fix: handle indexing library import when require.main is undefined (#982)

Author: breedloj

server/aws-lsp-codewhisperer/src/shared/localProjectContextController.ts

@@ -13,7 +13,12 @@ import { URI } from 'vscode-uri'
 
 const fs = require('fs').promises
 const path = require('path')
-const LIBRARY_DIR = path.join('//TODO FIXME', 'indexing')
+const LIBRARY_DIR = (() => {
+    if (require.main) {
+        return path.join(dirname(require.main.filename), 'indexing')
+    }
+    return path.join(__dirname, 'indexing')
+})()
 
 export class LocalProjectContextController {
     private static instance: LocalProjectContextController | undefined
@@ -40,11 +45,16 @@ export class LocalProjectContextController {
 
     public async init(vectorLib?: any): Promise<void> {
         try {
-            const vecLib = vectorLib ?? (await import(path.join(LIBRARY_DIR, 'dist', 'extension.js')))
-            const root = this.findCommonWorkspaceRoot(this.workspaceFolders)
-            this._vecLib = await vecLib.start(LIBRARY_DIR, this.clientName, root)
-            await this.buildIndex()
-            LocalProjectContextController.instance = this
+            const libraryPath = path.join(LIBRARY_DIR, 'dist', 'extension.js')
+            const vecLib = vectorLib ?? (await import(libraryPath))
+            if (vecLib) {
+                const root = this.findCommonWorkspaceRoot(this.workspaceFolders)
+                this._vecLib = await vecLib.start(LIBRARY_DIR, this.clientName, root)
+                await this.buildIndex()
+                LocalProjectContextController.instance = this
+            } else {
+                this.log.warn(`Vector library could not be imported from: ${libraryPath}`)
+            }
         } catch (error) {
             this.log.error('Vector library failed to initialize:' + error)
         }