fix hooks to not require APPLIANCES_ENVIRONMENT_ROOT env var

Author: sjpb

ansible/site.yml

@@ -2,7 +2,8 @@
 
 - name: Run pre.yml hook
   vars:
-    appliances_environment_root: "{{ lookup('env', 'APPLIANCES_ENVIRONMENT_ROOT') }}"
+    # hostvars not available here, so have to recalculate environment root:
+    appliances_environment_root: "{{ ansible_inventory_sources | last | dirname }}"
     hook_path: "{{ appliances_environment_root }}/hooks/pre.yml"
   import_playbook: "{{ hook_path if hook_path | exists else 'noop.yml' }}"
   when: hook_path | exists
@@ -14,7 +15,8 @@
 
 - name: Run post-bootstrap.yml hook
   vars:
-    appliances_environment_root: "{{ lookup('env', 'APPLIANCES_ENVIRONMENT_ROOT') }}"
+    # hostvars not available here, so have to recalculate environment root:
+    appliances_environment_root: "{{ ansible_inventory_sources | last | dirname }}"
     hook_path: "{{ appliances_environment_root }}/hooks/post-bootstrap.yml"
   import_playbook: "{{ hook_path if hook_path | exists else 'noop.yml' }}"
   when: hook_path | exists
@@ -28,7 +30,8 @@
 
 - name: Run post.yml hook
   vars:
-    appliances_environment_root: "{{ lookup('env', 'APPLIANCES_ENVIRONMENT_ROOT') }}"
+    # hostvars not available here, so have to recalculate environment root:
+    appliances_environment_root: "{{ ansible_inventory_sources | last | dirname }}"
     hook_path: "{{ appliances_environment_root }}/hooks/post.yml"
   import_playbook: "{{ hook_path if hook_path | exists else 'noop.yml' }}"
   when: hook_path | exists

environments/.caas/hooks/pre.yml

@@ -1,5 +1,15 @@
 ---
 
+- name: debug
+  hosts:
+    - localhost
+    - openstack
+  become: no
+  gather_facts: no
+  tasks:
+    - debug:
+        msg: "Starting pre-hook"
+
 # Provision the infrastructure using Terraform
 - name: Provision infrastructure
   hosts: openstack