stdenv/check-meta: do deep type checks

Use a wrapper around `mergeDefinitions` to type-check values deeply, so
that e.g. `maintainers = [ 42 ];` is an error.

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/generators.nix b/lib/generators.nix
index 4c9c2d1e98693..968331a0ebde8 100644
--- a/lib/generators.nix
+++ b/lib/generators.nix
@@ -289,7 +289,9 @@ rec {
        (This means fn is type Val -> String.) */
     allowPrettyValues ? false,
     /* If this option is true, the output is indented with newlines for attribute sets and lists */
-    multiline ? true
+    multiline ? true,
+    /* Initial indentation level */
+    indent ? ""
   }:
     let
     go = indent: v: with builtins;
@@ -348,7 +350,7 @@ rec {
                 };") v)
         + outroSpace + "}"
     else abort "generators.toPretty: should never happen (v = ${v})";
-  in go "";
+  in go indent;
 
   # PLIST handling
   toPlist = {}: v: let