wrapper: add built package as option

modules/modules.nix

@@ -48,6 +48,7 @@
     # The neovim wrapper, used to build a wrapped neovim package
     # using the configuration passed in `neovim` and `plugins` modules.
     wrapper = map (p: ./wrapper + "/${p}") [
+      "build"
       "environment"
       "rc"
       "warnings"

modules/wrapper/build/config.nix

@@ -0,0 +1,111 @@
+{
+  inputs,
+  lib,
+  config,
+  pkgs,
+  ...
+}
+: let
+  inherit (pkgs) vimPlugins;
+  inherit (lib.strings) isString;
+  inherit (lib.lists) filter map;
+
+  # alias to the internal configuration
+  vimOptions = config.vim;
+
+  noBuildPlug = {pname, ...} @ attrs: let
+    src = inputs."plugin-${attrs.pname}";
+  in
+    {
+      version = src.shortRev or src.shortDirtyRev or "dirty";
+      outPath = src;
+      passthru.vimPlugin = false;
+    }
+    // attrs;
+
+  # build a vim plugin with the given name and arguments
+  # if the plugin is nvim-treesitter, warn the user to use buildTreesitterPlug
+  # instead
+  buildPlug = attrs: let
+    src = inputs."plugin-${attrs.pname}";
+  in
+    pkgs.vimUtils.buildVimPlugin (
+      {
+        version = src.shortRev or src.shortDirtyRev or "dirty";
+        inherit src;
+      }
+      // attrs
+    );
+
+  buildTreesitterPlug = grammars: vimPlugins.nvim-treesitter.withPlugins (_: grammars);
+
+  pluginBuilders = {
+    nvim-treesitter = buildTreesitterPlug vimOptions.treesitter.grammars;
+    flutter-tools-patched = buildPlug {
+      pname = "flutter-tools";
+      patches = [./patches/flutter-tools.patch];
+    };
+  };
+
+  buildConfigPlugins = plugins:
+    map (
+      plug:
+        if (isString plug)
+        then pluginBuilders.${plug} or (noBuildPlug {pname = plug;})
+        else plug
+    ) (filter (f: f != null) plugins);
+
+  # built (or "normalized") plugins that are modified
+  builtStartPlugins = buildConfigPlugins vimOptions.startPlugins;
+  builtOptPlugins = map (package: package // {optional = true;}) (buildConfigPlugins vimOptions.optPlugins);
+
+  # additional Lua and Python3 packages, mapped to their respective functions
+  # to conform to the format mnw expects. end user should
+  # only ever need to pass a list of packages, which are modified
+  # here
+  extraLuaPackages = ps: map (x: ps.${x}) vimOptions.luaPackages;
+  extraPython3Packages = ps: map (x: ps.${x}) vimOptions.python3Packages;
+
+  # Wrap the user's desired (unwrapped) Neovim package with arguments that'll be used to
+  # generate a wrapped Neovim package.
+  neovim-wrapped = inputs.mnw.lib.wrap pkgs {
+    neovim = vimOptions.package;
+    plugins = builtStartPlugins ++ builtOptPlugins;
+    appName = "nvf";
+    extraBinPath = vimOptions.extraPackages;
+    initLua = vimOptions.builtLuaConfigRC;
+    luaFiles = vimOptions.extraLuaFiles;
+
+    inherit (vimOptions) viAlias vimAlias withRuby withNodeJs withPython3;
+    inherit extraLuaPackages extraPython3Packages;
+  };
+
+  dummyInit = pkgs.writeText "nvf-init.lua" vimOptions.builtLuaConfigRC;
+  # Additional helper scripts for printing and displaying nvf configuration
+  # in your commandline.
+  printConfig = pkgs.writers.writeDashBin "nvf-print-config" "cat ${dummyInit}";
+  printConfigPath = pkgs.writers.writeDashBin "nvf-print-config-path" "echo -n ${dummyInit}";
+
+  # Expose wrapped neovim-package for userspace
+  # or module consumption.
+  neovim = pkgs.symlinkJoin {
+    name = "nvf-with-helpers";
+    paths = [neovim-wrapped printConfig printConfigPath];
+    postBuild = "echo Helpers added";
+
+    # Allow evaluating vimOptions, i.e., config.vim from the packages' passthru
+    # attribute. For example, packages.x86_64-linux.neovim.passthru.neovimConfig
+    # will return the configuration in full.
+    passthru.neovimConfig = vimOptions;
+
+    meta =
+      neovim-wrapped.meta
+      // {
+        description = "Wrapped Neovim package with helper scripts to print the config (path)";
+      };
+  };
+in {
+  config.vim.build = {
+    finalPackage = neovim;
+  };
+}

modules/wrapper/build/default.nix

@@ -0,0 +1,6 @@
+{
+  imports = [
+    ./options.nix
+    ./config.nix
+  ];
+}

modules/wrapper/build/options.nix

@@ -0,0 +1,12 @@
+{lib, ...}: let
+  inherit (lib.types) package;
+  inherit (lib.options) mkOption;
+in {
+  options.vim.build = {
+    finalPackage = mkOption {
+      type = package;
+      readOnly = true;
+      description = "final output package";
+    };
+  };
+}