Add abstraction to use multiple toolchains

Signed-off-by: Marcel Müller <neikos@neikos.email>

lib/mk-dylint.nix

@@ -0,0 +1,40 @@
+{
+  pkgs,
+
+  cargo-dylint,
+
+  mkCargoDylintDriver,
+}:
+
+{ lints }:
+
+let
+  inherit (pkgs) lib;
+  driver_names = lib.groupBy (v: v.toolchain) lints;
+  driverMap = builtins.mapAttrs (
+    name: _:
+    mkCargoDylintDriver "nightly-${name}" (
+      pkgs.rust-bin.nightly."${name}".default.override {
+        extensions = [
+          "rustc-dev"
+        ];
+      }
+    )
+  ) driver_names;
+  drivers = pkgs.runCommandLocal "dylint-drivers" { } (
+    lib.strings.concatMapAttrsStringSep "\n" (name: driver: ''
+      mkdir -p $out/nightly-${name}
+      ln -s ${driver}/bin/dylint_driver-nix $out/nightly-${name}/dylint-driver
+    '') driverMap
+  );
+in
+pkgs.runCommandLocal "cargo-dylint-wrapped"
+  {
+    nativeBuildInputs = [ pkgs.makeWrapper ];
+    meta.mainProgram = "cargo-dylint";
+  }
+  ''
+    makeWrapper ${cargo-dylint}/bin/cargo-dylint $out/bin/cargo-dylint \
+      --set DYLINT_LIBRARY_PATH ${lib.strings.makeLibraryPath (builtins.map (v: v.package) lints)} \
+      --set DYLINT_DRIVER_PATH ${drivers};
+  ''