feat: Add Ansible/Jinja2/Collections validation (#456)

Author: alessfg

Diff for: CHANGELOG.md

@@ -4,6 +4,7 @@
 
 FEATURES:
 
+- Add validation tasks to check the Ansible version, the Jinja2 version, and whether the required Ansible collections for this role are installed.
 - Bump the Ansible `community.general` collection to `9.2.0`, `community.crypto` collection to `2.21.1` and `community.docker` collection to `3.11.0`.
 
 BUG FIXES:

Diff for: tasks/main.yml

@@ -1,4 +1,8 @@
 ---
+- name: Validate Ansible/Jinja2 version and Ansible collections
+  ansible.builtin.include_tasks: "{{ role_path }}/tasks/validate/validate.yml"
+  tags: nginx_config_validate
+
 - name: Set up SELinux
   ansible.builtin.include_tasks: "{{ role_path }}/tasks/prerequisites/setup-selinux.yml"
   when:

Diff for: tasks/validate/validate.yml

@@ -0,0 +1,45 @@
+---
+- name: Verify you are using a supported Ansible version on your Ansible host
+  ansible.builtin.assert:
+    that: ansible_version['full'] is version(nginx_config_ansible_version, '>=')
+    success_msg: Ansible {{ ansible_version['full'] }} is supported.
+    fail_msg: Ansible {{ ansible_version['full'] }} has reached End of Life (EoL). Please upgrade to a supported Ansible release. Check the README for more details.
+  delegate_to: localhost
+  ignore_errors: true # noqa ignore-errors
+
+- name: Extract the version of Jinja2 installed on your Ansible host
+  ansible.builtin.command: ansible --version
+  register: jinja2_version
+  changed_when: false
+  delegate_to: localhost
+  become: false
+
+- name: Verify that you are using a supported Jinja2 version on your Ansible host
+  ansible.builtin.assert:
+    that: (jinja2_version['stdout'] | regex_search('jinja version = ([\\d.]+)', '\\1') | first) is version(nginx_config_jinja2_version, '>=')
+    success_msg: Jinja2 {{ jinja2_version['stdout'] | regex_search('jinja version = ([\d.]+)', '\1') | first }} is supported.
+    fail_msg: Jinja2 {{ jinja2_version['stdout'] | regex_search('jinja version = ([\d.]+)', '\1') | first }} is not supported. Please upgrade to Jinja2 3.1. Check the README for more details.
+  delegate_to: localhost
+  become: false
+
+- name: Verify that the 'community.general' and 'ansible.posix' Ansible collections are installed on your Ansible host
+  when: nginx_config_selinux | bool
+  delegate_to: localhost
+  become: false
+  block:
+    - name: Extract the list of Ansible collections installed on your Ansible host
+      ansible.builtin.command: ansible-galaxy collection list
+      register: collection_list
+      changed_when: false
+
+    - name: Verify that the 'community.general' Ansible collection is installed on your Ansible host
+      ansible.builtin.assert:
+        that: collection_list is search('community.general')
+        success_msg: The 'community.general' Ansible collection is installed.
+        fail_msg: The 'community.general' Ansible collection is not installed. Please install the 'community.general' Ansible collection. Check the README for more details.
+
+    - name: Verify that the 'ansible.posix' Ansible collection is installed on your Ansible host
+      ansible.builtin.assert:
+        that: lookup('community.general.collection_version', 'ansible.posix') != 'none'
+        success_msg: The 'ansible.posix' Ansible collection is installed.
+        fail_msg: The 'ansible.posix' Ansible collection is not installed. Please install the 'ansible.posix' Ansible collection. Check the README for more details.

Diff for: vars/main.yml

@@ -1 +1,4 @@
 ---
+# Set the minimum version required for Ansible and Jinja2
+nginx_config_ansible_version: 2.16
+nginx_config_jinja2_version: 3.1