Option-less sync

README.md

@@ -93,21 +93,19 @@ Need to use an icon from another library?
 2. add the (SVG) icons to the created directory **app/assets/svg/icons/simple_icons**;
 
 Every custom icon can now be used with the same interface as first-party icon libraries.
-
 ```ruby
 icon "apple", library: "simple_icons", class: "text-black"
 ```
 
 
 ## Sync icons
 
-If a library gets updated, sync the icons to your app by running
-
+To sync all installed libraries, run
 ```bash
-rails generate rails_icons:sync --libraries=LIBRARY_NAME
+rails generate rails_icons:sync
 ```
 
-**Example**
+To sync only a specific library, run
 ```bash
 rails generate rails_icons:sync --libraries=heroicons
 

lib/generators/rails_icons/sync_generator.rb

@@ -11,9 +11,21 @@ class SyncGenerator < Rails::Generators::Base
     source_root File.expand_path("templates", __dir__)
 
     def sync_icons
-      raise "[Rails Icons] Not a valid library" if options[:libraries].empty?
+      raise "[Rails Icons] Not a valid library" if libraries.empty?
 
-      options[:libraries].each { Sync::Engine.new(_1).sync }
+      libraries.each { Sync::Engine.new(_1).sync }
+    end
+
+    private
+
+    def libraries
+      options[:libraries].presence || synced_libraries
+    end
+
+    def synced_libraries
+      RailsIcons.libraries.keys.map(&:to_s).select do |library|
+        Dir.exist?(File.join(RailsIcons.configuration.destination_path, library.to_s))
+      end
     end
   end
 end