csv-append/dist/index.esm.js

Append data to a big csv file.

import fs from 'fs';
import csvWriter from 'csv-write-stream';
import pump from 'pump';

const csvAppend = (path, appendToExisting = false) => {
    const writeStream = fs.createWriteStream(path, {
        flags: appendToExisting ? "a" : "w"
    });
    const writer = csvWriter({ sendHeaders: !appendToExisting });
    writer.pipe(writeStream);
    const append = (args) => {
        if (Array.isArray(args)) {
            for (let arg of args) {
                writer.write(arg);
            }
        }
        else {
            writer.write(args);
        }
        return writer;
    };
    const end = () => {
        return new Promise(resolve => {
            pump(writer, writeStream, err => {
                resolve();
            });
            writer.end();
        });
    };
    return {
        append,
        end
    };
};

export default csvAppend;
export { csvAppend };