name: Publish Gem

on:
  push:
    tags:
      - v[0-9]*.[0-9]*.[0-9]*

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Publish to RubyGems
        run: |
          mkdir -p $HOME/.gem
          touch $HOME/.gem/credentials
          chmod 0600 $HOME/.gem/credentials
          printf -- "---\n:rubygems_api_key: ${RUBYGEMS_API_KEY}\n" > $HOME/.gem/credentials
          gem build *.gemspec
          gem push *.gem
        env:
          RUBYGEMS_API_KEY: "${{secrets.RUBYGEMS_API_KEY}}"