Cherry-pick PR #39599 into release-3.9 (#39601)

Component commits: c8d5b98 Load ETW module from a specified path Co-authored-by: Michael Crane <[email protected]>
microsoft · Jul 14, 2020 · 761a9ed · 761a9ed
1 parent 75d6648
commit 761a9ed
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/src/compiler/perfLogger.ts b/src/compiler/perfLogger.ts
@@ -28,9 +28,11 @@ namespace ts {
     // See https://github.com/microsoft/typescript-etw for more information
     let etwModule;
     try {
-        // require() will throw an exception if the module is not installed
+        const etwModulePath = process.env.TS_ETW_MODULE_PATH ?? "./node_modules/@microsoft/typescript-etw";
+
+        // require() will throw an exception if the module is not found
         // It may also return undefined if not installed properly
-        etwModule = require("@microsoft/typescript-etw");
+        etwModule = require(etwModulePath);
     }
     catch (e) {
         etwModule = undefined;