Add SVN provider for downloading dependencies

Git wont allow you to download only one directory from github,
(actually there is a way - with sparse download, but it is complicated),
but svn provides quite simple and user friendly way of downloading directory
from github

resources/lxc_container/meta.yaml

@@ -20,4 +20,9 @@ input:
       value:
     container_name:
       schema: str!
-      value:
+      value:
+    roles:
+      schema: [{value: str}]
+      value:
+        - https://github.com/stackforge/os-ansible-deployment/trunk/playbooks/roles/lxc_container_create
+        - https://github.com/stackforge/os-ansible-deployment/trunk/playbooks/roles/lxc_container_destroy

resources/lxc_host/meta.yaml

@@ -11,4 +11,10 @@ input:
       value:
     ssh_user:
       schema: str!
-      value:
+      value:
+    roles:
+      schema: [{value: str}]
+      value:
+        - https://github.com/stackforge/os-ansible-deployment/trunk/playbooks/roles/lxc_hosts
+        - https://github.com/stackforge/os-ansible-deployment/trunk/playbooks/roles/pip_install
+        - https://github.com/stackforge/os-ansible-deployment/trunk/playbooks/roles/apt_package_pinning

solar/solar/core/handlers/ansible_playbook.py

@@ -9,10 +9,15 @@ import ansible.constants as C
 
 from solar.core.handlers import base
 from solar import errors
+from solar.core.provider import SVNProvider
 
 
 class AnsiblePlaybook(base.BaseHandler):
 
+    def download_roles(self, urls):
+        for url in urls:
+            SVNProvider(url, '/etc/ansible/roles').run()
+
     def action(self, resource, action):
         action_file = os.path.join(
             resource.metadata['actions_path'],
@@ -22,6 +27,9 @@ class AnsiblePlaybook(base.BaseHandler):
         runner_cb = callbacks.PlaybookRunnerCallbacks(stats, verbose=utils.VERBOSITY)
 
         variables = resource.args_dict()
+        if 'roles' in variables:
+            self.download_roles(variables['roles'])
+
         remote_user = variables.get('ssh_user') or C.DEFAULT_REMOTE_USER
         private_key_file = variables.get('ssh_key') or C.DEFAULT_PRIVATE_KEY_FILE
         if variables.get('ip'):

solar/solar/core/provider.py

@@ -103,3 +103,23 @@ class RemoteZipProvider(BaseProvider):
             self.directory = os.path.join(directory, path)
         else:
             self.directory = directory
+
+
+class SVNProvider(BaseProvider):
+    """With git you cant checkout only directory from repo,
+    but with svn you can
+    """
+
+    def __init__(self, url, path='.'):
+        self.url = url
+        self.path = path
+
+    def run(self):
+        if not os.path.exists(self.path):
+            os.makedirs(self.path)
+
+        if not os.path.exists(self.url.rsplit('/', 1)[-1]):
+            fabric.local(
+                'cd {path} && svn checkout {url}'.format(
+                    path=self.path,
+                    url=self.url))