module Chef::Mixin::ConvertToClassName
Public Instance Methods
constantize(camel_cased_word)
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Tries to find a constant with the name specified in the argument string.
'Module'.constantize # => Module 'Test::Unit'.constantize # => Test::Unit
The name is assumed to be the one of a top-level constant, no matter whether it starts with “::” or not. No lexical context is taken into account:
C = 'outside' module M C = 'inside' C # => 'inside' 'C'.constantize # => 'outside', same as ::C end
NameError is raised when the name is not in CamelCase or the constant is unknown.
# File lib/chef/mixin/convert_to_class_name.rb, line 93 def constantize(camel_cased_word) names = camel_cased_word.split("::") # Trigger a built-in NameError exception including the ill-formed constant in the message. Object.const_get(camel_cased_word) if names.empty? # Remove the first blank element in case of '::ClassName' notation. names.shift if names.size > 1 && 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 if it is owned directly. The check # stops when we reach Object or the end of ancestors tree. 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 end
convert_to_class_name(str)
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# File lib/chef/mixin/convert_to_class_name.rb, line 25 def convert_to_class_name(str) str = normalize_snake_case_name(str) rname = nil regexp = %r{^(.+?)(_(.+))?$} mn = str.match(regexp) if mn rname = mn[1].capitalize while mn && mn[3] mn = mn[3].match(regexp) rname << mn[1].capitalize if mn end end rname end
convert_to_snake_case(str, namespace = nil)
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# File lib/chef/mixin/convert_to_class_name.rb, line 43 def convert_to_snake_case(str, namespace = nil) str = str.dup str.sub!(/^#{namespace}(\:\:)?/, "") if namespace str.gsub!(/[A-Z]/) { |s| "_" + s } str.downcase! str.sub!(/^\_/, "") str end
filename_to_qualified_string(base, filename)
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# File lib/chef/mixin/convert_to_class_name.rb, line 64 def filename_to_qualified_string(base, filename) file_base = File.basename(filename, ".rb") str = base.to_s + (file_base == "default" ? "" : "_#{file_base}") normalize_snake_case_name(str) end
normalize_snake_case_name(str)
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# File lib/chef/mixin/convert_to_class_name.rb, line 52 def normalize_snake_case_name(str) str = str.dup str.gsub!(/[^A-Za-z0-9_]/, "_") str.gsub!(/^(_+)?/, "") str end
snake_case_basename(str)
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# File lib/chef/mixin/convert_to_class_name.rb, line 59 def snake_case_basename(str) with_namespace = convert_to_snake_case(str) with_namespace.split("::").last.sub(/^_/, "") end