Refactor and add deployment support

lib/utils.libsonnet

@@ -0,0 +1,32 @@
+{
+    # adopted from stdlib source to handle array merges
+    # https://github.com/google/jsonnet/blob/4e67da2c015bb316158d3e52a47376b38a29a4ef/stdlib/std.jsonnet#L1473
+    merge (target, patch)::
+        if std.isObject(patch) then
+            local target_object =
+                if std.isObject(target) then target else {};
+
+            local target_fields =
+                if std.isObject(target_object) then std.objectFields(target_object) else [];
+
+            local null_fields = [k for k in std.objectFields(patch) if patch[k] == null];
+            local both_fields = std.setUnion(target_fields, std.objectFields(patch));
+
+            {
+                [k]:
+                    if !std.objectHas(patch, k) then
+                         target_object[k]
+                    else if !std.objectHas(target_object, k) then
+                        $.merge(null, patch[k])
+                    else
+                        $.merge(target_object[k], patch[k])
+                for k in std.setDiff(both_fields, null_fields)
+            }
+        else if std.isArray(patch) then
+            if std.isArray(target) && target != [null] then
+                target + patch
+            else
+                patch
+        else
+            patch
+}