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path: root/.github/workflows/backport.yml
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name: Backport
on:
  pull_request_target:
    types: [closed, labeled]

# WARNING:
# When extending this action, be aware that $GITHUB_TOKEN allows write access to
# the GitHub repository. This means that it should not evaluate user input in a
# way that allows code injection.

permissions:
  contents: read

jobs:
  backport:
    permissions:
      contents: write # for korthout/backport-action to create branch
      pull-requests: write # for korthout/backport-action to create PR to backport
    name: Backport Pull Request
    if: github.repository_owner == 'NixOS' && github.event.pull_request.merged == true && (github.event_name != 'labeled' || startsWith('backport', github.event.label.name))
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
        with:
          ref: ${{ github.event.pull_request.head.sha }}
      - name: Create backport PRs
        uses: korthout/backport-action@ef20d86abccbac3ee3a73cb2efbdc06344c390e5 # v2.5.0
        with:
          # Config README: https://github.com/korthout/backport-action#backport-action
          copy_labels_pattern: 'severity:\ssecurity'
          pull_description: |-
            Bot-based backport to `${target_branch}`, triggered by a label in #${pull_number}.

            * [ ] Before merging, ensure that this backport is [acceptable for the release](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md#changes-acceptable-for-releases).
              * Even as a non-commiter, if you find that it is not acceptable, leave a comment.