chore: wip

Author: chrisbbreuer

fixtures/output/example-0001.d.ts

@@ -89,3 +89,5 @@ export declare type ComplexUnionIntersection =
   & {
     metadata: Record<string, unknown>
   }
+
+export default dts;

src/extract.ts

@@ -311,7 +311,7 @@ export function processLine(line: string, state: ProcessingState): void {
   }
 
   if (trimmedLine.startsWith('export default')) {
-    state.defaultExport = `\n${trimmedLine};`
+    state.defaultExport = trimmedLine.endsWith(';') ? trimmedLine : `${trimmedLine};`
     return
   }
 
@@ -590,6 +590,16 @@ export function processDeclarationBlock(
     return
   }
 
+  if (
+    declarationWithoutComments.startsWith('export default')
+  ) {
+    // Handle export default statements
+    state.defaultExport = declarationWithoutComments.endsWith(';')
+      ? declarationWithoutComments
+      : `${declarationWithoutComments};`
+    return
+  }
+
   if (
     declarationWithoutComments.startsWith('export const')
     || declarationWithoutComments.startsWith('const')
@@ -1964,18 +1974,24 @@ function getDeclarationType(line: string): 'interface' | 'type' | 'const' | 'fun
  * Format the final output with proper spacing and organization
  */
 function formatOutput(state: ProcessingState): string {
-  const output = state.dtsLines
+  const outputLines = state.dtsLines
     // Remove more than two consecutive empty lines
     .reduce((acc, line, index, arr) => {
       if (line === '' && arr[index - 1] === '' && arr[index - 2] === '') {
         return acc
       }
       return [...acc, line]
     }, [] as string[])
-    .join('\n')
 
-  // Ensure file ends with single newline
-  return `${output.trim()}\n`
+  // Ensure file ends with a single newline
+  let output = outputLines.join('\n').trim()
+
+  // Append default export at the end if it exists
+  if (state.defaultExport) {
+    output += `\n\n${state.defaultExport.trim()}`
+  }
+
+  return `${output}\n`
 }
 
 function getIndentation(line: string): string {