Simple MongoDB Log Fixer For People who use windowwwwzzzz

formatLogFile.js

const rl = require("readline");

const FILEPATH = "/Users/Karan.Srivastava/Desktop/Manish Sahni/s1.log";
const OUTPUTFILE = "s1k.log";

const lineReader = rl.createInterface({
  input: require("fs").createReadStream(require("path").normalize(FILEPATH))
})

let prevLine = "";

lineReader.on("line", (line) => {
  if (line.startsWith("2020") && prevLine) {
    require("fs").appendFileSync(OUTPUTFILE, prevLine + require("os").EOL, { encoding: "utf-8" })
    prevLine = "";
    prevLine = line;
  } else {
    prevLine += line
  }
})