Missing support for .mjs files

[vladaman]

We'd like to move to newer nodejs 18 and 20 which is supported by AWS now. Our setup:

package.json :

{
  "name": "fk-demo-connector",
  "version": "1.0.0",
  "description": "",
  "type": "module",
  "main": "index.mjs",
}

index.mjs :

console.log('Loading function');

export const handler = async (event, context) => {
    console.log('Received event:', JSON.stringify(event, null, 2));
   
    return {};  // Echo back the first key value
    // throw new Error('Something went wrong');
};

Running node-lambda:

> node-lambda run --contextFile ../context.json -f ../.env -j event-init.json

node:internal/errors:496
    ErrorCaptureStackTrace(err);
    ^

Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/home/vlad/workspace/lambda/fk-demo-connector/index.js' imported from /usr/local/lib/node_modules/node-lambda/lib/main.js
    at new NodeError (node:internal/errors:405:5)
    at finalizeResolution (node:internal/modules/esm/resolve:327:11)
    at moduleResolve (node:internal/modules/esm/resolve:946:10)
    at defaultResolve (node:internal/modules/esm/resolve:1132:11)
    at nextResolve (node:internal/modules/esm/loader:163:28)
    at ESMLoader.resolve (node:internal/modules/esm/loader:835:30)
    at ESMLoader.getModuleJob (node:internal/modules/esm/loader:424:18)
    at ESMLoader.import (node:internal/modules/esm/loader:524:22)
    at importModuleDynamically (node:internal/modules/cjs/loader:1188:29)
    at importModuleDynamicallyWrapper (node:internal/vm/module:429:21) {
  code: 'ERR_MODULE_NOT_FOUND'
}

Node.js v18.18.0

Suggestions:

• Allow to parameterize extension index.js -> index.mjs
• Take index.mjs from package.json main key