DCD-686: Rename manifest fetching role to be more descriptive.

roles/load_backup_manifest/tasks/main.yml

@@ -0,0 +1,47 @@
+---
+
+# This role will attempt to fetch and load the backup manifest from a
+# remote HTTP or S3 URL. On successful completion the contents of JSON
+# or YAML document will be in the var `atl_backup_manifest`.
+
+- block:
+
+    - name: Ensure temp directory is present
+      file:
+        path: "{{ atl_installer_temp }}"
+        state: directory
+        mode: 0750
+        owner: "{{ atl_product_user }}"
+        group: "{{ atl_product_user }}"
+      changed_when: false  # For Molecule idempotence check
+
+    - name: Parse the manifest URL
+      set_fact:
+        atl_backup_manifest_url: "{{ atl_backup_manifest_url | urlsplit }}"
+
+    - name: Extract manifest file information
+      set_fact:
+        atl_backup_manifest_bucket: "{{ atl_backup_manifest_url.hostname }}"
+        atl_backup_manifest_path: "{{ atl_backup_manifest_url.path }}"
+        atl_backup_manifest_dest: "{{ atl_installer_temp }}/{{ atl_backup_manifest_url.path | basename }}"
+
+    - name: Fetch the manifest from S3
+      aws_s3:
+        mode: get
+        bucket: "{{ atl_backup_manifest_bucket }}"
+        object: "{{ atl_backup_manifest_path }}"
+        dest: "{{ atl_backup_manifest_dest }}"
+      when: atl_backup_manifest_url.scheme == 's3'
+
+    - name: Fetch the manifest from remote host
+      get_url:
+        url: "{{ atl_backup_manifest_url }}"
+        dest: "{{ atl_backup_manifest_dest }}"
+      when: atl_backup_manifest_url.scheme != 's3'
+
+    - name: Load parameters from manifest
+      include_vars:
+        file: "{{ atl_backup_manifest_dest }}"
+        name: atl_backup_manifest
+
+  when: atl_backup_manifest_url is defined and atl_backup_manifest_url != ''