chore: fix wheel license packaging issues (#1932)

yzh119 · gemini-code-assist[bot] · web-flow · commit 8d708b23ed47 · 2025-10-14T20:37:45.000-07:00
## 📌 Description setuptools can't properly handle license files under `license/` directory: https://github.com/flashinfer-ai/flashinfer/actions/runs/18483737518/job/52670722434 ``` 400 License-File licenses/LICENSE.cutlass.txt does not exist in distribution file flashinfer_python-0.4.1-py3-none-any.whl at flashinfer_python-0.4.1.dist-info/licenses/licenses/LICENSE.cutlass.txt INFO <html> <head> <title>400 License-File licenses/LICENSE.cutlass.txt does not exist in distribution file flashinfer_python-0.4.1-py3-none-any.whl at flashinfer_python-0.4.1.dist-info/licenses/licenses/LICENSE.cutlass.txt </title> </head> <body> <h1>400 License-File licenses/LICENSE.cutlass.txt does not exist in distribution file flashinfer_python-0.4.1-py3-none-any.whl at flashinfer_python-0.4.1.dist-info/licenses/licenses/LICENSE.cutlass.txt </h1> The server could not comply with the request since it is either malformed or otherwise incorrect.<br/><br/> License-File licenses/LICENSE.cutlass.txt does not exist in distribution file flashinfer_python-0.4.1-py3-none-any.whl at flashinfer_python-0.4.1.dist-info/licenses/licenses/LICENSE.cutlass.txt </body> </html> ERROR HTTPError: 400 Bad Request from https://upload.pypi.org/legacy/ License-File licenses/LICENSE.cutlass.txt does not exist in distribution file flashinfer_python-0.4.1-py3-none-any.whl at flashinfer_python-0.4.1.dist-info/licenses/licenses/LICENSE.cutlass.txt ``` This PR fixes the issue by first copying license files to root. Note: we didn't run into this issue because we only upload sdist instead of wheel to pypi. ## 🔍 Related Issues  ## 🚀 Pull Request Checklist Thank you for contributing to FlashInfer! Before we review your pull request, please make sure the following items are complete. ### ✅ Pre-commit Checks - [x] I have installed `pre-commit` by running `pip install pre-commit` (or used your preferred method). - [x] I have installed the hooks with `pre-commit install`. - [x] I have run the hooks manually with `pre-commit run --all-files` and fixed any reported issues. > If you are unsure about how to set up `pre-commit`, see [the pre-commit documentation](https://pre-commit.com/). ## 🧪 Tests - [x] Tests have been added or updated as needed. - [ ] All tests are passing (`unittest`, etc.). ## Reviewer Notes  --------- Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
diff --git a/build_backend.py b/build_backend.py
@@ -115,6 +115,15 @@ def _prepare_for_wheel():
         shutil.rmtree(_data_dir)
     _create_data_dir(use_symlinks=False)
 
+    # Copy license files from licenses/ to root to avoid nested path in wheel
+    licenses_dir = _root / "licenses"
+    if licenses_dir.exists():
+        for license_file in licenses_dir.glob("*.txt"):
+            shutil.copy2(
+                license_file,
+                _root / f"LICENSE.{license_file.stem.removeprefix('LICENSE.')}.txt",
+            )
+
 
 def _prepare_for_editable():
     # For editable install, use symlinks so changes are reflected immediately
diff --git a/pyproject.toml b/pyproject.toml
@@ -21,7 +21,7 @@ license = "Apache-2.0"
 readme = "README.md"
 urls = { Homepage = "https://github.com/flashinfer-ai/flashinfer" }
 dynamic = ["dependencies", "version"]
-license-files = ["LICENSE", "licenses/*"]
+license-files = ["LICENSE", "LICENSE*.txt"]
 
 [project.scripts]
 flashinfer = "flashinfer.__main__:cli"
