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Merge pull request #1167 from hagenburger/feature/upgrade-hooks-v3

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Feature/upgrade hooks v3
This commit is contained in:
Thomas Reynolds 2014-02-03 15:30:22 -08:00
commit 3b3ed654b7
13 changed files with 11 additions and 504 deletions
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9
middleman-core/lib/middleman-core/application.rb
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@ -14,7 +14,7 @@ require 'active_support/core_ext/integer/inflections'
require 'active_support/core_ext/float/rounding'
# Simple callback library
require 'vendored-middleman-deps/hooks-0.2.0/lib/hooks'
require 'hooks'
# Our custom logger
require 'middleman-core/logger'
@ -32,6 +32,7 @@ module Middleman
# Uses callbacks
include Hooks
include Hooks::InstanceHooks
# Before request hook
define_hook :before
@ -223,6 +224,12 @@ module Middleman
end
alias :inspect :to_s # Ruby 2.0 calls inspect for NoMethodError instead of to_s
# Hooks clones _hooks from the class to the instance.
# https://github.com/apotonick/hooks/blob/master/lib/hooks/instance_hooks.rb#L10
# Middleman expects the same list of hooks for class and instance hooks:
def _hooks
self.class._hooks
end
end
end

2
middleman-core/lib/middleman-more/core_extensions/compass.rb
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@ -49,7 +49,7 @@ class Middleman::CoreExtensions::Compass < ::Middleman::Extension
end
# Call hook
app.run_hook :compass_config, ::Compass.configuration
app.run_hook_for :compass_config, app, ::Compass.configuration
# Tell Tilt to use it as well (for inline sass blocks)
::Tilt.register 'sass', CompassSassTemplate

9
middleman-core/lib/vendored-middleman-deps/hooks-0.2.0/CHANGES.textile
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@ -1,9 +0,0 @@
h2. 0.2.0
h3. Changes
* Callback blocks are now executed on the instance using @instance_exec@. If you need to access the class (former context) use @self.class@.
h2. 0.1.4
h3. Bugfixes
* An uninitialized @inheritable_attr@ doesn't crash since it is not cloned anymore. Note that an uncloneable attribute value still causes an exception.

3
middleman-core/lib/vendored-middleman-deps/hooks-0.2.0/Gemfile
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@ -1,3 +0,0 @@
source :rubygems
gemspec

107
middleman-core/lib/vendored-middleman-deps/hooks-0.2.0/README.rdoc
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@ -1,107 +0,0 @@
= Hooks
<em>Generic hooks with callbacks for Ruby.</em>
== Introduction
_Hooks_ lets you define hooks declaratively in your ruby class. You can add callbacks to your hook, which will be run as soon as _you_ run the hook!
It's almost like ActiveSupport::Callbacks but 76,6% less complex. Instead, it is not more than 60 lines of code, one method compilation, no +method_missing+ and no magic.
Also, you may pass additional arguments to your callbacks when invoking a hook.
== Example
Let's take... a cat.
require 'hooks'
class Cat
include Hooks
define_hook :after_dinner
Now you can add callbacks to your hook declaratively in your class.
after_dinner do
puts "Ice cream for #{self}!"
end
after_dinner :have_a_desert # => refers to Cat#have_a_desert
def have_a_desert
puts "Hell, yeah!"
end
This will run the block and <tt>#have_a_desert</tt> from above.
cat.run_hook :after_dinner
# => Ice cream for #<Cat:0x8df9d84>!
Hell, yeah!
Callback blocks and methods will be executed with instance context. Note how +self+ in the block refers to the Cat instance.
== Inheritance
Hooks are inherited, here's a complete example to put it all together.
class Garfield < Cat
after_dinner :want_some_more
def want_some_more
puts "Is that all?"
end
end
Garfield.new.run_hook :after_dinner
# => Ice cream for #<Cat:0x8df9d84>!
Hell, yeah!
Is that all?
Note how the callbacks are invoked in the order they were inherited.
== Options for Callbacks
You're free to pass any number of arguments to #run_callback, those will be passed to the callbacks.
cat.run_hook :before_dinner, cat, Time.now
The callbacks should be ready for receiving parameters.
before_dinner :wash_pawns
before_dinner do |who, when|
...
end
def wash_pawns(who, when)
Not sure why a cat should have ice cream for dinner. Beside that, I was tempted naming this gem _hooker_.
== Installation
gem install hooks
== Anybody using it?
* Hooks is already used in [Apotomo:http://github.com/apotonick/apotomo], a hot widget framework for Rails. Look at +lib/apotomo/widget.rb+ for examples and into +lib/apotomo/tree_node.rb+ to learn how modules-driven code might benefit from hooks.
== Similar libraries
* http://github.com/nakajima/aspectory
* http://github.com/auser/backcall
* http://github.com/mmcgrana/simple_callbacks
== License
Copyright (c) 2010, Nick Sutterer
Released under the MIT License.

