Consolidate more Conda solves in CI

Issue: rapidsai/build-planning#22

ci/test_java.sh

@@ -1,15 +1,20 @@
 #!/bin/bash
-# Copyright (c) 2024, NVIDIA CORPORATION.
+# Copyright (c) 2024-2025, NVIDIA CORPORATION.
 
 set -euo pipefail
 
 . /opt/conda/etc/profile.d/conda.sh
 
+rapids-logger "Downloading artifacts from previous jobs"
+CPP_CHANNEL=$(rapids-download-conda-from-s3 cpp)
+
 rapids-logger "Generate java testing dependencies"
 rapids-dependency-file-generator \
   --output conda \
   --file-key test_java \
-  --matrix "cuda=${RAPIDS_CUDA_VERSION%.*};arch=$(arch)" | tee env.yaml
+  --matrix "cuda=${RAPIDS_CUDA_VERSION%.*};arch=$(arch)" \
+  --prepend-channel "${CPP_CHANNEL}" \
+  | tee env.yaml
 
 rapids-mamba-retry env create --yes -f env.yaml -n test
 
@@ -18,15 +23,8 @@ set +u
 conda activate test
 set -u
 
-rapids-logger "Downloading artifacts from previous jobs"
-CPP_CHANNEL=$(rapids-download-conda-from-s3 cpp)
-
 rapids-print-env
 
-rapids-mamba-retry install \
-  --channel "${CPP_CHANNEL}" \
-  libkvikio
-
 rapids-logger "Check GPU usage"
 nvidia-smi
 

dependencies.yaml

@@ -104,6 +104,7 @@ files:
       - cuda_version
       - cuda
       - test_java
+      - depends_on_libkvikio
 channels:
   - rapidsai
   - rapidsai-nightly