Add cargo module

home-manager/modules/cargo/default.nix

@@ -0,0 +1,27 @@
+{ pkgs, config, lib, ... }:
+with lib;
+let
+  cfg = config.eboskma.programs.cargo;
+
+  tomlFormat = pkgs.formats.toml { };
+
+  cargoConfig = types.submodule {
+    freeformType = tomlFormat.type;
+  };
+in
+{
+  options.eboskma.programs.cargo = {
+    enable = mkEnableOption "cargo";
+    settings = mkOption {
+      description = "Cargo configuration according to https://doc.rust-lang.org/cargo/reference/config.html";
+      default = { };
+      type = cargoConfig;
+    };
+  };
+
+  config = mkIf cfg.enable {
+    home.file.".cargo/config.toml" = {
+      source = tomlFormat.generate "cargo-config.toml" cfg.settings;
+    };
+  };
+}