add libcugraphops as a dependency of cugraph (#2019)

We need to do several things:
- Add libcugraphops to conda (both in the cugraph recipe as well as build environment)
- Add libcugraphops to cmake (I added a new thirdparty include here)
- Ensure that the right headers and objects are added in cmake

<s>For now, this is a work in progress since libcugraphops doesn't seem available on anaconda yet.</s>

Authors:
  - Matt Joux (https://github.com/MatthiasKohl)
  - Rick Ratzel (https://github.com/rlratzel)

Approvers:
  - Brad Rees (https://github.com/BradReesWork)
  - Robert Maynard (https://github.com/robertmaynard)
  - Rick Ratzel (https://github.com/rlratzel)
  - Jordan Jacobelli (https://github.com/Ethyling)

URL: #2019

ci/benchmark/build.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# Copyright (c) 2018-2021, NVIDIA CORPORATION.
+# Copyright (c) 2018-2022, NVIDIA CORPORATION.
 ##########################################
 # cuGraph Benchmark test script for CI   #
 ##########################################

conda/environments/cugraph_dev_cuda11.0.yml

@@ -6,6 +6,7 @@ channels:
 - conda-forge
 dependencies:
 - cudatoolkit=11.0
+- libcugraphops=22.04.*
 - cudf=22.04.*
 - libcudf=22.04.*
 - rmm=22.04.*

conda/environments/cugraph_dev_cuda11.2.yml

@@ -6,6 +6,7 @@ channels:
 - conda-forge
 dependencies:
 - cudatoolkit=11.2
+- libcugraphops=22.04.*
 - cudf=22.04.*
 - libcudf=22.04.*
 - rmm=22.04.*

conda/environments/cugraph_dev_cuda11.4.yml

@@ -6,6 +6,7 @@ channels:
 - conda-forge
 dependencies:
 - cudatoolkit=11.4
+- libcugraphops=22.04.*
 - cudf=22.04.*
 - libcudf=22.04.*
 - rmm=22.04.*

conda/environments/cugraph_dev_cuda11.5.yml

@@ -6,6 +6,7 @@ channels:
 - conda-forge
 dependencies:
 - cudatoolkit=11.5
+- libcugraphops=22.04.*
 - cudf=22.04.*
 - libcudf=22.04.*
 - rmm=22.04.*

conda/recipes/libcugraph/meta.yaml

@@ -37,6 +37,7 @@ requirements:
     - cmake>=3.20.1
     - doxygen>=1.8.11
     - cudatoolkit {{ cuda_version }}.*
+    - libcugraphops {{ minor_version }}.*
     - librmm {{ minor_version }}.*
     - cudf {{ minor_version }}.*
     - boost-cpp>=1.66

conda/recipes/libcugraph_etl/meta.yaml

@@ -37,6 +37,7 @@ requirements:
     - cmake>=3.20.1
     - doxygen>=1.8.11
     - cudatoolkit {{ cuda_version }}.*
+    - libcugraphops {{ minor_version }}.*  # needed for cmake to find transitive deps
     - libcudf {{ minor_version }}.*
     - libcugraph {{ minor_version }}.*
   run:

cpp/CMakeLists.txt

@@ -145,6 +145,7 @@ rapids_cpm_init()
 # lags behind.
 ###
 include(cmake/thirdparty/get_raft.cmake)
+include(cmake/thirdparty/get_libcugraphops.cmake)
 
 include(cmake/thirdparty/get_nccl.cmake)
 include(cmake/thirdparty/get_cuhornet.cmake)

cpp/cmake/thirdparty/get_libcugraphops.cmake

@@ -0,0 +1,33 @@
+#=============================================================================
+# Copyright (c) 2022, NVIDIA CORPORATION.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#=============================================================================
+
+function(find_and_configure_cugraphops)
+
+    if(TARGET cugraphops::cugraphops)
+        return()
+    endif()
+
+    rapids_find_generate_module(cugraphops
+        HEADER_NAMES            graph/sampling.h
+        LIBRARY_NAMES           cugraph-ops++
+        INCLUDE_SUFFIXES        cugraph-ops
+    )
+
+    rapids_find_package(cugraphops REQUIRED)
+
+endfunction()
+
+find_and_configure_cugraphops()