Fix a panic during wwctl node list --ipmi for nodes with no ipmi configuration. #1847

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

internal/app/wwctl/node/list/main_test.go

@@ -187,6 +187,18 @@ nodes:
     profiles:
     - default
 `,
+		},
+		{
+			name:    "node list with no ipmi data",
+			args:    []string{"--ipmi"},
+			wantErr: false,
+			stdout: `
+NODE  IPMI IPADDR  IPMI PORT  IPMI USERNAME  IPMI INTERFACE
+----  -----------  ---------  -------------  --------------
+n1    --           --         --             --`,
+			inDb: `
+nodes:
+  n1: {}`,
 		},
 		{
 			name:    "node list profile with ipmi user",

internal/pkg/api/node/list.go

@@ -64,13 +64,20 @@ func NodeList(nodeGet *wwapiv1.GetNodeList) (nodeList wwapiv1.NodeList, err erro
 		nodeList.Output = append(nodeList.Output,
 			fmt.Sprintf("%s:=:%s:=:%s:=:%s:=:%s", "NODE", "IPMI IPADDR", "IPMI PORT", "IPMI USERNAME", "IPMI INTERFACE"))
 		for _, n := range node.FilterNodeListByName(nodes, nodeGet.Nodes) {
+			ipaddr, port, username, iface := "", "", "", ""
+			if n.Ipmi != nil {
+				ipaddr = n.Ipmi.Ipaddr.String()
+				port = n.Ipmi.Port
+				username = n.Ipmi.UserName
+				iface = n.Ipmi.Interface
+			}
 			nodeList.Output = append(nodeList.Output,
 				fmt.Sprintf("%s:=:%s:=:%s:=:%s:=:%s",
 					n.Id(),
-					n.Ipmi.Ipaddr.String(),
-					n.Ipmi.Port,
-					n.Ipmi.UserName,
-					n.Ipmi.Interface))
+					ipaddr,
+					port,
+					username,
+					iface))
 		}
 	} else if nodeGet.Type == wwapiv1.GetNodeList_Long {
 		nodeList.Output = append(nodeList.Output,