homeserver/roles/mgrote_gitea_setup/tasks/main.yml

---
- name: Ensure LDAP config is configured
  ansible.builtin.command: |
    forgejo admin auth add-ldap \
      --config "/etc/gitea/gitea.ini" \
      --name "lldap" \
      --security-protocol "unencrypted" \
      --host "ldap.mgrote.net" \
      --port "3890" \
      --bind-dn "uid=ladmin,ou=people,dc=mgrote,dc=net" \
      --bind-password GEHEIM \
      --user-search-base "ou=people,dc=mgrote,dc=net" \
      --user-filter "(&(memberof=cn=gitea,ou=groups,dc=mgrote,dc=net)(|(uid=%[1]s)(mail=%[1]s)))" \
      --username-attribute "uid" \
      --email-attribute "mail" \
      --firstname-attribute "givenName" \
      --surname-attribute "sn" \
      --avatar-attribute "jpegPhoto" \
      --synchronize-users
  register: configured
  ignore_errors: true
  failed_when: 'not "Command error: login source already exists [name: lldap]" in configured.stderr'
  become_user: gitea

- name: debug
  ansible.builtin.debug:
    msg: "{{ configured }}"

- name: Modify LDAP config
  ansible.builtin.command: cat /etc/motd
  when: '"Command error: login source already exists [name: lldap]" in configured.stderr'
  become_user: gitea

...