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pino-caller

npm version Build Status Coverage Status js-standard-style

Description

pino-caller is a wrapper for pino which adds the call site of each log message to the log output. This can be useful when developing with large codebases in order to locate the exact point where pino is invoked.

Install

For Pino v4 and below use the v2 line, which can be installed with the @legacy tag:

npm install pino-caller@legacy

For Pino v5 and above use the v3+ line, which will install using the usual command:

npm install pino-caller

WARNING: THIS IS A DEVELOPMENT TOOL AVOID PRODUCTION USE!

Usage

Basic

'use strict'

const pino = require('pino')() // it will print as usual
const pinoCaller = require('pino-caller')(pino) // it will print also the calling site

pinoCaller.info('info1')
pinoCaller.error('error1')
pinoCaller.debug('debug1')

Advanced

'use strict'
// dynamically load the plugin if in development environment, output paths relative to __dirname
const pino = process.env.NODE_ENV === 'development' ? require('pino-caller')(require('pino')(), { relativeTo: __dirname }) : require('pino')()

pino.info('info1')
pino.error('error1')
pino.debug('debug1')

You can find also a working example in the examples directory and you can run it with npm run example

Options
  • relativeTo - Remove path prefixes from log messages to make them easier to read.
  • stackAdjustment - For those who've wrapped pino, make pino-caller move N stackframes up to get a meaningful message.
'use strict'
const pino = require('pino')()
const pinoCaller = require('pino-caller')(pino, { relativeTo: __dirname, stackAdjustment: 1 })

// People who have wrapped pino like in the contrived example below 
// will want to use stackAdjustment.
// Most people will NOT need this.  See issue #90 for details.
const log = {
  info: function(message) { pinoCaller.info(message) }
}

Example output

╭─phra at debian in /home/phra/git/pino-caller (master ✔)
╰─λ npm run example

> [email protected] example /home/phra/git/pino-caller
> env NODE_ENV=development node examples/index.js

{"pid":44837,"hostname":"debian","level":30,"time":1487873713227,"msg":"hello from the module!","caller":"Object.<anonymous> (/home/phra/git/pino-caller/examples/module.js:4:12)","v":1}
{"pid":44837,"hostname":"debian","level":30,"time":1487873713230,"msg":"info1","caller":"Object.<anonymous> (index.js:8:12)","v":1}
{"pid":44837,"hostname":"debian","level":50,"time":1487873713230,"msg":"error1","caller":"Object.<anonymous> (index.js:9:12)","v":1}