Migrate upstream models to cugraph-pyg (#3763)

This PR migrates SAGEConv and RGCNConv to cugraph-pyg, in preparation for removing these models from upstream. 
`pylibcugraphops` now becomes a dependency of cugraph-pyg.

Authors:
  - Tingyu Wang (https://github.com/tingyu66)

Approvers:
  - Alex Barghi (https://github.com/alexbarghi-nv)
  - AJ Schmidt (https://github.com/ajschmidt8)

URL: #3763

conda/environments/all_cuda-118_arch-x86_64.yaml

@@ -5,6 +5,7 @@ channels:
 - rapidsai-nightly
 - dask/label/dev
 - pytorch
+- pyg
 - dglteam/label/cu118
 - conda-forge
 - nvidia

conda/environments/all_cuda-120_arch-x86_64.yaml

@@ -5,6 +5,7 @@ channels:
 - rapidsai-nightly
 - dask/label/dev
 - pytorch
+- pyg
 - dglteam/label/cu118
 - conda-forge
 - nvidia

conda/recipes/cugraph-pyg/meta.yaml

@@ -33,6 +33,7 @@ requirements:
     - pytorch >=2.0
     - cupy >=12.0.0
     - cugraph ={{ version }}
+    - pylibcugraphops ={{ version }}
     - pyg >=2.3,<2.4
 
 tests:

dependencies.yaml

@@ -199,12 +199,24 @@ files:
     output: conda
     conda_dir: python/cugraph-dgl/conda
     includes:
+      - checks
       - cugraph_dgl_dev
+      - test_python_common
+  cugraph_pyg_dev:
+    matrix:
+      cuda: ["11.8"]
+    output: conda
+    conda_dir: python/cugraph-pyg/conda
+    includes:
+      - checks
+      - cugraph_pyg_dev
+      - test_python_common
 channels:
   - rapidsai
   - rapidsai-nightly
   - dask/label/dev
   - pytorch
+  - pyg
   - dglteam/label/cu118
   - conda-forge
   - nvidia
@@ -498,6 +510,12 @@ dependencies:
           - pytorch>=2.0
           - pytorch-cuda==11.8
           - dgl>=1.1.0.cu*
-          - setuptools
-          - pre-commit
-          - pytest
+  cugraph_pyg_dev:
+    common:
+      - output_types: [conda]
+        packages:
+          - cugraph==23.10.*
+          - pylibcugraphops==23.10.*
+          - pytorch==2.0
+          - pytorch-cuda==11.8
+          - pyg=2.3.1=*torch_2.0.0*cu118*

python/cugraph-dgl/conda/cugraph_dgl_dev_cuda-118.yaml

@@ -5,16 +5,21 @@ channels:
 - rapidsai-nightly
 - dask/label/dev
 - pytorch
+- pyg
 - dglteam/label/cu118
 - conda-forge
 - nvidia
 dependencies:
 - cugraph==23.10.*
 - dgl>=1.1.0.cu*
+- pandas
 - pre-commit
 - pylibcugraphops==23.10.*
 - pytest
+- pytest-benchmark
+- pytest-cov
+- pytest-xdist
 - pytorch-cuda==11.8
 - pytorch>=2.0
-- setuptools
+- scipy
 name: cugraph_dgl_dev_cuda-118

python/cugraph-pyg/conda/cugraph_pyg_dev_cuda-118.yaml

@@ -0,0 +1,25 @@
+# This file is generated by `rapids-dependency-file-generator`.
+# To make changes, edit ../../../dependencies.yaml and run `rapids-dependency-file-generator`.
+channels:
+- rapidsai
+- rapidsai-nightly
+- dask/label/dev
+- pytorch
+- pyg
+- dglteam/label/cu118
+- conda-forge
+- nvidia
+dependencies:
+- cugraph==23.10.*
+- pandas
+- pre-commit
+- pyg=2.3.1=*torch_2.0.0*cu118*
+- pylibcugraphops==23.10.*
+- pytest
+- pytest-benchmark
+- pytest-cov
+- pytest-xdist
+- pytorch-cuda==11.8
+- pytorch==2.0
+- scipy
+name: cugraph_pyg_dev_cuda-118

python/cugraph-pyg/cugraph_pyg/nn/conv/__init__.py

@@ -13,10 +13,14 @@
 
 from .gat_conv import GATConv
 from .gatv2_conv import GATv2Conv
+from .rgcn_conv import RGCNConv
+from .sage_conv import SAGEConv
 from .transformer_conv import TransformerConv
 
 __all__ = [
     "GATConv",
     "GATv2Conv",
+    "RGCNConv",
+    "SAGEConv",
     "TransformerConv",
 ]

python/cugraph-pyg/cugraph_pyg/nn/conv/base.py

@@ -15,10 +15,10 @@
 from typing import Optional, Tuple, Union
 
 from cugraph.utilities.utils import import_optional
+from pylibcugraphops.pytorch import CSC, HeteroCSC
 
 torch = import_optional("torch")
 torch_geometric = import_optional("torch_geometric")
-ops_torch = import_optional("pylibcugraphops.pytorch")
 
 
 class BaseConv(torch.nn.Module):  # pragma: no cover
@@ -74,7 +74,7 @@ def get_cugraph(
         csc: Tuple[torch.Tensor, torch.Tensor, int],
         bipartite: bool = False,
         max_num_neighbors: Optional[int] = None,
-    ) -> ops_torch.CSC:
+    ) -> CSC:
         r"""Constructs a :obj:`cugraph-ops` graph object from CSC representation.
         Supports both bipartite and non-bipartite graphs.
 
