Look ma, first public release and no specs!

.gitignore

@@ -0,0 +1,17 @@
+*.gem
+*.rbc
+.bundle
+.config
+.yardoc
+InstalledFiles
+_yardoc
+coverage
+doc/
+lib/bundler/man
+pkg
+rdoc
+spec/reports
+test/tmp
+test/version_tmp
+tmp
+.vagrant

CHANGELOG.md

@@ -0,0 +1 @@
+# 0.0.2 Initial release

Gemfile

@@ -0,0 +1,10 @@
+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in vagrant-cachier.gemspec
+gemspec
+
+group :development do
+  gem 'vagrant',     github: 'mitchellh/vagrant'
+  gem 'vagrant-lxc', github: 'fgrehm/vagrant-lxc'
+  gem 'rake'
+end

Gemfile.lock

@@ -0,0 +1,47 @@
+GIT
+  remote: git://github.com/fgrehm/vagrant-lxc.git
+  revision: 2f88a060c911c466d304768dd349708336f8af1c
+  specs:
+    vagrant-lxc (0.3.4)
+
+GIT
+  remote: git://github.com/mitchellh/vagrant.git
+  revision: ccfd321ef98dc5c12b180cc3a26f12d870c0eff5
+  specs:
+    vagrant (1.2.3.dev)
+      childprocess (~> 0.3.7)
+      erubis (~> 2.7.0)
+      i18n (~> 0.6.0)
+      json (>= 1.5.1, < 1.8.0)
+      log4r (~> 1.1.9)
+      net-scp (~> 1.1.0)
+      net-ssh (~> 2.6.6)
+
+PATH
+  remote: .
+  specs:
+    vagrant-cachier (0.0.6)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    childprocess (0.3.9)
+      ffi (~> 1.0, >= 1.0.11)
+    erubis (2.7.0)
+    ffi (1.8.1)
+    i18n (0.6.4)
+    json (1.7.7)
+    log4r (1.1.10)
+    net-scp (1.1.0)
+      net-ssh (>= 2.6.5)
+    net-ssh (2.6.7)
+    rake (10.0.4)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  rake
+  vagrant!
+  vagrant-cachier!
+  vagrant-lxc!

