Allow changing 'update' and 'force' when cloning repos

Change-Id: I0079deb31a4268fd75c323aff3c4778c7d170053

playbooks/roles/bifrost-create-vm-nodes/defaults/main.yml

@@ -47,6 +47,8 @@ reqs_git_url: https://opendev.org/openstack/requirements
 reqs_git_folder: "{{ git_root }}/requirements"
 reqs_git_branch: "{{ git_branch }}"
 upper_constraints_file: "{{ lookup('env', 'UPPER_CONSTRAINTS_FILE') | default(reqs_git_folder + '/upper-constraints.txt', True) }}"
+update_repos: true
+force_update_repos: true
 
 # Conditional variables utilized based on CI or manual testing options.
 copy_from_local_path: false

playbooks/roles/bifrost-create-vm-nodes/tasks/main.yml

@@ -106,10 +106,10 @@
 - name: download requirements via git
   git:
     dest: "{{ reqs_git_folder }}"
-    force: yes
+    force: "{{ force_update_repos | bool }}"
     repo: "{{ reqs_git_url }}"
     version: "{{ reqs_git_branch }}"
-    update: yes
+    update: "{{ update_repos | bool }}"
     clone: yes
   when: ci_testing_zuul | bool == false and copy_from_local_path | bool == false
 

playbooks/roles/bifrost-prep-for-install/defaults/main.yml

@@ -46,6 +46,9 @@ sushy_git_branch: "{{ git_branch }}"
 ipa_git_branch: "{{ git_branch }}"
 ipa_builder_git_branch: master
 
+update_repos: true
+force_update_repos: true
+
 # Conditional variables utilized based on CI or manual testing options.
 copy_from_local_path: false
 ci_testing_zuul: false

playbooks/roles/bifrost-prep-for-install/tasks/main.yml

@@ -24,10 +24,10 @@
 - name: "Download via GIT"
   git:
     dest: "{{ item.git_folder }}"
-    force: yes
+    force: "{{ force_update_repos | bool }}"
     repo: "{{ item.git_url }}"
     version: "{{ item.git_branch }}"
-    update: yes
+    update: "{{ update_repos | bool }}"
     clone: yes
   with_items: "{{ bifrost_install_sources }}"
   when: ci_testing_zuul | bool == false and copy_from_local_path | bool == false

releasenotes/notes/update-repos-b60563ee51b574fc.yaml

@@ -0,0 +1,10 @@
+---
+features:
+  - |
+    Adds two new parameters for controlling how existing git checkouts are
+    handled:
+
+    * ``update_repos`` can be set to ``false`` to prevent the repositories
+      from being updated.
+    * ``force_update_repos`` can be set to ``false`` to prevent Bifrost from
+      overwriting local changes.