index.js

'use strict'

const debug = require('debug')

;[
  'bar',
  'foo', 
  'foo:error',
  'foo:moduleA',
  'foo:error:moduleA',
  'foo:moduleA:specific'
].forEach(function logStatusOfLogger (ns) {
  const dlogger = debug(ns)
  console.log(`ns: ${dlogger.namespace}, enabled: ${dlogger.enabled}`)
  dlogger(`log statement from ${dlogger.namespace}`)
})

package.json

{
  "dependencies": {
    "debug": "2.6.0",
    "pino-debug": "^1.0.3"
  }
}

preload.js

'use strict'

const pdebug = require('pino-debug')

const auto = !!Number(process.env.PINO_DEBUG_AUTO)

pdebug(null, {
  auto,
  map: {
    bar: 'info',
    foo: 'info',
    'foo:error*': 'error'
  }
})

console.log(`auto enabled: ${auto}`)
console.log(require('debug').map)
console.log()

yarn.lock

# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
# yarn lockfile v1


ansi-styles@^3.1.0:
  version "3.2.0"
  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-3.2.0.tgz#c159b8d5be0f9e5a6f346dab94f16ce022161b88"
  dependencies:
    color-convert "^1.9.0"

chalk@^2.0.1:
  version "2.1.0"
  resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.1.0.tgz#ac5becf14fa21b99c6c92ca7a7d7cfd5b17e743e"
  dependencies:
    ansi-styles "^3.1.0"
    escape-string-regexp "^1.0.5"
    supports-color "^4.0.0"

color-convert@^1.9.0:
  version "1.9.0"
  resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-1.9.0.tgz#1accf97dd739b983bf994d56fec8f95853641b7a"
  dependencies:
    color-name "^1.1.1"

color-name@^1.1.1:
  version "1.1.3"
  resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.3.tgz#a7d0558bd89c42f795dd42328f740831ca53bc25"

core-util-is@~1.0.0:
  version "1.0.2"
  resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"

debug@2.6.0:
  version "2.6.0"
  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.0.tgz#bc596bcabe7617f11d9fa15361eded5608b8499b"
  dependencies:
    ms "0.7.2"

end-of-stream@^1.1.0:
  version "1.4.0"
  resolved "https://registry.yarnpkg.com/end-of-stream/-/end-of-stream-1.4.0.tgz#7a90d833efda6cfa6eac0f4949dbb0fad3a63206"
  dependencies:
    once "^1.4.0"

escape-string-regexp@^1.0.5:
  version "1.0.5"
  resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"

fast-json-parse@^1.0.0:
  version "1.0.3"
  resolved "https://registry.yarnpkg.com/fast-json-parse/-/fast-json-parse-1.0.3.tgz#43e5c61ee4efa9265633046b770fb682a7577c4d"

fast-safe-stringify@^1.0.8, fast-safe-stringify@^1.1.11:
  version "1.2.0"
  resolved "https://registry.yarnpkg.com/fast-safe-stringify/-/fast-safe-stringify-1.2.0.tgz#ebd42666fd18fe4f2ba4f0d295065f3f85cade96"

flatstr@^1.0.4:
  version "1.0.5"
  resolved "https://registry.yarnpkg.com/flatstr/-/flatstr-1.0.5.tgz#5b451b08cbd48e2eac54a2bbe0bf46165aa14be3"

has-flag@^2.0.0:
  version "2.0.0"
  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-2.0.0.tgz#e8207af1cc7b30d446cc70b734b5e8be18f88d51"

inherits@~2.0.3:
  version "2.0.3"
  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"

isarray@~1.0.0:
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"

ms@0.7.2:
  version "0.7.2"
  resolved "https://registry.yarnpkg.com/ms/-/ms-0.7.2.tgz#ae25cf2512b3885a1d95d7f037868d8431124765"

once@^1.3.1, once@^1.4.0:
  version "1.4.0"
  resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
  dependencies:
    wrappy "1"

pino-debug@^1.0.3:
  version "1.0.3"
  resolved "https://registry.yarnpkg.com/pino-debug/-/pino-debug-1.0.3.tgz#64058d857729d757d335eaa602bbf115f74682d1"
  dependencies:
    debug "2.6.0"
    pino "^4.0.2"

pino@^4.0.2:
  version "4.7.1"
  resolved "https://registry.yarnpkg.com/pino/-/pino-4.7.1.tgz#d8208de925065f49c9d4a72f54509a167fe18018"
  dependencies:
    chalk "^2.0.1"
    fast-json-parse "^1.0.0"
    fast-safe-stringify "^1.1.11"
    flatstr "^1.0.4"
    pump "^1.0.2"
    quick-format-unescaped "^1.1.1"
    split2 "^2.0.1"

process-nextick-args@~1.0.6:
  version "1.0.7"
  resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-1.0.7.tgz#150e20b756590ad3f91093f25a4f2ad8bff30ba3"

pump@^1.0.2:
  version "1.0.2"
  resolved "https://registry.yarnpkg.com/pump/-/pump-1.0.2.tgz#3b3ee6512f94f0e575538c17995f9f16990a5d51"
  dependencies:
    end-of-stream "^1.1.0"
    once "^1.3.1"

quick-format-unescaped@^1.1.1:
  version "1.1.1"
  resolved "https://registry.yarnpkg.com/quick-format-unescaped/-/quick-format-unescaped-1.1.1.tgz#e77555ef3e66e105d4039e13ef79201284fee916"
  dependencies:
    fast-safe-stringify "^1.0.8"

readable-stream@^2.1.5:
  version "2.3.3"
  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.3.tgz#368f2512d79f9d46fdfc71349ae7878bbc1eb95c"
  dependencies:
    core-util-is "~1.0.0"
    inherits "~2.0.3"
    isarray "~1.0.0"
    process-nextick-args "~1.0.6"
    safe-buffer "~5.1.1"
    string_decoder "~1.0.3"
    util-deprecate "~1.0.1"

safe-buffer@~5.1.0, safe-buffer@~5.1.1:
  version "5.1.1"
  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.1.tgz#893312af69b2123def71f57889001671eeb2c853"

split2@^2.0.1:
  version "2.1.1"
  resolved "https://registry.yarnpkg.com/split2/-/split2-2.1.1.tgz#7a1f551e176a90ecd3345f7246a0cfe175ef4fd0"
  dependencies:
    through2 "^2.0.2"

string_decoder@~1.0.3:
  version "1.0.3"
  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.0.3.tgz#0fc67d7c141825de94282dd536bec6b9bce860ab"
  dependencies:
    safe-buffer "~5.1.0"

supports-color@^4.0.0:
  version "4.2.1"
  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-4.2.1.tgz#65a4bb2631e90e02420dba5554c375a4754bb836"
  dependencies:
    has-flag "^2.0.0"

through2@^2.0.2:
  version "2.0.3"
  resolved "https://registry.yarnpkg.com/through2/-/through2-2.0.3.tgz#0004569b37c7c74ba39c43f3ced78d1ad94140be"
  dependencies:
    readable-stream "^2.1.5"
    xtend "~4.0.1"

util-deprecate@~1.0.1:
  version "1.0.2"
  resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"

wrappy@1:
  version "1.0.2"
  resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"

xtend@~4.0.1:
  version "4.0.1"
  resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.1.tgz#a5c6d532be656e23db820efb943a1f04998d63af"