Move the yaml functions to their own file.

nix/kubernetes/functions/to_yaml.nix

@@ -0,0 +1,24 @@
+{
+  pkgs,
+  ...
+}:
+let
+  to_yaml_file =
+    file_name: contents:
+    let
+      settingsFormat = pkgs.formats.yaml { };
+      yaml_file = settingsFormat.generate file_name contents;
+    in
+    yaml_file;
+  to_yaml =
+    file_name: contents:
+    let
+      settingsFormat = pkgs.formats.yaml { };
+      yaml_file = settingsFormat.generate file_name contents;
+      yaml_content = builtins.readFile yaml_file;
+    in
+    yaml_content;
+in
+{
+  inherit to_yaml to_yaml_file;
+}

nix/kubernetes/keys/package/k8s-encryption-key/package.nix

@@ -8,29 +8,13 @@
 # installCheckPhase
 # distPhase
 {
-  lib,
   pkgs,
   stdenv,
   runCommand,
-  writeText,
   ...
 }:
 let
-  to_yaml_file =
+  to_yaml_file = ((import ../../../functions/to_yaml.nix) {inherit pkgs;}).to_yaml_file;
-    file_name: contents:
-    let
-      settingsFormat = pkgs.formats.yaml { };
-      yaml_file = settingsFormat.generate file_name contents;
-    in
-    yaml_file;
-  to_yaml =
-    file_name: contents:
-    let
-      settingsFormat = pkgs.formats.yaml { };
-      yaml_file = settingsFormat.generate file_name contents;
-      yaml_content = builtins.readFile yaml_file;
-    in
-    yaml_content;
   kube_encryption_key = runCommand "kube_encryption_key" { } ''
     head -c 32 /dev/urandom | base64 | tee $out
   '';