Simplify license check

Signed-off-by: Jay Gu <jagu@nvidia.com>

Author: haijieg

.github/workflows/ci.yml

@@ -47,7 +47,7 @@ jobs:
         run: python scripts/cpplint.py
 
       - name: Check license headers (REUSE)
-        run: scripts/check_license.sh
+        run: python scripts/check_license.py
 
       - name: Check inline samples are up to date
         run: python test/tools/inline_samples.py --check

scripts/check_license.py

@@ -0,0 +1,66 @@
+# SPDX-FileCopyrightText: Copyright (c) <2026> NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+import subprocess
+import sys
+
+skip_patterns = [
+    "VERSION",
+    ".svg",
+    "uv.lock",
+    "LICENSES/",
+]
+
+max_lines_to_check = 10
+
+
+def check_license():
+    result = subprocess.run(
+        ["git", "ls-files"],
+        capture_output=True,
+        text=True,
+        check=True,
+    )
+    bad_files = 0
+    num_files = 0
+
+    for filepath in result.stdout.splitlines():
+        if any(s in filepath for s in skip_patterns):
+            continue
+        try:
+            with open(filepath, "r") as f:
+                head = ""
+                for i, line in enumerate(f):
+                    if i >= max_lines_to_check:
+                        break
+                    head += line
+        except (UnicodeDecodeError, OSError):
+            continue
+
+        if not head:
+            continue
+        num_files += 1
+        has_error = False
+        if "SPDX-FileCopyrightText" not in head:
+            print(f"{filepath}: no copyright notice", file=sys.stderr)
+            has_error = True
+        if "SPDX-License-Identifier" not in head:
+            print(f"{filepath}: no license identifier", file=sys.stderr)
+            has_error = True
+        if has_error:
+            bad_files += 1
+
+    if bad_files > 0:
+        print(f"Found {bad_files} files with missing or incomplete license headers",
+              file=sys.stderr)
+        sys.exit(1)
+    elif num_files == 0:
+        print("No input files found!", file=sys.stderr)
+        sys.exit(2)
+    else:
+        print(f"Checked {num_files} files, all OK")
+
+
+if __name__ == "__main__":
+    check_license()

scripts/check_license.sh

@@ -9,7 +9,6 @@ pytest-cov==6.2.1
 pytest-env==1.2.0
 flake8==7.3.0
 pytest-cov==6.2.1
-reuse==5.1.0
 
 numba-cuda[cu13]==0.20.0
 cupy-cuda13x==13.6.0