update-mirror.yml

name: Update mirror

on:
  schedule:
    - cron: '0 */2 * * *'

jobs:
  update:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout this repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: upstream/master

      - name: Fetch updates from official repository
        run: |
          git config pull.ff only
          git remote add official git://git.kitenet.net/git-annex
          git pull --tags official master

      - name: Determine new tags
        run: |
          comm -23 <(git tag | sort) \
                   <(git ls-remote --tags --refs origin \
                    | awk '{print $2}' \
                    | xargs git for-each-ref --format '%(refname:strip=2)' \
                    | sort) > new-tags.txt

      - name: Push new objects to mirror
        run: git push --tags origin upstream/master

      - name: Check out master .github
        run: git checkout origin/master -- .github

      - name: Install Python
        uses: actions/setup-python@v5
        with:
          python-version: '^3.6'

      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip 'pip-run!=8.4' wheel
          # No quotes around substitution:
          python -m pip install $(python -m pip_run.read-deps .github/workflows/tools/dispatch-build)
          # Install the script's dependencies beforehand so that they aren't
          # installed separately for each & every invocation by xargs.

      - name: Trigger workflow runs for new tags
        run: |
          xargs -a new-tags.txt -r -L1 \
            python .github/workflows/tools/dispatch-build
        env:
          GITHUB_TOKEN: ${{ secrets.DATALAD_GITHUB_TOKEN }}

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