treewide: add defaultText for options with simple interpolation defaults

adds defaultText for all options that use `cfg.*` values in their
defaults, but only for interpolations with no extra processing (other
than toString where necessary)

1 files changed, 1 insertions, 0 deletions

diff --git a/nixos/modules/services/misc/etcd.nix b/nixos/modules/services/misc/etcd.nix
index fc6dfaa4285..88920d6a28e 100644
--- a/nixos/modules/services/misc/etcd.nix
+++ b/nixos/modules/services/misc/etcd.nix
@@ -50,6 +50,7 @@ in {
     initialCluster = mkOption {
       description = "Etcd initial cluster configuration for bootstrapping.";
       default = ["${cfg.name}=http://127.0.0.1:2380"];
+      defaultText = literalExpression ''["''${config.${opt.name}}=http://127.0.0.1:2380"]'';
       type = types.listOf types.str;
     };