name: Perform checks

on:
  push:
  pull_request:
  workflow_dispatch:

jobs:
  formatting:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Install nix
        uses: DeterminateSystems/nix-installer-action@main
      - name: Restore and cache Nix store
        uses: nix-community/cache-nix-action@v5
        with:
          # restore and save a cache using this key
          primary-key: nix-${{ runner.os }}-${{ hashFiles('**/*.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
      - uses: DeterminateSystems/magic-nix-cache-action@main
      - name: Check Nix flake inputs
        uses: DeterminateSystems/flake-checker-action@v4 # This action
      - name: Run nix fmt
        run: nix fmt -- --check .

  nix_flake_check:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Install nix
        uses: DeterminateSystems/nix-installer-action@main
      - name: Restore and cache Nix store
        uses: nix-community/cache-nix-action@v5
        with:
          # restore and save a cache using this key
          primary-key: nix-${{ runner.os }}-${{ hashFiles('**/*.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
      - name: Check Nix flake inputs
        uses: DeterminateSystems/flake-checker-action@v4 # This action
      - name: Run nix flake check
        run: nix flake check

  nix_build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Install nix
        uses: DeterminateSystems/nix-installer-action@main
      - name: Check Nix flake inputs
        uses: DeterminateSystems/flake-checker-action@v4 # This action
      - name: Build nvim
        run: nix build .\#default