feat(ansible): add role for variable debugging

ansible/roles/debug_forge_vars/README.md

@@ -0,0 +1,46 @@
+# Role - debug_forge_vars
+
+This role is used for debugging purposes only.
+
+## Variables
+
+The role has the following variables defined.
+
+### default/main.yml
+
+In the [main.yml](./defaults/main.yml/) all variables are defined which are
+used in the context of debugging. Usually end-users should not worry about them to much.
+
+<!-- markdownlint-disable MD013 -->
+
+| name                            | type | default value | description                                                                                 |
+| ------------------------------- | ---- | ------------- | ------------------------------------------------------------------------------------------- |
+| `forge_debug_vars_regex_search` | str  | ^forge\_.+    | Python regex search term. Useful if you want to print out all variables starting with `xyz` |
+
+<!-- markdownlint-enable MD013 -->
+
+## Example Playbook Usage
+
+This role is best included in a playbook as pre-task:
+
+```yaml
+pre_tasks:
+  - name: DEBUG - forge variables
+    ansible.builtin.include_role:
+      name: debug_forge_vars
+```
+
+With the role included you can launch the playbook in verbose mode `ansible-playbook -v`.
+This will print all variables found with the regex search term defined in the `forge_debug_vars_regex_search`
+variable.
+
+You can modify the `forge_debug_vars_regex_search` term by changing it via the vars statement
+
+```yaml
+pre_tasks:
+  - name: DEBUG - forge git variables
+    ansible.builtin.include_role:
+      name: debug_forge_vars
+    vars:
+      forge_debug_vars_regex_search: ^forge_git.+
+```

ansible/roles/debug_forge_vars/defaults/main.yml

@@ -0,0 +1,2 @@
+# Default vars for this role
+forge_debug_vars_regex_search: "{{ lookup('ansible.builtin.env', 'FORGE_DEBUG_VARS_REGEX_SEARCH', default='^forge_.+') }}"

ansible/roles/debug_forge_vars/tasks/main.yml

@@ -0,0 +1,13 @@
+---
+# main task file for this role
+
+- name: DEBUG | forge variables
+  ansible.builtin.debug:
+    msg: "{{ item }}: {{ lookup('ansible.builtin.vars', item) }}"
+    verbosity: 1
+  loop: "{{ __forge_vars_used }}"
+  loop_control:
+    extended: true
+    label: "{{ ansible_loop.index }}/{{ ansible_loop.length }}"
+  vars:
+    __forge_vars_used: "{{ lookup('ansible.builtin.varnames', forge_debug_vars_regex_search, wantlist=true) }}"