From 7b457cdbcf322a31bbf9dba1412ba49b2da587eb Mon Sep 17 00:00:00 2001
From: Trent Mick <trentm@gmail.com>
Date: Tue, 17 Oct 2023 01:05:44 -0700
Subject: [PATCH] fix(ioredis): fix instrumentation of ESM-imported ioredis
 (#1694)

Co-authored-by: Marc Pichler <marc.pichler@dynatrace.com>
---
 .../src/instrumentation.ts                    | 28 ++++++++++++-------
 1 file changed, 18 insertions(+), 10 deletions(-)

diff --git a/plugins/node/opentelemetry-instrumentation-ioredis/src/instrumentation.ts b/plugins/node/opentelemetry-instrumentation-ioredis/src/instrumentation.ts
index 94f8b850ed..0753518de3 100644
--- a/plugins/node/opentelemetry-instrumentation-ioredis/src/instrumentation.ts
+++ b/plugins/node/opentelemetry-instrumentation-ioredis/src/instrumentation.ts
@@ -49,7 +49,11 @@ export class IORedisInstrumentation extends InstrumentationBase<any> {
       new InstrumentationNodeModuleDefinition<any>(
         'ioredis',
         ['>1', '<6'],
-        (moduleExports, moduleVersion?: string) => {
+        (module, moduleVersion?: string) => {
+          const moduleExports =
+            module[Symbol.toStringTag] === 'Module'
+              ? module.default // ESM
+              : module; // CommonJS
           diag.debug('Applying patch for ioredis');
           if (isWrapped(moduleExports.prototype.sendCommand)) {
             this._unwrap(moduleExports.prototype, 'sendCommand');
@@ -67,10 +71,14 @@ export class IORedisInstrumentation extends InstrumentationBase<any> {
             'connect',
             this._patchConnection()
           );
-          return moduleExports;
+          return module;
         },
-        moduleExports => {
-          if (moduleExports === undefined) return;
+        module => {
+          if (module === undefined) return;
+          const moduleExports =
+            module[Symbol.toStringTag] === 'Module'
+              ? module.default // ESM
+              : module; // CommonJS
           diag.debug('Removing patch for ioredis');
           this._unwrap(moduleExports.prototype, 'sendCommand');
           this._unwrap(moduleExports.prototype, 'connect');
@@ -84,17 +92,17 @@ export class IORedisInstrumentation extends InstrumentationBase<any> {
    */
   private _patchSendCommand(moduleVersion?: string) {
     return (original: Function) => {
-      return this.traceSendCommand(original, moduleVersion);
+      return this._traceSendCommand(original, moduleVersion);
     };
   }
 
   private _patchConnection() {
     return (original: Function) => {
-      return this.traceConnection(original);
+      return this._traceConnection(original);
     };
   }
 
-  private traceSendCommand = (original: Function, moduleVersion?: string) => {
+  private _traceSendCommand(original: Function, moduleVersion?: string) {
     const instrumentation = this;
     return function (this: RedisInterface, cmd?: IORedisCommand) {
       if (arguments.length < 1 || typeof cmd !== 'object') {
@@ -178,9 +186,9 @@ export class IORedisInstrumentation extends InstrumentationBase<any> {
         throw error;
       }
     };
-  };
+  }
 
-  private traceConnection = (original: Function) => {
+  private _traceConnection(original: Function) {
     const instrumentation = this;
     return function (this: RedisInterface) {
       const config =
@@ -213,5 +221,5 @@ export class IORedisInstrumentation extends InstrumentationBase<any> {
         throw error;
       }
     };
-  };
+  }
 }