Duplicate uv cache directories created: `.uv_cache` and `.uv-cache`

[ruziniuuuuu]

Summary

When using uv to manage Python dependencies, the tool creates two cache directories in the project root: .uv_cache/ and .uv-cache/. The difference is only the underscore vs. hyphen. This duplication is confusing and it is unclear which directory is the authoritative cache path.

Steps to Reproduce

1. Initialize a project that uses uv for dependency management.
2. Run uv sync (or other commands that populate the cache).
3. Inspect the project root.

Expected Behavior

uv should create only a single cache directory (either .uv_cache or .uv-cache) and reuse it consistently.

Actual Behavior

Both .uv_cache/ and .uv-cache/ directories appear with similar contents, leading to confusion about which one is intended.

Platform

Ubuntu22.04, x86-64

Version

uv 0.8.22

Python version

python3.10

[charliermarsh]

Do you have UV_CACHE_DIR set? I don't think uv creates a directory with either of those names.

[ruziniuuuuu]

Do you have UV_CACHE_DIR set? I don't think uv creates a directory with either of those names.

No.