Add an option to ignore unnecessary directories such as node_modules/

The `Listen.to` method accepts an `ignore` option, allowing the listener to ignore paths matching specified patterns.

In this commit, the `ignore` option passed to the Listen.to method is made configurable through a configuration file.

Author: mktakuya

lib/generators/templates/rails_live_reload.rb

@@ -11,5 +11,8 @@
   # config.watch %r{app/helpers/.+\.rb}, reload: :always
   # config.watch %r{config/locales/.+\.yml}, reload: :always
 
+  # Ignored folders & files
+  # config.ignore %r{node_modules/}
+
   # config.enabled = Rails.env.development?
 end if defined?(RailsLiveReload)

lib/rails_live_reload/config.rb

@@ -12,13 +12,17 @@ def patterns
       config.patterns
     end
 
+    def ignore_patterns
+      config.ignore_patterns
+    end
+
     def enabled?
       config.enabled
     end
   end
 
   class Config
-    attr_reader :patterns
+    attr_reader :patterns, :ignore_patterns
     attr_accessor :url, :watcher, :files, :enabled
 
     def initialize
@@ -33,6 +37,8 @@ def initialize
         %r{(app|vendor)/(assets|javascript)/\w+/(.+\.(css|js|html|png|jpg|ts|jsx)).*} => :always
       }
       @default_patterns_changed = false
+
+      @ignore_patterns = []
     end
 
     def root_path
@@ -48,6 +54,10 @@ def watch(pattern, reload: :on_change)
       patterns[pattern] = reload
     end
 
+    def ignore(pattern)
+      @ignore_patterns << pattern
+    end
+
     def socket_path
       root_path.join('tmp/sockets/rails_live_reload.sock').then do |path|
         break path if path.to_s.size <= 104 # 104 is the max length of a socket path

lib/rails_live_reload/watcher.rb

@@ -27,7 +27,7 @@ def initialize
 
     def start_listener
       Thread.new do
-        listener = Listen.to(root) do |modified, added, removed|
+        listener = Listen.to(root, ignore: RailsLiveReload.ignore_patterns) do |modified, added, removed|
           all = modified + added + removed
           all.each do |file|
             files[file] = File.mtime(file).to_i rescue nil