LICENSE.txt

@@ -0,0 +1,22 @@
+Copyright (c) 2013 Fabio Rehm
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -0,0 +1,203 @@
+# vagrant-cachier
+
+A [Vagrant](http://www.vagrantup.com/) plugin that helps you reduce the amount of
+coffee you drink while waiting for boxes to be provisioned by sharing a common
+package cache among similiar VM instances. Kinda like [vagrant-apt_cache](https://github.com/avit/vagrant-apt_cache)
+or [this magical snippet](http://gist.github.com/juanje/3797297) but targetting
+multiple package managers and Linux distros.
+
+
+## Installation
+
+Make sure you have Vagrant 1.2+ and run:
+
+```
+vagrant plugin install vagrant-cachier
+```
+
+## Usage
+
+The easiest way to set things up is just to enable [cache buckets auto detection](#auto-detect-supported-cache-buckets)
+from within your `Vagrantfile`:
+
+```ruby
+Vagrant.configure("2") do |config|
+  config.vm.box = 'your-box'
+  config.cache.auto_detect = true
+end
+```
+
+For more information about available buckets, please see the [configuration section](#configurations) below.
+
+
+## Compatible providers
+
+* Vagrant's built in VirtualBox provider
+* [vagrant-lxc](https://github.com/fgrehm/vagrant-lxc)
+
+_It is possibly compatible with the [VMware providers](http://www.vagrantup.com/vmware)
+as well but I haven't tried yet._
+
+
+## How does it work?
+
+Right now the plugin does not make any assumptions for you and you have to
+configure things properly from your `Vagrantfile`. Please have a look at
+the [available cache buckets](#available-cache-buckets) section below for more
+information.
+
+Under the hood, the plugin will hook into calls to `Vagrant::Builtin::Provision`
+during `vagrant up` / `vagrant reload` and will set things up for each configured
+cache bucket. Before halting the machine, it will revert the changes required
+to set things up by hooking into calls to `Vagrant::Builtin::GracefulHalt` so
+that you can repackage the machine for others to use without requiring users to
+install the plugin as well.
+
+Cache buckets will be available from `/tmp/vagrant-cachier` on your guest and
+the appropriate folders will get symlinked to the right path _after_ the machine is
+up but _right before_ it gets provisioned. We _could_ potentially do it on one go
+and share bucket's folders directly to the right path if we were only using VirtualBox
+since it shares folders _after_ booting the machine, but the LXC provider does that
+_as part of_ the boot process (shared folders are actually `lxc-start` parameters)
+and as of now we are not able to get some information that this plugin requires
+about the guest machine before it is actually up and running.
+
+Please keep in mind that this plugin won't do magic, if you are compiling things
+during provisioning or manually downloading packages that does not fit into a
+"cache bucket" you won't see that much of improvement.
+
+
+## Configurations
+
+### Auto detect supported cache buckets
+
+As described on the usage section above, you can enable automatic detection of
+supported [cache "buckets"](#available-cache-buckets) by adding the code below to
+your `Vagrantfile`:
+
+```ruby
+Vagrant.configure("2") do |config|
+  # ...
+  config.cache.auto_detect = true
+end
+```
+
+This will make vagrant-cachier do its best to find out what is supported on the
+guest machine and will set buckets accordingly.
+
+### Cache scope
+
+By default downloaded packages will get stored on a folder scoped to base boxes
+under your `$HOME/.vagrant.d/cache`. The idea is to leverage the cache by allowing
+downloaded packages to be reused across projects. So, if your `Vagrantfile` has
+something like:
+
+```ruby
+Vagrant.configure("2") do |config|
+  config.vm.box = 'some-box'
+end
+```
+
+The cached files will be stored under `$HOME/.vagrant.d/cache/some-box`.
+
+If you are on a [multi VM environment](http://docs.vagrantup.com/v2/multi-machine/index.html),
+there is a huge chance that you'll end up having issues by sharing the same bucket
+across different machines. For example, if you `apt-get install` from two machines
+at "almost the same time" you are probably going to hit a `SystemError: Failed to lock /var/cache/apt/archives/lock`.
+To work around that, you can set the scope to be based on machines:
+
+```ruby
+Vagrant.configure("2") do |config|
+  config.vm.box = 'some-box'
+  config.cache.scope = :machine
+end
+```
+
+This will tell vagrant-cachier to download packages to `.vagrant/machines/<machine-name>/<provider-name>/cache`
+on your current project directory.
+
+
+### Available cache "buckets"
+
+#### System package managers
+
+##### APT
+
+```ruby
+Vagrant.configure("2") do |config|
+  config.vm.box = 'some-debian-box'
+  config.cache.enable :apt
+end
+```
+
+Used by Debian-like Linux distros, will get configured under guest's `/var/cache/apt/archives`.
+
+_Please note that to avoid re-downloading packages, you should avoid `apt-get clean`
+as much as possible in order to make a better use of the cache, even if you are
+packaging a box_
+
+##### Yum
+
+```ruby
+Vagrant.configure("2") do |config|
+  config.vm.box = 'some-centos-box'
+  config.cache.enable :yum
+end
+```
+
+Used by CentOS guests, will get configured under guest's `/var/cache/yum`. It will
+also [make sure](lib/vagrant-cachier/bucket/yum.rb#L20) that `keepcache` is set to
+`1` on guest's `/etc/yum.conf`.
+
+##### Pacman
+
+```ruby
+Vagrant.configure("2") do |config|
+  config.vm.box = 'some-arch-linux-box'
+  config.cache.enable :pacman
+end
+```
+
+Used by Arch Linux, will get configured under guest's `/var/cache/pacman/pkg`.
+
+#### RubyGems
+
+```ruby
+Vagrant.configure("2") do |config|
+  config.vm.box = 'some-box-with-ruby-installed'
+  config.cache.enable :gem
+end
+```
+
+Compatible with probably with any type of guest distro, will hook into the `cache`
+folder under the result of running `gem env gemdir` as the default SSH user (usualy
+`vagrant`) on your guest. If you use rbenv / rvm on the guest machine, make sure
+it is already installed before enabling the bucket, otherwise you won't benefit
+from this plugin.
+
+
+## Finding out disk space used by buckets
+
+_TODO_
+
+```shell
+$ vagrant cache stats
+```
+
+
+## Cleaning up cache buckets
+
+_TODO_
+
+```shell
+$ vagrant cache clean apt
+```
+
+
+## Contributing
+
+1. Fork it
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create new Pull Request

