[BUG] Ty pre-commit hook always fails

[rensortino]

Describe the bug

The pre-commit hook for ty is running checks on all files in the repo, using the entrypoint uvx ty check ..
At this stage, since ty finds errors in other files, committed any file is blocked, even if the files to commit have no errors.

What I did

echo  "# Copyright 2025 - Pruna AI GmbH. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


if __name__ == "__main__":
    exit(0)
" > test.py

git add test.py
git commit -m "test"

Expected behavior

ty pre-commit pass when committing a file {filename} if running ty check {filename} beforehand passes.

Screenshots

Removing possibly-unbound-import = "ignore" from pyproject.toml makes the checks pass on test.py but the pre-commit hook still fails

Removing the pass_filenames field in the .pre-commit.yaml and changing the entry to uvx ty check makes the commit pass.

.pre-commit.yaml:L46

  - repo: local
    hooks:
      - id: ty
        name: type checking using ty
        entry: uvx ty check
        language: system
        types: [python]
        files: \.py$

Environment

• pruna version (commit hash): ad6878e
• python version: 3.11.12
• Operating System: MacOS 15.7.3

Additional context

I am not sure this categorizes as a bug because it is not something related to pruna itself, but it seemed the most fitting category among the available ones

[gsprochette]

Hello @rensortino , thanks for raising the issue. Two things from what I see here:

1. we enforce typing with uv run ty check src/pruna in the github actions, the tests should be skipped. We should update the pre-commit hook and/or pyproject.toml so it can ignore them as well. This seems to be the source of the possibly-missing-attribute errors you're observing.
2. we need to update our ty version which is outdated, which is the reason why you are getting an unknown-rule: the possibly-unbound-import rule no longer exist: I suspect you are using with a recent version of ty? This would require to update the set of rules we use to still get the same checks but with the new naming.

Would you have time to work on any of these two points?

[rensortino]

Hi @gsprochette, thanks for your quick response.

Sure, I can work on it, it should not be too complicated.
For point 2, I don't think I installed a particular version of ty, I just ran uv sync --extra=dev. But I will investigate this and update the ty version in the uv lockfile.