on:
  workflow_dispatch:

  schedule:
    - cron: '@hourly'

jobs:
  mirror:
    name: Pull from upstream
    runs-on: x86_64
    container:
      image: alpine:latest
    env:
      upstream: https://github.com/signalapp/Signal-Desktop
      tags: 'v7*'
    steps:
      - name: Environment setup
        run: apk add grep git sed coreutils bash nodejs
      - name: Fetch destination
        uses: actions/checkout@v4
        with:
          fetch_depth: 1
          ref: ci
          token: ${{ secrets.CODE_FORGEJO_TOKEN }}
      - name: Missing tag detecting
        run: |
          git ls-remote $upstream "refs/tags/$tags" | grep -v '{' | sed 's|.*/||' > upstream_tags
          git ls-remote ${{ github.server_url}}/${{ github.repository }} "refs/tags/$tags" | grep -v '{' | sed 's|.*/||' > destination_tags
          cat upstream_tags destination_tags | tr ' ' '\n' | sort | uniq -u > missing_tags
          echo "Missing tags:"
          cat missing_tags
      - name: Missing tag fetch
        run: |
          git remote add upstream $upstream
          while read tag; do
            git fetch upstream tag $tag --no-tags
          done < missing_tags
      - name: Packaging workflow injection
        run: |
          while read tag; do
            git checkout $tag
            git tag -d $tag
            git checkout ci -- ./.forgejo
            git config user.name "forgejo-actions[bot]"
            git config user.email "dev@ayakael.net"
            git commit -m 'Inject custom workflow'
            git tag -a $tag -m $tag
          done < missing_tags
      - name: Push to destination
        run: | # use http 1.1 due to http 2 stream not closing cleanly
          git config --global http.version HTTP/1.1
          git push --force origin refs/tags/*:refs/tags/* --tags