tjh.dev
1# WARNING:
2# When extending this action, be aware that $GITHUB_TOKEN allows write access to
3# the GitHub repository. This means that it should not evaluate user input in a
4# way that allows code injection.
5
6name: Backport
7
8on:
9 pull_request_target:
10 types: [closed, labeled]
11
12permissions:
13 contents: read
14 pull-requests: write
15
16jobs:
17 backport:
18 name: Backport Pull Request
19 if: vars.NIXPKGS_CI_APP_ID && github.event.pull_request.merged == true && (github.event.action != 'labeled' || startsWith(github.event.label.name, 'backport'))
20 runs-on: ubuntu-24.04-arm
21 steps:
22 # Use a GitHub App to create the PR so that CI gets triggered
23 # The App is scoped to Repository > Contents and Pull Requests: write for Nixpkgs
24 - uses: actions/create-github-app-token@df432ceedc7162793a195dd1713ff69aefc7379e # v2.0.6
25 id: app-token
26 with:
27 app-id: ${{ vars.NIXPKGS_CI_APP_ID }}
28 private-key: ${{ secrets.NIXPKGS_CI_APP_PRIVATE_KEY }}
29 permission-contents: write
30 permission-pull-requests: write
31
32 - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
33 with:
34 ref: ${{ github.event.pull_request.head.sha }}
35 token: ${{ steps.app-token.outputs.token }}
36
37 - name: Create backport PRs
38 id: backport
39 uses: korthout/backport-action@436145e922f9561fc5ea157ff406f21af2d6b363 # v3.2.0
40 with:
41 # Config README: https://github.com/korthout/backport-action#backport-action
42 copy_labels_pattern: 'severity:\ssecurity'
43 github_token: ${{ steps.app-token.outputs.token }}
44 pull_description: |-
45 Bot-based backport to `${target_branch}`, triggered by a label in #${pull_number}.
46
47 * [ ] Before merging, ensure that this backport is [acceptable for the release](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md#changes-acceptable-for-releases).
48 * Even as a non-committer, if you find that it is not acceptable, leave a comment.
49
50 - name: "Add 'has: port to stable' label"
51 if: steps.backport.outputs.created_pull_numbers != ''
52 env:
53 # Not the app on purpose to avoid triggering another workflow run after adding this label
54 GH_TOKEN: ${{ github.token }}
55 REPOSITORY: ${{ github.repository }}
56 NUMBER: ${{ github.event.number }}
57 run: |
58 gh api \
59 --method POST \
60 /repos/"$REPOSITORY"/issues/"$NUMBER"/labels \
61 -f "labels[]=8.has: port to stable"