Refactor installation of NGINX Unit modules

Use a list that lets users specify which modules they want to install instead of installing all modules available in each distro

Author: alessfg

defaults/main.yml

@@ -31,7 +31,7 @@ branch: mainline
 # Install NGINX Unit and NGINX Unit packages.
 # Default is false.
 unit_enable: false
-unit_packages: false
+unit_modules: null
 
 # Install NGINX JavaScript, Perl, ModSecurity WAF (NGINX Plus only), GeoIP, Image-Filter, RTMP Media Streaming, and/or XSLT modules.
 # Default is false.

tasks/unit/install-modules.yml

@@ -0,0 +1,6 @@
+- name: "(Install: All OSs) Install NGINX Unit Modules"
+  package:
+    name: "{{ item }}"
+    state: present
+  with_items: "{{ unit_modules }}"
+  notify: "(Handler: All OSs) Start NGINX Unit"

tasks/unit/install-packages.yml

@@ -11,5 +11,5 @@
     state: present
   notify: "(Handler: All OSs) Start NGINX Unit"
 
-- import_tasks: install-packages.yml
-  when: unit_packages
+- import_tasks: install-modules.yml
+  when: unit_modules is defined and unit_modules

tasks/unit/install-unit.yml

@@ -6,4 +6,6 @@
     - ansible-role-nginx
   vars:
     unit_enable: true
-    unit_packages: true
+    unit_modules:
+      - unit-php
+      - unit-perl