class Byebug::Edit

def execute
  if not @match[1] or @match[1].strip.empty?
    unless @state.context
      errmsg "We are not in a state that has an associated file.\n"
      return 
    end
    file = @state.file
    line_number = @state.line
  elsif @pos_match = /([^:]+)[:]([0-9]+)/.match(@match[1])
    file, line_number = @pos_match.captures
  else
    errmsg "Invalid file/line number specification: #{@match[1]}\n"
    return
  end
  editor = ENV['EDITOR'] || 'ex'
  if File.readable?(file)
    system("#{editor} +#{line_number} #{file}")
  else
    errmsg "File \"#{file}\" is not readable.\n"
  end
end

def help(cmd)
  %{
    Edit specified file.
o argument, edits file containing most recent line listed.
g targets can also be specified in this:
:LINENUM, to edit at that line in that file,
  }
end

def help_command
  'edit'
end

def regexp
  /^\s* ed(?:it)? (?:\s+(.*))?$/ix
end