ secrets.NUGET_API_KEY }}" \
            --source https://api.nuget.org/v3/index.json \
            --skip-duplicate 2>&1)"
          EXIT_CODE=$?
          set -e
          echo "${RESULT}"

          if [ ${EXIT_CODE} -eq 0 ]; then
            PUBLISHED=true
          elif echo "${RESULT}" | grep -qi "already exists"; then
            echo "Package already exists, skipping ${package}."
          else
            echo "::error::Failed to publish ${package}"
            exit ${EXIT_CODE}
          fi
        done

        echo "published=${PUBLISHED}" >> "${GITHUB_OUTPUT}"

  create-release:
    name: Create GitHub release and tag
    needs: publish-nuget
    runs-on: ubuntu-latest
    if: needs.publish-nuget.outputs.published == 'true'
    permissions:
      contents: write

    steps:
    - name: Checkout
      uses: actions/checkout@v6
      with:
        fetch-depth: 0
        token: ${{ secrets.GITHUB_TOKEN }}

    - name: Download artifacts
      uses: actions/download-artifact@v8
      with:
        name: nuget-packages
        path: ${{ env.ARTIFACTS_DIR }}

    - name: Create and push tag
      shell: bash
      run: |
        set -euo pipefail
        VERSION="${{ needs.publish-nuget.outputs.version }}"
        TAG="v${VERSION}"

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

        if git rev-parse "${TAG}" >/dev/null 2>&1; then
          echo "Tag ${TAG} already exists."
        else
          git tag -a "${TAG}" -m "Release ${VERSION}"
          git push origin "${TAG}"
        fi

    - name: Generate release notes
      shell: bash
      run: |
        set -euo pipefail
        VERSION="${{ needs.publish-nuget.outputs.version }}"
        TAG="v${VERSION}"
        PREVIOUS_TAG="$(git tag --sort=-version:refname | grep -v -x -- "${TAG}" | head -n1 || true)"

        {
          echo "# Release ${VERSION}"
          echo
          echo "Released on $(date +'%Y-%m-%d')"
          echo

          if [ -n "${PREVIOUS_TAG}" ]; then
            echo "## Changes since ${PREVIOUS_TAG}"
            echo
            git log --pretty=format:"- %s (%h)" "${PREVIOUS_TAG}..HEAD" || true
          else
            echo "## Initial release"
            echo
            git log --pretty=format:"- %s (%h)" --max-count=20 || true
          fi

          echo
          echo "## NuGet packages"
          echo
          shopt -s nullglob
          for package in ${{ env.ARTIFACTS_DIR }}/*.nupkg; do
            file="$(basename "${package}")"
            base="${file%.nupkg}"
            version_suffix=".${VERSION}"
            package_id="${base%"${version_suffix}"}"
            echo "- [${package_id} ${VERSION}](https://www.nuget.org/packages/${package_id}/${VERSION})"
          done
        } > release_notes.md

    - name: Create GitHub Release
      shell: bash
      run: |
        set -euo pipefail
        VERSION="${{ needs.publish-nuget.outputs.version }}"
        TAG="v${VERSION}"

        gh release create "${TAG}" \
          --title "${TAG}" \
          --notes-file release_notes.md \
          ${{ env.ARTIFACTS_DIR }}/*.nupkg
      env:
        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}