nix.yml

name: "flake check"
on:
  pull_request:
  push:
jobs:
  flake-check:
    runs-on: ubuntu-latest
    permissions:
      actions: write
    steps:
      - uses: actions/checkout@v4
      - uses: nixbuild/nix-quick-install-action@v29
      - uses: nix-community/cache-nix-action@v5
        with:
          primary-key: nix-${{ runner.os }}-${{ hashFiles('flake.nix', 'flake.lock', 'pkgs/*.nix') }}
          # if there's no cache hit, restore a cache by this prefix
          restore-prefixes-first-match: nix-${{ runner.os }}-
          # collect garbage until Nix store size (in bytes) is at most this number
          # before trying to save a new cache
          gc-max-store-size-linux: 1073741824
          # do purge caches
          purge: true
          # purge all versions of the cache
          purge-prefixes: cache-${{ runner.os }}-
          # created more than this number of seconds ago relative to the start of the `Post Restore` phase
          purge-created: 0
          # except the version with the `primary-key`, if it exists
          purge-primary-key: never
      - run: nix --extra-experimental-features "pipe-operators" flake check