@marmeon/log

The logger of Marmeon apps: pino behind the core's Logger contract — readable in development, JSON lines in production, with the request's and the job's context in every entry and secrets redacted.

Installation

Part of every new Marmeon app: pnpm create marmeon installs it.

Writing log entries

import { Logger } from '@marmeon/core';

export class NoteImporter {
  readonly #logger: Logger;

  constructor(logger: Logger) {
    this.#logger = logger;
  }

  async import(userId: number, rows: readonly string[]): Promise<void> {
    this.#logger.info('Notes imported', { userId, count: rows.length });
  }
}

Keep the message fixed and put the values into the context, so a log shipper can group and search the entries.

Documentation

• Logging
• Logging: keeping secrets out of the log
• Observability: the log channel

MIT · part of Marmeon