class Bundler::Thor::Shell::Basic

Constants

DEFAULT_TERMINAL_WIDTH

Attributes

base[RW]
padding[R]

Public Instance Methods

ask(statement, *args) click to toggle source

Asks something to the user and receives a response.

If a default value is specified it will be presented to the user and allows them to select that value with an empty response. This option is ignored when limited answers are supplied.

If asked to limit the correct responses, you can pass in an array of acceptable answers. If one of those is not supplied, they will be shown a message stating that one of those answers must be given and re-asked the question.

If asking for sensitive information, the :echo option can be set to false to mask user input from $stdin.

If the required input is a path, then set the path option to true. This will enable tab completion for file paths relative to the current working directory on systems that support Readline.

Example

ask(“What is your name?”)

ask(“What is the planet furthest from the sun?”, :default => “Pluto”)

ask(“What is your favorite Neopolitan flavor?”, :limited_to => [“strawberry”, “chocolate”, “vanilla”])

ask(“What is your password?”, :echo => false)

ask(“Where should the file be saved?”, :path => true)

# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 78
def ask(statement, *args)
  options = args.last.is_a?(Hash) ? args.pop : {}
  color = args.first

  if options[:limited_to]
    ask_filtered(statement, color, options)
  else
    ask_simply(statement, color, options)
  end
end
error(statement) click to toggle source

Called if something goes wrong during the execution. This is used by Bundler::Thor internally and should not be used inside your scripts. If something went wrong, you can always raise an exception. If you raise a Bundler::Thor::Error, it will be rescued and wrapped in the method below.

# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 321
def error(statement)
  stderr.puts statement
end
file_collision(destination) { || ... } click to toggle source

Deals with file collision and returns true if the file should be overwritten and false otherwise. If a block is given, it uses the block response as the content for the diff.

Parameters

destination<String>

the destination file to solve conflicts

block<Proc>

an optional block that returns the value to be used in diff and merge

# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 264
def file_collision(destination)
  return true if @always_force
  options = block_given? ? "[Ynaqdhm]" : "[Ynaqh]"

  loop do
    answer = ask(
      %[Overwrite #{destination}? (enter "h" for help) #{options}],
      :add_to_history => false
    )

    case answer
    when nil
      say ""
      return true
    when is?(:yes), is?(:force), ""
      return true
    when is?(:no), is?(:skip)
      return false
    when is?(:always)
      return @always_force = true
    when is?(:quit)
      say "Aborting..."
      raise SystemExit
    when is?(:diff)
      show_diff(destination, yield) if block_given?
      say "Retrying..."
    when is?(:merge)
      if block_given? && !merge_tool.empty?
        merge(destination, yield)
        return nil
      end

      say "Please specify merge tool to `THOR_MERGE` env."
    else
      say file_collision_help
    end
  end
end
indent(count = 1) { || ... } click to toggle source

Sets the output padding while executing a block and resets it.

# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 41
def indent(count = 1)
  orig_padding = padding
  self.padding = padding + count
  yield
  self.padding = orig_padding
end
mute() { || ... } click to toggle source

Mute everything that's inside given block

# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 20
def mute
  @mute = true
  yield
ensure
  @mute = false
end
mute?() click to toggle source

Check if base is muted

# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 29
def mute?
  @mute
end
no?(statement, color = nil) click to toggle source

Make a question the to user and returns true if the user replies “n” or “no”.

# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 134
def no?(statement, color = nil)
  !!(ask(statement, color, :add_to_history => false) =~ is?(:no))
end
padding=(value) click to toggle source

Sets the output padding, not allowing less than zero values.

# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 35
def padding=(value)
  @padding = [0, value].max
end
print_in_columns(array) click to toggle source

Prints values in columns

Parameters

Array[String, String, …]

print_table(array, options = {}) click to toggle source

Prints a table.

Parameters

Array[Array[String, String, …]]

Options

indent<Integer>

Indent the first column by indent value.

colwidth<Integer>

Force the first column to colwidth spaces wide.

print_wrapped(message, options = {}) click to toggle source

Prints a long string, word-wrapping the text to the current width of the terminal display. Ideal for printing heredocs.

Parameters

String

Options

indent<Integer>

Indent each line of the printed paragraph by indent value.

say(message = "", color = nil, force_new_line = (message.to_s !~ /( |\t)\Z/)) click to toggle source

Say (print) something to the user. If the sentence ends with a whitespace or tab character, a new line is not appended (print + flush). Otherwise are passed straight to puts (behavior got from Highline).

