validate.yml

# This is a basic workflow to help you get started with Actions

name: validate

# Controls when the action will run. 
on:
  # Triggers the workflow on push or pull request events but only for the master branch
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  # This workflow contains a single job called "build"
  build:
    # The type of runner that the job will run on
    runs-on: ubuntu-latest

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      - name: Setup Python
        uses: actions/setup-python@v2.2.1
        with:
          # Semantic version range syntax or exact version of a Python version
          python-version: '2.7'
      - run: pip install jsonschema
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
      - uses: actions/checkout@v2

      # Runs a single command using the runners shell
      - name: Run validator
        run: python $GITHUB_WORKSPACE/validate.py -f
        
      # Push changes 
      - name: Push changes
        uses: gr2m/create-or-update-pull-request-action@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          title: "Formatting JSON"
          body: "JSON formatted with validate.py"
          commit-message: "JSON formatted with validate.py"