Class: Byebug::CommandProcessor

Inherits:
Processor show all
Defined in:
lib/byebug/processor.rb

Defined Under Namespace

Classes: State

Instance Attribute Summary collapse

Attributes inherited from Processor

#interface

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(interface = LocalInterface.new) ⇒ CommandProcessor

Returns a new instance of CommandProcessor.



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# File 'lib/byebug/processor.rb', line 22

def initialize(interface = LocalInterface.new)
  super(interface)

  @display = []
  @mutex = Mutex.new
  @last_cmd               = nil   # To allow empty (just <RET>) commands
  @last_file              = nil   # Filename the last time we stopped
  @last_line              = nil   # Line number the last time we stopped
  @context_was_dead       = false  # Assume we haven't started.
end

Instance Attribute Details

#display ⇒ Object (readonly)

Returns the value of attribute display.



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# File 'lib/byebug/processor.rb', line 20

def display
  @display
end

Class Method Details

.canonic_file(filename) ⇒ Object

Regularize file name.

This is also used as a common funnel place if basename is desired or if we are working remotely and want to change the basename. Or we are eliding filenames.



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# File 'lib/byebug/processor.rb', line 48

def self.canonic_file(filename)
  return '(nil)' if not filename

  # For now we want resolved filenames
  if Command.settings[:basename]
    File.basename(filename)
  else
    # Cache this?
    Pathname.new(filename).cleanpath.to_s
  end
end

.protect(mname) ⇒ Object 



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# File 'lib/byebug/processor.rb', line 60

def self.protect(mname)
  alias_method "__#{mname}", mname
  module_eval %{
    def #{mname}(*args)
      @mutex.synchronize do
        return unless @interface
        __#{mname}(*args)
      end
    rescue IOError, Errno::EPIPE
      self.interface = nil
    rescue SignalException
      raise
    rescue Exception
      print "INTERNAL ERROR!!! #\{$!\}\n" rescue nil
      print $!.backtrace.map{|l| "\t#\{l\}"}.join("\n") rescue nil
    end
  }
end

Instance Method Details

#at_breakpoint(context, breakpoint) ⇒ Object 



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# File 'lib/byebug/processor.rb', line 79

def at_breakpoint(context, breakpoint)
  n = Byebug.breakpoints.index(breakpoint) + 1
  file = CommandProcessor.canonic_file(breakpoint.source)
  line = breakpoint.pos
  print "Stopped by breakpoint #{n} at #{file}:#{line}\n"
end

#at_catchpoint(context, excpt) ⇒ Object 



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# File 'lib/byebug/processor.rb', line 87

def at_catchpoint(context, excpt)
  file = CommandProcessor.canonic_file(context.frame_file(0))
  line = context.frame_line(0)
  print "Catchpoint at %s:%d: `%s' (%s)\n", file, line, excpt, excpt.class
  fs = context.stack_size
  tb = caller(0)[-fs..-1]
  if tb
    for i in tb
      print "\tfrom %s\n", i
    end
  end
end

#at_line(context, file, line) ⇒ Object 



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# File 'lib/byebug/processor.rb', line 111

def at_line(context, file, line)
  process_commands(context, file, line)
end

#at_return(context, file, line) ⇒ Object 



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# File 'lib/byebug/processor.rb', line 116

def at_return(context, file, line)
  process_commands(context, file, line)
end

#at_tracing(context, file, line) ⇒ Object 



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# File 'lib/byebug/processor.rb', line 101

def at_tracing(context, file, line)
  if file != @last_file || line != @last_line || Command.settings[:linetrace_plus]
    @last_file, @last_line = file, line
    print "Tracing: #{CommandProcessor.canonic_file(file)}:#{line} " \
          "#{Byebug.line_at(file,line)}\n"
  end
  always_run(context, file, line, 2)
end

#interface=(interface) ⇒ Object 



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# File 'lib/byebug/processor.rb', line 33

def interface=(interface)
  @mutex.synchronize do
    @interface.close if @interface
    @interface = interface
  end
end