don't call exit directly

lib/standard/lsp/kills_server.rb

@@ -0,0 +1,10 @@
+module Standard
+  module Lsp
+    class KillsServer
+      def call(&blk)
+        at_exit(&blk) unless blk.nil?
+        exit 0
+      end
+    end
+  end
+end

lib/standard/lsp/routes.rb

@@ -1,3 +1,5 @@
+require_relative "kills_server"
+
 module Standard
   module Lsp
     class Routes
@@ -7,6 +9,7 @@ def initialize(writer, logger, standardizer)
         @standardizer = standardizer
 
         @text_cache = {}
+        @kills_server = KillsServer.new
       end
 
       def self.handle(name, &block)
@@ -38,11 +41,11 @@ def for(name)
       end
 
       handle "shutdown" do |request|
-        @logger.puts "Client asked to shutdown Standard LSP server. Exiting..."
-        at_exit {
+        @logger.puts "Client asked to shutdown Standard LSP server."
+        @kills_server.call do
+          @logger.puts "Exiting..."
           @writer.write(id: request[:id], result: nil)
-        }
-        exit 0
+        end
       end
 
       handle "textDocument/diagnostic" do |request|
@@ -73,8 +76,10 @@ def for(name)
       end
 
       handle "workspace/didChangeWatchedFiles" do |request|
-        @logger.puts "Configuration file changed; restart required"
-        exit 0
+        if request[:params][:changes].any? { |change| change[:uri].end_with?(".standard.yml") }
+          @logger.puts "Configuration file changed; restart required"
+          @kills_server.call
+        end
       end
 
       handle "workspace/executeCommand" do |request|