windows-latest runner cache path doest not exists

[RomainBrault]

The default cache path is not working on windows runner:

Saving cache path: /tmp/setup-uv-cache
Error: Path Validation Error: Path(s) specified in the action for caching do(es) not exist, hence no cache is being saved.

workflow:

...
      - name: Install uv
        uses: astral-sh/setup-uv@v2
        with:
          enable-cache: true
...

I'm using windows-latest runner

[eifinger]

Can you show your complete workflow? This message usually indicates that the cache got not populated.

[RomainBrault]

  test:
    name: Run tests under Python ${{ matrix.python }} on ${{ matrix.os }}
    needs: check
    runs-on: ${{ matrix.os }}
    environment:
      name: tests
    strategy:
      matrix:
        python:
          - "3.12"
        os:
          - ubuntu-latest
          - macos-latest
          - windows-latest
    steps:
      - name: Check out the repository
        uses: actions/checkout@v4
      - name: Install uv
        uses: astral-sh/setup-uv@v2
        with:
          enable-cache: true
      - name: Install Python
        uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python }}
      - name: Pick environment to run
        run: |
          import os;
          env = "TOXENV=py{}{}-test\n".format(*"${{ matrix.python }}".split("."))
          with open(os.environ["GITHUB_ENV"], mode="a", encoding="utf-8") as file_handler:
              file_handler.write(env)
        shell: python
      - name: Run the test suite
        shell: bash
        run: |
          echo "REPORT_FILE=.tox/test_report.md" >> "$GITHUB_ENV"
          uvx --quiet --no-progress --with tox-uv tox run
      - name: Output reports to the job summary when tests fail
        if: failure()
        shell: bash
        run: |
          if [ -f "$REPORT_FILE" ]; then
            echo "<details><summary>Failed Test Report</summary>" >> $GITHUB_STEP_SUMMARY
            echo "" >> $GITHUB_STEP_SUMMARY
            cat "$REPORT_FILE" >> $GITHUB_STEP_SUMMARY
            echo "" >> $GITHUB_STEP_SUMMARY
            echo "</details>" >> $GITHUB_STEP_SUMMARY
          fi
      - name: Upload coverage data
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: coverage-data-${{ matrix.os }}-${{ matrix.python }}
          path: .tox/.coverage.*
          overwrite: true
          include-hidden-files: true
      - name: Upload test results
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: test-results-${{ matrix.os }}-${{ matrix.python }}
          path: .tox/junit.*
          overwrite: true
          include-hidden-files: true

It gets populated on the ubuntu and macos runner though, and there's no windows specific branching

[eifinger]

Can you run again with the branch changed to windows-default-storage-path?

uses: astral-sh/setup-uv@windows-default-storage-path

[eifinger]

I think the current default /tmp/setup-uv-cache has undefined behavior in Windows, or at least behavior I do not fully understand. We do have tests running on windows which do not show any errors.

Changing to a OS dependant default by using RUNNER_TEMP seems like a better apporach to me.

[RomainBrault]

Looks like it's working :)

https://github.com/whiteprints/test-map-linux-py312-test-open-source/actions/runs/10740884185

It is a test repo, so it might disappear.

[skshetry]

I am also having similar issues on Windows runner. See https://github.com/iterative/dvc/actions/runs/10731598439/job/29762219494#step:12:2.

Post job cleanup.
Pruning cache...
Error: The process 'C:\hostedtoolcache\windows\uv\0.4.6\x86_64\uv.exe' failed with exit code

I think the current default /tmp/setup-uv-cache has undefined behavior in Windows
Changing to a OS dependant default by using RUNNER_TEMP seems like a better apporach to me.

hardlink link type doesn't work if they are on different drives. This may not be a problem for users installing directly with --system (on the contary, this might improve performance), but could make it slow for users that are creating virtualenv in the workspace, which is usually on D:\ drive (RUNNER_TEMP is on C: drive, right?).

I install into system Python environment on some packages, so I have been looking to change the cache directory to somewhere on C:\ drive.

EDIT: RUNNER_TEMP is on D:\ drive. Apologies for the confusion. 🤦🏽‍♂️