class Hyperloop::Autoloader
Public Class Methods
const_missing(const_name, mod)
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# File lib/hyperloop/autoloader.rb, line 38 def self.const_missing(const_name, mod) # name.nil? is testing for anonymous from_mod = mod.name.nil? ? guess_for_anonymous(const_name) : mod load_missing_constant(from_mod, const_name) end
guess_for_anonymous(const_name)
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# File lib/hyperloop/autoloader.rb, line 44 def self.guess_for_anonymous(const_name) if Object.const_defined?(const_name) raise NameError.new "#{const_name} cannot be autoloaded from an anonymous class or module", const_name else Object end end
history()
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# File lib/hyperloop/autoloader.rb, line 9 def self.history @@history end
history=(a)
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All files ever loaded.
# File lib/hyperloop/autoloader.rb, line 6 def self.history=(a) @@history = a end
load_missing_constant(from_mod, const_name)
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# File lib/hyperloop/autoloader.rb, line 52 def self.load_missing_constant(from_mod, const_name) # see active_support/dependencies.rb in case of reloading on how to handle qualified_name = qualified_name_for(from_mod, const_name) qualified_path = underscore(qualified_name) module_path = search_for_module(qualified_path) if module_path if loading.include?(module_path) raise "Circular dependency detected while autoloading constant #{qualified_name}" else require_or_load(from_mod, module_path) raise LoadError, "Unable to autoload constant #{qualified_name}, expected #{module_path} to define it" unless from_mod.const_defined?(const_name, false) return from_mod.const_get(const_name) end elsif (parent = from_mod.parent) && parent != from_mod && ! from_mod.parents.any? { |p| p.const_defined?(const_name, false) } begin return parent.const_missing(const_name) rescue NameError => e raise unless missing_name?(e, qualified_name_for(parent, const_name)) end end end
load_paths()
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# File lib/hyperloop/autoloader.rb, line 17 def self.load_paths @@load_paths end
load_paths=(a)
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# File lib/hyperloop/autoloader.rb, line 14 def self.load_paths=(a) @@load_paths = a end
loaded()
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# File lib/hyperloop/autoloader.rb, line 25 def self.loaded @@loaded end
loaded=(a)
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# File lib/hyperloop/autoloader.rb, line 22 def self.loaded=(a) @@loaded = a end
loading()
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# File lib/hyperloop/autoloader.rb, line 33 def self.loading @@loading end
loading=(a)
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# File lib/hyperloop/autoloader.rb, line 30 def self.loading=(a) @@loading = a end
missing_name?(e, name)
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# File lib/hyperloop/autoloader.rb, line 76 def self.missing_name?(e, name) mn = if /undefined/ !~ e.message $1 if /((::)?([A-Z]\w*)(::[A-Z]\w*)*)$/ =~ e.message end mn == name end
qualified_name_for(mod, name)
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Returns the constant path for the provided parent and constant name.
# File lib/hyperloop/autoloader.rb, line 84 def self.qualified_name_for(mod, name) mod_name = to_constant_name(mod) mod_name == 'Object' ? name.to_s : "#{mod_name}::#{name}" end
require_or_load(from_mod, module_path)
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# File lib/hyperloop/autoloader.rb, line 89 def self.require_or_load(from_mod, module_path) return if loaded.include?(module_path) loaded << module_path loading << module_path begin result = require module_path rescue Exception loaded.delete module_path raise LoadError, "Unable to autoload: require_or_load #{module_path} failed" ensure loading.pop end # Record history *after* loading so first load gets warnings. history << module_path result # end end
search_for_module(path)
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# File lib/hyperloop/autoloader.rb, line 109 def self.search_for_module(path) # oh my! imagine Bart Simpson, writing on the board: # "javascript is not ruby, javascript is not ruby, javascript is not ruby, ..." # then running home, starting irb, on the fly developing a chat client and opening a session with Homer at his workplace: "Hi Dad ..." load_paths.each do |load_path| mod_path = load_path + '/' + path return mod_path if `Opal.modules.hasOwnProperty(#{mod_path})` end return path if `Opal.modules.hasOwnProperty(#{path})` nil # Gee, I sure wish we had first_match ;-) end
underscore(string)
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# File lib/hyperloop/autoloader.rb, line 134 def self.underscore(string) string.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2').gsub(/([a-z\d])([A-Z])/,'\1_\2').tr("-", "_").downcase end