fix: correct local invoke for non node functions

src/pre-local.ts

@@ -1,7 +1,10 @@
 import { EsbuildServerlessPlugin } from '.';
+
 export function preLocal(this: EsbuildServerlessPlugin) {
   this.serviceDirPath = this.buildDirPath;
   this.serverless.config.servicePath = this.buildDirPath;
-  // Set service path as CWD to allow accessing bundled files correctly
-  process.chdir(this.serviceDirPath);
+  // If this is a node function set the service path as CWD to allow accessing bundled files correctly
+  if (this.functions[this.options.function]) {
+    process.chdir(this.serviceDirPath);
+  }
 }

src/tests/pre-local.test.ts

@@ -0,0 +1,39 @@
+import { preLocal } from '../pre-local';
+
+const chdirSpy = jest.spyOn(process, 'chdir').mockImplementation();
+
+afterEach(() => {
+  jest.resetAllMocks();
+});
+
+it('should call chdir with the buildDirPath if the invoked function is a node function', () => {
+  const esbuildPlugin = {
+    buildDirPath: 'workdir/.build',
+    serverless: {
+      config: {},
+    },
+    options: {
+      function: 'hello',
+    },
+    functions: {
+      hello: {},
+    },
+  };
+  preLocal.call(esbuildPlugin);
+  expect(chdirSpy).toBeCalledWith(esbuildPlugin.buildDirPath);
+});
+
+it('should not call chdir if the invoked function is not a node function', () => {
+  const esbuildPlugin = {
+    buildDirPath: 'workdir/.build',
+    serverless: {
+      config: {},
+    },
+    options: {
+      function: 'hello',
+    },
+    functions: {},
+  };
+  preLocal.call(esbuildPlugin);
+  expect(chdirSpy).not.toBeCalled();
+});