Fix setup-uv cache warning by specifying pyproject.toml as cache key

[Copilot]

The astral-sh/setup-uv@v5 action defaults to **/uv.lock,**/requirements*.txt as cache invalidation globs, neither of which exist in this repo, producing a warning on every run that the cache will never be invalidated.

Changes

• Added cache-dependency-glob: "**/pyproject.toml" to every setup-uv step with enable-cache: true across all five affected workflows:
  • .github/workflows/ci.yaml
  • .github/workflows/black.yaml
  • .github/workflows/ruff.yaml
  • .github/workflows/codespell.yaml
  • .github/workflows/mdformat.yaml

- name: Install uv
  uses: astral-sh/setup-uv@v5
  with:
    python-version: '3.10'
    enable-cache: true
    cache-dependency-glob: "**/pyproject.toml"

Original prompt

Problem

All GitHub Actions workflows that use astral-sh/setup-uv@v5 with enable-cache: true produce the following warning:

No file matched to [**/uv.lock,**/requirements*.txt]. The cache will never get invalidated. Make sure you have checked out the target repository and configured the cache-dependency-glob input correctly.

This is because the repository does not have a uv.lock or requirements*.txt file. The setup-uv action defaults to looking for those files as cache keys, but this project uses pyproject.toml for dependency metadata.

Affected Files

The following five workflow files all have this issue:

• .github/workflows/codespell.yaml
• .github/workflows/ci.yaml
• .github/workflows/black.yaml
• .github/workflows/ruff.yaml
• .github/workflows/mdformat.yaml

Fix

Add cache-dependency-glob: "**/pyproject.toml" to every astral-sh/setup-uv@v5 step that has enable-cache: true. This tells the action to use pyproject.toml as the cache invalidation key instead of the missing uv.lock/requirements*.txt files.

For example, in codespell.yaml:

      - name: Install uv
        uses: astral-sh/setup-uv@v5
        with:
          python-version: '3.10'
          enable-cache: true
          cache-dependency-glob: "**/pyproject.toml"

Apply this same change to all five affected workflow files at every setup-uv step that includes enable-cache: true.

This pull request was created from Copilot chat.

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