Truncate long reasons

Author: hongkailiu

pkg/cli/admin/upgrade/status/controlplane.go

@@ -503,7 +503,7 @@ func (d *controlPlaneStatusDisplayData) Write(f io.Writer, detailed bool, now ti
 				if i == 0 {
 					_, _ = table.Write([]byte(o.Name + "\t"))
 					_, _ = table.Write([]byte(shortDuration(now.Sub(o.Condition.LastTransitionTime.Time)) + "\t"))
-					_, _ = table.Write([]byte(reason + "\t"))
+					_, _ = table.Write([]byte(ellipsis(reason, 20) + "\t"))
 					_, _ = table.Write([]byte(line + "\n"))
 				} else {
 					_, _ = table.Write([]byte("\t\t\t" + line + "\n"))
@@ -517,6 +517,17 @@ func (d *controlPlaneStatusDisplayData) Write(f io.Writer, detailed bool, now ti
 	return nil
 }
 
+func ellipsis(s string, maxLen int) string {
+	runes := []rune(s)
+	if len(runes) <= maxLen {
+		return s
+	}
+	if maxLen < 3 {
+		maxLen = 3
+	}
+	return string(runes[0:maxLen-3]) + "..."
+}
+
 const controlPlaneStatusTemplateRaw = `= Control Plane =
 Assessment:      {{ .Assessment }}
 Target Version:  {{ .TargetVersion }}

pkg/cli/admin/upgrade/status/examples/4.16.0-single-node.detailed-output

@@ -7,10 +7,10 @@ Duration:        2m54s (Est. Time Remaining: 1h9m)
 Operator Health: 32 Healthy, 1 Available but degraded
 
 Updating Cluster Operators
-NAME             SINCE   REASON                                                           MESSAGE
-kube-apiserver   2m      NodeInstaller::PetrDoesNotLikeLongLines::WhichTakeTooMuchSpace   NodeInstallerProgressing: 1 node is at revision 8; 0 nodes have achieved new revision 10
-                                                                                          Test line breaks
-                                                                                          New line
+NAME             SINCE   REASON                 MESSAGE
+kube-apiserver   2m      NodeInstaller::Pe...   NodeInstallerProgressing: 1 node is at revision 8; 0 nodes have achieved new revision 10
+                                                Test line breaks
+                                                New line
 
 Control Plane Nodes
 NAME                        ASSESSMENT   PHASE     VERSION                              EST   MESSAGE