@naturalcycles/nodejs-lib/dist/stream/transform/transformLogProgress.js

Standard library for Node.js

import { Transform } from 'node:stream';
import { progressLogger } from '../progressLogger.js';
/**
 * Pass-through transform that optionally logs progress.
 */
export function transformLogProgress(opt = {}) {
    const { objectMode = true, highWaterMark = 1 } = opt;
    const progress = progressLogger(opt);
    return new Transform({
        objectMode,
        highWaterMark,
        transform(chunk, _, cb) {
            progress.log(chunk);
            cb(null, chunk); // pass-through
        },
        final(cb) {
            progress.done();
            cb();
        },
    });
}