feat: support version/upgrade listing

Closes coop-cloud/organising#130.

pkg/config/app.go

@@ -276,8 +276,8 @@ func SanitiseAppName(name string) string {
 }
 
 // GetAppStatuses queries servers to check the deployment status of given apps
-func GetAppStatuses(appFiles AppFiles) (map[string]string, error) {
-	statuses := map[string]string{}
+func GetAppStatuses(appFiles AppFiles) (map[string]map[string]string, error) {
+	statuses := make(map[string]map[string]string)
 
 	var unique []string
 	servers := make(map[string]struct{})
@@ -299,11 +299,20 @@ func GetAppStatuses(appFiles AppFiles) (map[string]string, error) {
 
 	for range servers {
 		status := <-ch
+		result := make(map[string]string)
 		for _, service := range status.Services {
 			name := service.Spec.Labels[convert.LabelNamespace]
+
 			if _, ok := statuses[name]; !ok {
-				statuses[name] = "deployed"
+				result["status"] = "deployed"
 			}
+
+			labelKey := fmt.Sprintf("coop-cloud.%s.version", name)
+			if version, ok := service.Spec.Labels[labelKey]; ok {
+				result["version"] = version
+			}
+
+			statuses[name] = result
 		}
 	}