Reducing pymapdl-reader dependency on the mesh module

requirements/requirements_tests.txt

@@ -7,3 +7,5 @@ pytest-cov==3.0.0
 pyvista==0.35.2
 pyansys-tools-report==0.2.2
 vtk==9.0.3
+ansys-dpf-core>=0.4.0
+ansys-dpf-post>=0.2.0

src/ansys/mapdl/core/mapdl_grpc.py

@@ -1576,7 +1576,7 @@ def download(
         self,
         files,
         target_dir=None,
-        chunk_size=DEFAULT_CHUNKSIZE,
+        chunk_size=None,
         progress_bar=None,
         recursive=False,
     ):  # pragma: no cover
@@ -1638,6 +1638,9 @@ def download(
         >>> mapdl.download_project()
 
         """
+        if chunk_size is None:
+            chunk_size = DEFAULT_CHUNKSIZE
+
         if chunk_size > 4 * 1024 * 1024:  # 4MB
             raise ValueError(
                 f"Chunk sizes bigger than 4 MB can generate unstable behaviour in PyMAPDL. "

src/ansys/mapdl/core/mesh_grpc.py

@@ -4,7 +4,19 @@
 import weakref
 
 from ansys.api.mapdl.v0 import ansys_kernel_pb2 as anskernel
-from ansys.mapdl.reader.mesh import Mesh
+
+from ansys.mapdl.core.reader import HAS_DPF_CORE
+
+if HAS_DPF_CORE:
+    from ansys.mapdl.core.reader import DPFMapdlMesh as Mesh
+else:
+    try:
+        from ansys.mapdl.reader.mesh import Mesh
+
+        HAS_PYMAPDL_READER = True
+    except ModuleNotFoundError:
+        HAS_PYMAPDL_READER = False
+
 import numpy as np
 
 from ansys.mapdl.core.common_grpc import DEFAULT_CHUNKSIZE, parse_chunks
@@ -19,7 +31,7 @@ class MeshGrpc(Mesh):
 
     def __init__(self, mapdl):
         """Initialize grpc geometry data"""
-        super().__init__()
+        super().__init__(mapdl)
         if not isinstance(mapdl, MapdlGrpc):  # pragma: no cover
             raise TypeError("Must be initialized using MapdlGrpc class")
         self._mapdl_weakref = weakref.ref(mapdl)

src/ansys/mapdl/core/reader/__init__.py

@@ -0,0 +1,8 @@
+try:
+    from ansys.dpf.core import Model
+
+    HAS_DPF_CORE = True
+except ModuleNotFoundError:
+    HAS_DPF_CORE = False
+
+from .mesh import DPFMapdlMesh