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

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

Constant Summary

Class Method Summary

  • .new ⇒ Basic constructor Internal use only

    Initialize base, mute and padding to nil.

Instance Attribute Summary

Instance Method Summary

Constructor Details

.newBasic

This method is for internal use only.

Initialize base, mute and padding to nil.

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 11

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

Instance Attribute Details

#base (rw)

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 6

attr_accessor :base

#can_display_colors?Boolean (readonly, protected)

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 360

def can_display_colors?
  false
end

#mute (readonly)

Mute everything that’s inside given block

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 20

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

#mute?Boolean (readonly)

Check if base is muted

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 29

def mute?
  @mute
end

#padding (rw)

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 7

attr_reader   :padding

#padding=(value) (rw)

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

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 35

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

#quiet?Boolean (readonly, protected)

This method is for internal use only.
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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 410

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

#unix?Boolean (readonly, protected)

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 427

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

Instance Method Details

#answer_match(possibilities, answer, case_insensitive) (protected)

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 486

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 (protected)

See additional method definition at line 443.

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 447

def as_unicode
  yield
end

#ask(statement, *args)

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)

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# 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

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

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 473

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) (protected)

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 456

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

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 415

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

#dynamic_width_stty (protected)

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 419

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

#dynamic_width_tput (protected)

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 423

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.

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 342

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 and merge

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 285

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

#file_collision_help (protected)

This method is for internal use only.
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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 387

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
  m - merge, run merge tool
  HELP
end

#git_merge_tool (protected)

This method is for internal use only.
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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 507

def git_merge_tool #:nodoc:
  `git config merge.tool`.rstrip rescue ""
end

#indent(count = 1)

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

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# 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

#is?(value) ⇒ Boolean (protected)

This method is for internal use only.
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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 377

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)

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 364

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

#merge(destination, content) (protected)

This method is for internal use only.
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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 494

def merge(destination, content) #:nodoc:
  require "tempfile"
  Tempfile.open([File.basename(destination), File.extname(destination)], File.dirname(destination)) do |temp|
    temp.write content
    temp.rewind
    system %(#{merge_tool} "#{temp.path}" "#{destination}")
  end
end

#merge_tool (protected)

This method is for internal use only.
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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 503

def merge_tool #:nodoc:
  @merge_tool ||= ENV["THOR_MERGE"] || git_merge_tool
end

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

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

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 154

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

#prepare_message(message, *color) (protected)

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 355

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

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

Say (print) an error 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_error(“error: something went wrong”)

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 113

def say_error(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")

  stderr.print(buffer)
  stderr.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.

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 128

def say_status(status, message, log_status = true)
  return if quiet? || log_status == false
  spaces = "  " * (padding + 1)
  status = status.to_s.rjust(12)
  margin = " " * status.length + spaces

  color  = log_status.is_a?(Symbol) ? log_status : :green
  status = set_color status, color, true if color

  message = message.to_s.chomp.gsub(/(?<!\A)^/, margin)
  buffer = "#{status}#{spaces}#{message}\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.

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 349

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

#show_diff(destination, content) (protected)

This method is for internal use only.
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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 399

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)

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 373

def stderr
  $stderr
end

#stdout (protected)

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 369

def stdout
  $stdout
end

#terminal_width

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

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 326

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

#truncate(string, width) (protected)

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 431

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”.

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# File 'lib/bundler/vendor/thor/lib/thor/shell/basic.rb', line 147

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