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module ActiveSupport
module Deprecation
class << self
attr_accessor :silenced
def warn(message = nil, callstack = caller)
return if silenced
deprecation_message(callstack, message).tap do |m|
behavior.each { |b| b.call(m, callstack) }
end
end
# Silence deprecation warnings within the block.
def silence
old_silenced, @silenced = @silenced, true
yield
ensure
@silenced = old_silenced
end
def deprecated_method_warning(method_name, message = nil)
warning = "#{method_name} is deprecated and will be removed from Rails #{deprecation_horizon}"
case message
when Symbol then "#{warning} (use #{message} instead)"
when String then "#{warning} (#{message})"
else warning
end
end
private
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)
if md = callstack.first.match(/^(.+?):(\d+)(?::in `(.*?)')?/)
md.captures
else
callstack.first
end
end
end
end
end
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