From 908c0c090dee8adeb8490a49e200166239c12350 Mon Sep 17 00:00:00 2001
From: kricsleo <kricsleo@163.com>
Date: Tue, 17 Dec 2024 16:15:02 +0800
Subject: [PATCH 1/2] fix: fix the `.d.cts` default export type

---
 src/builders/rollup/build.ts       |  4 +++-
 src/builders/rollup/plugins/cjs.ts | 23 +++++++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/src/builders/rollup/build.ts b/src/builders/rollup/build.ts
index 8b3d6f40..3af01e6d 100644
--- a/src/builders/rollup/build.ts
+++ b/src/builders/rollup/build.ts
@@ -9,6 +9,7 @@ import { getRollupOptions } from "./config";
 import { getChunkFilename } from "./utils";
 import { rollupStub } from "./stub";
 import { rollupWatch } from "./watch";
+import { fixCJSExportTypePlugin } from "./plugins/cjs";
 
 export async function rollupBuild(ctx: BuildContext): Promise<void> {
   // Stub mode
@@ -81,7 +82,8 @@ export async function rollupBuild(ctx: BuildContext): Promise<void> {
       ...rollupOptions.plugins,
       dts(ctx.options.rollup.dts),
       removeShebangPlugin(),
-    ];
+      ctx.options.rollup.emitCJS && fixCJSExportTypePlugin()
+    ].filter(Boolean);
 
     await ctx.hooks.callHook("rollup:dts:options", ctx, rollupOptions);
     const typesBuild = await rollup(rollupOptions);
diff --git a/src/builders/rollup/plugins/cjs.ts b/src/builders/rollup/plugins/cjs.ts
index 2bba6d0e..b487c478 100644
--- a/src/builders/rollup/plugins/cjs.ts
+++ b/src/builders/rollup/plugins/cjs.ts
@@ -14,6 +14,29 @@ export function cjsPlugin(_opts?: any): Plugin {
   } as Plugin;
 }
 
+// Ported from https://github.com/egoist/tsup/blob/cd03e1e00ec2bd6676ae1837cbc7e618ab6a2362/src/rollup.ts#L92-L109
+export function fixCJSExportTypePlugin(): Plugin {
+  return {
+    name: "unbuild-fix-cjs-export-type",
+    renderChunk(code, info, opts) {
+      if (
+        info.type !== "chunk" ||
+        !info.fileName.endsWith('.d.cts') ||
+        !info.isEntry ||
+        info.exports?.length !== 1 ||
+        info.exports[0] !== "default"
+      ) {
+        return;
+      }
+
+      return code.replace(
+        /(?<=(?<=[;}]|^)\s*export\s*){\s*([\w$]+)\s*as\s+default\s*}/,
+        `= $1`,
+      );
+    },
+  } as Plugin;
+}
+
 const CJSyntaxRe = /__filename|__dirname|require\(|require\.resolve\(/;
 
 const CJSShim = `

From c8e8445c7d499d4b58e37d9b326dc83dd153b468 Mon Sep 17 00:00:00 2001
From: "autofix-ci[bot]" <114827586+autofix-ci[bot]@users.noreply.github.com>
Date: Tue, 17 Dec 2024 09:12:43 +0000
Subject: [PATCH 2/2] chore: apply automated updates

---
 src/builders/rollup/build.ts       | 2 +-
 src/builders/rollup/plugins/cjs.ts | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/builders/rollup/build.ts b/src/builders/rollup/build.ts
index 3af01e6d..f7c49889 100644
--- a/src/builders/rollup/build.ts
+++ b/src/builders/rollup/build.ts
@@ -82,7 +82,7 @@ export async function rollupBuild(ctx: BuildContext): Promise<void> {
       ...rollupOptions.plugins,
       dts(ctx.options.rollup.dts),
       removeShebangPlugin(),
-      ctx.options.rollup.emitCJS && fixCJSExportTypePlugin()
+      ctx.options.rollup.emitCJS && fixCJSExportTypePlugin(),
     ].filter(Boolean);
 
     await ctx.hooks.callHook("rollup:dts:options", ctx, rollupOptions);
diff --git a/src/builders/rollup/plugins/cjs.ts b/src/builders/rollup/plugins/cjs.ts
index b487c478..5edfa5bd 100644
--- a/src/builders/rollup/plugins/cjs.ts
+++ b/src/builders/rollup/plugins/cjs.ts
@@ -21,7 +21,7 @@ export function fixCJSExportTypePlugin(): Plugin {
     renderChunk(code, info, opts) {
       if (
         info.type !== "chunk" ||
-        !info.fileName.endsWith('.d.cts') ||
+        !info.fileName.endsWith(".d.cts") ||
         !info.isEntry ||
         info.exports?.length !== 1 ||
         info.exports[0] !== "default"