From 791ae23361d260465439f7d1e24431fabc9e8136 Mon Sep 17 00:00:00 2001
From: L3D <l3d@c3woc.de>
Date: Mon, 22 Mar 2021 02:22:22 +0100
Subject: [PATCH] add optional versionscheck

a simple version check that can prevent you from accidentally running an older version of this role.
---
 README.md              |  1 +
 defaults/main.yml      |  1 +
 tasks/main.yml         |  4 ++++
 tasks/versioncheck.yml | 46 ++++++++++++++++++++++++++++++++++++++++++
 vars/main.yml          |  3 +++
 5 files changed, 55 insertions(+)
 create mode 100644 tasks/versioncheck.yml

diff --git a/README.md b/README.md
index 881da62..f65b1b6 100644
--- a/README.md
+++ b/README.md
@@ -64,6 +64,7 @@ Here is a deeper insight into the variables of this gitea role. For the exact fu
 | `gitea_gpg_server` | `hkp://keyserver.ubuntu.com:80` | A gpg key server where this role can download the gpg key |
 | `gitea_backup_on_upgrade` | `false` | Optionally a backup can be created with every update of gitea. |
 | `gitea_backup_location` | `{{ gitea_home }}/backups/` | Where to store the gitea backup if one is created with this role. |
+| `submodules_versioncheck` | `false` | a simple version check that can prevent you from accidentally running an older version of this role. *(recomended)* |
 
 ### gitea in the linux world
 | variable name | default value | description |
diff --git a/defaults/main.yml b/defaults/main.yml
index 92c7822..09c2b68 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -7,6 +7,7 @@ gitea_gpg_key: '7C9E68152594688862D62AF62D9AE806EC1592E2'
 gitea_gpg_server: 'hkp://keyserver.ubuntu.com:80'
 gitea_backup_on_upgrade: false
 gitea_backup_location: "{{ gitea_home }}/backups/"
+submodules_versioncheck: false
 
 # gitea in the linux world
 gitea_group: 'gitea'
diff --git a/tasks/main.yml b/tasks/main.yml
index cf2ae75..e62be44 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -1,4 +1,8 @@
 ---
+- name: perform optional versionscheck
+  ansible.builtin.include_tasks: versioncheck.yml
+  when: submodules_versioncheck|bool
+
 - name: Gather variables for each operating system
   include_vars: "{{ item }}"
   with_first_found:
diff --git a/tasks/versioncheck.yml b/tasks/versioncheck.yml
new file mode 100644
index 0000000..dca3e47
--- /dev/null
+++ b/tasks/versioncheck.yml
@@ -0,0 +1,46 @@
+---
+- name: Create directory for versionscheck
+  become: true
+  ansible.builtin.file:
+    path: '/etc/.ansible-version'
+    state: directory
+    mode: 0755
+  when: submodules_versioncheck|bool
+
+- name: check playbook version
+  become: true
+  ansible.builtin.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
+  ansible.builtin.debug:
+    msg: "Remote role version: {{ playbook_version.content | default('Y3VycmVudGx5IG5vdCBkZXBsb3llZAo=') | b64decode | string }}"
+  when: submodules_versioncheck|bool
+
+- name: Print locale role version
+  ansible.builtin.debug:
+    msg: "Local role version: '{{ playbook_version_number|string }}'."
+  when: submodules_versioncheck|bool
+
+- name: Check if your version is outdated
+  ansible.builtin.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
+  ansible.builtin.find:
+    paths: '/etc/ansible-version/'
+  register: filesFound
+
+- name: write new version to remote disk
+  become: true
+  ansible.builtin.copy:
+    content: "{{ playbook_version_number }}"
+    dest: "/etc/.ansible-version/{{ playbook_version_path }}"
+    mode: '0644'
+  when: submodules_versioncheck|bool
diff --git a/vars/main.yml b/vars/main.yml
index b473a40..bb77064 100644
--- a/vars/main.yml
+++ b/vars/main.yml
@@ -8,3 +8,6 @@ gitea_go_arch_map:
   armv5l: 'arm-5'
 
 gitea_arch: "{{ gitea_go_arch_map[ansible_architecture] | default(ansible_architecture) }}"
+
+playbook_version_number: 5  # should be int
+playbook_version_path: 'do1jlr.gitea.version'