Module: Rutaci::Interaction

Defined in:
lib/rutaci/interaction.rb

Overview

writes info from a source into the files it is a command executor, so it has tp provide an initializer which takes the options and a method ‘run’ which takes an array of filenames

Class Method Summary collapse

Class Method Details

.lineedit(promt, default_value, completion_strings = []) ⇒ Object

use GNU readline for the interactive input



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# File 'lib/rutaci/interaction.rb', line 31

def self.lineedit(promt, default_value, completion_strings = [])
  # FIXME: display the default value and don't wait for the user to press TAB
  # it seems that this requires hacking the readline module
  add_to_history = true
  Readline.completion_proc = Proc.new do |current_line|
    if current_line.empty?
      # if we haven't typed anything, the completion is the default value
      candidates = [default_value]
    else
      # completion: look which completion string starts with what we've typed
      # TODO: don't search for the whole current_line, but also substrings.
      # example: current_file = "some foob" and completion_strings = ["foobar"]
      candidates = completion_strings.select {|str| str.index(current_line) == 0}
    end
    candidates
  end
  Readline.completion_append_character = "" # per default a space will be append
  begin
    value = Readline.readline promt, add_to_history
  rescue Interrupt
    puts # just to have the linebreak
    value = default_value
  end
  return value
end

.print_lineedit_help ⇒ Object 



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# File 'lib/rutaci/interaction.rb', line 25

def self.print_lineedit_help
  puts "Use <TAB> on an empty line will insert the default value, else completion is done"
  puts "Use <Ctrl-C> to discard your changes and use the default value"
end