implement versionscheck

.yamllint

@@ -0,0 +1,8 @@
+---
+extends: default
+
+rules:
+  # 150 chars should be enough, but don't fail if a line is longer
+  line-length:
+    max: 150
+    level: warning

defaults/main.yml

@@ -1,4 +1,6 @@
 ---
+# enable version check for this role? (true is recomended)
+submodules_versioncheck: false
 
 nginx_sites: {}
 

tasks/main.yml

@@ -1,4 +1,8 @@
 ---
+- name: simple versionscheck
+  include_tasks: versioncheck.yml
+  when: submodules_versioncheck | bool
+
 - name: Install nginx
   include_tasks: installation.yml
 

tasks/versioncheck.yml

@@ -0,0 +1,46 @@
+---
+- name: Create directory for versionscheck
+  become: true
+  file:
+    path: '/etc/.ansible-version'
+    state: directory
+    mode: 0755
+  when: submodules_versioncheck|bool
+
+- name: check playbook version
+  become: true
+  slurp:
+    src: "/etc/.ansible-version/{{ playbook_version_path }}"
+  register: playbook_version
+  when: submodules_versioncheck|bool
+  ignore_errors: true
+  failed_when: false
+
+- name: Print remote role version
+  debug:
+    msg: "Remote role version: {{ playbook_version.content | default('Y3VycmVudGx5IG5vdCBkZXBsb3llZAo=') | b64decode | string }}"
+  when: submodules_versioncheck|bool
+
+- name: Print locale role version
+  debug:
+    msg: "Local role version: '{{ playbook_version_number|string }}'."
+  when: submodules_versioncheck|bool
+
+- name: Check if your version is outdated
+  fail:
+    msg: "Your ansible module has the version '{{ playbook_version_number }}' and is outdated. You need to update it!"
+  when:
+    - playbook_version.content|default("Mgo=")|b64decode|int - 1 >= playbook_version_number|int and submodules_versioncheck|bool
+
+- name: check if '/etc/ansible-version/' is empty
+  find:
+    paths: '/etc/ansible-version/'
+  register: filesFound
+
+- name: write new version to remote disk
+  become: true
+  copy:
+    content: "{{ playbook_version_number }}"
+    dest: "/etc/.ansible-version/{{ playbook_version_path }}"
+    mode: '0644'
+  when: submodules_versioncheck|bool

vars/main.yml

@@ -0,0 +1,3 @@
+---
+playbook_version_number: 22  # should be int
+playbook_version_path: 'do1jlr.nginx_roles-ansible.version'