module Gem::UserInteraction

UserInteraction allows RubyGems to interact with the user through standard methods that can be replaced with more-specific UI methods for different displays.

Since UserInteraction dispatches to a concrete UI class you may need to reference other classes for specific behavior such as Gem::ConsoleUI or Gem::SilentUI.

Example:

class X
  include Gem::UserInteraction

  def get_answer
    n = ask("What is the meaning of life?")
  end
end

Public Instance Methods

alert (statement, question = nil)

Displays an alert statement. Asks a question if given.

# File lib/rubygems/user_interaction.rb, line 98
def alert(statement, question = nil)
  ui.alert statement, question
end

alert_error (statement, question = nil)

Displays an error statement to the error output location. Asks a question if given.

# File lib/rubygems/user_interaction.rb, line 106
def alert_error(statement, question = nil)
  ui.alert_error statement, question
end

alert_warning (statement, question = nil)

Displays a warning statement to the warning output location. Asks a question if given.

# File lib/rubygems/user_interaction.rb, line 114
def alert_warning(statement, question = nil)
  ui.alert_warning statement, question
end

ask (question)

Asks a question and returns the answer.

# File lib/rubygems/user_interaction.rb, line 121
def ask(question)
  ui.ask question
end

ask_for_password (prompt)

Asks for a password with a prompt

# File lib/rubygems/user_interaction.rb, line 128
def ask_for_password(prompt)
  ui.ask_for_password prompt
end

ask_yes_no (question, default = nil)

Asks a yes or no question. Returns true for yes, false for no.

# File lib/rubygems/user_interaction.rb, line 135
def ask_yes_no(question, default = nil)
  ui.ask_yes_no question, default
end

choose_from_list (question, list)

Asks the user to answer question with an answer from the given list.

# File lib/rubygems/user_interaction.rb, line 142
def choose_from_list(question, list)
  ui.choose_from_list question, list
end

say (statement = "")

Displays the given statement on the standard output (or equivalent).

# File lib/rubygems/user_interaction.rb, line 149
def say(statement = "")
  ui.say statement
end

terminate_interaction (exit_code = 0)

Terminates the RubyGems process with the given exit_code

# File lib/rubygems/user_interaction.rb, line 156
def terminate_interaction(exit_code = 0)
  ui.terminate_interaction exit_code
end

verbose (msg = nil) { || ... }

Calls say with msg or the results of the block if really_verbose is true.

# File lib/rubygems/user_interaction.rb, line 164
def verbose(msg = nil)
  say(clean_text(msg || yield)) if Gem.configuration.really_verbose
end