Enhancing your logs with pino-pretty: Including file names in each log line

Looking to include file name in the pino-pretty output line,
currently using: 

const pino = require('pino');
const logger = pino({
    prettyPrint: {
        colorize: true,
        translateTime: 'yyyy-mm-dd HH:MM:ss',
        ignore: 'pid,hostname'
    }
})

Resulting output:

[2020-05-14 16:25:45] INFO : Network is private

Desired output:

[2020-05-14 16:25:45] INFO myFile.js: Network is private

Trying to achieve this by using the customPrettifiers option but haven't been successful so far,
for example attempted solution: 

const pino = require('pino');
const path = require('path');
const logger = pino({
    prettyPrint: {
        colorize: true,
        translateTime: 'yyyy-mm-dd HH:MM:ss',
        ignore: 'pid,hostname',
        customPrettifiers: {
            filename: path.basename(__filename)
        }
    }
})
node.jspinojs

Answer №1

If you're looking for a solution that comes close to what you need, consider the following code snippet:

const path = require('path');
const pino = require('pino');
const logger = pino({
  prettyPrint: {
    // Includes the filename property in the message
    messageFormat: '{filename}: {msg}',

    // Excludes 'filename' from displaying beneath each log
    ignore: 'pid,hostname,filename', 
  },
}).child({ filename: path.basename(__filename) });

Keep in mind that it's not possible to style the filename differently from the message, but this workaround should suffice.

For better organization, it might be preferable to create a separate logger.js file where the default pino options are set like so:

// logger.js
const logger = require('pino')({
  prettyPrint: {
    messageFormat: '{filename}: {msg}',
    ignore: 'pid,hostname,filename', 
  },
});
module.exports = logger;

// file_with_logging.js
const parentLogger = require('./logger.js');
const logger = parentLogger.child({ filename: path.basename(__filename) });

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