Rakefile

@@ -0,0 +1,5 @@
+Dir['./tasks/**/*.rake'].each { |f| load f }
+
+require 'bundler/gem_tasks'
+
+task :ci => ['spec:unit']

development/Vagrantfile

@@ -0,0 +1,52 @@
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+Vagrant.require_plugin 'vagrant-cachier'
+Vagrant.require_plugin 'vagrant-lxc'
+
+Vagrant.configure("2") do |config|
+  config.vm.synced_folder "../", "/vagrant", id: 'vagrant-root'#, nfs: true
+
+  config.cache.scope = :machine
+  config.cache.auto_detect = true
+
+  debian_like_configs = lambda do |debian|
+    debian.vm.provision :shell, inline: '
+      if ! (which bundle > /dev/null); then
+        sudo gem install bundler --no-ri --no-rdoc
+        sudo apt-get install -y build-essential libffi-dev ruby1.9.1-dev git
+        cd /vagrant && bundle
+      fi'
+  end
+
+  config.vm.define :ubuntu do |ubuntu|
+    ubuntu.vm.box = "quantal64"
+    debian_like_configs.call ubuntu
+  end
+
+  config.vm.define :debian do |debian|
+    debian.vm.box     = "squeeze64"
+    debian.vm.box_url = 'http://f.willianfernandes.com.br/vagrant-boxes/DebianSqueeze64.box'
+    debian_like_configs.call debian
+  end
+
+  config.vm.define :centos do |centos|
+    centos.vm.box     = 'centos6_64'
+    centos.vm.box_url = 'http://developer.nrel.gov/downloads/vagrant-boxes/CentOS-6.4-x86_64-v20130309.box'
+    centos.vm.provision :shell, inline: '
+      if ! (which bundle > /dev/null); then
+        time sudo gem install bundler --no-ri --no-rdoc
+        time sudo yum install -y libffi-devel ruby-devel git
+      fi'
+  end
+
+  config.vm.define :arch do |arch|
+    arch.vm.box     = 'arch64'
+    arch.vm.box_url = 'http://vagrant.pouss.in/archlinux_2012-07-02.box'
+    arch.vm.provision :shell, inline: '
+      if ! (which bundle > /dev/null); then
+        time sudo gem install bundler --no-ri --no-rdoc
+        time sudo pacman -Syu --noconfirm libffi git
+      fi'
+  end
+end

lib/vagrant-cachier.rb

@@ -0,0 +1,4 @@
+require 'vagrant'
+
+require "vagrant-cachier/version"
+require "vagrant-cachier/plugin"