@@ -87,22 +87,22 @@ def get_cugraph(
             bipartite (bool): If set to :obj:`True`, will create the bipartite
                 structure in cugraph-ops. (default: :obj:`False`)
             max_num_neighbors (int, optional): The maximum number of neighbors
-                of a target node. It is only effective when operating in a
-                bipartite graph. When not given, will be computed on-the-fly,
-                leading to slightly worse performance. (default: :obj:`None`)
+                of a destination node. When enabled, it allows models to use
+                the message-flow-graph primitives in cugraph-ops.
+                (default: :obj:`None`)
         """
         row, colptr, num_src_nodes = csc
 
         if not row.is_cuda:
             raise RuntimeError(
-                f"'{self.__class__.__name__}' requires GPU-"
-                f"based processing (got CPU tensor)"
+                f"'{self.__class__.__name__}' requires GPU-based processing "
+                f"but got CPU tensor."
             )
 
         if max_num_neighbors is None:
             max_num_neighbors = -1
 
-        return ops_torch.CSC(
+        return CSC(
             offsets=colptr,
             indices=row,
             num_src_nodes=num_src_nodes,
@@ -117,7 +117,7 @@ def get_typed_cugraph(
         num_edge_types: Optional[int] = None,
         bipartite: bool = False,
         max_num_neighbors: Optional[int] = None,
-    ) -> ops_torch.HeteroCSC:
+    ) -> HeteroCSC:
         r"""Constructs a typed :obj:`cugraph` graph object from a CSC
         representation where each edge corresponds to a given edge type.
         Supports both bipartite and non-bipartite graphs.
@@ -135,9 +135,9 @@ def get_typed_cugraph(
             bipartite (bool): If set to :obj:`True`, will create the bipartite
                 structure in cugraph-ops. (default: :obj:`False`)
             max_num_neighbors (int, optional): The maximum number of neighbors
-                of a target node. It is only effective when operating in a
-                bipartite graph. When not given, will be computed on-the-fly,
-                leading to slightly worse performance. (default: :obj:`None`)
+                of a destination node. When enabled, it allows models to use
+                the message-flow-graph primitives in cugraph-ops.
+                (default: :obj:`None`)
         """
         if num_edge_types is None:
             num_edge_types = int(edge_type.max()) + 1
@@ -148,7 +148,7 @@ def get_typed_cugraph(
         row, colptr, num_src_nodes = csc
         edge_type = edge_type.int()
 
-        return ops_torch.HeteroCSC(
+        return HeteroCSC(
             offsets=colptr,
             indices=row,
             edge_types=edge_type,

python/cugraph-pyg/cugraph_pyg/nn/conv/gat_conv.py

@@ -10,16 +10,17 @@
 # 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.
+
 from typing import Optional, Tuple, Union
 
 from cugraph.utilities.utils import import_optional
+from pylibcugraphops.pytorch.operators import mha_gat_n2n
 
 from .base import BaseConv
 
 torch = import_optional("torch")
 nn = import_optional("torch.nn")
 torch_geometric = import_optional("torch_geometric")
-ops_torch = import_optional("pylibcugraphops.pytorch")
 
 
 class GATConv(BaseConv):
@@ -174,9 +175,9 @@ def forward(
                 representation to the desired format.
             edge_attr: (torch.Tensor, optional) The edge features.
             max_num_neighbors (int, optional): The maximum number of neighbors
-                of a target node. It is only effective when operating in a
-                bipartite graph. When not given, will be computed on-the-fly,
-                leading to slightly worse performance. (default: :obj:`None`)
+                of a destination node. When enabled, it allows models to use
+                the message-flow-graph primitives in cugraph-ops.
+                (default: :obj:`None`)
         """
         bipartite = not isinstance(x, torch.Tensor)
         graph = self.get_cugraph(
@@ -210,7 +211,7 @@ def forward(
                 )
             x = self.lin(x)
 
-        out = ops_torch.operators.mha_gat_n2n(
+        out = mha_gat_n2n(
             (x_src, x_dst) if bipartite else x,
             self.att,
             graph,

python/cugraph-pyg/cugraph_pyg/nn/conv/gatv2_conv.py

@@ -10,16 +10,17 @@
 # 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.
+
 from typing import Optional, Tuple, Union
 
 from cugraph.utilities.utils import import_optional
+from pylibcugraphops.pytorch.operators import mha_gat_v2_n2n
 
 from .base import BaseConv
 
 torch = import_optional("torch")
 nn = import_optional("torch.nn")
 torch_geometric = import_optional("torch_geometric")
-ops_torch = import_optional("pylibcugraphops.pytorch")
 
 
 class GATv2Conv(BaseConv):
@@ -207,7 +208,7 @@ def forward(
         else:
             x = self.lin_src(x)
 
-        out = ops_torch.operators.mha_gat_v2_n2n(
+        out = mha_gat_v2_n2n(
             (x_src, x_dst) if bipartite else x,
             self.att,
             graph,