Check environment variables at build time

[perso/Immae/Config/Nix.git] / libs.nix

diff --git a/libs.nix b/libs.nix
index da13a0359c227df3790d2d6e5c5a3ae68aa530f4..cef85869d513fba5227907955abe20eef49d60d0 100644 (file)
--- a/libs.nix
+++ b/libs.nix
@@ -26,4 +26,6 @@ in
       name = "${json.meta.name}-${version}";
       src = fetchgit json.git;
     };
+
+  checkEnv = var: builtins.stringLength (builtins.getEnv var) > 0;
 }