Add note: Keep error message in sync with nixos-option

2019-09-16 08:21:54 -07:00 · 2019-09-16 08:21:54 -07:00 · 4ded9beea2
commit 4ded9beea2
parent c352bfeaf0
1 changed files with 2 additions and 0 deletions
--- a/lib/modules.nix
+++ b/lib/modules.nix
@ -326,6 +326,8 @@ rec {

      # The value with a check that it is defined
      valueDefined = if res.isDefined then res.mergedValue else
+        # (nixos-option detects this specific error message and gives it special
+        # handling.  If changed here, please change it there too.)
        throw "The option `${showOption loc}' is used but not defined.";

      # Apply the 'apply' function to the merged value. This allows options to