GitHub Action Workflow for updating gems after dependabot push

update-gems.yml

name: Update Gems After Dependabot

on:
  push:
    branches:
      - 'dependabot/bundler/**'
    paths:
      - 'Gemfile.lock'

jobs:
  update-gems:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2
      - name: Set up Ruby 2.5
        uses: ruby/setup-ruby@v1
        with:
          ruby-version: 2.5.5
      - name: Installing additional dependencies
        run: |
          sudo apt-get install postgresql-client libpq-dev
      - name: Bundle install
        run: |
          gem install bundler --no-rdoc --no-ri
          bundle install
      - name: Commit
        run: |
          git config --local user.email `git show -s --format='%ae'`
          git config --local user.name ${GITHUB_ACTOR}
          git remote add github "https://$GITHUB_ACTOR:$GITHUB_TOKEN@github.com/$GITHUB_REPOSITORY.git"
          git add .
          git commit -m "`git log --oneline --format=%B -n 1 HEAD | head -n 1` - add gems"
          git push github HEAD:${GITHUB_REF}