require 'breakpoint' require 'optparse' require 'timeout' Options = { :ClientURI => nil, :ServerURI => "druby://localhost:42531", :RetryDelay => 2, :Permanent => true, :Verbose => false } ARGV.options do |opts| script_name = File.basename($0) opts.banner = [ "Usage: ruby #{script_name} [Options] [server uri]", "", "This tool lets you connect to a breakpoint service ", "which was started via Breakpoint.activate_drb.", "", "The server uri defaults to druby://localhost:42531" ].join("\n") opts.separator "" opts.on("-c", "--client-uri=uri", "Run the client on the specified uri.", "This can be used to specify the port", "that the client uses to allow for back", "connections from the server.", "Default: Find a good URI automatically.", "Example: -c druby://localhost:12345" ) { |Options[:ClientURI]| } opts.on("-s", "--server-uri=uri", "Connect to the server specified at the", "specified uri.", "Default: druby://localhost:42531" ) { |Options[:ServerURI]| } opts.on("-R", "--retry-delay=delay", Integer, "Automatically try to reconnect to the", "server after delay seconds when the", "connection failed or timed out.", "A value of 0 disables automatical", "reconnecting completely.", "Default: 10" ) { |Options[:RetryDelay]| } opts.on("-P", "--[no-]permanent", "Run the breakpoint client in permanent mode.", "This means that the client will keep continue", "running even after the server has closed the", "connection. Useful for example in Rails." ) { |Options[:Permanent]| } opts.on("-V", "--[no-]verbose", "Run the breakpoint client in verbose mode.", "Will produce more messages, for example between", "individual breakpoints. This might help in seeing", "that the breakpoint client is still alive, but adds", "quite a bit of clutter." ) { |Options[:Verbose]| } opts.separator "" opts.on("-h", "--help", "Show this help message." ) { puts opts; exit } opts.on("-v", "--version", "Display the version information." ) do id = %q$Id: breakpoint_client.rb 91 2005-02-04 22:34:08Z flgr $ puts id.sub("Id: ", "") puts "(Breakpoint::Version = #{Breakpoint::Version})" exit end opts.parse! end Options[:ServerURI] = ARGV[0] if ARGV[0] module Handlers extend self def breakpoint_handler(workspace, message) puts message IRB.start(nil, nil, workspace) puts "" if Options[:Verbose] then puts "Resumed execution. Waiting for next breakpoint...", "" end end def eval_handler(code) result = eval(code, TOPLEVEL_BINDING) if result then DRbObject.new(result) else result end end def collision_handler() msg = [ " *** Breakpoint service collision ***", " Another Breakpoint service tried to use the", " port already occupied by this one. It will", " keep waiting until this Breakpoint service", " is shut down.", " ", " If you are using the Breakpoint library for", " debugging a Rails or other CGI application", " this likely means that this Breakpoint", " session belongs to an earlier, outdated", " request and should be shut down via 'exit'." ].join("\n") if RUBY_PLATFORM["win"] then # This sucks. Sorry, I'm not doing this because # I like funky message boxes -- I need to do this # because on Windows I have no way of displaying # my notification via puts() when gets() is still # being performed on STDIN. I have not found a # better solution. begin require 'tk' root = TkRoot.new { withdraw } Tk.messageBox('message' => msg, 'type' => 'ok') root.destroy rescue Exception puts "", msg, "" end else puts "", msg, "" end end end # Used for checking whether we are currently in the reconnecting loop. reconnecting = false loop do DRb.start_service(Options[:ClientURI]) begin service = DRbObject.new(nil, Options[:ServerURI]) begin ehandler = Handlers.method(:eval_handler) chandler = Handlers.method(:collision_handler) handler = Handlers.method(:breakpoint_handler) service.eval_handler = ehandler service.collision_handler = chandler service.handler = handler reconnecting = false if Options[:Verbose] then puts "Connection established. Waiting for breakpoint...", "" end loop do begin service.ping rescue DRb::DRbConnError => error puts "Server exited. Closing connection...", "" exit! unless Options[:Permanent] break end sleep(0.5) end ensure service.eval_handler = nil service.collision_handler = nil service.handler = nil end rescue Exception => error if Options[:RetryDelay] > 0 then if not reconnecting then reconnecting = true puts "No connection to breakpoint service at #{Options[:ServerURI]} " + "(#{error.class})" puts error.backtrace if $DEBUG puts "Tries to connect will be made every #{Options[:RetryDelay]} seconds..." end sleep Options[:RetryDelay] retry else raise end end end