class RSpec::Core::BacktraceCleaner

def exclude?(line)
  @inclusion_patterns.none? {|p| line =~ p} and matches_an_exclusion_pattern?(line)
end

def full_backtrace=(true_or_false)
  @exclusion_patterns = true_or_false ? [] : DEFAULT_EXCLUSION_PATTERNS.dup
end

def full_backtrace?
  @exclusion_patterns.empty?
end

def initialize(inclusion_patterns=nil, exclusion_patterns=DEFAULT_EXCLUSION_PATTERNS.dup)
  @exclusion_patterns = exclusion_patterns
  if inclusion_patterns.nil?
    @inclusion_patterns = (matches_an_exclusion_pattern? Dir.getwd) ? [Regexp.new(Dir.getwd)] : []
  else
    @inclusion_patterns = inclusion_patterns
  end
end

def matches_an_exclusion_pattern?(line)
  @exclusion_patterns.any? {|p| line =~ p}
end