Add patch to fix dependencies handling on custom provider

This patch adds a new Puppet.feature called faraday based on this:
https://projects.puppetlabs.com/issues/14822 , which allows to make
dependencies available during the puppet run to be used by the custom
providers/types without needing successive runs or failing catalog
compilation.

Change-Id: I1f84aa3133605abb38d697c1a593216aafe3e7ef

data/osfamily/RedHat/7.yaml

@@ -2,3 +2,9 @@
 # Repository-based attributes
 midonet::repository::midonet_openstack_repo: 'http://repo.midonet.org/openstack-juno/RHEL'
 midonet::repository::openstack_release: 'juno'
+# Temporary source for faraday package and dependencies until it gets included
+# in EPEL repositories
+midonet::faraday_package: 'ruby193-rubygem-faraday'
+midonet::faraday_url: 'http://yum.theforeman.org/nightly/el7/x86_64/ruby193-rubygem-faraday-0.9.1-1.el7.noarch.rpm'
+midonet::multipart_post_package: 'ruby193-rubygem-multipart-post'
+midonet::multipart_post_url: 'http://yum.theforeman.org/nightly/el7/x86_64/ruby193-rubygem-multipart-post-1.2.0-2.el7.noarch.rpm'

data/osfamily/RedHat/common.yaml

@@ -6,6 +6,8 @@ midonet::repository::midonet_repo: 'http://repo.midonet.org/midonet/v2015.06/RHE
 midonet::repository::midonet_thirdparty_repo: 'http://repo.midonet.org/misc/RHEL'
 midonet::repository::midonet_stage: 'stable'
 midonet::repository::midonet_key_url: 'http://repo.midonet.org/packages.midokura.key'
+midonet::repository::midonet_openstack_repo: 'http://repo.midonet.org/openstack-juno/RHEL'
+midonet::repository::openstack_release: 'juno'
 
 # Midonet Host Agent-based attributes
 midonet::midonet_agent::zk_servers:
@@ -32,3 +34,10 @@ midonet::neutron_plugin::project_id: 'service'
 midonet::cassandra::pid_dir: '/var/run/cassandra'
 midonet::cassandra::conf_dir: '/etc/cassandra/default.conf'
 midonet::cassandra::service_path: '/sbin'
+
+# Temporary source for faraday package and dependencies until it gets included
+# in EPEL repositories
+midonet::faraday_package: 'ruby193-rubygem-faraday'
+midonet::faraday_url: 'http://yum.theforeman.org/nightly/el7/x86_64/ruby193-rubygem-faraday-0.9.1-1.el7.noarch.rpm'
+midonet::multipart_post_package: 'ruby193-rubygem-multipart-post'
+midonet::multipart_post_url: 'http://yum.theforeman.org/nightly/el7/x86_64/ruby193-rubygem-multipart-post-1.2.0-2.el7.noarch.rpm'

lib/puppet/feature/faraday.rb

@@ -0,0 +1 @@
+Puppet.features.add(:faraday, :libs => ["faraday"])

lib/puppet/provider/midonet_host_registry/midonet_api_caller.rb

@@ -3,11 +3,13 @@ if RUBY_VERSION == '1.8.7'
 end
 
 require 'uri'
-require 'faraday'
+require 'faraday' if Puppet.features.faraday?
 require 'json'
 
 Puppet::Type.type(:midonet_host_registry).provide(:midonet_api_caller) do
 
+  confine :feature => :faraday
+
   def create
     define_connection(resource[:midonet_api_url])
     tz = call_get_tunnelzone()

manifests/init.pp

@@ -64,14 +64,31 @@ class midonet {
     # Add midonet-cli
     class {'midonet::midonet_cli':}
 
-    if ! defined(Package['faraday']) {
-      package { 'faraday':
-        ensure   => present,
-        provider => 'gem',
-        before   => Midonet_host_registry[$::hostname]
+# TODO(carmela): This workaround has been added in order to be able to handle
+# dependencies on the custom providers. Currently there's no official faraday
+# package for RHEL-based. We are working on getting it included in EPEL repos.
+# Detailed info: https://midonet.atlassian.net/browse/PUP-30
+
+    if ! defined(Package["hiera('midonet::faraday', 'ruby-faraday')"]) {
+      if $::osfamily == 'RedHat' {
+        package { "hiera('midonet::multipart', 'rubygem-multipart-post')":
+          ensure => present,
+          source => "hiera('midonet::multipart_post_url'"
+        } ->
+        package { "hiera('midonet::faraday', 'ruby-faraday')":
+          ensure => present,
+          source => "hiera('midonet::faraday_url')"
+        }
+      }
+      else {
+        package { 'ruby-faraday':
+          ensure => present,
+          before => Midonet_host_registry[$::hostname]
+        }
       }
     }
 
+
     # Register the host
     midonet_host_registry { $::hostname:
       ensure          => present,