chore: wip

fixtures/output/example-1.d.ts

@@ -6,7 +6,7 @@ export declare const config: { [key: string]: string }
 /**
  * Example of interface declaration
  */
-export interface User  {
+export interface User {
   id: number
   name: string
   email: string
@@ -15,7 +15,7 @@ export interface User  {
 /**
  * Example of type declaration
  */
-export interface ResponseData  {
+export interface ResponseData {
   success: boolean
   data: User[]
 }

fixtures/output/example-2.d.ts

@@ -3,13 +3,13 @@
  */
 export declare const settings: { [key: string]: any }
 
-export interface Product  {
+export interface Product {
   id: number
   name: string
   price: number
 }
 
-export interface ApiResponse<T>  {
+export interface ApiResponse<T> {
   status: number
   message: string
   data: T

fixtures/output/example-3.d.ts

@@ -1,12 +1,12 @@
 export declare const endpoints
 
-export interface Order  {
+export interface Order {
   orderId: number
   userId: number
   productIds: number[]
 }
 
-export interface OrderResponse  {
+export interface OrderResponse {
   success: boolean
   order: Order
 }

fixtures/output/example-4.d.ts

@@ -1,6 +1,6 @@
 export declare const apiKeys
 
-export interface AuthResponse  {
+export interface AuthResponse {
   token: string
   expiresIn: number
 }

fixtures/output/example-5.d.ts

@@ -1,12 +1,12 @@
 export declare const defaultHeaders
 
-export interface Comment  {
+export interface Comment {
   id: number
   postId: number
   body: string
 }
 
-export interface CommentsResponse  {
+export interface CommentsResponse {
   comments: Comment[]
 }
 

src/extract.ts

@@ -87,5 +87,5 @@ export async function extractTypeFromSource(filePath: string): Promise<string> {
   }
 
   // Apply final formatting
-  return formatDeclarations(declarations, false)
+  return formatDeclarations(declarations)
 }

src/utils.ts

@@ -32,21 +32,42 @@ export async function checkIsolatedDeclarations(options: DtsGenerationConfig): P
   }
 }
 
-export function formatDeclarations(declarations: string, isConfigFile: boolean): string {
-  if (isConfigFile) {
-    return declarations.trim() + '\n'
-  }
+export function formatDeclarations(declarations: string): string {
+  const lines = declarations.split('\n')
+  const formattedLines = lines.map(line => {
+    // Trim trailing spaces
+    line = line.trimEnd()
 
-  return declarations
-    .replace(/\n{3,}/g, '\n\n')
-    .replace(/;\n/g, '\n')
-    .replace(/export (interface|type) ([^\{]+)\s*\{\s*\n/g, 'export $1 $2 {\n')
-    .replace(/\n\s*\}/g, '\n}')
-    .replace(/\/\*\*\n([^*]*)(\n \*\/)/g, (match, content) => {
-      const formattedContent = content.split('\n').map((line: string) => ` *${line.trim() ? ' ' + line.trim() : ''}`).join('\n')
-      return `/**\n${formattedContent}\n */`
-    })
-    .trim() + '\n'
+    // Handle interface and type declarations
+    if (line.startsWith('export interface') || line.startsWith('export type')) {
+      const parts = line.split('{')
+      if (parts.length > 1) {
+        return `${parts[0].trim()} {${parts[1]}`
+      }
+    }
+
+    // Remove semicolons from the end of lines
+    if (line.endsWith(';')) {
+      line = line.slice(0, -1)
+    }
+
+    return line
+  })
+
+  // Join lines and ensure only one blank line between declarations
+  let result = formattedLines.join('\n')
+  result = result.replace(/\n{3,}/g, '\n\n')
+
+  // Format comments
+  result = result.replace(/\/\*\*\n([^*]*)(\n \*\/)/g, (match, content) => {
+    const formattedContent = content
+      .split('\n')
+      .map(line => ` *${line.trim() ? ' ' + line.trim() : ''}`)
+      .join('\n')
+    return `/**\n${formattedContent}\n */`
+  })
+
+  return result.trim() + '\n'
 }
 
 export function formatComment(comment: string): string {