Make vault_password available to BangsibleInventory.

Both the PlayBook and the Inventory require access to the vault_password
because the Inventory needs it when reading group_vars files
independently of the PlayBook run.

bang/inventory.py

@@ -44,8 +44,11 @@ def get_ansible_groups(group_map):
 
 
 class BangsibleInventory(ansible.inventory.Inventory):
-    def __init__(self, groups, hostvars):
-        super(BangsibleInventory, self).__init__(None)
+    def __init__(self, groups, hostvars, vault_password=None):
+        super(BangsibleInventory, self).__init__(
+                host_list=None,
+                vault_password=vault_password
+                )
         self.groups = get_ansible_groups(groups)
 
         # Prepopulate the cache.  The base Inventory only gathers host vars as

bang/stack.py

@@ -288,6 +288,7 @@ def configure(self):
                     verbose=ansible_verbosity
                     )
 
+            vault_password = ansible_cfg.get(A.ansible.VAULT_PASS)
             extra_kwargs = {
                     'playbook': playbook_path,
 
@@ -300,13 +301,14 @@ def configure(self):
                     # ``host_list`` is used to generate the inventory, but
                     # don't worry, we override the inventory later
                     'host_list': [],
-                    'vault_password': ansible_cfg.get(A.ansible.VAULT_PASS),
+                    'vault_password': vault_password,
                     }
             pb_kwargs.update(extra_kwargs)
             pb = PlayBook(**pb_kwargs)
             inventory = BangsibleInventory(
                     copy.deepcopy(self.groups_and_vars.lists),
                     copy.deepcopy(self.groups_and_vars.dicts),
+                    vault_password=vault_password
                     )
             inventory.set_playbook_basedir(playbook_dir)
             pb.inventory = inventory