feat(lib): Add helper fns to handle theme naming

Rose Pine names the default theme flavor something like "Rose Pine", and
when a theme needs to be kebab case that requires extra logic to avoid a
hanging - when the main flavor is selected.

modules/lib/default.nix

@@ -3,17 +3,20 @@
   lib,
   pkgs,
   ...
-}: let
+}:
+let
   # this is a recursive attribute with all the functions below
   inherit (lib) rp;
-in {
+in
+{
   # string -> type -> string -> a
   # this is an internal function and shouldn't be
   # used unless you know what you're doing. it takes
   # a string (the name of the property, i.e., flavor
   # or accent), the type of the property, the name of
   # the module, followed by local config attrset
-  mkBasicOpt = attr: type: name:
+  mkBasicOpt =
+    attr: type: name:
     lib.mkOption {
       inherit type;
       default = config.rose-pine.${attr};
@@ -42,17 +45,30 @@ in {
     ];
   };
 
+  # string -> string
+  # this returns a blank string when string == "main",
+  # because Rose Pine names the default flavor rose pine
+  getFlavor = flavor: (if flavor == "main" then "" else flavor);
+
+  # string -> string
+  # convert flavor to full theme name in kebab case
+  # a convenience to deal with the main flavor naming
+  getKebabTheme = flavor: (if flavor == "main" then "rose-pine" else "rose-pine-${flavor}");
+
   # string -> string
   # this capitalizes the first letter in a string,
   # which is sometimes needed in order to format
   # the names of themes correctly
-  mkUpper = str:
+  mkUpper =
+    str:
     (lib.toUpper (builtins.substring 0 1 str)) + (builtins.substring 1 (builtins.stringLength str) str);
 
   # a -> path -> a
   # fromJSON but for yaml (and without readFile)
   # a should be the local pkgs attrset
-  fromYaml = file: let
+  fromYaml =
+    file:
+    let
       # convert to json
       json = pkgs.runCommand "converted.json" { } ''
         ${lib.getExe pkgs.yj} < ${file} > $out
@@ -63,7 +79,9 @@ in {
   # a -> path -> a
   # fromJSON but for ini (and without readFile)
   # a should be the local pkgs attrset
-  fromINI = file: let
+  fromINI =
+    file:
+    let
       # convert to json
       json = pkgs.runCommand "converted.json" { } ''
         ${lib.getExe pkgs.jc} --ini < ${file} > $out
@@ -74,11 +92,14 @@ in {
   # a -> path -> a
   # fromJSON but for raw ini (and without readFile)
   # a should be the local pkgs attrset
-  fromINIRaw = file: let
+  fromINIRaw =
+    file:
+    let
       inherit (builtins) fromJSON readFile;
 
       # convert to json
-    json = with pkgs;
+      json =
+        with pkgs;
         runCommand "converted.json" { } ''
           ${jc}/bin/jc --ini -r < ${file} > $out
         '';
@@ -91,13 +112,13 @@ in {
   # of the module, while `enableDefault` is a boolean
   # representing the default of the created `enable`
   # option
-  mkRosePineOpt = {
+  mkRosePineOpt =
+    {
       name,
       enableDefault ? config.rose-pine.enable,
-  }: {
+    }:
-    enable =
+    {
-      lib.mkEnableOption "Rose Pine theme for ${name}"
+      enable = lib.mkEnableOption "Rose Pine theme for ${name}" // {
-      // {
         default = enableDefault;
       };
 
@@ -120,17 +141,18 @@ in {
   # returns the current release version of nixos or home-manager. throws an evaluation error if neither are
   # found
   getModuleRelease =
-    config.home.version.release
+    config.home.version.release or config.system.nixos.release
-    or config.system.nixos.release
       or (throw "Couldn't determine release version!");
 
   # string -> a -> a
   # if the current module release is less than `minVersion`, all options are made no-ops with
   # `lib.mkSinkUndeclaredOptions`
-  mkVersionedOpts = minVersion: option:
+  mkVersionedOpts =
-    if lib.versionAtLeast rp.getModuleRelease minVersion
+    minVersion: option:
-    then option
+    if lib.versionAtLeast rp.getModuleRelease minVersion then
-    else lib.mkSinkUndeclaredOptions {};
+      option
+    else
+      lib.mkSinkUndeclaredOptions { };
 
   # string -> a
   # this is to ensure users are running a supported version of nixos/home-manager