name: "No channel PR"

on:
  pull_request_target:
    # Re-run should be triggered when the base branch is updated, instead of silently failing
    types: [opened, synchronize, reopened, edited]
    branches:
      - 'nixos-**'
      - 'nixpkgs-**'

permissions: {}

jobs:
  fail:
    name: "This PR is is targeting a channel branch"
    runs-on: ubuntu-24.04
    steps:
      - run: |
          cat <<EOF
          The nixos-* and nixpkgs-* branches are pushed to by the channel
          release script and should not be merged into directly.

          Please target the equivalent release-* branch or master instead.
          EOF
          exit 1