.github/workflows/daily_pipeline.yaml

# This workflow will install Python dependencies, run tests and lint with a single version of Python
# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

name: Daily pipeline 

on:
  workflow_dispatch: {}
  schedule:
    # * is a special character in YAML so you have to quote this string
    # Feel free to change this cron schedule
    # Currently its scheduled for 1:25 pm UTC, Sun-Thurs
    - cron:  '25 13 * * 0-4'

jobs:
  generate_and_send_digest:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - name: Set up Python 3.8
      uses: actions/setup-python@v2
      with:
        python-version: 3.8
    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        pip install -r requirements.txt
    - name: Generate Digest 
      run: |
        python src/action.py
      env:
        OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
        SENDGRID_API_KEY: ${{ secrets.SENDGRID_API_KEY }}
        FROM_EMAIL: ${{ secrets.FROM_EMAIL }}
        TO_EMAIL: ${{ secrets.TO_EMAIL }}
    - name: Upload Artifact
      uses: actions/upload-artifact@v3
      with:
        name: digest.html
        path: digest.html
    - name: check
      id: check
      env:
        SENDGRID_API_KEY: ${{ secrets.SENDGRID_API_KEY }}
        MAIL_USERNAME: ${{ secrets.MAIL_USERNAME }}
        MAIL_PASSWORD: ${{ secrets.MAIL_PASSWORD }}
        MAIL_CONNECTION: ${{ secrets.MAIL_CONNECTION }}
      if: "${{ env.SENDGRID_API_KEY == '' && (env.MAIL_CONNECTION || env.MAIL_USERNAME != '' && env.MAIL_PASSWORD != '') }}"
      run: echo "DEFINED=true" >> $GITHUB_OUTPUT 
    - name: Send mail
      uses: dawidd6/action-send-mail@v3
      env:
        DEFINED: ${{ steps.check.outputs.DEFINED }}
      if: ${{ env.DEFINED == 'true' }}
      with:
        # Specify connection via URL (replaces server_address, server_port, secure,
        # username and password)
        #
        # Format:
        #
        #  * smtp://user:password@server:port
        #  * smtp+starttls://user:password@server:port
        connection_url: ${{secrets.MAIL_CONNECTION}}
        # Required mail server address if not connection_url:
        server_address: smtp.gmail.com
        # Server port, default 25:
        server_port: 465
        username: ${{secrets.MAIL_USERNAME}}
        password: ${{secrets.MAIL_PASSWORD}}
        secure: true
        subject: Personalized arXiv Digest 
        to: ${{ secrets.TO_EMAIL }} 
        from: "Personalized arxiv digest" 
        html_body: file://digest.html
        ignore_cert: true
        convert_markdown: true
        priority: normal