CI: expose test logs

Needed to debug test failures

.github/workflows/go.yml

@@ -26,3 +26,10 @@ jobs:
       - name: Test
         run: |
           ./goclean.sh
+      - name: Upload logs if tests failed
+        if: failure()
+        uses: actions/upload-artifact@0b7f8abb1508181956e8e162db84b466c27e18ce # v3.1.2
+        with:
+          name: ${{matrix.go}}-test-logs
+          path: /tmp/br*
+

internal/e2etests/e2e_test.go

@@ -189,8 +189,20 @@ func (ts *testScaffold) newClientWithOpts(name string, rootDir string,
 	logBknd := func(subsys string) slog.Logger { return slog.Disabled }
 	if ts.showLog {
 		logBknd = testutils.TestLoggerBackend(ts.t, name)
-		dbLog = logBknd("FSDB")
+	} else {
+		logf, err := os.Create(filepath.Join(rootDir, "applog.log"))
+		if err != nil {
+			ts.t.Fatalf("unable to create log file: %v", err)
+		}
+		bknd := slog.NewBackend(logf)
+		logBknd = func(subsys string) slog.Logger {
+			logger := bknd.Logger(subsys)
+			logger.SetLevel(slog.LevelTrace)
+			return logger
+		}
+		ts.t.Cleanup(func() { logf.Close() })
 	}
+	dbLog = logBknd("FSDB")
 
 	idIniter := func(context.Context) (*zkidentity.FullIdentity, error) {
 		c := new(zkidentity.FullIdentity)