Method activate

apps/cli/src/agent/extension-host.ts:368–437

()

	// ==========================================================================

	public async activate(): Promise<void> {
		const bundlePath = path.join(this.options.extensionPath, "extension.js")

		if (!fs.existsSync(bundlePath)) {
			this.restoreConsole()
			throw new Error(`Extension bundle not found at: ${bundlePath}`)
		}

		let storageDir: string | undefined

		if (this.options.ephemeral) {
			this.ephemeralStorageDir = await createEphemeralStorageDir()
			storageDir = this.ephemeralStorageDir
		}

		// Create VSCode API mock.
		this.vscode = createVSCodeAPI(this.options.extensionPath, this.options.workspacePath, undefined, {
			appRoot: CLI_PACKAGE_ROOT,
			storageDir,
		})
		;(global as Record<string, unknown>).vscode = this.vscode
		;(global as Record<string, unknown>).__extensionHost = this

		// Set up module resolution.
		const require = createRequire(import.meta.url)
		const Module = require("module")
		const originalResolve = Module._resolveFilename

		Module._resolveFilename = function (request: string, parent: unknown, isMain: boolean, options: unknown) {
			if (request === "vscode") return "vscode-mock"
			return originalResolve.call(this, request, parent, isMain, options)
		}

		require.cache["vscode-mock"] = {
			id: "vscode-mock",
			filename: "vscode-mock",
			loaded: true,
			exports: this.vscode,
			children: [],
			paths: [],
			path: "",
			isPreloading: false,
			parent: null,
			require: require,
		} as unknown as NodeJS.Module

		try {
			this.extensionModule = require(bundlePath) as ExtensionModule
		} catch (error) {
			Module._resolveFilename = originalResolve

			throw new Error(
				`Failed to load extension bundle: ${error instanceof Error ? error.message : String(error)}`,
			)
		}

		Module._resolveFilename = originalResolve