Revert "lib/types: Allow paths as submodule values"

This reverts commit eec83d41e3e7d9ad5bc1086198d972d55bab1203.

This broke hydra evaluation because with this commit submodule values
are allowed to be paths, however the certmgr module uses `either
(submodule ...) path` in its type, meaning it already used paths for
something else which would now be interpreted as a submodule.

1 files changed, 3 insertions, 5 deletions

diff --git a/lib/types.nix b/lib/types.nix
index 847a4e902cab..de3c4f0d6030 100644
--- a/lib/types.nix
+++ b/lib/types.nix
@@ -376,16 +376,14 @@ rec {
           else unify (if shorthandOnlyDefinesConfig then { config = value; } else value);
 
         allModules = defs: modules ++ imap1 (n: { value, file }:
-          if isAttrs value || isFunction value then
-            # Annotate the value with the location of its definition for better error messages
-            coerce (lib.modules.unifyModuleSyntax file "${toString file}-${toString n}") value
-          else value
+          # Annotate the value with the location of its definition for better error messages
+          coerce (lib.modules.unifyModuleSyntax file "${toString file}-${toString n}") value
         ) defs;
 
       in
       mkOptionType rec {
         name = "submodule";
-        check = x: isAttrs x || isFunction x || path.check x;
+        check = x: isAttrs x || isFunction x;
         merge = loc: defs:
           (evalModules {
             modules = allModules defs;