express-to-lambda/lib/mjs/utils/addHandler.js

Simple package for converting your express application to an AWS Lambda.

import fs from "fs";
export function addHandler(filePath, isCommonJs) {
    return new Promise((resolve, reject) => {
        fs.readFile(filePath, "utf8", (err, data) => {
            if (err)
                return reject(err);
            const exportString = isCommonJs
                ? `\r\nexports.handler = require("express-to-lambda").adapter(app)`
                : `\r\nexport const handler = (import "express-to-lambda").adapter(app)`;
            fs.writeFile(filePath, data.concat(exportString), "utf8", (err) => {
                if (err)
                    return reject(err);
                resolve(undefined);
            });
        });
    });
}