lib/vagrant-cachier/action.rb

@@ -0,0 +1,89 @@
+require_relative 'bucket'
+
+module Vagrant
+  module Cachier
+    class Action
+      class Install
+        def initialize(app, env)
+          @app    = app
+          @logger = Log4r::Logger.new("vagrant::cachier::action::install")
+        end
+
+        def call(env)
+          return @app.call(env) unless env[:machine].config.cache.enabled?
+
+          @env = env
+
+          FileUtils.mkdir_p(cache_root.to_s) unless cache_root.exist?
+
+          env[:machine].config.vm.synced_folder cache_root, '/tmp/vagrant-cache', id: "vagrant-cache"
+
+          @app.call env
+
+          env[:cache_dirs] = []
+
+          if env[:machine].config.cache.auto_detect
+            Bucket.auto_detect(env)
+          end
+
+          if env[:machine].config.cache.buckets.any?
+            env[:ui].info 'Configuring cache buckets...'
+            cache_config = env[:machine].config.cache
+            cache_config.buckets.each do |bucket_name, configs|
+              @logger.debug "Installing #{bucket_name} with configs #{configs.inspect}"
+              Bucket.install(bucket_name, env, configs)
+            end
+
+            data_file = env[:machine].data_dir.join('cache_dirs')
+            data_file.open('w') { |f| f.print env[:cache_dirs].join("\n") }
+          end
+        end
+
+        def cache_root
+          @cache_root ||= case @env[:machine].config.cache.scope
+            when :box
+              @env[:home_path].join('cache', @env[:machine].box.name)
+            when :machine
+              @env[:machine].data_dir.join('cache')
+            else
+              raise "Unknown cache scope: '#{@env[:machine].config.cache.scope}'"
+          end
+        end
+      end
+
+      class Clean
+        def initialize(app, env)
+          @app    = app
+          @logger = Log4r::Logger.new("vagrant::cachier::action::clean")
+        end
+
+        def call(env)
+          @env = env
+
+          if env[:machine].state.id == :running && symlinks.any?
+            env[:ui].info 'Removing cache buckets symlinks...'
+            symlinks.each do |symlink|
+              remove_symlink symlink
+            end
+
+            File.delete env[:machine].data_dir.join('cache_dirs').to_s
+          end
+
+          @app.call env
+        end
+
+        def symlinks
+          # TODO: Check if file exists instead of a blank rescue
+          @symlinks ||= @env[:machine].data_dir.join('cache_dirs').read.split rescue []
+        end
+
+        def remove_symlink(symlink)
+          if @env[:machine].communicate.test("test -L #{symlink}")
+            @logger.debug "Removing symlink for '#{symlink}'"
+            @env[:machine].communicate.sudo("unlink #{symlink}")
+          end
+        end
+      end
+    end
+  end
+end

lib/vagrant-cachier/bucket.rb

@@ -0,0 +1,39 @@
+module Vagrant
+  module Cachier
+    class Bucket
+      def self.inherited(base)
+        @buckets ||= []
+        @buckets << base
+      end
+
+      def self.auto_detect(env)
+        @buckets.each do |bucket|
+          if env[:machine].guest.capability?(bucket.capability)
+            env[:machine].config.cache.enable bucket.bucket_name
+          end
+        end
+      end
+
+      def self.bucket_name
+        # TODO: Handle MultiWord bucket classes
+        self.name.split('::').last.downcase
+      end
+
+      def self.install(name, env, configs)
+        bucket = const_get(name.to_s.capitalize)
+        bucket.new(name, env, configs).install
+      end
+
+      def initialize(name, env, configs)
+        @name    = name
+        @env     = env
+        @configs = configs
+      end
+    end
+  end
+end
+
+require_relative "bucket/apt"
+require_relative "bucket/gem"
+require_relative "bucket/pacman"
+require_relative "bucket/yum"

lib/vagrant-cachier/bucket/apt.rb

@@ -0,0 +1,34 @@
+module Vagrant
+  module Cachier
+    class Bucket
+      class Apt < Bucket
+        def self.capability
+          :apt_cache_dir
+        end
+
+        def install
+          machine = @env[:machine]
+          guest   = machine.guest
+
+          if guest.capability?(:apt_cache_dir)
+            guest_path = guest.capability(:apt_cache_dir)
+
+            @env[:cache_dirs] << guest_path
+
+            machine.communicate.tap do |comm|
+              comm.execute("mkdir -p /tmp/vagrant-cache/#{@name}")
+              unless comm.test("test -L #{guest_path}")
+                comm.sudo("rm -rf #{guest_path}")
+                comm.sudo("mkdir -p `dirname #{guest_path}`")
+                comm.sudo("ln -s /tmp/vagrant-cache/#{@name} #{guest_path}")
+              end
+            end
+          else
+            # TODO: Raise a better error
+            raise "You've configured an APT cache for a guest machine that does not support it!"
+          end
+        end
+      end
+    end
+  end
+end

lib/vagrant-cachier/bucket/gem.rb

@@ -0,0 +1,39 @@
+module Vagrant
+  module Cachier
+    class Bucket
+      class Gem < Bucket
+        def self.capability
+          :gemdir
+        end
+
+        def install
+          machine = @env[:machine]
+          guest   = machine.guest
+
+          if guest.capability?(:gemdir)
+            if gemdir_path = guest.capability(:gemdir)
+              prefix      = gemdir_path.split('/').last
+              bucket_path = "/tmp/vagrant-cache/#{@name}/#{prefix}"
+              machine.communicate.tap do |comm|
+                comm.execute("mkdir -p #{bucket_path}")
+
+                gem_cache_path = "#{gemdir_path}/cache"
+
+                @env[:cache_dirs] << gem_cache_path
+
+                unless comm.test("test -L #{gem_cache_path}")
+                  comm.sudo("rm -rf #{gem_cache_path}")
+                  comm.sudo("mkdir -p `dirname #{gem_cache_path}`")
+                  comm.sudo("ln -s #{bucket_path} #{gem_cache_path}")
+                end
+              end
+            end
+          else
+            # TODO: Raise a better error
+            raise "You've configured a RubyGems cache for a guest machine that does not support it!"
+          end
+        end
+      end
+    end
+  end
+end

