ci(win test): deal better with hanging tests

When tests hang, we do not see anything in the output, and the job just
times out after 6 hours (!). To add insult to injury, the timeout
prevents the `failed-tests-windows` artifact from being uploaded that is
supposed to help with diagnosing the issue better.

So let's first establish a generous timeout of 20 minutes for the
`win test` matrix jobs (they typically take less than 10 minutes),
and then handle the timed-out tests in addition to the failed ones,
using the presence of a `.out` file in `t/test-results/` combined with
the absence of a `.exit` file as a strong indicator that the
corresponding test timed out.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

.github/workflows/main.yml

@@ -149,13 +149,19 @@ jobs:
       run: tar xf artifacts.tar.gz && tar xf tracked.tar.gz
     - uses: git-for-windows/setup-git-for-windows-sdk@v1
     - name: test
+      id: test
       shell: bash
+      timeout-minutes: 20
       run: . /etc/profile && ci/run-test-slice.sh ${{matrix.nr}} 10
+    - name: handle timed-out tests
+      if: failure() && steps.test.outcome == 'failure' && env.FAILED_TEST_ARTIFACTS == ''
+      shell: bash
+      run: . /etc/profile && . ci/lib.sh && { handle_failed_tests || test $? = 1; }
     - name: print test failures
       if: failure() && env.FAILED_TEST_ARTIFACTS != ''
       shell: bash
       run: ci/print-test-failures.sh
-    - name: Upload failed tests' directories
+    - name: Upload failed/timed-out tests' directories
       if: failure() && env.FAILED_TEST_ARTIFACTS != ''
       uses: actions/upload-artifact@v3
       with:

ci/lib.sh

@@ -180,15 +180,26 @@ handle_failed_tests () {
 }
 
 create_failed_test_artifacts () {
+	# Handle timed-out tests
+	for test_out in t/test-results/*.out
+	do
+		test -f "${test_out%.out}.exit" ||
+		echo timed-out >"${test_out%.out}.exit"
+	done
+
 	mkdir -p t/failed-test-artifacts
 
 	for test_exit in t/test-results/*.exit
 	do
-		test 0 != "$(cat "$test_exit")" || continue
+		case "$(cat "$test_exit")" in
+		0) continue;;
+		timed-out) label="Timed-out";;
+		*) label="Failed";;
+		esac
 
 		test_name="${test_exit%.exit}"
 		test_name="${test_name##*/}"
-		printf "\\e[33m\\e[1m=== Failed test: ${test_name} ===\\e[m\\n"
+		printf "\\e[33m\\e[1m=== ${label} test: ${test_name} ===\\e[m\\n"
 		echo "The full logs are in the 'print test failures' step below."
 		echo "See also the 'failed-tests-*' artifacts attached to this run."
 		cat "t/test-results/$test_name.markup"