From 0458b14f481ddd626e03f7b1cd4be4344960fd29 Mon Sep 17 00:00:00 2001
From: h7x4 <h7x4@nani.wtf>
Date: Thu, 4 Jun 2026 19:28:21 +0900
Subject: [PATCH] core-init-ext: add more checking and verbose errors to
 `checkPhase`

---
 src/core-init-ext.nix | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/core-init-ext.nix b/src/core-init-ext.nix
index 49977e5..34f0d26 100644
--- a/src/core-init-ext.nix
+++ b/src/core-init-ext.nix
@@ -79,6 +79,18 @@ in stdenv.mkDerivation (finalAttrs: {
   checkPhase = ''
     runHook preCheck
 
+    for ext in ${lib.escapeShellArgs (builtins.catAttrs "library" extensions)}; do
+      if [ ! -f "$ext" ]; then
+        echo "Extension $ext does not exist."
+        exit 1
+      fi
+
+      if ! file "$ext" | grep -qE "ELF|ar archive"; then
+        echo "Extension $ext does not appear to be a valid shared library or static archive."
+        exit 1
+      fi
+    done
+
     for ext in ${lib.escapeShellArgs (builtins.catAttrs "library" extensions)}; do
       if nm -g --defined-only "$ext" | grep -q " sqlite_api$"; then
         echo "Extension $ext appears to reference the 'sqlite_api' symbol, which is not expected for extensions which are going to be statically linked."
@@ -94,6 +106,8 @@ in stdenv.mkDerivation (finalAttrs: {
     for sym in "''${!expectedSymbols[@]}"; do
       if ! nm -g --defined-only "''${expectedSymbols[$sym]}" | grep -q " ''${sym}$"; then
         echo "Expected symbol $sym not found in ''${expectedSymbols[$sym]}."
+        echo "Found symbols:"
+        nm -g --defined-only "''${expectedSymbols[$sym]}"
         exit 1
       fi
     done