lib/vagrant-cachier/bucket/pacman.rb

@@ -0,0 +1,34 @@
+module Vagrant
+  module Cachier
+    class Bucket
+      class Pacman < Bucket
+        def self.capability
+          :pacman_cache_dir
+        end
+
+        def install
+          machine = @env[:machine]
+          guest   = machine.guest
+
+          if guest.capability?(:pacman_cache_dir)
+            guest_path = guest.capability(:pacman_cache_dir)
+
+            @env[:cache_dirs] << guest_path
+
+            machine.communicate.tap do |comm|
+              comm.execute("mkdir -p /tmp/vagrant-cache/#{@name}")
+              unless comm.test("test -L #{guest_path}")
+                comm.sudo("rm -rf #{guest_path}")
+                comm.sudo("mkdir -p `dirname #{guest_path}`")
+                comm.sudo("ln -s /tmp/vagrant-cache/#{@name} #{guest_path}")
+              end
+            end
+          else
+            # TODO: Raise a better error
+            raise "You've configured a Pacman cache for a guest machine that does not support it!"
+          end
+        end
+      end
+    end
+  end
+end

lib/vagrant-cachier/bucket/yum.rb

@@ -0,0 +1,37 @@
+module Vagrant
+  module Cachier
+    class Bucket
+      class Yum < Bucket
+        def self.capability
+          :yum_cache_dir
+        end
+
+        def install
+          machine = @env[:machine]
+          guest   = machine.guest
+
+          if guest.capability?(:yum_cache_dir)
+            guest_path = guest.capability(:yum_cache_dir)
+
+            @env[:cache_dirs] << guest_path
+
+            machine.communicate.tap do |comm|
+              # Ensure caching is enabled
+              comm.sudo("sed -i 's/keepcache=0/keepcache=1/g' /etc/yum.conf")
+
+              comm.execute("mkdir -p /tmp/vagrant-cache/#{@name}")
+              unless comm.test("test -L #{guest_path}")
+                comm.sudo("rm -rf #{guest_path}")
+                comm.sudo("mkdir -p `dirname #{guest_path}`")
+                comm.sudo("ln -s /tmp/vagrant-cache/#{@name} #{guest_path}")
+              end
+            end
+          else
+            # TODO: Raise a better error
+            raise "You've configured a Yum cache for a guest machine that does not support it!"
+          end
+        end
+      end
+    end
+  end
+end

lib/vagrant-cachier/cap/arch/pacman_cache_dir.rb

@@ -0,0 +1,14 @@
+module Vagrant
+  module Cachier
+    module Cap
+      module Arch
+        module PacmanCacheDir
+          def self.pacman_cache_dir(machine)
+            # TODO: Find out if there is a config file we can read from
+            '/var/cache/pacman/pkg'
+          end
+        end
+      end
+    end
+  end
+end

lib/vagrant-cachier/cap/debian/apt_cache_dir.rb

@@ -0,0 +1,14 @@
+module Vagrant
+  module Cachier
+    module Cap
+      module Debian
+        module AptCacheDir
+          def self.apt_cache_dir(machine)
+            # TODO: Find out if there is a config file we can read from
+            '/var/cache/apt/archives'
+          end
+        end
+      end
+    end
+  end
+end

lib/vagrant-cachier/cap/linux/gemdir.rb

@@ -0,0 +1,20 @@
+module Vagrant
+  module Cachier
+    module Cap
+      module Linux
+        module Gemdir
+          def self.gemdir(machine)
+            gemdir = nil
+            machine.communicate.tap do |comm|
+              return unless comm.test('which gem')
+              comm.execute 'gem env gemdir' do |buffer, output|
+                gemdir = output.chomp if buffer == :stdout
+              end
+            end
+            return gemdir
+          end
+        end
+      end
+    end
+  end
+end

