nixos/nextcloud: improve documentation of `adminuser`-option

This option only has an effect on the initial setup of Nextcloud and
changes later won't have any effect.

Same issue as with `adminpassFile` - it's only passed to the installer
command - but even worse because the username is frequently used as
unique ID in the database, so there's no trivial way to change it, even
imperatively.

1 files changed, 5 insertions, 1 deletions

diff --git a/nixos/modules/services/web-apps/nextcloud.nix b/nixos/modules/services/web-apps/nextcloud.nix
index 503db124635cc..e0a7e7d4859c8 100644
--- a/nixos/modules/services/web-apps/nextcloud.nix
+++ b/nixos/modules/services/web-apps/nextcloud.nix
@@ -405,7 +405,11 @@ in {
       adminuser = mkOption {
         type = types.str;
         default = "root";
-        description = lib.mdDoc "Username for the admin account.";
+        description = lib.mdDoc ''
+          Username for the admin account. The username is only set during the
+          initial setup of Nextcloud! Since the username also acts as unique
+          ID internally, it cannot be changed later!
+        '';
       };
       adminpassFile = mkOption {
         type = types.str;