module ActiveSupport class Deprecation module Reporting # Whether to print a message (silent mode) attr_accessor :silenced # Name of gem where method is deprecated attr_accessor :gem_name # Outputs a deprecation warning to the output configured by # ActiveSupport::Deprecation.behavior. # # ActiveSupport::Deprecation.warn('something broke!') # # => "DEPRECATION WARNING: something broke! (called from your_code.rb:1)" def warn(message = nil, callstack = nil) return if silenced callstack ||= caller(2) deprecation_message(callstack, message).tap do |m| behavior.each { |b| b.call(m, callstack) } end end # Silence deprecation warnings within the block. # # ActiveSupport::Deprecation.warn('something broke!') # # => "DEPRECATION WARNING: something broke! (called from your_code.rb:1)" # # ActiveSupport::Deprecation.silence do # ActiveSupport::Deprecation.warn('something broke!') # end # # => nil def silence old_silenced, @silenced = @silenced, true yield ensure @silenced = old_silenced end def deprecation_warning(deprecated_method_name, message = nil, caller_backtrace = nil) caller_backtrace ||= caller(2) deprecated_method_warning(deprecated_method_name, message).tap do |msg| warn(msg, caller_backtrace) end end private # Outputs a deprecation warning message # # ActiveSupport::Deprecation.deprecated_method_warning(:method_name) # # => "method_name is deprecated and will be removed from Rails #{deprecation_horizon}" # ActiveSupport::Deprecation.deprecated_method_warning(:method_name, :another_method) # # => "method_name is deprecated and will be removed from Rails #{deprecation_horizon} (use another_method instead)" # ActiveSupport::Deprecation.deprecated_method_warning(:method_name, "Optional message") # # => "method_name is deprecated and will be removed from Rails #{deprecation_horizon} (Optional message)" def deprecated_method_warning(method_name, message = nil) warning = "#{method_name} is deprecated and will be removed from #{gem_name} #{deprecation_horizon}" case message when Symbol then "#{warning} (use #{message} instead)" when String then "#{warning} (#{message})" else warning end end def deprecation_message(callstack, message = nil) message ||= "You are using deprecated behavior which will be removed from the next major or minor release." message += '.' unless message =~ /\.$/ "DEPRECATION WARNING: #{message} #{deprecation_caller_message(callstack)}" end def deprecation_caller_message(callstack) file, line, method = extract_callstack(callstack) if file if line && method "(called from #{method} at #{file}:#{line})" else "(called from #{file}:#{line})" end end end def extract_callstack(callstack) rails_gem_root = File.expand_path("../../../../..", __FILE__) + "/" offending_line = callstack.find { |line| !line.start_with?(rails_gem_root) } || callstack.first if offending_line if md = offending_line.match(/^(.+?):(\d+)(?::in `(.*?)')?/) md.captures else offending_line end end end end end end