Seed Ansible Roles for Vmdb Plugins

Allow plugins to add a requirements.yml file to specify roles from
galaxy/github/etc... and seed them locally.

lib/tasks/evm_ansible.rake

@@ -0,0 +1,31 @@
+require 'awesome_spawn'
+require "vmdb/plugins"
+
+namespace :evm do
+  namespace :ansible do
+    desc "Seed galaxy roles for provider playbooks"
+    task :seed do
+      plugins_with_req_yml = Vmdb::Plugins.select do |p|
+        req_yml_path = p.root.join('content', 'ansible', 'requirements.yml')
+        File.file?(req_yml_path)
+      end
+
+      plugins_with_req_yml.each do |p|
+        puts "Seeding roles for #{p.name.split("::Engine").first}..."
+
+        roles_path = p.root.join('content', 'ansible', 'roles')
+        role_file  = p.root.join('content', 'ansible', 'requirements.yml')
+
+        AwesomeSpawn.run!(
+          "ansible-galaxy",
+          :params => {
+            nil          => "install",
+            :roles_path= => roles_path,
+            :role_file=  => role_file
+          }
+        )
+        puts "Seeding roles for #{p.name.split("::Engine").first}...Complete"
+      end
+    end
+  end
+end