lib/vagrant-cachier/cap/redhat/yum_cache_dir.rb

@@ -0,0 +1,14 @@
+module Vagrant
+  module Cachier
+    module Cap
+      module RedHat
+        module YumCacheDir
+          def self.yum_cache_dir(machine)
+            # TODO: Find out if there is a config file we can read from
+            '/var/cache/yum'
+          end
+        end
+      end
+    end
+  end
+end

lib/vagrant-cachier/config.rb

@@ -0,0 +1,30 @@
+module Vagrant
+  module Cachier
+    class Config < Vagrant.plugin(2, :config)
+      attr_accessor :scope, :auto_detect
+      attr_reader   :buckets
+
+      def initialize
+        @scope       = UNSET_VALUE
+        @auto_detect = UNSET_VALUE
+      end
+
+      def enable(bucket, opts = {})
+        (@buckets ||= {})[bucket] = opts
+      end
+
+      def finalize!
+        return unless enabled?
+
+        @scope       = :box  if @scope == UNSET_VALUE
+        @auto_detect = false if @auto_detect == UNSET_VALUE
+        @buckets     = @buckets ? @buckets.dup : {}
+      end
+
+      def enabled?
+        @enabled ||= @auto_detect != UNSET_VALUE ||
+                     @buckets != nil
+      end
+    end
+  end
+end

lib/vagrant-cachier/plugin.rb

@@ -0,0 +1,46 @@
+module Vagrant
+  module Cachier
+    class Plugin < Vagrant.plugin('2')
+      name 'vagrant-cachier'
+
+      config 'cache' do
+        require_relative "config"
+        Config
+      end
+
+      guest_capability 'linux', 'gemdir' do
+        require_relative 'cap/linux/gemdir'
+        Cap::Linux::Gemdir
+      end
+
+      guest_capability 'debian', 'apt_cache_dir' do
+        require_relative 'cap/debian/apt_cache_dir'
+        Cap::Debian::AptCacheDir
+      end
+
+      guest_capability 'redhat', 'yum_cache_dir' do
+        require_relative 'cap/redhat/yum_cache_dir'
+        Cap::RedHat::YumCacheDir
+      end
+
+      guest_capability 'arch', 'pacman_cache_dir' do
+        require_relative 'cap/arch/pacman_cache_dir'
+        Cap::Arch::PacmanCacheDir
+      end
+
+      install_action_hook = lambda do |hook|
+        require_relative 'action'
+        hook.after Vagrant::Action::Builtin::Provision, Vagrant::Cachier::Action::Install
+      end
+      action_hook 'set-shared-cache-on-machine-up',     :machine_action_up, &install_action_hook
+      action_hook 'set-shared-cache-on-machine-reload', :machine_action_reload, &install_action_hook
+
+      clean_action_hook = lambda do |hook|
+        require_relative 'action'
+        hook.before Vagrant::Action::Builtin::GracefulHalt, Vagrant::Cachier::Action::Clean
+      end
+      action_hook 'remove-guest-symlinks-on-machine-halt',    :machine_action_halt, &clean_action_hook
+      action_hook 'remove-guest-symlinks-on-machine-package', :machine_action_package, &clean_action_hook
+    end
+  end
+end

lib/vagrant-cachier/version.rb

@@ -0,0 +1,5 @@
+module Vagrant
+  module Cachier
+    VERSION = "0.0.6"
+  end
+end

vagrant-cachier.gemspec

@@ -0,0 +1,20 @@
+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'vagrant-cachier/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = "vagrant-cachier"
+  spec.version       = Vagrant::Cachier::VERSION
+  spec.authors       = ["Fabio Rehm"]
+  spec.email         = ["fgrehm@gmail.com"]
+  spec.description   = %q{Speed up vagrant boxes provisioning}
+  spec.summary       = spec.description
+  spec.homepage      = "https://github.com/fgrehm/vagrant-cachier"
+  spec.license       = "MIT"
+
+  spec.files         = `git ls-files`.split($/)
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
+  spec.require_paths = ["lib"]
+end