ensure-yarn: refactor to use ensure-package-repositories

This patch refactors ensure-yarn to use the new generic role
to allow it to be cross-platform in the future.

Change-Id: I32bb40f5afb26d0d906f332c1c8440859367d97a

roles/ensure-yarn/tasks/Debian.yaml

@@ -1,14 +0,0 @@
-- name: Add yarnpkg repository key
-  apt_key:
-    url: https://dl.yarnpkg.com/debian/pubkey.gpg
-  become: yes
-
-- name: Add yarnpkg apt source repository
-  apt_repository:
-    repo: "deb https://dl.yarnpkg.com/debian/ stable main"
-    state: present
-    update_cache: yes
-  become: yes
-
-- name: Install yarn
-  include: yarn.yaml

roles/ensure-yarn/tasks/RedHat.yaml

@@ -1,8 +0,0 @@
-- name: Add yarnpkg repo file
-  get_url:
-    url: https://dl.yarnpkg.com/rpm/yarn.repo
-    dest: /etc/yum.repos.d/yarn.repo
-  become: yes
-
-- name: Install yarn
-  include: yarn.yaml

roles/ensure-yarn/tasks/main.yaml

@@ -1,3 +1,26 @@
+- name: Gather variables for each operating system
+  include_vars: "{{ zj_item }}"
+  with_first_found:
+    - skip: true
+      files:
+        - "{{ ansible_distribution | lower }}-{{ ansible_distribution_version | lower }}.yaml"
+        - "{{ ansible_distribution | lower }}-{{ ansible_distribution_major_version | lower }}.yaml"
+        - "{{ ansible_os_family | lower }}-{{ ansible_distribution_major_version | lower }}.yaml"
+        - "{{ ansible_distribution | lower }}.yaml"
+        - "{{ ansible_os_family | lower }}-{{ ansible_distribution_version.split('.')[0] }}.yaml"
+        - "{{ ansible_os_family | lower }}.yaml"
+  loop_control:
+    loop_var: zj_item
+  tags:
+    - always
+
+- name: Add all repositories
+  include_role:
+    name: ensure-package-repositories
+  vars:
+    repositories_keys: "{{ _yarn_keys | default([]) }}"
+    repositories_list: "{{ _yarn_repos | default([]) }}"
+
 - name: Check for yarn.lock file
   stat:
     path: "{{ yarn_lock_file_path }}"
@@ -7,9 +30,6 @@
   register: yarn_lock
 
 - name: Install yarn if needed
-  include: "{{ item }}"
+  include: yarn.yaml
-  with_first_found:
-    - "{{ ansible_distribution }}.yaml"
-    - "{{ ansible_os_family }}.yaml"
   when:
     - yarn_lock.stat.exists

roles/ensure-yarn/vars/debian.yaml

@@ -0,0 +1,4 @@
+_yarn_keys:
+  - url: https://dl.yarnpkg.com/debian/pubkey.gpg
+_yarn_repos:
+  - repo: deb https://dl.yarnpkg.com/debian/ stable main

roles/ensure-yarn/vars/redhat.yaml

@@ -0,0 +1,6 @@
+_yarn_repos:
+  - name: yarn
+    description: Yarn Repository
+    baseurl: https://dl.yarnpkg.com/rpm/
+    gpgcheck: yes
+    gpgkey: https://dl.yarnpkg.com/rpm/pubkey.gpg