auto-sync-upstream.yaml

# Automatically fetch and merge upstream master branch and tags

name: Scheduled Sync Upstream Action
on:
  schedule:
    # scheduled every 6 hours
    - cron: '0 */6 * * *'
  
  workflow_dispatch: # on button click
    inputs:
      upstream:
        description: 'Upstream repository (eg. linuxmint/cinnamon)'
        required: true
        default: 'linuxmint/timeshift'       # set the upstream repo
      upstream-branch:
        description: 'Upstream branch to merge from. Eg. master'
        required: true
        default: 'master'           # set the upstream branch to merge from
      branch:
        description: 'Branch to merge to'
        required: true
        default: 'master'         # set the branch to merge to

jobs:
  # This workflow contains a single job called "sync-upstream"
  sync-upstream:
    runs-on: ubuntu-latest
    steps:
      # Set default branches when run as scheduled job
      - name: Set the branches
        env:
          DEFAULT_UPSTREAM: 'linuxmint/timeshift'      # set the upstream repo
          DEFAULT_UPSTREAM_BRANCH: 'master'           # set the upstream branch to merge from
          DEFAULT_BRANCH: 'master'                    # set the branch to merge to
        run: |
          echo "upstream=${{ github.event.inputs.upstream || env.DEFAULT_UPSTREAM }}" >> $GITHUB_ENV
          echo "upstream-branch=${{ github.event.inputs.upstream-branch || env.DEFAULT_UPSTREAM_BRANCH }}" >> $GITHUB_ENV
          echo "branch=${{ github.event.inputs.branch || env.DEFAULT_BRANCH }}" >> $GITHUB_ENV
      
      - name: Checkout
        uses: actions/checkout@v3
        with:
          ref: ${{ env.branch }}             # set the branch to merge to
          # Number of commits to fetch. 0 indicates all history for all branches and tags.
          fetch-depth: 0
      
      - name: Fetch and Merge Upstream Branch
        uses: exions/merge-upstream@v1
        with:
          upstream: ${{ env.upstream }}
          upstream-branch: ${{ env.upstream-branch }}
          branch: ${{ env.branch }}
          token: ${{ secrets.TOKEN }}
      
      - name: Push All Tags
        run: |
          git push origin --tags