Example

say(“I know you knew that.”)

# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 96
def say(message = "", color = nil, force_new_line = (message.to_s !~ /( |\t)\Z/))
  buffer = prepare_message(message, *color)
  buffer << "\n" if force_new_line && !message.to_s.end_with?("\n")

  stdout.print(buffer)
  stdout.flush
end
say_status(status, message, log_status = true) click to toggle source

Say a status with the given color and appends the message. Since this method is used frequently by actions, it allows nil or false to be given in log_status, avoiding the message from being shown. If a Symbol is given in log_status, it's used as the color.

# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 109
def say_status(status, message, log_status = true)
  return if quiet? || log_status == false
  spaces = "  " * (padding + 1)
  color  = log_status.is_a?(Symbol) ? log_status : :green

  status = status.to_s.rjust(12)
  status = set_color status, color, true if color

  buffer = "#{status}#{spaces}#{message}"
  buffer = "#{buffer}\n" unless buffer.end_with?("\n")

  stdout.print(buffer)
  stdout.flush
end
terminal_width() click to toggle source

This code was copied from Rake, available under MIT-LICENSE Copyright © 2003, 2004 Jim Weirich

# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 305
def terminal_width
  result = if ENV["THOR_COLUMNS"]
    ENV["THOR_COLUMNS"].to_i
  else
    unix? ? dynamic_width : DEFAULT_TERMINAL_WIDTH
  end
  result < 10 ? DEFAULT_TERMINAL_WIDTH : result
rescue
  DEFAULT_TERMINAL_WIDTH
end
yes?(statement, color = nil) click to toggle source

Make a question the to user and returns true if the user replies “y” or “yes”.

# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 127
def yes?(statement, color = nil)
  !!(ask(statement, color, :add_to_history => false) =~ is?(:yes))
end

Protected Instance Methods

as_unicode() { || ... } click to toggle source
# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 422
def as_unicode
  yield
end
ask_filtered(statement, color, options) click to toggle source
# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 452
def ask_filtered(statement, color, options)
  answer_set = options[:limited_to]
  correct_answer = nil
  until correct_answer
    answers = answer_set.join(", ")
    answer = ask_simply("#{statement} [#{answers}]", color, options)
    correct_answer = answer_set.include?(answer) ? answer : nil
    say("Your response must be one of: [#{answers}]. Please try again.") unless correct_answer
  end
  correct_answer
end
ask_simply(statement, color, options) click to toggle source
# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 435
def ask_simply(statement, color, options)
  default = options[:default]
  message = [statement, ("(#{default})" if default), nil].uniq.join(" ")
  message = prepare_message(message, *color)
  result = Bundler::Thor::LineEditor.readline(message, options)

  return unless result

  result = result.strip

  if default && result == ""
    default
  else
    result
  end
end
can_display_colors?() click to toggle source
# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 339
def can_display_colors?
  false
end
dynamic_width() click to toggle source

Calculate the dynamic width of the terminal

# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 394
def dynamic_width
  @dynamic_width ||= (dynamic_width_stty.nonzero? || dynamic_width_tput)
end
dynamic_width_stty() click to toggle source
# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 398
def dynamic_width_stty
  `stty size 2>/dev/null`.split[1].to_i
end
dynamic_width_tput() click to toggle source
# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 402
def dynamic_width_tput
  `tput cols 2>/dev/null`.to_i
end
lookup_color(color) click to toggle source
# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 343
def lookup_color(color)
  return color unless color.is_a?(Symbol)
  self.class.const_get(color.to_s.upcase)
end
prepare_message(message, *color) click to toggle source
# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 334
def prepare_message(message, *color)
  spaces = "  " * padding
  spaces + set_color(message.to_s, *color)
end
stderr() click to toggle source
# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 352
def stderr
  $stderr
end
stdout() click to toggle source
# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 348
def stdout
  $stdout
end
truncate(string, width) click to toggle source
# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 410
def truncate(string, width)
  as_unicode do
    chars = string.chars.to_a
    if chars.length <= width
      chars.join
    else
      chars[0, width - 3].join + "..."
    end
  end
end
unix?() click to toggle source
# File lib/bundler/vendor/thor/lib/thor/shell/basic.rb, line 406
def unix?
  RUBY_PLATFORM =~ /(aix|darwin|linux|(net|free|open)bsd|cygwin|solaris|irix|hpux)/i
end