Install extra packages which are listed on certbot_package_extras variable

.gitignore

@@ -1,2 +1,3 @@
 *.retry
 tests/test.sh
+meta/.galaxy_install_info

defaults/main.yml

@@ -1,4 +1,7 @@
 ---
+# Additional packages/plugins for Certbot
+certbot_package_extras: []
+
 # Certbot auto-renew cron job configuration (for certificate renewals).
 certbot_auto_renew: true
 certbot_auto_renew_user: "{{ ansible_user }}"

meta/.galaxy_install_info

@@ -1 +0,0 @@
-{install_date: 'Tue Jul  4 10:56:19 2017', version: 2.0.0}

tasks/install-with-package.yml

@@ -1,7 +1,15 @@
 ---
+- name: Define certbot_packages.
+  set_fact:
+    certbot_packages: "{{ [ certbot_package ] }}"
+
+- name: Define extra certbot_packages.
+  set_fact:
+    certbot_packages: "{{ certbot_packages | list + certbot_package_extras | list }}"
+
 - name: Install Certbot.
   package: "name={{ item }} state=present"
-  with_items: "{{ certbot_package }}"
+  with_items: "{{ certbot_packages }}"
 
 - name: Set Certbot script variable.
   set_fact:

vars/Ubuntu-16.04.yml

@@ -1,2 +1 @@
-certbot_package:
-  - letsencrypt
+certbot_package: letsencrypt

vars/default.yml

@@ -1,5 +1,2 @@
 ---
-certbot_package:
-  - certbot
-  - certbot-apache
-  - certbot-nginx
+certbot_package: certbot