Methods
C
Constants
SYS_KEYS = RbConfig::CONFIG.keys.grep(/(prefix|libdir)/)
 
SYS_PATHS = RbConfig::CONFIG.values_at(*SYS_KEYS).uniq + [ File.join(File.dirname(__FILE__), "..") ]
 
SUPPRESSED_PATHS = SYS_PATHS. map { |s| s.gsub("\\", "/") }. map { |f| File.expand_path(f) }. reject { |s| s.nil? || s =~ /^ *$/ }
 
SUPPRESSED_PATHS_RE = SUPPRESSED_PATHS.map { |f| Regexp.quote(f) }.join("|")
 
SUPPRESS_PATTERN = %r!(\A(#{SUPPRESSED_PATHS_RE})|bin/rake:\d+)!i
 
Class Public methods
collapse(backtrace)

Source: show 

# File lib/rake/backtrace.rb, line 14
def self.collapse(backtrace)
  pattern = Rake.application.options.suppress_backtrace_pattern ||
            SUPPRESS_PATTERN
  backtrace.reject { |elem| elem =~ pattern }
end