implement expression validation and build script setup in workspace

sample/scripts/build.js

@@ -0,0 +1,48 @@
+/* 批处理脚本 */
+/* 
+    如果有processTree，则先运行prcessTree，如果有返回，则进行后面的针对每个节点运行processNode
+    如果没有定义processTree，则直接针对每个节点运行processNode
+
+    export interface TreeModel {
+      version: string;
+      name: string;
+      desc?: string;
+      export?: boolean;
+      firstid: number;
+      group: string[];
+      import: string[];
+      declvar: VarDef[];
+      root: NodeModel;
+    }
+
+    export interface NodeModel {
+      id: number;
+      name: string;
+      desc?: string;
+      args?: { [key: string]: any };
+      input?: string[];
+      output?: string[];
+      children?: NodeModel[];
+      debug?: boolean;
+      disabled?: boolean;
+      path?: string;
+    }
+
+    interface BuildScript {
+        processTree?(tree: TreeModel, path: string): TreeModel | null;
+
+        processNode?(node: NodeModel, tree: TreeModel): NodeModel | null;
+
+        writeFile?(path: string, tree: TreeModel): void;
+    }
+*/
+({
+  processTree: (tree) => {
+    console.log(`processTree ${tree.name}`);
+    return tree;
+  },
+  processNode: (node, tree) => {
+    console.log(`processNode ${tree.name} ${node.name}#${node.id}`);
+    return node;
+  },
+});