Add Live Debugger package

Introduce the browser debugger SDK and probe execution pipeline so
browser code can evaluate conditions, capture snapshots, and render
probe messages at runtime. Add Delivery API polling plus sandbox and
performance tooling to support probe delivery and testing.

Author: watson

LICENSE-3rdparty.csv

@@ -37,6 +37,7 @@ dev,@vitejs/plugin-react,MIT,Copyright (c) 2019-present Evan You & Vite Contribu
 dev,@vitejs/plugin-vue,MIT,Copyright (c) 2019-present, Yuxi (Evan) You and Vite contributors
 dev,@module-federation/enhanced,MIT, Copyright (c) 2020 ScriptedAlchemy LLC (Zack Jackson) Zhou Shaw (zhouxiao)
 dev,@vue/test-utils,MIT,Copyright (c) 2021-present vuejs
+dev,acorn,MIT,Copyright (C) 2012-2022 by various contributors (see AUTHORS)
 dev,ajv,MIT,Copyright 2015-2017 Evgeny Poberezkin
 dev,babel-loader,MIT,Copyright (c) 2014-2019 Luís Couto <hello@luiscouto.pt>
 dev,browserstack-local,MIT,Copyright 2016 BrowserStack

eslint-local-rules/disallowSideEffects.js

@@ -29,6 +29,7 @@ const pathsWithSideEffect = new Set([
   `${packagesRoot}/logs/src/entries/main.ts`,
   `${packagesRoot}/rum/src/entries/main.ts`,
   `${packagesRoot}/rum-slim/src/entries/main.ts`,
+  `${packagesRoot}/debugger/src/entries/main.ts`,
 ])
 
 // Those packages are known to have no side effects when evaluated

packages/core/src/domain/configuration/configuration.ts

@@ -276,7 +276,7 @@ export interface InitConfiguration {
    *
    * @internal
    */
-  source?: 'browser' | 'flutter' | 'unity' | undefined
+  source?: 'browser' | 'flutter' | 'unity' | 'dd_debugger' | undefined
 
   /**
    * [Internal option] Additional configuration for the SDK.
@@ -311,6 +311,8 @@ export interface ReplicaUserConfiguration {
   clientToken: string
 }
 
+export type SdkSource = 'browser' | 'flutter' | 'unity'
+
 export interface Configuration extends TransportConfiguration {
   // Built from init configuration
   beforeSend: GenericBeforeSendCallback | undefined
@@ -331,10 +333,14 @@ export interface Configuration extends TransportConfiguration {
 
   // internal
   sdkVersion: string | undefined
-  source: 'browser' | 'flutter' | 'unity'
+  source: SdkSource
   variant: string | undefined
 }
 
+function toSdkSource(source: TransportConfiguration['source']): SdkSource {
+  return source === 'dd_debugger' ? 'browser' : source
+}
+
 function isString(tag: unknown, tagName: string): tag is string | undefined | null {
   if (tag !== undefined && tag !== null && typeof tag !== 'string') {
     display.error(`${tagName} must be defined as a string`)
@@ -398,6 +404,8 @@ export function validateAndBuildConfiguration(
     return
   }
 
+  const transportConfiguration = computeTransportConfiguration(initConfiguration)
+
   return {
     beforeSend:
       initConfiguration.beforeSend && catchUserErrors(initConfiguration.beforeSend, 'beforeSend threw an error:'),
@@ -423,7 +431,8 @@ export function validateAndBuildConfiguration(
     variant: initConfiguration.variant,
     sdkVersion: initConfiguration.sdkVersion,
 
-    ...computeTransportConfiguration(initConfiguration),
+    ...transportConfiguration,
+    source: toSdkSource(transportConfiguration.source),
   }
 }
 

packages/core/src/domain/configuration/endpointBuilder.ts

@@ -8,7 +8,7 @@ import type { InitConfiguration } from './configuration'
 // replaced at build time
 declare const __BUILD_ENV__SDK_VERSION__: string
 
