ci: create helpers for formatting errors and notices

Create helpers for formatting errors and notices for GitHub actions,
instead of directly printing the double colons and attributes.

travis-ci/vmtest/helpers.sh

@@ -24,3 +24,23 @@ travis_fold() {
 }
 
 ARCH=$(uname -m)
+
+__print() {
+  local TITLE=""
+  if [[ -n $2 ]]; then
+      TITLE=" title=$2"
+  fi
+  echo "::$1${TITLE}::$3"
+}
+
+# $1 - title
+# $2 - message
+print_error() {
+  __print error $1 $2
+}
+
+# $1 - title
+# $2 - message
+print_notice() {
+  __print notice $1 $2
+}

travis-ci/vmtest/run.sh

@@ -420,9 +420,9 @@ if [[ "${KERNEL}" = 'LATEST' ]]; then
 	"${REPO_ROOT}/${REPO_PATH}/tools/testing/selftests/bpf/test_bpftool_synctypes.py" && true
 	test_results["bpftool"]=$?
 	if [[ ${test_results["bpftool"]} -eq 0 ]]; then
-		echo "::notice title=bpftool_checks::bpftool checks passed successfully."
+		print_notice bpftool_checks "bpftool checks passed successfully."
 	else
-		echo "::error title=bpftool_checks::bpftool checks returned ${test_results["bpftool"]}."
+		print_error bpftool_checks "bpftool checks returned ${test_results["bpftool"]}."
 	fi
 else
 	echo "Consistency checks skipped."