feat: add cjsDts to input/output options context

closes #371

Author: sxzz

src/index.ts

@@ -263,6 +263,7 @@ async function getBuildOptions(
     plugins.push(userPlugins)
   }
 
+  cjsDts = !!cjsDts
   const inputOptions = await mergeUserOptions(
     {
       input: entry,
@@ -293,7 +294,7 @@ async function getBuildOptions(
       moduleTypes: loader,
     },
     config.inputOptions,
-    [format],
+    [format, { cjsDts }],
   )
 
   const [entryFileNames, chunkFileNames] = resolveChunkFilename(
@@ -318,7 +319,7 @@ async function getBuildOptions(
       footer: resolveChunkAddon(footer, format),
     },
     config.outputOptions,
-    [format],
+    [format, { cjsDts }],
   )
 
   return {

src/options/types.ts

@@ -98,6 +98,7 @@ export interface Options {
     | ((
         options: InputOptions,
         format: NormalizedFormat,
+        context: { cjsDts: boolean },
       ) => Awaitable<InputOptions | void | null>)
 
   /// output options
@@ -182,6 +183,7 @@ export interface Options {
     | ((
         options: OutputOptions,
         format: NormalizedFormat,
+        context: { cjsDts: boolean },
       ) => Awaitable<OutputOptions | void | null>)
 
   /** @default true */