From 4af4923c363701a24b8d84b17f373e3cd10c2f97 Mon Sep 17 00:00:00 2001
From: Will Temple <witemple@microsoft.com>
Date: Fri, 7 Jul 2023 13:17:15 -0400
Subject: [PATCH] [dev-tool] Honor exports when bundling. (#26432)

This package modifies the bundling logic slightly so that after checking
for a package.json `main` field it will also look at the package.json
`exports["."].require` field.
---
 common/tools/dev-tool/src/commands/run/bundle.ts | 2 +-
 common/tools/dev-tool/src/util/resolveProject.ts | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/common/tools/dev-tool/src/commands/run/bundle.ts b/common/tools/dev-tool/src/commands/run/bundle.ts
index 3e69039ccec8..8590470b173e 100644
--- a/common/tools/dev-tool/src/commands/run/bundle.ts
+++ b/common/tools/dev-tool/src/commands/run/bundle.ts
@@ -70,7 +70,7 @@ export default leafCommand(commandInfo, async (options) => {
 
     try {
       const bundle = await rollup.rollup(baseConfig);
-      const cjsOutput = info.packageJson.main;
+      const cjsOutput = info.packageJson.main ?? info.packageJson.exports?.["."]?.require;
       if (!cjsOutput) {
         throw new Error("Expecting valid main entry");
       }
diff --git a/common/tools/dev-tool/src/util/resolveProject.ts b/common/tools/dev-tool/src/util/resolveProject.ts
index cbd2ad8418ed..7a094703d8d9 100644
--- a/common/tools/dev-tool/src/util/resolveProject.ts
+++ b/common/tools/dev-tool/src/util/resolveProject.ts
@@ -31,6 +31,14 @@ declare global {
     description: string;
     main: string;
     types: string;
+    exports?: {
+      [path: string]: {
+        import?: string;
+        require?: string;
+        types?: string;
+        [extraTypes: `types@${string}`]: string;
+      }
+    },
     typesVersions?: {
       [k: string]: {
         [k: string]: string[];