Doc fixes

OPTIONS.md

@@ -43,48 +43,3 @@ Default value: not defined
 A non-empty string representing the name of the configuration to use in the environment.
 
 Default value: not defined
-
-## Node.js
-
-[https://nodejs.org/en](https://nodejs.org/en)
-
-### javascript.node.corepack-shims
-
-An array of strings which, if `javascript.node.enable` is true, are passed to `corepack enable`, creating [corepack](https://nodejs.org/api/corepack.html) package manager shims.
-
-Currently, supported values are `"yarn"`, `"pnpm"`, and `"npm"`.
-
-Default value: `[]`
-
-### javascript.node.enable
-
-Whether to add the Node.js runtime to the environment.
-
-Default value: false
-
-### javascript.node.env
-
-If set, then the `NODE_ENV` variable is set to this value in the environment. The only valid values are `"production"`, `"development"`, and `"test"`.
-
-Default value: unset
-
-### javascript.node.package
-
-If `javascript.volta.enable` is true, this package is added to the environment.  There are [several alternative packages in nixpkgs](https://search.nixos.org/packages?from=0&size=50&sort=relevance&type=packages&query=nodejs-), such as `nodejs-slim` (which lacks npm), or `nodejs_22` (the latest version in the 22.x line).
-
-Default value: `pkgs.nodejs`
-
-## Volta
-
-[The Hassle-Free JavaScript Tool Manager](https://volta.sh/)
-
-### javascript.volta.enable
-
-Whether to add volta to the environment.
-
-Default value: false
-### javascript.volta.home
-
-A non-empty string.  If `javascript.volta.enable` is true, the `VOLTA_HOME` variable is set to this value in the environment.
-
-Default value: `"$HOME/.volta"`

README.md

@@ -1,17 +1,32 @@
 # gcloud-nix
 
-A [make-shell](https://github.com/nicknovitski/make-shell) module for the Google Cloud SDK, or `gcloud` CLI tool.
+A [make-shell](https://github.com/nicknovitski/make-shell) module for [the Google Cloud SDK](https://cloud.google.com/sdk), or `gcloud`.
 
 ## Why?
 
 `make-shell` is a modular interface for making nix derivations intended for use by the `nix develop` command.  It has it's own lengthy [WHY document](https://github.com/nicknovitski/make-shell/blob/main/WHY.md).
 
-The Google Cloud SDK nix package has a
+I wrote this module to scratch a small itch I had when working on a bunch of projects were all deployed to Google Cloud, especially on Google Kubernetes Engine.  Once this module existed I could write a module that defines shared settings, and have project-specific overrides this:
+```
+# gke.nix
+{pkgs, ...}: {
+  gcloud.enable = true;
+  gcloud.extra-components = [ "kubectl" "gke-gcloud-auth-plugin" "skaffold" ];
+}
 
-
-This is a module for `make-shell` that lets you 
+# For each project:
+pkgs.make-shell {
+  imports = [./gke.nix]; # DRY!
+  # project-specific options
+}
 
-I work on projects  which attempts to explain how it might be useful, but I thought that creating this repository might also give an indirect explanation.  
+# For example, a project which also uses pubsub:
+pkgs.make-shell ({pkgs, ...}: {
+  imports = [./gke.nix];
+  gcloud.extra-components = [ "pubsub-emulator" ]; # merges cleanly with the components in gke.nix!
+  packages = [ pkgs.openjdk ]; # necessary for the emulator to run
+})
+```
 
 ## Installation
 
@@ -30,7 +45,7 @@ Then, add the shell module to your shell's imports.  It'll look something like t
 ```nix
 devShells.default = pkgs.make-shell = { 
   imports = [inputs.gcloud-nix.shellModules.default]; # add option declarations...
-  javascript.gcloud.enable = true; # ...and definitions!
+  gcloud.enable = true; # ...and definitions!
 }
 # or, if you're using flake-parts...
 make-shell.imports = [gcloud-nix.shellModules.default]; # shared imports for all `make-shells` attributes
@@ -39,7 +54,7 @@ make-shells.default = {gcloud.enable = true;};
 
 ## Usage
 
-The options this module declares are documented [the OPTIONS.md file](OPTIONS.md).  Although if you know even a little nix, I bet you can read the declarations directly from [the module itself](shell-modules/default.nix) directory.
+The options which this module declares are documented [the OPTIONS.md file](OPTIONS.md).  Although if you know even a little nix, I bet you can read the declarations directly from [the module itself](shell-modules/default.nix).
 
 ## Examples
 

shell-modules/default.nix

@@ -48,7 +48,7 @@ in
     };
     properties = mkOption {
       default = { };
-      description = "k";
+      description = "Configuration properties to set in the shell";
       type = types.attrsOf (
         types.attrsOf (
           types.oneOf [