From 238b0dc94b068a32530e8675425d22753d4af343 Mon Sep 17 00:00:00 2001
From: Robert Hensing <robert@roberthensing.nl>
Date: Mon, 29 Jan 2024 18:57:52 +0100
Subject: [PATCH] apps: Add polyfill

---
 modules/apps.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/modules/apps.nix b/modules/apps.nix
index c49073d..1171dcf 100644
--- a/modules/apps.nix
+++ b/modules/apps.nix
@@ -3,12 +3,16 @@ let
   inherit (lib)
     mkOption
     types
-    getExe
     ;
   inherit (flake-parts-lib)
     mkTransposedPerSystemModule
     ;
 
+  getExe = lib.getExe or (
+    x:
+    "${lib.getBin x}/bin/${x.meta.mainProgram or (throw ''Package ${x.name or ""} does not have meta.mainProgram set, so I don't know how to find the main executable. You can set meta.mainProgram, or pass the full path to executable, e.g. program = "''${pkg}/bin/foo"'')}"
+  );
+
   programType = lib.types.coercedTo derivationType getExe lib.types.str;
 
   derivationType = lib.types.package // {