Class: Bundler::Thor::Shell::Basic

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses: Color, HTML
Inherits:	Object
Defined in:	lib/bundler/vendor/thor/lib/thor/shell/basic.rb

Class Method Summary

.new ⇒ Basic constructor Internal use only

Initialize base, mute and padding to nil.

Instance Attribute Summary

#base rw
#mute readonly

Mute everything that’s inside given block.
#mute? ⇒ Boolean readonly

Check if base is muted.
#padding rw
#padding=(value) rw

Sets the output padding, not allowing less than zero values.
#can_display_colors? ⇒ Boolean readonly protected
#unix? ⇒ Boolean readonly protected
#quiet? ⇒ Boolean readonly protected Internal use only

Instance Method Summary

#ask(statement, *args)

Asks something to the user and receives a response.
#error(statement)

Called if something goes wrong during the execution.
#file_collision(destination)

Deals with file collision and returns true if the file should be overwritten and false otherwise.
#indent(count = 1)

Sets the output padding while executing a block and resets it.
#no?(statement, color = nil) ⇒ Boolean

Make a question the to user and returns true if the user replies “n” or “no”.
#print_in_columns(array)

Prints values in columns.
#print_table(array, options = {})

Prints a table.
#print_wrapped(message, options = {})

Prints a long string, word-wrapping the text to the current width of the terminal display.
#say(message = "", color = nil, force_new_line = (message.to_s !~ /( |\t)\Z/))

Say (print) something to the user.
#say_status(status, message, log_status = true)

Say a status with the given color and appends the message.
#terminal_width

This code was copied from Rake, available under MIT-LICENSE Copyright © 2003, 2004 Jim Weirich.
#yes?(statement, color = nil) ⇒ Boolean

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

See additional method definition at line 394.
#ask_filtered(statement, color, options) protected
#ask_simply(statement, color, options) protected
#dynamic_width protected

Calculate the dynamic width of the terminal.
#dynamic_width_stty protected
#dynamic_width_tput protected
#lookup_color(color) protected
#prepare_message(message, *color) protected
#stderr protected
#stdout protected
#truncate(string, width) protected
#set_color(string) Internal use only

Apply color to the given string with optional bold.
#file_collision_help protected Internal use only
#is?(value) ⇒ Boolean protected Internal use only
#show_diff(destination, content) protected Internal use only

Constructor Details

.new ⇒ `Basic`

This method is for internal use only.

Initialize base, mute and padding to nil.

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 9


def initialize #:nodoc:
  @base = nil
  @mute = false
  @padding = 0
  @always_force = false
end

Instance Attribute Details

#base (rw)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 4


attr_accessor :base

#can_display_colors? ⇒ `Boolean` (readonly, protected)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 312


def can_display_colors?
  false
end

#mute (readonly)

Mute everything that’s inside given block

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 18


def mute
  @mute = true
  yield
ensure
  @mute = false
end

#mute? ⇒ `Boolean` (readonly)

Check if base is muted

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 27


def mute?
  @mute
end

#padding (rw)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 5


attr_reader   :padding

#padding=(value) (rw)

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

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 33


def padding=(value)
  @padding = [0, value].max
end

#quiet? ⇒ `Boolean` (readonly, protected)

This method is for internal use only.

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 361


def quiet? #:nodoc:
  mute? || (base && base.options[:quiet])
end

#unix? ⇒ `Boolean` (readonly, protected)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 378


def unix?
  RUBY_PLATFORM =~ /(aix|darwin|linux|(net|free|open)bsd|cygwin|solaris|irix|hpux)/i
end

Instance Method Details

#as_unicode (protected)

See additional method definition at line 394.

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 398


def as_unicode
  yield
end

#ask(statement, *args)

Asks something to the user and receives a response.

