fetch-translation-output: introduce zuul_use_fetch_output

This change enables using fetch-translation role along with
the fetch-output role. By default the role still synchronizes
artifacts back to the executor.

Change-Id: I85c021706c1fa20f8d28b3a1f56c9435ac3836d5

roles/fetch-translation-output/README.rst

@@ -1 +1,11 @@
 Collect output from a translation build
+
+**Role Variables**
+
+.. zuul:rolevar:: zuul_use_fetch_output
+   :default: false
+
+   Whether to synchronize files to the executor work dir, or to copy them
+   on the test instance.
+   When set to false, the role synchronizes the file to the executor.
+   When set to true, the job needs to use the fetch-output role later.

roles/fetch-translation-output/defaults/main.yaml

@@ -1,3 +1,5 @@
 ---
 zuul_executor_dest: "{{ zuul.executor.work_root }}/artifacts"
 translation_output_src: "src/{{ zuul.project.canonical_name }}/translation-source/"
+zuul_output_dir: "{{ ansible_user_dir }}/zuul-output"
+zuul_use_fetch_output: "{{ zuul_site_use_fetch_output|default(false) }}"

roles/fetch-translation-output/tasks/main.yaml

@@ -3,12 +3,22 @@
     path: "{{ translation_output_src }}"
   register: translation_files
 
-- name: Collect translation source files
-  synchronize:
-    dest: "{{ zuul_executor_dest }}"
-    mode: pull
-    src: "{{ translation_output_src }}"
-    verify_host: true
-    owner: no
-    group: no
+- block:
+    - name: Collect translation source files
+      synchronize:
+        dest: "{{ zuul_executor_dest }}"
+        mode: pull
+        src: "{{ translation_output_src }}"
+        verify_host: true
+        owner: no
+        group: no
+      when: not zuul_use_fetch_output
+
+    - name: Copy translation source files
+      copy:
+        dest: "{{ zuul_output_dir }}/artifacts"
+        src: "{{ translation_output_src }}"
+        mode: 0755
+        remote_src: true
+      when: zuul_use_fetch_output
   when: translation_files.stat.exists