Shared subnets are shown in dropdwon when provisioning GKE clusters

lib/shared/addon/components/cluster-driver/driver-gke/component.js

@@ -686,15 +686,40 @@ export default Component.extend(ClusterDriver, {
         label:  matchedSubnets.length > 0 ? `${ net.name } (subnets available)` : net.name,
       };
     });
-    const sharedSubnets = (get(this, 'sharedSubnets') || []).map((ssn) => {
-      return {
-        ...ssn,
-        group:  'Shared VPC',
-        shared: true,
-        name:   ssn?.network,
-      };
-    })
-    const merged = [...networks, ...sharedSubnets];
+
+    const sharedSubnets = get(this, 'sharedSubnets') || [];
+
+    const dedupeSharedSubnets = () => {
+      // Because the shared network comes in as an array of shared subnetworks,
+      // the network names of the shared networks need to be deduplicated.
+      let alreadyUsedNetworkNames = {};
+      let dedupedSharedSubnets = [];
+
+      for (let i = 0; i < sharedSubnets.length; i++){
+        const ssn = sharedSubnets[i];
+        const networkNamePath = ssn?.network.split('/');
+        const networkLabel = networkNamePath[networkNamePath.length - 1];
+
+        if (alreadyUsedNetworkNames[networkLabel]) {
+          // Avoid adding two entries for the same shared network name
+          continue;
+        }
+
+        alreadyUsedNetworkNames[networkLabel] = ssn;
+
+        dedupedSharedSubnets.push({
+          ...ssn,
+          group:  'Shared VPC',
+          shared: true,
+          name:   ssn?.network,
+          label:  networkLabel
+        });
+      }
+
+      return dedupedSharedSubnets;
+    }
+    const dedupedSharedSubnets = dedupeSharedSubnets(sharedSubnets)
+    const merged = [...networks, ...dedupedSharedSubnets];
 
     return merged;
   }),
@@ -735,9 +760,11 @@ export default Component.extend(ClusterDriver, {
 
       mappedSubnets = sharedVpcs.map((sVpc) => {
         const networkDisplayName = sVpc.network;
+        const subnetworkPath = sVpc.subnetwork.split('/');
+        const subnetworkLabel = subnetworkPath[subnetworkPath.length - 1];
 
         return {
-          label:             `${ sVpc.subnetwork } (${ sVpc.ipCidrRange })`,
+          label:             `${ subnetworkLabel } (${ sVpc.ipCidrRange })`,
           value:             sVpc.subnetwork,
           secondaryIpRanges: sVpc.secondaryIpRanges,
           networkDisplayName

lib/shared/addon/google/service.js

@@ -474,7 +474,6 @@ export default Service.extend({
       //     'subnetwork': 'projects/vpc-host-309518/regions/us-west1/subnetworks/vpc-host-subnet'
       //   }
       // ];
-
       return out;
     } catch (error) {
       return reject([error.body.error ?? error.body]);