Created
November 26, 2019 02:05
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Node.js pino logger show caller filename and line number
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import path from 'path' | |
import pino from 'pino' | |
const STACKTRACE_OFFSET = 2 | |
const LINE_OFFSET = 7 | |
const { symbols : { asJsonSym} } = pino | |
function traceCaller (pinoInstance) { | |
const get = (target, name) => name === asJsonSym ? asJson : target[name] | |
function asJson (...args) { | |
args[0] = args[0] || Object.create(null) | |
args[0].caller = Error().stack.split('\n').filter(s => !s.includes('node_modules/pino') && !s.includes('node_modules\\pino'))[STACKTRACE_OFFSET].substr(LINE_OFFSET).replace(path.resolve(__dirname, '..'), '') | |
return pinoInstance[asJsonSym].apply(this, args) | |
} | |
return new Proxy(pinoInstance, { get }) | |
} | |
const logger = traceCaller(pino({ | |
level: 'debug', | |
prettyPrint: { | |
colorize: true, | |
} | |
})) |
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Love this! Thanks - thanks - thanks! 👍
As a node ESM version, I had issues with __dirname, also substr() should be replaced by substring()
I'm using
dirname(import.meta.url)
as a workaround, if in a subfolder, you can call dirname twiceHere's my take on traceCaller, I also modernized the pino instance creation since "prettyPrint" is deprecated.