feat: Vendor TraceKit

packages/telemetry/browser-telemetry/package.json

@@ -43,9 +43,6 @@
   "bugs": {
     "url": "https://github.com/launchdarkly/js-core/issues"
   },
-  "dependencies": {
-    "tracekit": "^0.4.6"
-  },
   "devDependencies": {
     "@jest/globals": "^29.7.0",
     "@launchdarkly/js-client-sdk": "0.3.2",

packages/telemetry/browser-telemetry/src/BrowserTelemetryImpl.ts

@@ -1,5 +1,3 @@
-import * as TraceKit from 'tracekit';
-
 /**
  * A limited selection of type information is provided by the browser client SDK.
  * This is only a type dependency and these types should be compatible between
@@ -23,6 +21,7 @@ import makeInspectors from './inspectors';
 import { ParsedOptions, ParsedStackOptions } from './options';
 import randomUuidV4 from './randomUuidV4';
 import parse from './stack/StackParser';
+import { getTraceKit } from './vendor/TraceKit';
 
 // TODO: Use a ring buffer for the breadcrumbs/pending events instead of shifting. (SDK-914)
 
@@ -54,13 +53,18 @@ function safeValue(u: unknown): string | boolean | number | undefined {
 }
 
 function configureTraceKit(options: ParsedStackOptions) {
+  const TraceKit = getTraceKit();
   // Include before + after + source line.
   // TraceKit only takes a total context size, so we have to over capture and then reduce the lines.
   // So, for instance if before is 3 and after is 4 we need to capture 4 and 4 and then drop a line
   // from the before context.
   // The typing for this is a bool, but it accepts a number.
   const beforeAfterMax = Math.max(options.source.afterLines, options.source.beforeLines);
-  (TraceKit as any).linesOfContext = beforeAfterMax * 2 + 1;
+  // The assignment here has bene split to prevent esbuild from complaining about an assigment to
+  // an import. TraceKit exports a single object and the interface requires modifying an exported
+  // var.
+  const anyObj = TraceKit as any;
+  anyObj.linesOfContext = beforeAfterMax * 2 + 1;
 }
 
 export default class BrowserTelemetryImpl implements BrowserTelemetry {

packages/telemetry/browser-telemetry/src/index.ts

@@ -1 +1,11 @@
+import { BrowserTelemetry } from './api/BrowserTelemetry';
+import { Options } from './api/Options';
+import BrowserTelemetryImpl from './BrowserTelemetryImpl';
+import parse from './options';
+
 export * from './api';
+
+export function initializeTelemetry(options?: Options): BrowserTelemetry {
+  const parsedOptions = parse(options || {});
+  return new BrowserTelemetryImpl(parsedOptions);
+}

packages/telemetry/browser-telemetry/src/stack/StackParser.ts

@@ -1,8 +1,7 @@
-import { computeStackTrace } from 'tracekit';
-
 import { StackFrame } from '../api/stack/StackFrame';
 import { StackTrace } from '../api/stack/StackTrace';
 import { ParsedStackOptions } from '../options';
+import { getTraceKit } from '../vendor/TraceKit';
 
 /**
  * In the browser we will not always be able to determine the source file that code originates
@@ -195,7 +194,7 @@ export function getSrcLines(
  * @returns The stack trace for the given error.
  */
 export default function parse(error: Error, options: ParsedStackOptions): StackTrace {
-  const parsed = computeStackTrace(error);
+  const parsed = getTraceKit().computeStackTrace(error);
   const frames: StackFrame[] = parsed.stack.reverse().map((inFrame) => ({
     fileName: processUrlToFileName(inFrame.url, window.location.origin),
     function: inFrame.func,