name: Release gem

on:
  push:
    tags:
    - '*'

jobs:
  build:

    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v2

    - name: Set up JDK 1.8
      uses: actions/setup-java@v1
      with:
        java-version: 1.8
    - name: Grant execute permission for gradlew
      run: chmod +x gradlew
    - name: Build jar and gem with Gradle
      run: ./gradlew gem

    - name: Set up Ruby 2.6
      uses: actions/setup-ruby@v1
      with:
        ruby-version: 2.6.x
    - name: Release gem
      env:
        RUBYGEMS_API_KEY: ${{ secrets.RUBYGEMS_API_KEY }}
      run: |
        mkdir -p $HOME/.gem
        touch $HOME/.gem/credentials
        chmod 0600 $HOME/.gem/credentials
        printf -- "---\n:rubygems_api_key: ${RUBYGEMS_API_KEY}\n" > $HOME/.gem/credentials
        gem push pkg/*.gem