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Path: /opt/cpanel/ea-ruby27/root/usr/local/share/gems/gems/irb-1.18.0/lib/irb/command/

Viewing File: debug.rb

require_relative "../debug"

module IRB
  # :stopdoc:

  module Command
    class Debug < Base
      category "Debugging"
      description "Start the debugger of debug.gem."

      def execute(_arg)
        execute_debug_command
      end

      def execute_debug_command(pre_cmds: nil, do_cmds: nil)
        pre_cmds = pre_cmds&.rstrip
        do_cmds = do_cmds&.rstrip

        if irb_context.with_debugger
          # If IRB is already running with a debug session, throw the command and IRB.debug_readline will pass it to the debugger.
          if cmd = pre_cmds || do_cmds
            throw :IRB_EXIT, cmd
          else
            puts "IRB is already running with a debug session."
            return
          end
        else
          # If IRB is not running with a debug session yet, then:
          # 1. Check if the debugging command is run from a `binding.irb` call.
          # 2. If so, try setting up the debug gem.
          # 3. Insert a debug breakpoint at `Irb#debug_break` with the intended command.
          # 4. Exit the current Irb#run call via `throw :IRB_EXIT`.
          # 5. `Irb#debug_break` will be called and trigger the breakpoint, which will run the intended command.
          unless irb_context.from_binding?
            puts "Debugging commands are only available when IRB is started with binding.irb"
            return
          end

          if IRB.respond_to?(:JobManager)
            warn "Can't start the debugger when IRB is running in a multi-IRB session."
            return
          end

          unless IRB::Debug.setup(irb_context.irb)
            puts <<~MSG
              You need to install the debug gem before using this command.
              If you use `bundle exec`, please add `gem "debug"` into your Gemfile.
            MSG
            return
          end

          IRB::Debug.insert_debug_break(pre_cmds: pre_cmds, do_cmds: do_cmds)

          # exit current Irb#run call
          throw :IRB_EXIT
        end
      end
    end

    class DebugCommand < Debug
      class << self
        def category
          "Debugging"
        end

        def description
          command_name = self.name.split("::").last.downcase
          "Start the debugger of debug.gem and run its `#{command_name}` command."
        end
      end
    end
  end
end