Class: IRB::ExtendCommand::Debug

Inherits:
Nop show all
Defined in:
lib/irb/cmd/debug.rb

Direct Known Subclasses

DebugCommand

Defined Under Namespace

Modules: SkipPathHelperForIRB

Constant Summary collapse

BINDING_IRB_FRAME_REGEXPS = 
[
  '<internal:prelude>',
  binding.method(:irb).source_location.first,
].map { |file| /\A#{Regexp.escape(file)}:\d+:in `irb'\z/ }
IRB_DIR = 
File.expand_path('..', __dir__)

Instance Attribute Summary

Attributes inherited from Nop

#irb_context

Instance Method Summary collapse

Methods inherited from Nop

category, description, execute, #initialize, #irb

Constructor Details

This class inherits a constructor from IRB::ExtendCommand::Nop

Instance Method Details

#execute(pre_cmds: nil, do_cmds: nil) ⇒ Object 



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# File 'lib/irb/cmd/debug.rb', line 17

def execute(pre_cmds: nil, do_cmds: nil)
  unless binding_irb?
    puts "`debug` command is only available when IRB is started with binding.irb"
    return
  end

  unless setup_debugger
    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

  options = { oneshot: true, hook_call: false }
  if pre_cmds || do_cmds
    options[:command] = ['irb', pre_cmds, do_cmds]
  end
  if DEBUGGER__::LineBreakpoint.instance_method(:initialize).parameters.include?([:key, :skip_src])
    options[:skip_src] = true
  end

  # To make debugger commands like `next` or `continue` work without asking
  # the user to quit IRB after that, we need to exit IRB first and then hit
  # a TracePoint on #debug_break.
  file, lineno = IRB::Irb.instance_method(:debug_break).source_location
  DEBUGGER__::SESSION.add_line_breakpoint(file, lineno + 1, **options)
  # exit current Irb#run call
  throw :IRB_EXIT
end