feat(nodejs): bundling with webpack

nodejs/packages/layer/install-externals.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+set -euf -o pipefail
+
+rm -rf ./build/workspace/node_modules
+
+# Space separated list of external NPM packages
+EXTERNAL_PACKAGES=( "import-in-the-middle" )
+
+for EXTERNAL_PACKAGE in "${EXTERNAL_PACKAGES[@]}"
+do
+  echo "Installing external package $EXTERNAL_PACKAGE ..."
+
+  PACKAGE_VERSION=$(npm query "#$EXTERNAL_PACKAGE" \
+    | grep version \
+    | head -1 \
+    | awk -F: '{ print $2 }' \
+    | sed 's/[",]//g')
+
+  echo "Resolved version of the external package $EXTERNAL_PACKAGE: $PACKAGE_VERSION"
+
+  npm install "$EXTERNAL_PACKAGE@$PACKAGE_VERSION" --prefix ./build/workspace --production --ignore-scripts
+
+  echo "Installed external package $EXTERNAL_PACKAGE"
+done

nodejs/packages/layer/package.json

@@ -5,14 +5,19 @@
   "description": "Layer including OpenTelemetry SDK for use with AWS Lambda.",
   "repository": "open-telemetry/opentelemetry-lambda",
   "scripts": {
+    "build": "npm run clean && npm run compile && npm run install-externals && npm run package",
     "clean": "rimraf build/*",
+    "compile:tsc": "tsc --build tsconfig.json",
+    "compile:webpack": "webpack",
+    "compile": "npm run compile:webpack",
+    "copy-js-files": "copyfiles -f 'src/**/*.js' build/workspace && copyfiles 'test/**/*.js' build",
+    "copy-esm-files": "copyfiles -f 'src/**/*.mjs' build/workspace && copyfiles 'test/**/*.mjs' build",
+    "install-externals": "./install-externals.sh",
     "lint": "ESLINT_USE_FLAT_CONFIG=false eslint . --ext .ts",
     "lint:fix": "ESLINT_USE_FLAT_CONFIG=false eslint . --ext .ts --fix",
-    "build": "npm run clean && npm run compile && npm run postcompile",
-    "copy-esm-files": "copyfiles 'src/**/*.mjs' build && copyfiles 'test/**/*.mjs' build",
-    "compile": "tsc -p .",
-    "postcompile": "npm run copy-esm-files && copyfiles 'package*.json' build/workspace/nodejs && npm install --production --ignore-scripts --prefix build/workspace/nodejs && rm build/workspace/nodejs/package.json build/workspace/nodejs/package-lock.json && copyfiles -f 'scripts/*' build/workspace && copyfiles -f 'build/src/*' build/workspace && cd build/workspace && bestzip ../layer.zip *",
-    "pretest": "npm run compile",
+    "package": "cd build/workspace && bestzip ../layer.zip *",
+    "postcompile": "npm run copy-js-files && npm run copy-esm-files && copyfiles -f 'scripts/*' build/workspace && copyfiles -f 'build/src/*.js' build/workspace && copyfiles -f 'build/src/*.mjs' build/workspace",
+    "pretest": "npm run compile:tsc",
     "test:cjs": "mocha 'test/**/*.spec.ts' --exclude 'test/**/*.spec.mjs' --timeout 10000",
     "test:esm": "mocha 'test/**/*.spec.mjs' --exclude 'test/**/*.spec.ts' --timeout 10000",
     "test": "npm run test:cjs && npm run test:esm"
@@ -67,6 +72,11 @@
     "@types/sinon": "^17.0.3",
     "mocha": "^11.0.1",
     "sinon": "^19.0.2",
-    "ts-node": "^10.9.2"
-  }
+    "ts-loader": "^9.5.2",
+    "ts-node": "^10.9.2",
+    "webpack": "^5.97.1",
+    "webpack-cli": "^6.0.1",
+    "webpack-node-externals": "^3.0.0"
+  },
+  "sideEffects": false
 }

nodejs/packages/layer/scripts/otel-handler

@@ -2,7 +2,7 @@
 
 set -ef -o pipefail
 
-export NODE_OPTIONS="${NODE_OPTIONS} --import /opt/loader.mjs --require /opt/wrapper.js"
+export NODE_OPTIONS="${NODE_OPTIONS} --import /opt/init.mjs"
 
 if [[ $OTEL_RESOURCE_ATTRIBUTES != *"service.name="* ]]; then
   export OTEL_RESOURCE_ATTRIBUTES="service.name=${AWS_LAMBDA_FUNCTION_NAME},${OTEL_RESOURCE_ATTRIBUTES}"

nodejs/packages/layer/src/init.mjs

@@ -0,0 +1,9 @@
+const WRAPPER_INIT_START_TIME = Date.now();
+const { default: wrapper } = await import('./wrapper.js');
+await wrapper.init();
+await wrapper.wrap();
+console.log('OpenTelemetry wrapper init completed in', Date.now() - WRAPPER_INIT_START_TIME, 'ms');
+
+const LOADER_INIT_START_TIME = Date.now();
+await import('./loader.mjs');
+console.log('OpenTelemetry loader init completed in', Date.now() - LOADER_INIT_START_TIME, 'ms');