12
middleman-core/lib/vendored-middleman-deps/hooks-0.2.0/Rakefile
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@ -1,12 +0,0 @@
require 'rake'
require 'rake/testtask'
desc 'Default: run unit tests.'
task :default => :test
desc 'Test the hooks plugin.'
Rake::TestTask.new(:test) do |test|
test.libs << 'test'
test.test_files = FileList['test/*_test.rb']
test.verbose = true
end

22
middleman-core/lib/vendored-middleman-deps/hooks-0.2.0/hooks.gemspec
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@ -1,22 +0,0 @@
lib = File.expand_path('../lib/', __FILE__)
$:.unshift lib unless $:.include?(lib)
require 'hooks'
Gem::Specification.new do |s|
s.name = "hooks"
s.version = Hooks::VERSION
s.platform = Gem::Platform::RUBY
s.authors = ["Nick Sutterer"]
s.email = ["apotonick@gmail.com"]
s.homepage = "http://nicksda.apotomo.de/tag/hooks"
s.summary = %q{Generic hooks with callbacks for Ruby.}
s.description = %q{Declaratively define hooks, add callbacks and run them with the options you like.}
s.files = `git ls-files`.split("\n")
s.test_files = `git ls-files -- {test,spec,features}/*`.split("\n")
s.require_paths = ["lib"]
s.add_development_dependency "shoulda"
s.add_development_dependency "rake"
end

109
middleman-core/lib/vendored-middleman-deps/hooks-0.2.0/lib/hooks.rb
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@ -1,109 +0,0 @@
require File.join(File.dirname(__FILE__), "hooks/inheritable_attribute")
# Almost like ActiveSupport::Callbacks but 76,6% less complex.
#
# Example:
#
# class CatWidget < Apotomo::Widget
# define_hook :after_dinner
#
# Now you can add callbacks to your hook declaratively in your class.
#
# after_dinner do puts "Ice cream!" end
# after_dinner :have_a_desert # => refers to CatWidget#have_a_desert
#
# Running the callbacks happens on instances. It will run the block and #have_a_desert from above.
#
# cat.run_hook :after_dinner
module Hooks
VERSION = "0.2.0"
def self.included(base)
base.extend InheritableAttribute
base.extend ClassMethods
end
module ClassMethods
def define_hook(name)
accessor_name = "_#{name}_callbacks"
setup_hook_accessors(accessor_name)
define_hook_writer(name, accessor_name)
end
# Like Hooks#run_hook but for the class. Note that +:callbacks+ must be class methods.
#
# Example:
#
# class Cat
# after_eight :grab_a_beer
#
# def self.grab_a_beer(*) # and so on...
#
# where <tt>Cat.run_hook :after_eight</tt> will call the class method +grab_a_beer+.
def run_hook(name, *args)
run_hook_for(name, self, *args)
end
def run_hook_for(name, scope, *args)
callbacks_for_hook(name).each do |callback|
if callback.kind_of? Symbol
scope.send(callback, *args)
else
scope.instance_exec(*args, &callback)
end
end
end
# Returns the callbacks for +name+. Handy if you want to run the callbacks yourself, say when
# they should be executed in another context.
#
# Example:
#
# def initialize
# self.class.callbacks_for_hook(:after_eight).each do |callback|
# instance_exec(self, &callback)
# end
#
# would run callbacks in the object _instance_ context, passing +self+ as block parameter.
def callbacks_for_hook(name)
send("_#{name}_callbacks")
end
private
def define_hook_writer(hook, accessor_name)
self.send(:define_method, hook.to_sym) do |&block|
if self.class.respond_to?(hook)
self.class.send(hook.to_sym, &block)
end
end
instance_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1
def #{hook}(method=nil, &block)
#{accessor_name} << (block || method)
end
RUBY_EVAL
end
def setup_hook_accessors(accessor_name)
inheritable_attr(accessor_name)
send("#{accessor_name}=", []) # initialize ivar.
end
end
# Runs the callbacks (method/block) for the specified hook +name+. Additional arguments will
# be passed to the callback.
#
# Example:
#
# cat.run_hook :after_dinner, "i want ice cream!"
#
# will invoke the callbacks like
#
# desert("i want ice cream!")
# block.call("i want ice cream!")
def run_hook(name, *args)
self.class.run_hook_for(name, self, *args)
end
end

