demo of getting a modules path at runtime

.gitignore

@@ -5,3 +5,4 @@ node_modules
 *.d.ts.map
 coverage
 package-lock.json
+dist/

examples/transport-string/README.md

@@ -0,0 +1,26 @@
+# Transport String Example
+
+This example demonstrates how to use `pino-opentelemetry-transport` by path, leveraging the bundled version of the transport.
+
+The bundled transport is generated by `npm run build` and placed in the `dist` directory. The library exports a `getBuildPath()` helper function to retrieve the absolute path to this file.
+
+Using the build path is useful when:
+
+- You need a single file transport for worker threads.
+- You are bundling your application and want to avoid complex path resolution issues with transports.
+
+## Usage
+
+1. Build the transport (if not already built):
+
+   ```bash
+   npm run build
+   ```
+
+2. Run the example:
+
+   ```bash
+   node examples/transport-string/index.js
+   ```
+
+3. Ensure you have an OpenTelemetry collector running (e.g., via `docker-compose.yaml` in the root).

examples/transport-string/build.js

@@ -0,0 +1,23 @@
+'use strict'
+
+const esbuild = require('esbuild')
+const path = require('path')
+
+const entryPoint = path.join(__dirname, '..', '..', 'lib', 'pino-opentelemetry-transport.mjs')
+
+esbuild.build({
+  entryPoints: [entryPoint],
+  bundle: true,
+  platform: 'node',
+  outdir: path.join(__dirname, '..', '..', 'dist'),
+  format: 'esm',
+  splitting: true,
+  external: ['pino-abstract-transport', 'otlp-logger', 'pino'],
+  outExtension: { '.js': '.mjs' },
+  banner: {
+    js: 'import { createRequire } from "module"; const require = createRequire(import.meta.url);'
+  }
+}).catch(() => process.exit(1))
+
+
+

examples/transport-string/index.mjs

@@ -0,0 +1,23 @@
+'use strict'
+import pino from 'pino'
+
+
+async function main() {
+    const { getBuildPath } = await import('../../lib/pino-opentelemetry-transport.mjs')
+
+    const transport = pino.transport({
+        target: getBuildPath(),
+        options: {
+            resourceAttributes: {
+                'service.name': 'test-service',
+                'service.version': '1.0.0'
+            }
+        }
+    })
+
+    const logger = pino(transport)
+
+    logger.info('test message')
+}
+
+main()

lib/pino-opentelemetry-transport.js → lib/pino-opentelemetry-transport.mjs

@@ -1,8 +1,7 @@
-'use strict'
+import build from 'pino-abstract-transport'
+import { getOtlpLogger } from 'otlp-logger'
+import { toOpenTelemetry } from './opentelemetry-mapper.js'
 
-const build = require('pino-abstract-transport')
-const { getOtlpLogger } = require('otlp-logger')
-const { toOpenTelemetry } = require('./opentelemetry-mapper')
 
 /**
  * Pino OpenTelemetry transport
@@ -14,9 +13,10 @@ const { toOpenTelemetry } = require('./opentelemetry-mapper')
  *
  * @param { Options } opts
  */
-module.exports = async function ({ severityNumberMap, ...loggerOpts } = {}) {
+export default async function ({ severityNumberMap, ...loggerOpts } = {}) {
   const logger = getOtlpLogger(loggerOpts)
 
+
   return build(
     async function (/** @type { AsyncIterable<Bindings> } */ source) {
       const mapperOptions = {
@@ -29,10 +29,17 @@ module.exports = async function ({ severityNumberMap, ...loggerOpts } = {}) {
       }
     },
     {
-      async close () {
+      async close() {
         return logger.shutdown()
       },
       expectPinoConfig: true
     }
   )
 }
+
+export function getBuildPath() {
+  return import.meta.filename
+}
+
+
+

package.json

@@ -2,15 +2,16 @@
   "name": "pino-opentelemetry-transport",
   "version": "3.0.0",
   "description": "OpenTelemetry transport for Pino",
-  "main": "lib/pino-opentelemetry-transport.js",
+  "main": "lib/pino-opentelemetry-transport.mjs",
   "scripts": {
     "validate-and-test": "eslint && borp && tsd",
+    "build": "node examples/transport-string/build.js",
     "test": "npm run validate-and-test",
     "docker-run": "docker compose up",
     "generate-types": "tsc",
     "pretest-ci": "npm run generate-types",
     "pretest": "npm run generate-types",
-    "prepack": "npm run generate-types"
+    "prepack": "npm run generate-types && npm run build"
   },
   "author": "Vladimir Adamic <vladimir.adamic@nearform.com>",
   "repository": "github:pinojs/pino-opentelemetry-transport",
@@ -34,6 +35,7 @@
     "@opentelemetry/sdk-node": "^0.213.0",
     "@types/node": "^25.0.0",
     "borp": "^1.0.0",
+    "esbuild": "^0.27.4",
     "eslint": "^9.39.1",
     "neostandard": "^0.12.2",
     "pino": "^10.1.0",
@@ -50,7 +52,8 @@
     "test"
   ],
   "files": [
+    "lib",
     "types",
-    "*.js"
+    "dist"
   ]
 }

tsconfig.json

@@ -1,5 +1,5 @@
 {
-  "include": ["lib/pino-opentelemetry-transport.js"],
+  "include": ["lib/pino-opentelemetry-transport.mjs"],
   "compilerOptions": {
     "skipLibCheck": true,
     "allowJs": true,