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 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)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 70


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

#ask_filtered(statement, color, options) (protected)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 424


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) (protected)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 407


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

#dynamic_width (protected)

Calculate the dynamic width of the terminal

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 366


def dynamic_width
  @dynamic_width ||= (dynamic_width_stty.nonzero? || dynamic_width_tput)
end

#dynamic_width_stty (protected)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 370


def dynamic_width_stty
  `stty size 2>/dev/null`.split[1].to_i
end

#dynamic_width_tput (protected)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 374


def dynamic_width_tput
  `tput cols 2>/dev/null`.to_i
end

#error(statement)

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.

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 294


def error(statement)
  stderr.puts statement
end

#file_collision(destination)

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

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 244


def file_collision(destination)
  return true if @always_force
  options = block_given? ? "[Ynaqdh]" : "[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..."
    else
      say file_collision_help
    end
  end
end

#file_collision_help (protected)

This method is for internal use only.

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 339


def file_collision_help #:nodoc:
  <<-HELP
  Y - yes, overwrite
  n - no, do not overwrite
  a - all, overwrite this and all others
  q - quit, abort
  d - diff, show the differences between the old and the new
  h - help, show this help
  HELP
end

#indent(count = 1)

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

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 39


def indent(count = 1)
  orig_padding = padding
  self.padding = padding + count
  yield
  self.padding = orig_padding
end

#is?(value) ⇒ `Boolean` (protected)

This method is for internal use only.

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 329


def is?(value) #:nodoc:
  value = value.to_s

  if value.size == 1
    /\A#{value}\z/i
  else
    /\A(#{value}|#{value[0, 1]})\z/i
  end
end

#lookup_color(color) (protected)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 316


def lookup_color(color)
  return color unless color.is_a?(Symbol)
  self.class.const_get(color.to_s.upcase)
end

#no?(statement, color = nil) ⇒ `Boolean`

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

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 126


def no?(statement, color = nil)
  !!(ask(statement, color, :add_to_history => false) =~ is?(:no))
end

#prepare_message(message, *color) (protected)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 307


def prepare_message(message, *color)
  spaces = "  " * padding
  spaces + set_color(message.to_s, *color)
end

#print_in_columns(array)

Prints values in columns

Parameters

Array[String, String, …]

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 135


def print_in_columns(array)
  return if array.empty?
  colwidth = (array.map { |el| el.to_s.size }.max || 0) + 2
  array.each_with_index do |value, index|
    # Don't output trailing spaces when printing the last column
    if ((((index + 1) % (terminal_width / colwidth))).zero? && !index.zero?) || index + 1 == array.length
      stdout.puts value
    else
      stdout.printf("%-#{colwidth}s", value)
    end
  end
end

#print_table(array, options = {})

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.

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 157


def print_table(array, options = {}) # rubocop:disable MethodLength
  return if array.empty?

  formats = []
  indent = options[:indent].to_i
  colwidth = options[:colwidth]
  options[:truncate] = terminal_width if options[:truncate] == true

  formats << "%-#{colwidth + 2}s".dup if colwidth
  start = colwidth ? 1 : 0

  colcount = array.max { |a, b| a.size <=> b.size }.size

  maximas = []

  start.upto(colcount - 1) do |index|
    maxima = array.map { |row| row[index] ? row[index].to_s.size : 0 }.max
    maximas << maxima
    formats << if index == colcount - 1
                 # Don't output 2 trailing spaces when printing the last column
                 "%-s".dup
               else
                 "%-#{maxima + 2}s".dup
               end
  end

  formats[0] = formats[0].insert(0, " " * indent)
  formats << "%s"

  array.each do |row|
    sentence = "".dup

    row.each_with_index do |column, index|
      maxima = maximas[index]

      f = if column.is_a?(Numeric)
        if index == row.size - 1
          # Don't output 2 trailing spaces when printing the last column
          "%#{maxima}s"
        else
          "%#{maxima}s  "
        end
      else
        formats[index]
      end
      sentence << f % column.to_s
    end

    sentence = truncate(sentence, options[:truncate]) if options[:truncate]
    stdout.puts sentence
  end
end

#print_wrapped(message, options = {})

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.

