feat(wrapping): introduce wrapped configurations

overlays/derivations/nu/cfg/config.nu

@@ -0,0 +1,22 @@
+# config.nu
+#
+# Installed by:
+# version = "0.101.0"
+#
+# This file is used to override default Nushell settings, define
+# (or import) custom commands, or run any other startup tasks.
+# See https://www.nushell.sh/book/configuration.html
+#
+# This file is loaded after env.nu and before login.nu
+#
+# You can open this file in your default editor using:
+# config nu
+#
+# See `help config nu` for more options
+#
+# You can remove these comments if you want or leave
+# them for future reference.
+
+mkdir ($nu.data-dir | path join "vendor/autoload")
+starship init nu | save -f ($nu.data-dir | path join "vendor/autoload/starship.nu")
+zoxide init nushell | save -f ($nu.data-dir | path join "vendor/autoload/zoxide.nu")

overlays/derivations/nu/cfg/env.nu

@@ -0,0 +1,18 @@
+# env.nu
+#
+# Installed by:
+# version = "0.101.0"
+#
+# Previously, environment variables were typically configured in `env.nu`.
+# In general, most configuration can and should be performed in `config.nu`
+# or one of the autoload directories.
+#
+# This file is generated for backwards compatibility for now.
+# It is loaded before config.nu and login.nu
+#
+# See https://www.nushell.sh/book/configuration.html
+#
+# Also see `help config env` for more options.
+#
+# You can remove these comments if you want or leave
+# them for future reference.

overlays/derivations/nu/default.nix

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+{
+  symlinkJoin,
+  nushell,
+  amadaluzian-starship,
+  zoxide,
+  makeWrapper,
+}:
+symlinkJoin {
+  name = "nu";
+
+  paths = [
+    nushell
+    amadaluzian-starship
+    zoxide
+  ];
+
+  nativeBuildInputs = [
+    makeWrapper
+  ];
+
+  passthru = {
+    inherit (nushell.passthru) shellPath;
+  };
+
+  meta = {
+    inherit (nushell.meta) mainProgram;
+  };
+
+  postBuild = ''
+    wrapProgram $out/bin/nu \
+      --set NU_CONFIG_DIR "${./cfg}" \
+      --add-flags '--env-config' \
+      --add-flags '$NU_CONFIG_DIR/env.nu' \
+      --add-flags '--config' \
+      --add-flags '$NU_CONFIG_DIR/config.nu' \
+  '';
+}