From 6528de1a4f140a62612c939356c7820d445e03e1 Mon Sep 17 00:00:00 2001
From: Claudio Bley <claudio.bley@gmail.com>
Date: Wed, 24 Jan 2024 12:02:51 +0100
Subject: [PATCH] bazel_6: Add check to assert GSON serialization works

See https://github.com/NixOS/nixpkgs/issues/273500
---
 .../tools/build-managers/bazel/bazel_6/default.nix         | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/development/tools/build-managers/bazel/bazel_6/default.nix b/pkgs/development/tools/build-managers/bazel/bazel_6/default.nix
index 8f775dd056a35..7de1ee8e072fa 100644
--- a/pkgs/development/tools/build-managers/bazel/bazel_6/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/bazel_6/default.nix
@@ -678,6 +678,13 @@ stdenv.mkDerivation rec {
     # second call succeeds because it defers to $out/bin/bazel-{version}-{os_arch}
     hello_test
 
+    ## Test that the GSON serialisation files are present
+    gson_classes=$(unzip -l $($out/bin/bazel info install_base)/A-server.jar | grep -F -c _GsonTypeAdapter.class)
+    if [ "$gson_classes" -lt 10 ]; then
+      echo "Missing GsonTypeAdapter classes in A-server.jar. Lockfile generation will not work"
+      exit 1
+    fi
+
     runHook postInstall
   '';