Fix #169 - Files with very long paths fail to extract on Windows

- Use robocopy instead of xcopy, alter to smooth out exit codes of 0-3 to become 0

Signed-off-by: Christopher Williams <[email protected]>

libraries/sevenzip_command_builder.rb

@@ -40,7 +40,7 @@ def sevenzip_command
         currdir += "\\%#{count}"
       end
 
-      cmd += "#{ENV.fetch('SystemRoot')}\\System32\\xcopy \"#{currdir}\" \"#{resource.home_dir}\" /s /e"
+      cmd += "(#{ENV.fetch('SystemRoot')}\\System32\\robocopy \"#{currdir}\" \"#{resource.home_dir}\" /s /e) ^& IF %ERRORLEVEL% LEQ 3 cmd /c exit 0"
     end
 
     def sevenzip_binary