33
middleman-core/lib/vendored-middleman-deps/hooks-0.2.0/lib/hooks/inheritable_attribute.rb
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@ -1,33 +0,0 @@
module Hooks
module InheritableAttribute
# Creates an inheritable attribute with accessors in the singleton class. Derived classes inherit the
# attributes. This is especially helpful with arrays or hashes that are extended in the inheritance
# chain. Note that you have to initialize the inheritable attribute.
#
# Example:
#
# class Cat
# inheritable_attr :drinks
# self.drinks = ["Becks"]
#
# class Garfield < Cat
# self.drinks << "Fireman's 4"
#
# and then, later
#
# Cat.drinks #=> ["Becks"]
# Garfield.drinks #=> ["Becks", "Fireman's 4"]
def inheritable_attr(name)
instance_eval %Q{
def #{name}=(v)
@#{name} = v
end
def #{name}
return @#{name} unless superclass.respond_to?(:#{name}) and value = superclass.#{name}
@#{name} ||= value.clone # only do this once.
end
}
end
end
end

141
middleman-core/lib/vendored-middleman-deps/hooks-0.2.0/test/hooks_test.rb
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@ -1,141 +0,0 @@
require 'test_helper'
class HooksTest < Test::Unit::TestCase
class TestClass
include Hooks
def executed
@executed ||= [];
end
end
context "Hooks.define_hook" do
setup do
@klass = Class.new(TestClass)
@mum = @klass.new
@mum.class.define_hook :after_eight
end
should "provide accessors to the stored callbacks" do
assert_equal [], @klass._after_eight_callbacks
@klass._after_eight_callbacks << :dine
assert_equal [:dine], @klass._after_eight_callbacks
end
should "respond to Class.callbacks_for_hook" do
assert_equal [], @klass.callbacks_for_hook(:after_eight)
@klass.after_eight :dine
assert_equal [:dine], @klass.callbacks_for_hook(:after_eight)
end
context "creates a public writer for the hook that" do
should "accepts method names" do
@klass.after_eight :dine
assert_equal [:dine], @klass._after_eight_callbacks
end
should "accepts blocks" do
@klass.after_eight do true; end
assert @klass._after_eight_callbacks.first.kind_of? Proc
end
should "be inherited" do
@klass.after_eight :dine
subklass = Class.new(@klass)
assert_equal [:dine], subklass._after_eight_callbacks
end
end
context "Hooks#run_hook" do
should "run without parameters" do
@mum.instance_eval do
def a; executed << :a; nil; end
def b; executed << :b; end
self.class.after_eight :b
self.class.after_eight :a
end
@mum.run_hook(:after_eight)
assert_equal [:b, :a], @mum.executed
end
should "accept arbitrary parameters" do
@mum.instance_eval do
def a(me, arg); executed << arg+1; end
end
@mum.class.after_eight :a
@mum.class.after_eight lambda { |me, arg| me.executed << arg-1 }
@mum.run_hook(:after_eight, @mum, 1)
assert_equal [2, 0], @mum.executed
end
should "execute block callbacks in instance context" do
@mum.class.after_eight { executed << :c }
@mum.run_hook(:after_eight)
assert_equal [:c], @mum.executed
end
end
context "in class context" do
should "run a callback block" do
executed = []
@klass.after_eight do
executed << :klass
end
@klass.run_hook :after_eight
assert_equal [:klass], executed
end
should "run a class methods" do
executed = []
@klass.instance_eval do
after_eight :have_dinner
def have_dinner(executed)
executed << :have_dinner
end
end
@klass.run_hook :after_eight, executed
assert_equal [:have_dinner], executed
end
end
end
context "Deriving" do
setup do
@klass = Class.new(TestClass)
@mum = @klass.new
@mum.class.define_hook :after_eight
end
should "inherit the hook" do
@klass.class_eval do
after_eight :take_shower
def take_shower
executed << :take_shower
end
end
@kid = Class.new(@klass) do
after_eight :have_dinner
def have_dinner
executed << :have_dinner
end
end.new
assert_equal [:take_shower, :have_dinner], @kid.run_hook(:after_eight)
end
end
end

