modules: add helper scripts (#346)

* modules: add helpers to display init.lua and its store path

* docs: update 0.7 release notes

* modules: use writeDashBin for helpers

docs/release-notes/rl-0.7.md

@@ -141,3 +141,11 @@ configuration formats.
 
 - Add [neo-tree.nvim] as an alternative file-tree plugin. It will be available
   under `vim.filetree.neo-tree`, similar to nvimtree.
+
+- Add `print-nvf-config` & `print-nvf-config-path` helper scripts to Neovim
+  closure. Both of those scripts have been automatically added to your PATH upon
+  using neovimConfig or `programs.nvf.enable`.
+  - `print-nvf-config` will display your `init.lua`, in full.
+  - `print-nvf-config-path` will display the path to _a clone_ of your
+    `init.lua`. This is not the path used by the Neovim wrapper, but an
+    identical clone.

modules/default.nix

@@ -105,10 +105,30 @@ inputs: {
     inherit (vimOptions) viAlias vimAlias withRuby withNodeJs withPython3;
     inherit extraLuaPackages extraPython3Packages;
   };
+
+  # Additional helper scripts for printing and displaying nvf configuration
+  # in your commandline.
+  printConfig = pkgs.writers.writeDashBin "print-nvf-config" ''
+    cat << EOF
+      ${vimOptions.builtLuaConfigRC}
+    EOF
+  '';
+
+  printConfigPath = pkgs.writers.writeDashBin "print-nvf-config-path" ''
+    realpath ${pkgs.writeTextFile {
+      name = "nvf-init.lua";
+      text = vimOptions.builtLuaConfigRC;
+    }}
+  '';
 in {
   inherit (module) options config;
   inherit (module._module.args) pkgs;
 
-  # expose wrapped neovim-package
-  neovim = neovim-wrapped;
+  # 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";
+  };
 }