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 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 bundler/vendor/thor/lib/thor/shell/basic.rb, line 324
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 bundler/vendor/thor/lib/thor/shell/basic.rb, line 267
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 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 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 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 bundler/vendor/thor/lib/thor/shell/basic.rb, line 136
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 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, …]

# File bundler/vendor/thor/lib/thor/shell/basic.rb, line 145
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 = {}) 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.

# File bundler/vendor/thor/lib/thor/shell/basic.rb, line 167
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 = {}) 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.

# File bundler/vendor/thor/lib/thor/shell/basic.rb, line 229
def print_wrapped(message, options = {})
  indent = options[:indent] || 0
  width = terminal_width - indent
  paras = message.split("\n\n")

  paras.map! do |unwrapped|
    words = unwrapped.split(" ")
    counter = words.first.length
    words.inject do |memo, word|
      word = word.gsub(/\n\005/, "\n").gsub(/\005/, "\n")
      counter = 0 if word.include? "\n"
      if (counter + word.length + 1) < width
        memo = "#{memo} #{word}"
        counter += (word.length + 1)
      else
        memo = "#{memo}\n#{word}"
        counter = word.length
      end
      memo
    end
  end.compact!

  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/)) 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 bundler/vendor/thor/lib/thor/shell/basic.rb, line 96
def say(message = "", color = nil, force_new_line = (message.to_s !~ /( |\t)\Z/))
  return if quiet?

  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 bundler/vendor/thor/lib/thor/shell/basic.rb, line 111
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

# File bundler/vendor/thor/lib/thor/shell/basic.rb, line 308
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 bundler/vendor/thor/lib/thor/shell/basic.rb, line 129
def yes?(statement, color = nil)
  !!(ask(statement, color, :add_to_history => false) =~ is?(:yes))
end

Protected Instance Methods

answer_match(possibilities, answer, case_insensitive) click to toggle source

# File bundler/vendor/thor/lib/thor/shell/basic.rb, line 468
def answer_match(possibilities, answer, case_insensitive)
  if case_insensitive
    possibilities.detect{ |possibility| possibility.downcase == answer.downcase }
  else
    possibilities.detect{ |possibility| possibility == answer }
  end
end

as_unicode() { || ... } click to toggle source

# File bundler/vendor/thor/lib/thor/shell/basic.rb, line 425
def as_unicode
  yield
end

ask_filtered(statement, color, options) click to toggle source

# File bundler/vendor/thor/lib/thor/shell/basic.rb, line 455
def ask_filtered(statement, color, options)
  answer_set = options[:limited_to]
  case_insensitive = options.fetch(:case_insensitive, false)
  correct_answer = nil
  until correct_answer
    answers = answer_set.join(", ")
    answer = ask_simply("#{statement} [#{answers}]", color, options)
    correct_answer = answer_match(answer_set, answer, case_insensitive)
    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 bundler/vendor/thor/lib/thor/shell/basic.rb, line 438
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 bundler/vendor/thor/lib/thor/shell/basic.rb, line 342
def can_display_colors?
  false
end

dynamic_width() click to toggle source

Calculate the dynamic width of the terminal

# File bundler/vendor/thor/lib/thor/shell/basic.rb, line 397
def dynamic_width
  @dynamic_width ||= (dynamic_width_stty.nonzero? || dynamic_width_tput)
end

dynamic_width_stty() click to toggle source

# File bundler/vendor/thor/lib/thor/shell/basic.rb, line 401
def dynamic_width_stty
  `stty size 2>/dev/null`.split[1].to_i
end

dynamic_width_tput() click to toggle source

# File bundler/vendor/thor/lib/thor/shell/basic.rb, line 405
def dynamic_width_tput
  `tput cols 2>/dev/null`.to_i
end

lookup_color(color) click to toggle source

# File bundler/vendor/thor/lib/thor/shell/basic.rb, line 346
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 bundler/vendor/thor/lib/thor/shell/basic.rb, line 337
def prepare_message(message, *color)
  spaces = "  " * padding
  spaces + set_color(message.to_s, *color)
end

stderr() click to toggle source

# File bundler/vendor/thor/lib/thor/shell/basic.rb, line 355
def stderr
  $stderr
end

stdout() click to toggle source

# File bundler/vendor/thor/lib/thor/shell/basic.rb, line 351
def stdout
  $stdout
end

truncate(string, width) click to toggle source

# File bundler/vendor/thor/lib/thor/shell/basic.rb, line 413
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 bundler/vendor/thor/lib/thor/shell/basic.rb, line 409
def unix?
  RUBY_PLATFORM =~ /(aix|darwin|linux|(net|free|open)bsd|cygwin|solaris|irix|hpux)/i
end