ci: configure tox to pass environment variables for PyTorch

tox's isolated environment blocks `USERNAME` by default, causing
PyTorch's `torch._inductor` to fail during import when it calls
`getpass.getuser()` for cache directory setup.

Pass through username and temp directory variables, and set
`TORCHINDUCTOR_CACHE_DIR` explicitly to avoid the getpass call.

Fixes Windows Python 3.10/3.11 test failures.

Author: qin-yu

.github/workflows/test_and_deploy.yml

@@ -3,7 +3,7 @@
 
 name: tests
 
-on: 
+on:
   push:
     branches:
       - main
@@ -14,7 +14,7 @@ on:
       - main
   workflow_dispatch:
 
-jobs:          
+jobs:
   test:
     name: ${{ matrix.platform }} py${{ matrix.python-version }}
     runs-on: ${{ matrix.platform }}
@@ -26,10 +26,12 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
@@ -45,21 +47,25 @@ jobs:
 
   deploy:
     # this will run when you have tagged a commit, starting with "v*"
-    # and requires that you have put your twine API key in your 
+    # and requires that you have put your twine API key in your
     # github secrets (see readme for details)
     needs: [test]
     runs-on: ubuntu-latest
     if: contains(github.ref, 'tags')
+
     steps:
       - uses: actions/checkout@v4
+
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: "3.x"
+
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
           pip install -U setuptools setuptools_scm wheel twine
+
       - name: Build and publish
         env:
           TWINE_USERNAME: __token__

tox.ini

@@ -8,32 +8,44 @@ python =
     3.10: py310
     3.11: py311
 fail_on_no_env = True
-    
+
 [gh-actions:env]
 PLATFORM =
     ubuntu-latest: linux
     macos-latest: macos
     windows-latest: windows
 
 [testenv]
-platform = 
+platform =
     macos: darwin
     linux: linux
     windows: win32
-passenv = 
+passenv =
     CI
     GITHUB_ACTIONS
     DISPLAY,XAUTHORITY
     NUMPY_EXPERIMENTAL_ARRAY_FUNCTION
     PYVISTA_OFF_SCREEN
+    USERNAME
+    USER
+    LOGNAME
+    LNAME
+    TEMP
+    TMP
+    TMPDIR
+    TORCHINDUCTOR_CACHE_DIR
+setenv =
+    windows: TORCHINDUCTOR_CACHE_DIR = {env:TEMP}{/}torchinductor
+    macos:   TORCHINDUCTOR_CACHE_DIR = {env:TMPDIR}{/}torchinductor
+    linux:   TORCHINDUCTOR_CACHE_DIR = {env:TMPDIR:/tmp}{/}torchinductor
 extras = gui
-deps = 
+deps =
     .[gui]
     py
     pytest
     pytest-cov
     pytest-xvfb
 # ignoring contrib tests for now
-commands = 
+commands =
     #linux: apt-get update && apt-get install libgl1
     pytest -vv -rA --color=yes --cov=cellpose --cov-report=xml --ignore=tests/contrib --durations=0