class Bundler::PubGrub::FailureWriter

# File bundler/vendor/pub_grub/lib/pub_grub/failure_writer.rb, line 3
def initialize(root)
  @root = root

  # { Incompatibility => Integer }
  @derivations = {}

  # [ [ String, Integer or nil ] ]
  @lines = []

  # { Incompatibility => Integer }
  @line_numbers = {}

  count_derivations(root)
end

# File bundler/vendor/pub_grub/lib/pub_grub/failure_writer.rb, line 18
def write
  return @root.to_s unless @root.conflict?

  visit(@root)

  padding = @line_numbers.empty? ? 0 : "(#{@line_numbers.values.last}) ".length

  @lines.map do |message, number|
    next "" if message.empty?

    lead = number ? "(#{number}) " : ""
    lead = lead.ljust(padding)
    message = message.gsub("\n", "\n" + " " * (padding + 2))
    "#{lead}#{message}"
  end.join("\n")
end