update build_locally.py (#1677)

* update build_locally.py

* fix pre-commit

* add comments

---------

Co-authored-by: Anton <100830759+antonwolfy@users.noreply.github.com>

scripts/build_locally.py

@@ -58,12 +58,31 @@ def run(
         cmake_args += [
             "--cmake-executable=" + cmake_executable,
         ]
+
+    # if dpctl is locally built using `script/build_locally.py`, it is needed
+    # to pass the -DDpctl_ROOT=$(python -m dpctl --cmakedir)
+    # if dpctl is conda installed, it is optional to pass this parameter
+    process = subprocess.Popen(
+        ["python", "-m", "dpctl", "--cmakedir"],
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+    )
+    output, error = process.communicate()
+    if process.returncode == 0:
+        cmake_dir = output.decode("utf-8").strip()
+    else:
+        raise RuntimeError(
+            "Failed to retrieve dpctl cmake directory: "
+            + error.decode("utf-8").strip()
+        )
+
     cmake_args += [
         "--build-type=" + build_type,
         "--generator=" + build_system,
         "--",
         "-DCMAKE_C_COMPILER:PATH=" + c_compiler,
         "-DCMAKE_CXX_COMPILER:PATH=" + cxx_compiler,
+        "-DDpctl_ROOT=" + cmake_dir,
     ]
     if verbose:
         cmake_args += [