CI: Ensure code coverage is always uploaded

If code coverage is not uploaded on failure, then overall coverage can
suffer mysteriously (e.g., if a mac system failed, then it would appear
as if `backend_macosx.py` was not tested). Codecov would then show
several "indirect changes" that are spurious.

On GitHub Actions, if you don't have any status check function in the
`if` entry, then it is treated as `success() && (whatever else you
had)`, so put in an explicit check.

Azure also had no condition, so defaulted to only-on-success.

Cygwin is only run on `main` and sometimes on PRs, so disable code
coverage reporting from it. That would cause random "reductions" in
coverage for all PRs that don't run it (which is most of them.)

Also, fix the image-cleanup script, which would only run on success
instead of failure, where it would be useful.

.github/workflows/cygwin.yml

@@ -245,9 +245,4 @@ jobs:
         run: |
           xvfb-run pytest-3.${{ matrix.python-minor-version }} -rfEsXR -n auto \
             --maxfail=50 --timeout=300 --durations=25 \
-            --cov-report=xml --cov=lib --log-level=DEBUG --color=yes
-
-      - name: Upload code coverage
-        uses: codecov/codecov-action@v4
-        with:
-          token: ${{ secrets.CODECOV_TOKEN }}
+            --cov-report=term --cov=lib --log-level=DEBUG --color=yes

.github/workflows/tests.yml

@@ -316,6 +316,7 @@ jobs:
             --cov-report=xml --cov=lib --log-level=DEBUG --color=yes
 
       - name: Cleanup non-failed image files
+        if: failure()
         run: |
           function remove_files() {
               local extension=$1
@@ -349,6 +350,7 @@ jobs:
           fi
 
       - name: Filter C coverage
+        if: ${{ !cancelled() && github.event_name != 'schedule' }}
         run: |
           if [[ "${{ runner.os }}" != 'macOS' ]]; then
             lcov --rc lcov_branch_coverage=1 --capture --directory . \
@@ -364,7 +366,7 @@ jobs:
               -instr-profile default.profdata > info.lcov
           fi
       - name: Upload code coverage
-        if: ${{ github.event_name != 'schedule' }}
+        if: ${{ !cancelled() && github.event_name != 'schedule' }}
         uses: codecov/codecov-action@v4
         with:
           name: "${{ matrix.python-version }} ${{ matrix.os }} ${{ matrix.name-suffix }}"

azure-pipelines.yml

@@ -268,11 +268,13 @@ stages:
                 ;;
               esac
             displayName: 'Filter C coverage'
+            condition: succeededOrFailed()
           - bash: |
               bash <(curl -s https://codecov.io/bash) \
                 -n "$PYTHON_VERSION $AGENT_OS" \
                 -f 'coverage.xml' -f 'extensions.xml'
             displayName: 'Upload to codecov.io'
+            condition: succeededOrFailed()
 
           - task: PublishTestResults@2
             inputs: