Add wiki refresh command and service updates

ansible/roles/wiki/tasks/main.yml

@@ -2,7 +2,9 @@
   git:
     repo: "{{ courseware_wiki_repo }}"
     dest: "{{ courseware_wiki_repo_dir }}"
-    update: false
+    update: "{{ courseware_wiki_force_update | default(false) | bool }}"
+    force: "{{ courseware_wiki_force_update | default(false) | bool }}"
+  register: courseware_wiki_repo_sync
 
 - name: Check whether wiki referrer policy patch is already applied
   command:
@@ -27,14 +29,21 @@
   args:
     chdir: "{{ courseware_wiki_repo_dir }}"
   when: courseware_wiki_referrer_policy_patch.rc != 0
+  register: courseware_wiki_referrer_policy_apply
+
+- name: Stat wiki Next dependency
+  stat:
+    path: "{{ courseware_wiki_repo_dir }}/node_modules/next/package.json"
+  register: courseware_wiki_next_dependency
 
 - name: Install wiki dependencies with contained Node runtime
   command: npm install
   args:
     chdir: "{{ courseware_wiki_repo_dir }}"
-    creates: "{{ courseware_wiki_repo_dir }}/node_modules/next/package.json"
   environment:
     PATH: "{{ courseware_node_runtime_bin_dir }}:{{ ansible_env.PATH }}"
+  when:
+    - not courseware_wiki_next_dependency.stat.exists or courseware_wiki_repo_sync.changed
 
 - name: Render wiki runtime config
   template:
@@ -54,4 +63,4 @@
   environment:
     PATH: "{{ courseware_node_runtime_bin_dir }}:{{ ansible_env.PATH }}"
   when:
-    - not courseware_wiki_build.stat.exists or courseware_wiki_referrer_policy_patch.rc != 0
+    - not courseware_wiki_build.stat.exists or courseware_wiki_repo_sync.changed or courseware_wiki_referrer_policy_patch.rc != 0