Now UI configs supports system parameters with eg. %iot.core.host%

components/device-mgt/org.wso2.carbon.device.mgt.ui/src/main/resources/jaggeryapps/devicemgt/app/modules/conf-reader/main.js

@@ -36,8 +36,23 @@ var conf = function () {
                 } else if ((typeof value === "string") && value.indexOf("%server.ip%") > -1) {
                     var getProperty = require("process").getProperty;
                     return value.replace("%server.ip%", getProperty("carbon.local.ip"));
+                } else {
+                    var paramPattern = new RegExp("%(.*?)%", "g");
+                    var out = value;
+                    while ((matches = paramPattern.exec(value)) !== null) {
+                        // This is necessary to avoid infinite loops with zero-width matches
+                        if (matches.index === paramPattern.lastIndex) {
+                            paramPattern.lastIndex++;
+                        }
+                        if (matches.length == 2) {
+                            var property = process.getProperty(matches[1]);
+                            if (property) {
+                                out = out.replace(new RegExp("%" + matches[1] + "%", "g"), property);
+                            }
+                        }
+                    }
+                    return out;
                 }
-                return value;
             }
         );
         application.put("CONF", conf);