on:
  workflow_dispatch:
    inputs:
      tags:
        description: 'tag list'
        type: string
        required: false
        default: ''
  schedule:
    - cron: '2 */12 * * *'

jobs:
  synchronize-upstream:
    runs-on: ubuntu-latest
    steps:
      - run: gh repo clone discretizer/homepage
      - name: Fetch Upstream Tags
        id: fetch-upstream-tags
        if:  ${{ !inputs.tags }}
        run: |
          git fetch --tags
          fmt='
            r=%(refname)
            echo ${r#refs/tags/}
          '
          echo 'NEW_TAGS<<EOF' >> $GITHUB_OUTPUT      
          $(eval `git for-each-ref --format=$fmt --no-merge upstream refs/tags`) >> $GITHUB_OUTPUT
          echo 'EOF' >> $GITHUB_OUTPUT
        working-directory: homepage
      - name: Set Identity
        run: | 
          git config user.name "Github Action"
          git config user.email "bot@github-actions"
        working-directory: homepage
      - name: Bump Current
        run: | 
          git checkout upstream 
          git merge upstream/main upstream
        working-directory: homepage
      - name: Create Tags
        if: ${{inputs.tags || steps.fetch-upstream-tags.outputs.NEW_TAGS}}
        run: | 
          for TAG in ${NEW_TAGS}; do 
            git checkout -b release/${TAG} ${TAG}
            git rev-list --no-merges --reverse origin/feature/add_auth ^upstream | git cherry-pick --stdin
            git rev-list --no-merges --reverse origin/fork/automation ^upstream -- .github/**| git cherry-pick --stdin
            git tag -d ${TAG} release/${TAG}
          done
          for TAG in ${NEW_TAGS}; do git push -u origin release/${TAG} ${TAG}; done 
        working-directory: homepage
        env: 
          NEW_TAGS: ${{inputs.tags || steps.fetch-upstream-tags.outputs.NEW_TAGS}}
      - name: Push Current
        working-directory: homepage
        run: |
          git checkout -b current upstream
          git rev-list --no-merges --reverse origin/feature/add_auth ^upstream | git cherry-pick --stdin
          git rev-list --no-merges --reverse origin/fork/automation ^upstream -- .github/**| git cherry-pick --stdin
          git push upstream current
    env:
      GH_TOKEN: ${{ github.token }}