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 219


def print_wrapped(message, options = {})
  indent = options[:indent] || 0
  width = terminal_width - indent
  paras = message.split("\n\n")

  paras.map! do |unwrapped|
    unwrapped.strip.tr("\n", " ").squeeze(" ").gsub(/.{1,#{width}}(?:\s|\Z)/) { ($& + 5.chr).gsub(/\n\005/, "\n").gsub(/\005/, "\n") }
  end

  paras.each do |para|
    para.split("\n").each do |line|
      stdout.puts line.insert(0, " " * indent)
    end
    stdout.puts unless para == paras.last
  end
end

#say(message = "", color = nil, force_new_line = (message.to_s !~ /( |\t)\Z/))

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.”)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 88


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)

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.

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 101


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

#set_color(string)

This method is for internal use only.

Apply color to the given string with optional bold. Disabled in the Basic class.

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 301


def set_color(string, *) #:nodoc:
  string
end

#show_diff(destination, content) (protected)

This method is for internal use only.

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 350


def show_diff(destination, content) #:nodoc:
  diff_cmd = ENV["THOR_DIFF"] || ENV["RAILS_DIFF"] || "diff -u"

  require "tempfile"
  Tempfile.open(File.basename(destination), File.dirname(destination)) do |temp|
    temp.write content
    temp.rewind
    system %(#{diff_cmd} "#{destination}" "#{temp.path}")
  end
end

#stderr (protected)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 325


def stderr
  $stderr
end

#stdout (protected)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 321


def stdout
  $stdout
end

#terminal_width

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 278


def terminal_width
  result = if ENV["THOR_COLUMNS"]
    ENV["THOR_COLUMNS"].to_i
  else
    unix? ? dynamic_width : 80
  end
  result < 10 ? 80 : result
rescue
  80
end

#truncate(string, width) (protected)

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 382


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

#yes?(statement, color = nil) ⇒ `Boolean`

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

[ GitHub ]

# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 119


def yes?(statement, color = nil)
  !!(ask(statement, color, :add_to_history => false) =~ is?(:yes))
end

Class: Bundler::Thor::Shell::Basic

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new ⇒ Basic

Instance Attribute Details

#base (rw)

#can_display_colors? ⇒ Boolean (readonly, protected)

#mute (readonly)

#mute? ⇒ Boolean (readonly)

#padding (rw)

#padding=(value) (rw)

#quiet? ⇒ Boolean (readonly, protected)

#unix? ⇒ Boolean (readonly, protected)

Instance Method Details

#as_unicode (protected)

#ask(statement, *args)

Example

#ask_filtered(statement, color, options) (protected)

#ask_simply(statement, color, options) (protected)

#dynamic_width (protected)

#dynamic_width_stty (protected)

#dynamic_width_tput (protected)

#error(statement)

#file_collision(destination)

Parameters

#file_collision_help (protected)

#indent(count = 1)

#is?(value) ⇒ Boolean (protected)

#lookup_color(color) (protected)

#no?(statement, color = nil) ⇒ Boolean

#prepare_message(message, *color) (protected)

#print_in_columns(array)

Parameters

#print_table(array, options = {})

Parameters

Options

#print_wrapped(message, options = {})

Parameters

Options

#say(message = "", color = nil, force_new_line = (message.to_s !~ /( |\t)\Z/))

Example

#say_status(status, message, log_status = true)

#set_color(string)

#show_diff(destination, content) (protected)

#stderr (protected)

#stdout (protected)

#terminal_width

#truncate(string, width) (protected)

#yes?(statement, color = nil) ⇒ Boolean

.new ⇒ `Basic`

#can_display_colors? ⇒ `Boolean` (readonly, protected)

#mute? ⇒ `Boolean` (readonly)

#quiet? ⇒ `Boolean` (readonly, protected)

#unix? ⇒ `Boolean` (readonly, protected)

#is?(value) ⇒ `Boolean` (protected)

#no?(statement, color = nil) ⇒ `Boolean`

#yes?(statement, color = nil) ⇒ `Boolean`