create basic module including version management

defaults/main.yml

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+---
+# version check for this role?
+submodules_versioncheck: true

tasks/main.yml

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+---
+- include_tasks: versioncheck.yml
+  when: submodules_versioncheck|bool
+

tasks/versioncheck.yml

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+---
+- 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: "{{ playbook_version_path }}"
+  register: playbook_version
+  when: submodules_versioncheck|bool
+  ignore_errors: yes
+  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+- name: Check if your version is outdated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+    msg: "Your ansible module has the version '{{ playbook_version_number }}' and is outdated.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: write new version to remote disk
+  become: true
+  copy:
+    content: "{{ playbook_version_number }}"
+    dest: "{{ playbook_version_path }}"
+  when: submodules_versioncheck|bool

vars/main.yml

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+---
+playbook_version_number: 1024 # should be over ninethousand
+playbook_version_path: '/etc/ansible-version/role-weechat_chaos-bodensee_github.com.version'