From 0c4c0dadc71b3300e63b55d56bf86cbb2d89986a Mon Sep 17 00:00:00 2001
From: Ben Sima <ben@bsima.me>
Date: Fri, 14 Nov 2025 22:50:55 -0500
Subject: fix(bild): per-module builds + exit code propagation

- Fix nixBuild to propagate exit code from realise step
  - Previously used >> which discarded exit code - Now checks realise
  result before running symlink - Fixes false success checkmarks on
  build failures

- Fix per-module Nix derivations
  - Use cp -rL instead of tar (src is directory not tarball) - Add
  coreutils and findutils to pkgs - Copy deps to . and use -i. for
  GHC - Use find with --parents to preserve module hierarchy - Set
  dontStrip=true to avoid fixup script errors

- Tested: Example.hs, Task.hs, Dragons.hs, Bild.hs all build - Known
issue: makeWrapper fixup scripts have unbound vars (Nix bug)
---
 Omni/Bild.hs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'Omni/Bild.hs')

diff --git a/Omni/Bild.hs b/Omni/Bild.hs
index 078aac1..15e359f 100644
--- a/Omni/Bild.hs
+++ b/Omni/Bild.hs
@@ -1337,7 +1337,9 @@ nixBuild loud maxJobs cores target@(Target {..}) =
           |> str
           |> realise
           |> run
-          >> run symlink
+          +> \case
+            (Exit.ExitSuccess, _) -> run symlink
+            failure -> pure failure
       x -> pure x
   where
     instantiate root =
-- 
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