GitHub Actions Mini Tutorial - Only Deploy Master

I thought id share a little info on how to have a conditional statement for your actions that ONLY executes if you are on master.

Firstly, only run on pushes to master, and PRs to master.

on:
  # Trigger the workflow on push or pull request for master only.
  push:
    branches:
      - master
  pull_request:
    branches:
      - master

Then finally, in any action:

    # Upload to S3
    - name: sync s3
      # Do not deploy anything other than master
      if: github.ref == 'refs/heads/master'    
      uses: jakejarvis/s3-sync-action@master
      with:
        args: --acl public-read --follow-symlinks --delete
      env:
        AWS_S3_BUCKET: ${{ secrets.AWS_S3_BUCKET }}
        AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
        AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
        AWS_REGION: 'us-east-1'
        SOURCE_DIR: 'dist'

The key above being: if: github.ref == 'refs/heads/master'

Personally I wish they would make the branch name an env variable to make this much cleaner but Actions are still new.

Happy deploying!