feat: lurching towards relative usability

shells/nix.nix

@@ -0,0 +1,9 @@
+{pkgs, ...}:
+with pkgs;
+  mkShell {
+    nativeBuildInputs = [
+      deadnix # dead-code scanner
+      alejandra # code formatter
+      statix # anti-pattern finder
+    ];
+  }

shells/repo.nix

@@ -0,0 +1,15 @@
+{pkgs, inputs, system, ...}: with pkgs; let
+  repo = import ../outputs.nix (inputs // { inherit inputs system; });
+  inherit (lib.attrsets) mapAttrsToList;
+in
+  mkShell {
+    nativeBuildInputs = [
+      deadnix # dead-code scanner
+      alejandra # code formatter
+      statix # anti-pattern finder
+    ] ++ mapAttrsToList (name: _:
+      (pkgs.writeShellScriptBin "${name}-rebuild" ''
+        darwin-rebuild switch --flake ${toString ../.}#${name}
+      ''))
+    repo.darwinConfigurations;
+  }

shells/rust.nix

@@ -0,0 +1,12 @@
+{pkgs, ...}:
+with pkgs;
+  mkShell {
+    nativeBuildInputs = [
+      cargo
+      rustc
+      rustfmt
+      rustPackages.clippy
+      rust-analyzer
+    ];
+    RUST_SRC_PATH = rustPlatform.rustLibSrc;
+  }