refactor: clean up scripts

Tidy up the script logic and deduplicate it a bit.

scripts/audiomenu/package.nix

@@ -1,31 +1,9 @@
-{ lib, rustPlatform }:
+{ lib, rustPlatform, cleanRustSrc }:
 let
   cargoToml = builtins.fromTOML (builtins.readFile ./Cargo.toml);
   inherit (cargoToml.package) name version description;
   pname = name;
-  src = lib.cleanSourceWith {
-    src = ./.;
-    name = "${pname}-source";
-    # Adapted from <https://github.com/ipetkov/crane/blob/master/lib/filterCargoSources.nix>
-    # no need to pull in crane for just this
-    filter =
-      orig_path: type:
-      let
-        path = toString orig_path;
-        base = baseNameOf path;
-        parentDir = baseNameOf (dirOf path);
-        matchesSuffix = lib.any (suffix: lib.hasSuffix suffix base) [
-          # Rust sources
-          ".rs"
-          # TOML files are often used to configure cargo based tools (e.g. .cargo/config.toml)
-          ".toml"
-        ];
-        isCargoLock = base == "Cargo.lock";
-        # .cargo/config.toml is captured above
-        isOldStyleCargoConfig = parentDir == ".cargo" && base == "config";
-      in
-      type == "directory" || matchesSuffix || isCargoLock || isOldStyleCargoConfig;
-  };
+  src = cleanRustSrc ./.;
 in
 rustPlatform.buildRustPackage {
   inherit pname version src;