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path: root/.github/workflows/update-lock.yaml
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name: Update flake.lock

on:
  schedule:
    # run every saturday
    - cron: "0 0 * * 6"
  workflow_dispatch:

jobs:
  update:
    name: Update
    runs-on: ubuntu-latest

    permissions:
      contents: write
      pull-requests: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1

      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@cd46bde16ab981b0a7b2dce0574509104543276e # v9

      - name: Create new branch
        id: branch
        run: |
          branch="update-flake-lock"

          echo "branch=$branch" >> "$GITHUB_OUTPUT"
          git switch -c "$branch"

      - name: Update flake inputs
        run: |
            nix flake update \
              --commit-lock-file \
              --commit-lockfile-summary "chore: update flake inputs"

      - name: Update test flake inputs
        run: |
          pushd ./test

          nix flake update \
            --commit-lock-file \
            --commit-lockfile-summary "chore: update test flake inputs"

          popd

      - name: Make PR if needed
        env:
          GH_TOKEN: ${{ github.token }}
          BRANCH: ${{ steps.branch.outputs.branch }}
        run: |
          if ! git diff --color=always --exit-code origin/main; then
            git push -u origin "$BRANCH"

            gh pr create \
              --base main \
              --head "$BRANCH" \
              --title "chore: update flake inputs" \
              --fill
          fi