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Contents
module MetricFu
module Constantize
# Copied from ActiveSupport and modified so as not to introduce a dependency.
# https://github.com/rails/rails/blob/master/activesupport/lib/active_support/inflector/methods.rb#L220
def constantize(camel_cased_word)
tries ||= 2
names = camel_cased_word.split('::')
names.shift if names.empty? || names.first.empty?
names.inject(Object) do |constant, name|
if constant == Object
constant.const_get(name)
else
candidate = constant.const_get(name)
next candidate if constant.const_defined?(name, false)
next candidate unless Object.const_defined?(name)
# Go down the ancestors to check it it's owned
# directly before we reach Object or the end of ancestors.
constant = constant.ancestors.inject do |const, ancestor|
break const if ancestor == Object
break ancestor if ancestor.const_defined?(name, false)
const
end
# owner is in Object, so raise
constant.const_get(name, false)
end
end
rescue NameError
# May need to attempt to require the file and try again.
begin
require underscore(camel_cased_word)
rescue LoadError => e
mf_log e.message
end
if (tries -= 1).zero?
raise
else
retry
end
end
# Copied from active_support
# https://github.com/rails/rails/blob/51cd6bb829c418c5fbf75de1dfbb177233b1b154/activesupport/lib/active_support/inflector/methods.rb#L88
def underscore(camel_cased_word)
word = camel_cased_word.to_s.dup
word.gsub!(/::/, '/')
word.gsub!(/([A-Z]+)([A-Z][a-z])/,'\1_\2')
word.gsub!(/([a-z\d])([A-Z])/,'\1_\2')
word.tr!("-", "_")
word.downcase!
word
end
end
end
Version data entries
22 entries across 22 versions & 1 rubygems