roles/group_project/defaults/main.yml

-#SPDX-License-Identifier: MIT-0
+# SPDX-License-Identifier: MIT-0
 ---
 # defaults file for group_project
+
+project_names: []
+
+parent_group: "{{ projects_root_group }}/{{ module.name }}"
+group: "{{ parent_group }}/{{ module.term }}"

roles/group_project/tasks/main.yml

@@ -16,14 +16,19 @@
         # state: absent
     - name: "Create project facts"
       ansible.builtin.set_fact:
-        project_names: "{{ project_names + [group + '/' + item[0].name + '-' + item[1].repo_name] }}"
+        project_names: >-
+          {{ project_names + [
+            group + '/' +
+            item[0].name +
+            ('-' + item[1].repo_name if item[1].repo_name is defined and item[1].repo_name | length > 0 else '')
+          ] }}
       loop: "{{ module.teams | product(module.repo_config) | list }}"
     - name: "Print full project paths "
       ansible.builtin.debug:
         var: project_names
     - name: "Create projects"
       community.general.gitlab_project:
-        name: "{{ item[0].name }}-{{ item[1].repo_name }}"
+        name: "{{ item[0].name }}{{ '-' ~ item[1].repo_name if item[1].repo_name is defined else '' }}"
         group: "{{ group }}"
         initialize_with_readme: false
         import_url: "{{ item[1].import_url | default('https://mygit.th-deg.de/schober-public/templates/student-repo.git') }}"
@@ -32,7 +37,7 @@
       loop: "{{ module.teams | product(module.repo_config) | list }}"
     - name: "Set branch protection level"
       community.general.gitlab_protected_branch:
-        project: "{{ group }}/{{ item[0].name }}-{{ item[1].repo_name }}"
+        project: "{{ group }}/{{ item[0].name }}{{ '-' ~ item[1].repo_name if item[1].repo_name is defined else '' }}"
         name: main
         merge_access_levels: "{{ item[1].merge_access_levels }}"
         push_access_level: "{{ item[1].push_access_level }}"
@@ -41,7 +46,7 @@
       loop: "{{ module.teams | product(module.repo_config) | list }}"
     - name: "Invite user"
       cschober.mygit.gitlab_invitation:
-        gitlab_project: "{{ group }}/{{ item[0].name }}-{{ item[1].repo_name }}"
+        gitlab_project: "{{ group }}/{{ item[0].name }}{{ '-' ~ item[1].repo_name if item[1].repo_name is defined else '' }}"
         email: "{{ item[0].users }}"
         state: present
         access_level: "{{ item[1].access_level }}"

roles/group_project/vars/main.yml

 #SPDX-License-Identifier: MIT-0
 ---
 # vars file for group_project
-
-project_names: []
-gitlab_api_url:
-gitlab_api_token:
-
-projects_root_group: schober-teaching/student-projects
-
-parent_group: "{{ projects_root_group }}/{{ module.name }}"
-group: "{{ parent_group }}/{{ module.term }}"
-
-module:
-  name:
-  term:
-
-  repo_config:
-    - repo_name:
-      import_url:
-      access_level: developer
-      merge_access_levels: developer
-      push_access_level: developer
-  teams:
-    - name:
-      users: