CI, packaging: coverage PRs, export main, tox deps

Allow Codecov uploads for pushes and pull requests targeting main by loosening the workflow condition. Export the package's main entry (from .main import main) in dlclivegui.__init__ so the CLI/function is exposed. Add tox and tox-gh-actions to the test extras in pyproject.toml. Tidy tox.ini by adding a comment that linting is handled by pre-commit/format workflow and removing an optional tox-gh-actions helper section.

Author: C-Achard

.github/workflows/testing-ci.yml

@@ -65,7 +65,7 @@ jobs:
           echo '```' >> "$GITHUB_STEP_SUMMARY"
 
       - name: Upload coverage to Codecov
-        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        if: github.event_name == 'push' || (github.event_name == 'pull_request' && github.base_ref == 'main')
         uses: codecov/codecov-action@v5
         with:
           files: ./coverage.xml

dlclivegui/__init__.py

@@ -7,6 +7,7 @@
     MultiCameraSettings,
     RecordingSettings,
 )
+from .main import main
 
 __all__ = [
     "ApplicationSettings",

pyproject.toml

@@ -60,6 +60,8 @@ test = [
   "pytest-cov>=4",
   "pytest-mock>=3.10",
   "pytest-qt>=4.2",
+  "tox",
+  "tox-gh-actions",
 ]
 tf = [
   "deeplabcut-live[tf]==1.1",

tox.ini

@@ -32,6 +32,7 @@ passenv =
     WAYLAND_DISPLAY
     XDG_RUNTIME_DIR
 
+; Linting already covered by pre-commit hooks and format.yml workflow
 ; [testenv:lint]
 ; description = Ruff linting/format checks (matches pyproject.toml config)
 ; skip_install = true
@@ -41,8 +42,6 @@ passenv =
 ;     ruff check .
 ;     ruff format --check .
 
-# Optional helper if you use tox-gh-actions to map GitHub's python-version to tox envs.
-# Requires: pip install tox-gh-actions
 [gh-actions]
 python =
     3.10: py310