name: Fix Nix hash

on:
  push:
    branches: [main]
    paths:
      - 'package.json'
      - 'package-lock.json'
  pull_request:
    paths:
      - 'package.json'
      - 'package-lock.json'

permissions:
  contents: write

jobs:
  fix-nix-hash:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.head_ref || github.ref }}
          token: ${{ secrets.GITHUB_TOKEN }}

      - uses: actions/setup-node@v4
        with:
          node-version: '22'
          cache: 'npm'

      - uses: cachix/install-nix-action@v31
        with:
          nix_path: nixpkgs=channel:nixos-unstable

      - name: Fix lockfile and update hash
        run: ./scripts/update-nix.sh

      - name: Commit changes
        run: |
          git diff --quiet package-lock.json nix/package.nix && exit 0
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add package-lock.json nix/package.nix
          git commit -m "fix: update lockfile signatures and Nix hash"
          git push