name: Generate Client

# Runs this action whenever there are any changes to the master branch.
on:
  push:
    branches:
      - master

jobs:
  client:
    runs-on: ubuntu-latest

    # Checks out the entire repo.
    steps:
    - name: Checks out repo
      uses: actions/checkout@v1

    # Generates a openapi.yaml file based on the FastAPI project.
    - name: Generate OpenAPI file
      uses: column-st/fastapi-openapi-specs-action@v1.0.2
      with:
        moduleDir: collector
        fileName: main.py
        appName: app
        fastapiVersioning: v1

    # Uses an external tool, openapitools-generator-action, to generate the client code.
    # The 'openapirc.json' file is the following: { "packageName": "collector", "projectName": "collector" }
    # and it lives inside the master branch of the repository. Command outputs a new folder called 
    # 'python-client' with the relevant client code.
    - name: Generate Python Client
      uses: triaxtec/openapitools-generator-action@v1.0.0
      with:
        generator: python
        openapi-file: openapi.yaml
        config-file: openapirc.json

    # Deletes every file in the folder, except '.git' and the new generated 'python-client' folder.
    # Moves all content of the 'python-client' folder to the root directory.
    - name: Cleans the branch up.
      run: |
        # Removes all files except the .git and python-client folder.
        shopt -s extglob
        sudo rm -rf !(.|..|.git|python-client)
        # Moves all of the content of the python-client folder out, 
        # and deletes the folder.
        mv python-client/* .
        rm -rf python-client

    # Commits the new changes into a new branch called 'client'.
    - name: Commit changes.
      run: |
        git checkout -b client
        git config --local user.email "action@github.com"
        git config --local user.name "GitHub Action"
        git add .
        git commit -m "Generated client." -a || true 

    # Pushes all of these changes into the GitHub repository.
    - name: Push changes to client branch
      uses: ad-m/github-push-action@master
      with:
        github_token: ${{ secrets.GITHUB_TOKEN }}
        branch: client
        force: True