class Byebug::Edit

def description
  %{edit[ file:lineno]\tEdit specified file.
    With no argument, edits file containing most recent line listed.
    Editing targets can also be specified to start editing at a specific
    line in a specific file.}
end

def execute
  if not @match[1]
    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 names
  %w(edit)
end

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