possible to use directly as a pino transport inside of a node app

[q0rban]

The README provides instructions for using this on the command line. I'm wondering if it's possible to use this inside of a node app directly as a pino transport. Something like:

pino.transport({
  targets: [{
    target: 'pino-gelf',
    options: {
      // ??
    },
  }]
});

[q0rban]

I was able to get this working by creating a module like so:

const build = require('pino-abstract-transport');
const pipeline = require('pino-gelf/lib/pipeline');

/**
 * Provide a GELF Transport for sending logs to Graylog.
 *
 * @param opts
 * @return {*|Transform|Promise<Transform>|(Transform & build.OnUnknown)|Promise<Transform & build.OnUnknown>}
 */
module.exports = function gelfTransport(opts = {}) {
    opts = { port: 12201, customKeys: [], ...opts };

    if (!opts.host) {
        console.error('host is required');
    }

    const pipe = pipeline(opts);

    return build(async function (source) {
        for await (const value of source) {
            try {
                pipe.write({ value });
            } catch (err) {
                console.error(err);
            }
        }
    });
};

Then (given you have a UDP Input in Graylog) you can do:

pino.transport({
  targets: [{
    target: './path/to/gelfTransport.js',
    options: {
      host: 'example.com',
      protocol: 'udp',
    },
  }]
});

Would it make sense for something like this to live in pino-gelf itself?

[jfahrenkrug]

@q0rban This is great, thanks so much! I think it would be great if you could create a PR for this so it can become part of the package.