name: Build and deploy examples to GitHub Pages

on:
  push:
    branches:
      - master

jobs:
  build-examples:
    runs-on: ubuntu-latest
    if: github.repository == 'Kotlin/dokka'
    strategy:
      matrix:
        projects: [
          dokka-gradle-example,
          dokka-kotlinAsJava-example,
          dokka-library-publishing-example,
          dokka-multiplatform-example,
          dokka-customFormat-example
        ]
    steps:
      - uses: actions/checkout@v3
      - uses: dorny/paths-filter@v2
        id: filter
        with:
          filters: |
            examples_changed:
              - 'examples/gradle/${{ matrix.projects }}/**'
      - uses: actions/setup-java@v3
        with:
          distribution: 'zulu'
          java-version: 11
          cache: 'maven'
      - uses: gradle/gradle-build-action@v2
      - name: Build html
        run: ./gradlew dokkaHtml --no-daemon --stacktrace
        working-directory: examples/gradle/${{ matrix.projects }}
        if: steps.filter.outputs.examples_changed == 'true'
      - name: Upload artifact
        uses: actions/upload-artifact@v2
        if: steps.filter.outputs.examples_changed == 'true'
        with:
          name: ${{ matrix.projects }}
          path: examples/gradle/${{ matrix.projects }}/build/dokka

  build-multimodule-examples:
    runs-on: ubuntu-latest
    if: github.repository == 'Kotlin/dokka'
    strategy:
      matrix:
        projects: [
          dokka-versioning-multimodule-example,
          dokka-multimodule-example
        ]
    steps:
      - uses: actions/checkout@v3
      - uses: dorny/paths-filter@v2
        id: filter
        with:
          filters: |
            examples_changed:
              - 'examples/gradle/${{ matrix.projects }}/**'
      - uses: actions/setup-java@v3
        with:
          distribution: 'zulu'
          java-version: 11
          cache: 'maven'
      - uses: gradle/gradle-build-action@v2
      - name: Build html
        run: ./gradlew dokkaHtmlMultiModule --no-daemon --stacktrace
        working-directory: examples/gradle/${{ matrix.projects }}
        if: steps.filter.outputs.examples_changed == 'true'
      - name: Upload artifact
        uses: actions/upload-artifact@v2
        if: steps.filter.outputs.examples_changed == 'true'
        with:
          name: ${{ matrix.projects }}
          path: examples/gradle/${{ matrix.projects }}/parentProject/build/dokka

  deploy-examples:
    runs-on: ubuntu-latest
    needs: [ build-examples, build-multimodule-examples ]
    steps:
      - uses: actions/download-artifact@v2
        with:
          path: public/examples
      - name: Deploy
        uses: peaceiris/actions-gh-pages@v3
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          keep_files: true
          publish_dir: ./public
          full_commit_message: Publish examples