From 2a4700c48be3c6b58e06fc31a78924fe643a6bae Mon Sep 17 00:00:00 2001
From: Guillaume Maudoux <guillaume.maudoux@tweag.io>
Date: Mon, 18 Dec 2023 20:09:34 +0100
Subject: [PATCH] bazel_7: Add regression test for empty lockfiles

---
 .../tools/build-managers/bazel/bazel_7/default.nix         | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/development/tools/build-managers/bazel/bazel_7/default.nix b/pkgs/development/tools/build-managers/bazel/bazel_7/default.nix
index 11145398d799..243af82288f2 100644
--- a/pkgs/development/tools/build-managers/bazel/bazel_7/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/bazel_7/default.nix
@@ -542,6 +542,13 @@ 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 $(bazel info install_base)/A-server.jar | grep GsonTypeAdapter.class | wc -l)
+    if [ "$gson_classes" -lt 10 ]; then
+      echo "Missing GsonTypeAdapter classes in A-server.jar. Lockfile generation will not work"
+      exit 1
+    fi
+
     runHook postInstall
   '';