Include libtensor headers in dpnp package distribution (#2915)

This PR fixes missing libtensor headers in the installed dpnp package
#2909

During the migration from `dpctl.tensor` to `dpnp.tensor` libtensor
header files were not added to `package_data` so they were not included
in the final package.

This PR adds the missing libtensor include paths to `setup.py`

Author: vlad-perevezentsev

CHANGELOG.md

@@ -29,6 +29,7 @@ This release is compatible with NumPy 2.4.5.
 * Fixed `conda build` command syntax in GitHub workflows and documentation to use `conda-build` [#2888](https://github.com/IntelPython/dpnp/pull/2888)
 * Fixed incorrect `dpnp.tensor.acosh` result for `complex(±0, NaN)` special case to match the Python Array API specification [#2914](https://github.com/IntelPython/dpnp/pull/2914)
 * Fixed fork PR documentation workflow failures by implementing conditional publishing strategy: upstream PRs publish to GitHub Pages with comment, fork PRs upload artifacts [#2910](https://github.com/IntelPython/dpnp/pull/2910)
+* Fixed missing `libtensor` headers in the installed `dpnp` package [#2915](https://github.com/IntelPython/dpnp/pull/2915)
 
 ### Security
 

dpnp/__main__.py

@@ -39,10 +39,19 @@ def _dpnp_dir() -> str:
     return abs_dpnp_dir
 
 
+def get_include_dir() -> str:
+    """Returns path to dpnp include directory containing dpnp4pybind11.hpp"""
+    return os.path.join(_dpnp_dir(), "backend", "include")
+
+
+def print_include_flags() -> None:
+    """Prints include flags for dpnp headers"""
+    print("-I " + get_include_dir())
+
+
 def get_tensor_include_dir() -> str:
     """Prints path to dpnp libtensor include directory"""
-    dpnp_dir = _dpnp_dir()
-    libtensor_dir = os.path.join(dpnp_dir, "tensor", "libtensor", "include")
+    libtensor_dir = os.path.join(_dpnp_dir(), "tensor", "libtensor", "include")
     return libtensor_dir
 
 
@@ -55,6 +64,16 @@ def print_tensor_include_flags() -> None:
 def main() -> None:
     """Main entry-point."""
     parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "--includes",
+        action="store_true",
+        help="Include flags for dpnp headers.",
+    )
+    parser.add_argument(
+        "--include-dir",
+        action="store_true",
+        help="Path to dpnp include directory.",
+    )
     parser.add_argument(
         "--tensor-includes",
         action="store_true",
@@ -68,6 +87,10 @@ def main() -> None:
     args = parser.parse_args()
     if not sys.argv[1:]:
         parser.print_help()
+    if args.includes:
+        print_include_flags()
+    if args.include_dir:
+        print(get_include_dir())
     if args.tensor_includes:
         print_tensor_include_flags()
     if args.tensor_include_dir:

dpnp/tests/test_cli_options.py

@@ -2,6 +2,24 @@
 import sys
 
 
+def test_includes():
+    res = subprocess.run(
+        [sys.executable, "-m", "dpnp", "--includes"],
+        capture_output=True,
+    )
+    assert res.returncode == 0
+    assert res.stdout
+    flags = res.stdout.decode("utf-8")
+    res = subprocess.run(
+        [sys.executable, "-m", "dpnp", "--include-dir"],
+        capture_output=True,
+    )
+    assert res.returncode == 0
+    assert res.stdout
+    include_dir = res.stdout.decode("utf-8")
+    assert flags == "-I " + include_dir
+
+
 def test_tensor_includes():
     res = subprocess.run(
         [sys.executable, "-m", "dpnp", "--tensor-includes"],

setup.py

@@ -52,6 +52,9 @@
             "libdpnp_backend_c.so",
             "dpnp_backend_c.lib",
             "dpnp_backend_c.dll",
+            "tensor/libtensor/include/kernels/*.h*",
+            "tensor/libtensor/include/kernels/*/*.h*",
+            "tensor/libtensor/include/utils/*.h*",
             "tests/*.*",
             "tests/tensor/*.py",
             "tests/tensor/*/*.py",