Module: Optplus::IO

Defined in:
lib/optplus/IO.rb

Overview

bunch of convenience methods to output messages and get inputs for command-line scripts

Constant Summary collapse

Answers =

lookup to map between symbols and responses

Hash.new(false).merge({:no=>'n', :yes=>'y', :skip=>'s', :diff=>'d', :list=>'l'})

Instance Method Summary collapse

Instance Method Details

#alert(txt) ⇒ Object 



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# File 'lib/optplus/IO.rb', line 35

def alert(txt)
  $stderr.puts txt.red.bold
end

#ask(question, default = :no, answers = nil) ⇒ Object 



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# File 'lib/optplus/IO.rb', line 39

def ask(question, default=:no, answers=nil)
  answers ||= Answers
  default = answers.keys.first unless answers.has_key?(default)
  def_key = answers[default]
  answer_options = answers.values.collect {|k| k == def_key ? k.upcase : k}.join('')
  loop do
    $stderr.print "#{question}(#{answer_options})? "
    response = $stdin.gets[0,1].downcase
    if response == '?' then
      answers.each_pair do |key, val|
        $stderr.puts "#{key}"
      end
      next
    end
    if answers.has_value?(response) then
      return answers.key(response)
    else
      return default
    end
  end
  
end

#continue?(question, default = false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/optplus/IO.rb', line 62

def continue?(question, default=false)
  def_response = default ? :yes : :no
  response = ask(question, def_response, {:yes=>'y', :no=>'n'})
  return response == :yes
end

#say(txt) ⇒ Object 



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# File 'lib/optplus/IO.rb', line 23

def say(txt)
  $stderr.puts txt
end

#say_ok(txt) ⇒ Object 



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# File 'lib/optplus/IO.rb', line 27

def say_ok(txt)
  $stderr.puts txt.green
end

#warn(txt) ⇒ Object 



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# File 'lib/optplus/IO.rb', line 31

def warn(txt)
  $stderr.puts txt.yellow
end