Flatten the Nix strings on the fly

Reduces the size of the generated json by ~300%, and causes a ~1.6x speedup in the Nickel evaluation time
nickel-lang · Jun 26, 2024 · bd88905 · bd88905
1 parent 0100a9d
commit bd88905
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/lib/nix-interop/derivation.ncl b/lib/nix-interop/derivation.ncl
@@ -168,7 +168,12 @@ in
         mk_nix_string [value]
       else
         let { fragments, .. } = std.contract.apply NixSymbolicString label value in
-        mk_nix_string fragments,
+        mk_nix_string
+          (
+            std.array.flat_map
+              (fun elt => elt.fragments)
+              fragments
+          ),
 
   NixDerivation
     | doc m%"