class Bundler::UI::Shell

# File bundler/ui/shell.rb, line 14
def initialize(options = {})
  Thor::Base.shell = options["no-color"] ? Thor::Shell::Basic : nil
  @shell = Thor::Base.shell.new
  @level = ENV["DEBUG"] ? "debug" : "info"
  @warning_history = []
  @output_stream = :stdout
end

# File bundler/ui/shell.rb, line 22
def add_color(string, *color)
  @shell.set_color(string, *color)
end

# File bundler/ui/shell.rb, line 82
def ask(msg)
  @shell.ask(msg)
end

# File bundler/ui/shell.rb, line 32
def confirm(msg = nil, newline = nil)
  return unless confirm?

  tell_me(msg || yield, :green, newline)
end

# File bundler/ui/shell.rb, line 62
def confirm?
  level("confirm")
end

# File bundler/ui/shell.rb, line 52
def debug(msg = nil, newline = nil)
  return unless debug?

  tell_me(msg || yield, nil, newline)
end

# File bundler/ui/shell.rb, line 74
def debug?
  level("debug")
end

# File bundler/ui/shell.rb, line 46
def error(msg = nil, newline = nil, color = :red)
  return unless error?

  tell_err(msg || yield, color, newline)
end

# File bundler/ui/shell.rb, line 70
def error?
  level("error")
end

# File bundler/ui/shell.rb, line 26
def info(msg = nil, newline = nil)
  return unless info?

  tell_me(msg || yield, nil, newline)
end

# File bundler/ui/shell.rb, line 58
def info?
  level("info")
end

# File bundler/ui/shell.rb, line 99
def level(name = nil)
  return @level unless name
  unless index = LEVELS.index(name)
    raise "#{name.inspect} is not a valid level"
  end
  index <= LEVELS.index(@level)
end

# File bundler/ui/shell.rb, line 94
def level=(level)
  raise ArgumentError unless LEVELS.include?(level.to_s)
  @level = level.to_s
end

# File bundler/ui/shell.rb, line 90
def no?(msg)
  @shell.no?(msg)
end

# File bundler/ui/shell.rb, line 107
def output_stream=(symbol)
  raise ArgumentError unless OUTPUT_STREAMS.include?(symbol)
  @output_stream = symbol
end

# File bundler/ui/shell.rb, line 122
def progress(&blk)
  with_output_stream(:stderr, &blk)
end

# File bundler/ui/shell.rb, line 78
def quiet?
  level("quiet")
end

# File bundler/ui/shell.rb, line 118
def silence(&blk)
  with_level("silent", &blk)
end

# File bundler/ui/shell.rb, line 112
def trace(e, newline = nil, force = false)
  return unless debug? || force
  msg = "#{e.class}: #{e.message}\n#{e.backtrace.join("\n  ")}"
  tell_err(msg, nil, newline)
end

# File bundler/ui/shell.rb, line 126
def unprinted_warnings
  []
end

# File bundler/ui/shell.rb, line 38
def warn(msg = nil, newline = nil, color = :yellow)
  return unless warn?
  return if @warning_history.include? msg
  @warning_history << msg

  tell_err(msg || yield, color, newline)
end

# File bundler/ui/shell.rb, line 66
def warn?
  level("warn")
end

# File bundler/ui/shell.rb, line 86
def yes?(msg)
  @shell.yes?(msg)
end

# File bundler/ui/shell.rb, line 159
def strip_leading_spaces(text)
  spaces = text[/\A\s+/, 0]
  spaces ? text.gsub(/#{spaces}/, "") : text
end

# File bundler/ui/shell.rb, line 144
def tell_err(message, color = nil, newline = nil)
  return if @shell.send(:stderr).closed?

  newline = !message.to_s.match?(/( |\t)\Z/) if newline.nil?
  message = word_wrap(message) if newline.is_a?(Hash) && newline[:wrap]

  color = nil if color && !$stderr.tty?

  buffer = @shell.send(:prepare_message, message, *color)
  buffer << "\n" if newline && !message.to_s.end_with?("\n")

  @shell.send(:stderr).print(buffer)
  @shell.send(:stderr).flush
end

# File bundler/ui/shell.rb, line 133
def tell_me(msg, color = nil, newline = nil)
  return tell_err(msg, color, newline) if output_stream == :stderr

  msg = word_wrap(msg) if newline.is_a?(Hash) && newline[:wrap]
  if newline.nil?
    @shell.say(msg, color)
  else
    @shell.say(msg, color, newline)
  end
end

# File bundler/ui/shell.rb, line 170
def with_level(level)
  original = @level
  @level = level
  yield
ensure
  @level = original
end

# File bundler/ui/shell.rb, line 178
def with_output_stream(symbol)
  original = output_stream
  self.output_stream = symbol
  yield
ensure
  @output_stream = original
end

# File bundler/ui/shell.rb, line 164
def word_wrap(text, line_width = Thor::Terminal.terminal_width)
  strip_leading_spaces(text).split("\n").collect do |line|
    line.length > line_width ? line.gsub(/(.{1,#{line_width}})(\s+|$)/, "\\1\n").strip : line
  end * "\n"
end