[EdgeTPU] Bind EdgeTPUCfg node visibility to Backend

This commit shows edgetpucfg node only if EdgeTPU Backend is registered.

ONE-vscode-DCO-1.0-Signed-off-by: Dayoung Lee <[email protected]>

src/OneExplorer/OneExplorer.ts

@@ -214,15 +214,10 @@ class NodeFactory {
           "Config nodes cannot have attributes"
         );
         const ext = path.extname(fpath);
-        switch (ext) {
-          case ".edgetpucfg": {
-            node = new ConfigNode(uri, parent, "one.editor.edgetpucfg");
-            break;
-          }
-          case ".cfg":
-          default: {
-            node = new ConfigNode(uri, parent);
-          }
+        if (BackendContext.isRegistered("EdgeTPU") && ext === ".edgetpucfg") {
+          node = new ConfigNode(uri, parent, "one.editor.edgetpucfg");
+        } else {
+          node = new ConfigNode(uri, parent);
         }
         break;
       }

src/OneExplorer/OneStorage.ts

@@ -24,6 +24,7 @@ import { Logger } from "../Utils/Logger";
 
 import { ConfigObj } from "./ConfigObject";
 import { Node, NodeType } from "./OneExplorer";
+import { BackendContext } from "../Backend/API";
 
 export { CfgToCfgObjMap as _unit_test_CfgToCfgObjMap };
 
@@ -208,7 +209,9 @@ export class OneStorage {
     };
 
     try {
-      const extList = [".cfg", ".edgetpucfg"];
+      const extList = BackendContext.isRegistered("EdgeTPU")
+        ? [".cfg", ".edgetpucfg"]
+        : [".cfg"];
 
       return roots
         .map((root) =>