55
middleman-core/lib/vendored-middleman-deps/hooks-0.2.0/test/inheritable_attribute_test.rb
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@ -1,55 +0,0 @@
require 'test_helper'
class HooksTest < Test::Unit::TestCase
context "Hooks.define_hook" do
setup do
@klass = Class.new(Object) do
extend Hooks::InheritableAttribute
end
@mum = @klass.new
@klass.inheritable_attr :drinks
end
should "provide a reader with empty inherited attributes, already" do
assert_equal nil, @klass.drinks
end
should "provide a reader with empty inherited attributes in a derived class" do
assert_equal nil, Class.new(@klass).drinks
#@klass.drinks = true
#Class.new(@klass).drinks # TODO: crashes.
end
should "provide an attribute copy in subclasses" do
@klass.drinks = []
assert @klass.drinks.object_id != Class.new(@klass).drinks.object_id
end
should "provide a writer" do
@klass.drinks = [:cabernet]
assert_equal [:cabernet], @klass.drinks
end
should "inherit attributes" do
@klass.drinks = [:cabernet]
subklass_a = Class.new(@klass)
subklass_a.drinks << :becks
subklass_b = Class.new(@klass)
assert_equal [:cabernet], @klass.drinks
assert_equal [:cabernet, :becks], subklass_a.drinks
assert_equal [:cabernet], subklass_b.drinks
end
should "not inherit attributes if we set explicitely" do
@klass.drinks = [:cabernet]
subklass = Class.new(@klass)
subklass.drinks = [:merlot] # we only want merlot explicitely.
assert_equal [:merlot], subklass.drinks # no :cabernet, here
end
end
end

10
middleman-core/lib/vendored-middleman-deps/hooks-0.2.0/test/test_helper.rb
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@ -1,10 +0,0 @@
require 'rubygems'
# wycats says...
require 'bundler'
Bundler.setup
require 'test/unit'
require 'shoulda'
require 'hooks'
$:.unshift File.dirname(__FILE__) # add current dir to LOAD_PATHS

1
middleman-core/middleman-core.gemspec
View file

@ -22,6 +22,7 @@ Gem::Specification.new do |s|
s.add_dependency("bundler", ["~> 1.1"])
s.add_dependency("rack", [">= 1.4.5"])
s.add_dependency("tilt", ["~> 1.4.1"])
s.add_dependency("hooks", ["~> 0.3"])
# Builder
s.add_dependency("rack-test", ["~> 0.6.1"])