update-readme.yml

name: Update readme on master

on:
  push:
    branches:
      - 'master'

jobs:
  update-readme:
    runs-on: ubuntu-18.04
    name: "Update readme on master to latest release"
    outputs:
      updated: ${{ steps.has-changed.outputs.changed }}
    steps:
      - uses: actions/checkout@v2
        with:
          fetch-depth: 0
      - uses: actions/setup-java@v1
        with:
          java-version: 8
      - name: Cache Maven packages
        uses: actions/cache@v2
        with:
          path: |
            ~/.m2/repository
            !~/.m2/repository/fr/sii/
          key: ${{ runner.os }}-m2-${{ secrets.CACHE_VERSION }}-${{ hashFiles('**/pom.xml') }}
          restore-keys: ${{ runner.os }}-${{ secrets.CACHE_VERSION }}
      - name: "Get latest release"
        id: latest-release
        run: |
          LATEST_RELEASE="$(git tag -l | sort -Vr | head -n1)"
          LATEST_RELEASE="${LATEST_RELEASE#v}"
          echo "::set-output name=version::$LATEST_RELEASE"
      - name: "Generate README.adoc"
        run: 
          ./mvnw install 
              -DskipTests=true
              -Dmaven.javadoc.skip=true
              -Dreadme.skip=false
              -Ddoc.ogham.version=${{ steps.latest-release.outputs.version}}
              -Dgit.branch=master
      - name: "Has changed"
        id: has-changed
        run: |
          CHANGED=$((git status --porcelain | grep -q README.adoc) && echo 'true' || echo 'false')
          echo "CHANGED=$CHANGED"
          echo "::set-output name=changed::$CHANGED"
      - name: "Update README"
        run: |
          if [ "${{ steps.has-changed.outputs.changed }}" != "true" ]; then
            echo "README already up-to-date"
            exit 0
          fi
          echo "::warning ::Need to update README"
          git config user.email github-actions@github.com
          git config user.name github-actions
          git add .
          git commit -m "doc(readme) Update README to always show latest release version (${{ steps.latest-release.outputs.version}}) on master"
          git push

  slack-updated:
    if: success() && fromJson(needs.update-readme.outputs.updated)
    needs: [update-readme]
    runs-on: ubuntu-18.04
    name: "Slack"
    steps:
      - uses: 8398a7/action-slack@v3
        with:
          status: success
          fields: workflow,ref
          username: 'readme'
          author_name: ''
          icon_url: https://github.com/groupe-sii/ogham/raw/master/src/site/resources/img/ogham-blue-256x256.png
          text: |
            :x: readme has been updated on master
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
      
  slack-failure:
    if: failure()
    needs: [update-readme]
    runs-on: ubuntu-18.04
    name: "Slack"
    steps:
      - uses: 8398a7/action-slack@v3
        with:
          status: failure
          fields: workflow,ref
          username: 'readme'
          author_name: ''
          icon_url: https://github.com/groupe-sii/ogham/raw/master/src/site/resources/img/ogham-blue-256x256.png
          text: |
            :x: failed to update readme on master
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}