From 41e81a16f16fdc375c62cc212be2548ac50e04fc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nikodem=20Rabuli=C5=84ski?= <nikodem@rabulinski.com>
Date: Tue, 1 Apr 2025 19:13:17 +0200
Subject: [PATCH] nilla: add ci.check

---
 .forgejo/workflows/build.yaml |  2 +-
 default.nix                   |  8 ++++++++
 nilla.nix                     | 36 +++++++++++++++++++++++++++++++++++
 3 files changed, 45 insertions(+), 1 deletion(-)
 create mode 100644 default.nix

diff --git a/.forgejo/workflows/build.yaml b/.forgejo/workflows/build.yaml
index 89693ab..ee97846 100644
--- a/.forgejo/workflows/build.yaml
+++ b/.forgejo/workflows/build.yaml
@@ -8,4 +8,4 @@ jobs:
     runs-on: native
     steps:
       - uses: actions/checkout@v4
-      - run: nix flake check --all-systems
+      - run: nix-build -A ci.check
diff --git a/default.nix b/default.nix
new file mode 100644
index 0000000..bb13b3b
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,8 @@
+let
+  nilla = import ./nilla.nix { };
+  getPackage = name: nilla.packages.${name}.result.${builtins.currentSystem};
+in
+{
+  ci.check = getPackage "ci-check";
+  formatter = getPackage "formatter";
+}
diff --git a/nilla.nix b/nilla.nix
index bc20103..4379f29 100644
--- a/nilla.nix
+++ b/nilla.nix
@@ -76,6 +76,42 @@
             in
             eval.config.build.wrapper;
         };
+        ci-check =
+          let
+            all-packages = builtins.attrValues (builtins.removeAttrs config.packages [ "ci-check" ]);
+            all-packages' = lib.lists.flatten (map (pkg: builtins.attrValues pkg.result) all-packages);
+
+            nixos-systems = builtins.attrValues config.systems.nixos;
+            nixos-systems' = map (system: system.result.config.system.build.toplevel) nixos-systems;
+
+            darwin-systems = builtins.attrValues config.systems.darwin;
+            darwin-systems' = map (system: system.result.config.system.build.toplevel) darwin-systems;
+
+            all-drvs = all-packages' ++ nixos-systems' ++ darwin-systems';
+            all-drvs' = lib.strings.concatMapSep "\n" builtins.unsafeDiscardStringContext all-drvs;
+          in
+          mkPackage (
+            {
+              lib,
+              stdenvNoCC,
+              system,
+            }:
+            stdenvNoCC.mkDerivation {
+              name = "nilla-eval-check";
+              src = lib.cleanSource ./.;
+              doCheck = true;
+
+              allDerivations = all-drvs';
+              formatter = lib.getExe config.packages.formatter.result.${system};
+
+              passAsFile = [ "allDerivations" ];
+
+              installPhase = ''touch "$out"'';
+              checkPhase = ''
+                "$formatter" --ci
+              '';
+            }
+          );
       };
 
     config.shells.default = {