name: derive-branch-from-environment

on:
  schedule:
    # Weekly
    - cron: 0 0 * * 0

jobs:
  DoSomeUpdate:
    runs-on: ubuntu-latest
    steps:
    - name: Checkout Repository
      uses: actions/checkout@v1
    - name: Install or Do Something to Change repository
      run: |
         echo "This is a new file." >> newfile.txt

    - name: Checkout New Branch
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        BRANCH_AGAINST: "master"
      run: |
        printf "GitHub Actor: ${GITHUB_ACTOR}\n"
        export BRANCH_FROM="update/newfile-$(date '+%Y-%m-%d')"
        git remote set-url origin "https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git"
        git branch
        git checkout -b "${BRANCH_FROM}" || git checkout "${BRANCH_FROM}"
        git branch

        git config --global user.name "github-actions"
        git config --global user.email "github-actions@users.noreply.github.com"

        git add newfile.txt

        if git diff-index --quiet HEAD --; then
           printf "No changes\n"
        else
           printf "Changes\n"
           git commit -m "Automated deployment to update software database $(date '+%Y-%m-%d')"
           git push origin "${BRANCH_FROM}"
        fi
        # Here is where we are setting the environment variable!
        echo "PULL_REQUEST_FROM_BRANCH=${BRANCH_FROM}" >> $GITHUB_ENV

    - name: Open Pull Request
      uses: vsoch/pull-request-action@1.0.6
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        PULL_REQUEST_BRANCH: "master"