VOL-2170 add common method the output GRPC status error
Change-Id: Ibc48cb087cd73f981542bcb137bdb4f213fa7e8d
diff --git a/internal/pkg/commands/error.go b/internal/pkg/commands/error.go
new file mode 100644
index 0000000..ff641d3
--- /dev/null
+++ b/internal/pkg/commands/error.go
@@ -0,0 +1,51 @@
+/*
+ * Portions copyright 2019-present Open Networking Foundation
+ * Original copyright 2019-present Ciena Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package commands
+
+import (
+ "fmt"
+ "google.golang.org/grpc/status"
+ "regexp"
+ "strings"
+)
+
+var (
+ descRE = regexp.MustCompile(`desc = "(.*)"`)
+ try2RE = regexp.MustCompile(`all SubConns are in TransientFailure, latest connection error: (.*)`)
+ try3RE = regexp.MustCompile(`all SubConns are in TransientFailure, (.*)`)
+)
+
+func ErrorToString(err error) string {
+ if err == nil {
+ return ""
+ }
+
+ if st, ok := status.FromError(err); ok {
+ msg := st.Message()
+ if match := descRE.FindAllStringSubmatch(msg, 1); match != nil {
+ msg = match[0][1]
+ } else if match = try2RE.FindAllStringSubmatch(msg, 1); match != nil {
+ msg = match[0][1]
+ } else if match = try3RE.FindAllStringSubmatch(msg, 1); match != nil {
+ msg = match[0][1]
+ }
+
+ return fmt.Sprintf("%s: %s", strings.ToUpper(st.Code().String()), msg)
+ }
+ return err.Error()
+}