Export types, add better error

package.json

@@ -1,20 +1,23 @@
 {
   "name": "serverless-externals-plugin",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "description": "Only include external node modules and their dependencies in Serverless",
   "type": "module",
   "main": "./build/esm/index.js",
   "exports": {
     ".": {
       "require": "./build/cjs/index-cjs.js",
+      "types": "./build/esm/index.d.ts",
       "default": "./build/esm/index.js"
     },
     "./rollup-plugin": {
       "require": "./build/cjs/rollup-plugin.js",
+      "types": "./build/esm/rollup-plugin.d.ts",
       "default": "./build/esm/rollup-plugin.js"
     },
     "./serverless-plugin": {
       "require": "./build/cjs/serverless-plugin.js",
+      "types": "./build/esm/serverless-plugin.d.ts",
       "default": "./build/esm/serverless-plugin.js"
     }
   },

src/rollup-plugin.ts

@@ -47,6 +47,9 @@ const rollupPlugin = (
     name: "serverless-externals-plugin",
     async buildStart() {
       graph = await buildDependencyGraph(rootPath);
+      if (workspaceName && !graph.workspaces.has(workspaceName)) {
+        this.error(`No workspace found for: ${workspaceName}`);
+      }
       main = workspaceName ? resolveLink(graph.edgesOut.get(workspaceName).to) : graph;
       if (workspaceName) {
         const relativeMainInventory = relativeInventoryFromNode(main);
@@ -193,6 +196,7 @@ const rollupPlugin = (
         if (resolvedConfig.packaging?.exclude?.includes(originalImportModuleRoot)) continue;
         const node = mergedInventory.get(`node_modules/${originalImportModuleRoot}`);
         if (!node) {
+          if (originalImportee.startsWith("node:")) continue;
           this.warn(`No module found for: ${prettyJson(originalImportee)}`);
           continue;
         }