feat: add buildkite pipeline

Author: johnae

.buildkite/pipeline.yml

@@ -0,0 +1,15 @@
+env:
+  CACHE_NAME: insane
+  
+steps:
+  - label: Set up cachix
+    commands:
+    - nix profile install nixpkgs#cachix
+    - cachix use "$CACHE_NAME"
+  - wait
+  - label: Nix lint
+    commands:
+    - nix run .#world -- lint
+  - label: Nix check
+    commands:
+    - nix run .#world -- check

flake/packages.nix

@@ -70,7 +70,7 @@
         in
           pkgs.writeShellApplication {
             name = "world";
-            runtimeInputs = with pkgs; [just nushell statix deadnix];
+            runtimeInputs = with pkgs; [just nushell statix deadnix cachix];
             text = ''
               just -f ${pkgs.replaceVars ../files/Justfile.template {
                 inherit upgrade build;