Merge pull request #30 from mindreframer/apt-cacher

Apt cacher bucket

README.md

@@ -208,6 +208,34 @@ folder under the result of running `rvm info` as the default SSH user (usualy
 it is already installed before enabling the bucket, otherwise you won't benefit
 from this plugin.
 
+
+##### APT-CACHER
+
+```ruby
+Vagrant.configure("2") do |config|
+  config.vm.box = 'some-debian-box'
+  config.cache.enable :apt_cacher
+end
+```
+
+This is useful, if you are using containers inside your VMs, e.g VirtualBox -> LXC. This would allow you to reuse packages without sharing folder inside VirtualBox. Only works with NFS-shared folders (since `vboxsf` is enforcing `vagrant`-user and `apt-cacher` is running under `apt-cacher-ng` user)
+
+    # install apt-cacher on (Host)-VM
+    $ sudo apt-get install apt-cacher-ng
+
+    # get the IP for eth0 interface
+    $ ifconfig eth0 |grep "inet addr"|awk '{print $2}' |cut -c6-20
+
+    # configure mirror on for your docker/LXC instances:
+    $ echo 'Acquire::http { Proxy "http://X.X.X.X:3142"; };' > /etc/apt/apt.conf.d/10mirror
+
+    # check, if working by tailing log on (Host)-VM, while installing packages on (Guest)-VMs
+    $ tail -f /var/log/apt-cacher-ng/apt-cacher.log
+
+
+Used by Debian-like Linux distros, will get configured under guest's `/var/cache/apt-cacher-ng`.
+
+
 ## Finding out disk space used by buckets
 
 _TODO_

lib/vagrant-cachier/bucket.rb

@@ -15,12 +15,12 @@ module VagrantPlugins
       end
 
       def self.bucket_name
-        # TODO: Handle MultiWord bucket classes
-        self.name.split('::').last.downcase
+        class_name = self.name.split('::').last
+        class_name.scan(/[A-Z][a-z]*/).map{|x| x.downcase}.join("_")
       end
 
       def self.install(name, env, configs)
-        bucket = const_get(name.to_s.capitalize)
+        bucket = const_get(name.to_s.split("_").map{|x| x.capitalize}.join(""))
         bucket.new(name, env, configs).install
       end
 
@@ -39,3 +39,4 @@ require_relative "bucket/gem"
 require_relative "bucket/pacman"
 require_relative "bucket/yum"
 require_relative "bucket/rvm"
+require_relative "bucket/apt_cacher"

lib/vagrant-cachier/bucket/apt_cacher.rb

@@ -0,0 +1,35 @@
+# Apt-Cacher NG is a caching proxy for software packages which are downloaded by Unix/Linux system distribution mechanisms from mirror servers accessible via HTTP.
+module VagrantPlugins
+  module Cachier
+    class Bucket
+      class AptCacher < Bucket
+        def self.capability
+          :apt_cacher_dir
+        end
+
+        def install
+          machine = @env[:machine]
+          guest   = machine.guest
+
+          if guest.capability?(:apt_cacher_dir)
+            guest_path = guest.capability(:apt_cacher_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-CACHER cache for a guest machine that does not support it!"
+          end
+        end
+      end
+    end
+  end
+end

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

@@ -0,0 +1,14 @@
+module VagrantPlugins
+  module Cachier
+    module Cap
+      module Debian
+        module AptCacherDir
+          def self.apt_cacher_dir(machine)
+            # cat /etc/apt-cacher-ng/acng.conf |grep CacheDir
+            '/var/cache/apt-cacher-ng'
+          end
+        end
+      end
+    end
+  end
+end

lib/vagrant-cachier/plugin.rb

@@ -36,6 +36,11 @@ module VagrantPlugins
         Cap::Debian::AptCacheDir
       end
 
+      guest_capability 'debian', 'apt_cacher_dir' do
+        require_relative 'cap/debian/apt_cacher_dir'
+        Cap::Debian::AptCacherDir
+      end
+
       guest_capability 'redhat', 'yum_cache_dir' do
         require_relative 'cap/redhat/yum_cache_dir'
         Cap::RedHat::YumCacheDir