Module: CLI::UI::Prompt

Defined in:
lib/cli/ui/prompt.rb,
lib/cli/ui/prompt/options_handler.rb,
lib/cli/ui/prompt/interactive_options.rb

Class Method Summary collapse

Class Method Details

.ask(question, options: nil, default: nil, is_file: nil, allow_empty: true, &options_proc) ⇒ Object

Ask a user a question with either free form answer or a set of answers (multiple choice) Can use arrows, y/n, numbers (1/2), and vim bindings to control multiple choice selection Do not use this method for yes/no questions. Use confirm

  • Handles free form answers (options are nil)
  • Handles default answers for free form text
  • Handles file auto completion for file input
  • Handles interactively choosing answers using InteractiveOptions

https://user-images.githubusercontent.com/3074765/33799822-47f23302-dd01-11e7-82f3-9072a5a5f611.png

Attributes

  • question - (required) The question to ask the user

Options

  • :options - Options that the user may select from. Will use InteractiveOptions to do so.
  • :default - The default answer to the question (e.g. they just press enter and don't input anything)
  • :is_file - Tells the input to use file auto-completion (tab completion)
  • :allow_empty - Allows the answer to be empty

Note:

  • :options or providing a Block conflicts with :default and :is_file, you cannot set options with either of these keywords
  • :default conflicts with +:allow_empty:, you cannot set these together
  • :options conflicts with providing a Block , you may only set one

Block (optional)

  • A Proc that provides a OptionsHandler and uses the public :option method to add options and their respective handlers

Return Value

  • If a Block was not provided, the selected option or response to the free form question will be returned
  • If a Block was provided, the evaluted value of the Block will be returned

Example Usage:

Free form question CLI::UI::Prompt.ask('What color is the sky?')

Free form question with a file answer CLI::UI::Prompt.ask('Where is your Gemfile located?', is_file: true)

Free form question with a default answer CLI::UI::Prompt.ask('What color is the sky?', default: 'blue')

Free form question when the answer can be empty CLI::UI::Prompt.ask('What is your opinion on this question?', allow_empty: true)

Interactive (multiple choice) question CLI::UI::Prompt.ask('What kind of project is this?', options: %w(rails go ruby python))

Interactive (multiple choice) question with defined handlers CLI::UI::Prompt.ask('What kind of project is this?') do |handler| handler.option('rails') { |selection| selection } handler.option('go') { |selection| selection } handler.option('ruby') { |selection| selection } handler.option('python') { |selection| selection } end



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# File 'lib/cli/ui/prompt.rb', line 74

def ask(question, options: nil, default: nil, is_file: nil, allow_empty: true, &options_proc)
  if ((options || block_given?) && (default || is_file))
    raise(ArgumentError, 'conflicting arguments: options provided with default or is_file')
  end

  if options || block_given?
    ask_interactive(question, options, &options_proc)
  else
    ask_free_form(question, default, is_file, allow_empty)
  end
end

.confirm(question) ⇒ Object

Asks the user a yes/no question. Can use arrows, y/n, numbers (1/2), and vim bindings to control

Example Usage:

Confirmation question CLI::UI::Prompt.confirm('Is the sky blue?')



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# File 'lib/cli/ui/prompt.rb', line 94

def confirm(question)
  ask_interactive(question, %w(yes no)) == 'yes'
end