-export type TrackType = 'logs' | 'rum' | 'replay' | 'profile' | 'exposures' | 'flagevaluation'
+export type TrackType = 'logs' | 'rum' | 'replay' | 'profile' | 'exposures' | 'flagevaluation' | 'debugger'
 export type ApiType =
   | 'fetch'
   | 'beacon'

packages/core/src/domain/configuration/transportConfiguration.ts

@@ -11,10 +11,11 @@ export interface TransportConfiguration {
   profilingEndpointBuilder: EndpointBuilder
   exposuresEndpointBuilder: EndpointBuilder
   flagEvaluationEndpointBuilder: EndpointBuilder
+  debuggerEndpointBuilder: EndpointBuilder
   datacenter?: string | undefined
   replica?: ReplicaConfiguration
   site: Site
-  source: 'browser' | 'flutter' | 'unity'
+  source: 'browser' | 'flutter' | 'unity' | 'dd_debugger'
 }
 
 export interface ReplicaConfiguration {
@@ -38,7 +39,7 @@ export function computeTransportConfiguration(initConfiguration: InitConfigurati
 }
 
 function validateSource(source: string | undefined) {
-  if (source === 'flutter' || source === 'unity') {
+  if (source === 'flutter' || source === 'unity' || source === 'dd_debugger') {
     return source
   }
   return 'browser'
@@ -52,6 +53,7 @@ function computeEndpointBuilders(initConfiguration: InitConfiguration) {
     sessionReplayEndpointBuilder: createEndpointBuilder(initConfiguration, 'replay'),
     exposuresEndpointBuilder: createEndpointBuilder(initConfiguration, 'exposures'),
     flagEvaluationEndpointBuilder: createEndpointBuilder(initConfiguration, 'flagevaluation'),
+    debuggerEndpointBuilder: createEndpointBuilder(initConfiguration, 'debugger'),
   }
 }
 

packages/core/src/index.ts

@@ -7,6 +7,7 @@ export {
   isSampleRate,
   buildEndpointHost,
   isIntakeUrl,
+  computeTransportConfiguration,
 } from './domain/configuration'
 export * from './domain/intakeSites'
 export type { TrackingConsentState } from './domain/trackingConsent'
@@ -57,7 +58,15 @@ export {
   SESSION_NOT_TRACKED,
   SessionPersistence,
 } from './domain/session/sessionConstants'
-export type { BandwidthStats, HttpRequest, HttpRequestEvent, Payload, FlushEvent, FlushReason } from './transport'
+export type {
+  Batch,
+  BandwidthStats,
+  HttpRequest,
+  HttpRequestEvent,
+  Payload,
+  FlushEvent,
+  FlushReason,
+} from './transport'
 export {
   createHttpRequest,
   canUseEventBridge,

packages/core/src/transport/index.ts

@@ -2,6 +2,7 @@ export type { BandwidthStats, HttpRequest, HttpRequestEvent, Payload, RetryInfo
 export { createHttpRequest } from './httpRequest'
 export type { BrowserWindowWithEventBridge, DatadogEventBridge } from './eventBridge'
 export { canUseEventBridge, bridgeSupports, getEventBridge, BridgeCapability } from './eventBridge'
+export type { Batch } from './batch'
 export { createBatch } from './batch'
 export type { FlushController, FlushEvent, FlushReason } from './flushController'
 export { createFlushController, FLUSH_DURATION_LIMIT } from './flushController'

packages/debugger/LICENSE

@@ -0,0 +1,201 @@
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packages/debugger/README.md

@@ -0,0 +1,35 @@
+# Browser Live Debugger
+
+Datadog Live Debugger enables you to capture function execution snapshots, evaluate conditions, and collect runtime data from your application without modifying source code.
+
+See the [dedicated Datadog documentation][1] for more details.
+
+## Usage
+
+To start collecting data, add [`@datadog/browser-debugger`][2] to your `package.json` file, then initialize it with:
+
+```js
+import { datadogDebugger } from '@datadog/browser-debugger'
+
+datadogDebugger.init({
+  applicationId: '<DATADOG_APPLICATION_ID>',
+  clientToken: '<DATADOG_CLIENT_TOKEN>',
+  site: '<DATADOG_SITE>',
+  service: 'my-web-application',
+  //  env: 'production',
+  //  version: '1.0.0',
+})
+```
+
+If [Datadog RUM][3] is also initialized on the page, debugger snapshots automatically include RUM context (session, view, user action) without any additional configuration.
+
+## Troubleshooting
+
+Need help? Contact [Datadog Support][4].
+
+<!-- Note: all URLs should be absolute -->
+
+[1]: https://docs.datadoghq.com/tracing/live_debugger/
+[2]: https://www.npmjs.com/package/@datadog/browser-debugger
+[3]: https://docs.datadoghq.com/real_user_monitoring/browser
+[4]: https://docs.datadoghq.com/help/