1 files changed, 19 insertions, 1 deletions
diff --git a/shell.nix b/shell.nix
index c70c2eb..7e73840 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,11 +1,29 @@
-{ pkgs ? import (import ./nix/sources.nix).nixpkgs { } }:
+{ pkgs ? import (import ./nix/sources.nix).nixpkgs {
+    overlays = [
+      (self: super: {
+        "format" = pkgs.writers.writeDashBin "format" ''
+          set -efu
+          cd ${self.lib.escapeShellArg (toString ./.)}
+          find src -iname '*.rs' -exec ${pkgs.rustfmt}/bin/rustfmt '{}' \;
+        '';
+        "watch" = pkgs.writers.writeDashBin "watch" ''
+          set -efu
+          cd ${self.lib.escapeShellArg (toString ./.)}
+          find src -iname '*.rs' | entr -rs 'clear; cargo check'
+        '';
+      })
+    ];
+  }
+}:
 let inherit (pkgs) lib; in
 pkgs.mkShell rec {
   nativeBuildInputs = [
     pkgs.cargo
+    pkgs.format
     pkgs.pkg-config
     pkgs.rustc
     pkgs.rustfmt
+    pkgs.watch
   ];
   buildInputs = [
     pkgs.alsa-lib