feat(ansible): add branch reference as variable in gitrepository (#919)

* feat: add branch reference as variable in gitrepository

* Update bootstrap/vars/config.sample.yaml

---------

Co-authored-by: Devin Buhl <onedr0p@users.noreply.github.com>

bootstrap/tasks/validation/github.yaml

@@ -26,3 +26,17 @@
     that: result.json.full_name == bootstrap_github_username + '/' + bootstrap_github_repository_name
     success_msg: Github repo {{ bootstrap_github_username }}/{{ bootstrap_github_repository_name }} exists
     fail_msg: Github repo {{ bootstrap_github_username }}/{{ bootstrap_github_repository_name }} does not exist
+
+- name: Query Github repo branch
+  ansible.builtin.uri:
+    url: https://api.github.com/repos/{{ bootstrap_github_username }}/{{ bootstrap_github_repository_name }}/branches/{{ bootstrap_github_repository_branch | default('main', true) }}
+    timeout: 5
+    return_content: true
+    body_format: json
+  register: result
+
+- name: Check if repo branch exists
+  ansible.builtin.assert:
+    that: result.json.name == bootstrap_github_repository_branch | default('main', true)
+    success_msg: Github repo branch {{ bootstrap_github_repository_branch | default('main', true) }} exists
+    fail_msg: Github repo branch {{ bootstrap_github_repository_branch | default('main', true) }} does not exist

bootstrap/tasks/validation/vars.yaml

@@ -16,6 +16,7 @@
     - bootstrap_cluster_cidr
     - bootstrap_flux_github_webhook_token
     - bootstrap_github_repository_name
+    - bootstrap_github_repository_branch
     - bootstrap_github_username
     - bootstrap_external_ingress_addr
     - bootstrap_internal_ingress_addr