Use fastify-warning

lib/deprecations.js

@@ -0,0 +1,14 @@
+'use strict'
+
+const warning = require('fastify-warning')()
+module.exports = warning
+
+const warnName = 'PinoWarning'
+
+warning.create(warnName, 'PINODEP004', 'bindings.serializers is deprecated, use options.serializers option instead')
+
+warning.create(warnName, 'PINODEP005', 'bindings.formatters is deprecated, use options.formatters option instead')
+
+warning.create(warnName, 'PINODEP006', 'bindings.customLevels is deprecated, use options.customLevels option instead')
+
+warning.create(warnName, 'PINODEP007', 'bindings.level is deprecated, use options.level option instead')

lib/proto.js

@@ -3,6 +3,7 @@
 /* eslint no-prototype-builtins: 0 */
 
 const { EventEmitter } = require('events')
+const warning = require('./deprecations')
 const {
   lsCacheSym,
   levelValSym,
@@ -85,19 +86,19 @@ function child (bindings, options) {
   const instance = Object.create(this)
 
   if (bindings.hasOwnProperty('serializers') === true) {
-    process.emitWarning('bindings.serializers is deprecated, use options.serializers option instead', 'Warning', 'PINODEP004')
+    warning.emit('PINODEP004')
     options.serializers = bindings.serializers
   }
   if (bindings.hasOwnProperty('formatters') === true) {
-    process.emitWarning('bindings.formatters is deprecated, use options.formatters option instead', 'Warning', 'PINODEP005')
+    warning.emit('PINODEP005')
     options.formatters = bindings.formatters
   }
   if (bindings.hasOwnProperty('customLevels') === true) {
-    process.emitWarning('bindings.customLevels is deprecated, use options.customLevels option instead', 'Warning', 'PINODEP006')
+    warning.emit('PINODEP006')
     options.customLevels = bindings.customLevels
   }
   if (bindings.hasOwnProperty('level') === true) {
-    process.emitWarning('bindings.level is deprecated, use options.level option instead', 'Warning', 'PINODEP007')
+    warning.emit('PINODEP007')
     options.level = bindings.level
   }
   if (options.hasOwnProperty('serializers') === true) {

package.json

@@ -100,6 +100,7 @@
   "dependencies": {
     "fast-redact": "^3.0.0",
     "fast-safe-stringify": "^2.0.8",
+    "fastify-warning": "^0.2.0",
     "get-caller-file": "^2.0.5",
     "on-exit-leak-free": "^0.2.0",
     "pino-abstract-transport": "^0.2.0",