feat(config): Add option to remove empty lines from output

README.md

@@ -144,6 +144,7 @@ Create a `repopack.config.json` file in your project root for custom configurati
 |`output.filePath`| The name of the output file | `"repopack-output.txt"` |
 |`output.headerText`| Custom text to include in the file header |`null`|
 |`output.removeComments`| Whether to remove comments from supported file types | `false` |
+|`output.removeEmptyLines`| Whether to remove empty lines from the output | `false` |
 |`output.topFilesLength`| Number of top files to display in the summary. If set to 0, no summary will be displayed |`5`|
 |`output.showLineNumbers`| Whether to add line numbers to each line in the output |`false`|
 |`ignore.useDefaultPatterns`| Whether to use default ignore patterns |`true`|

src/config/defaultConfig.ts

@@ -4,6 +4,7 @@ export const defaultConfig: RepopackConfigDefault = {
   output: {
     filePath: 'repopack-output.txt',
     removeComments: false,
+    removeEmptyLines: false,
     topFilesLength: 5,
     showLineNumbers: false,
   },

src/types/index.ts

@@ -3,6 +3,7 @@ interface RepopackConfigBase {
     filePath?: string;
     headerText?: string;
     removeComments?: boolean;
+    removeEmptyLines?: boolean;
     topFilesLength?: number;
     showLineNumbers?: boolean;
   };
@@ -16,7 +17,8 @@ export type RepopackConfigDefault = RepopackConfigBase & {
   output: {
     filePath: string;
     headerText?: string;
-    removeComments?: boolean;
+    removeComments: boolean;
+    removeEmptyLines: boolean;
     topFilesLength: number;
     showLineNumbers: boolean;
   };
@@ -31,6 +33,7 @@ export type RepopackConfigFile = RepopackConfigBase & {
     filePath?: string;
     headerText?: string;
     removeComments?: boolean;
+    removeEmptyLines?: boolean;
     topFilesLength?: number;
     showLineNumbers?: boolean;
   };
@@ -45,6 +48,7 @@ export type RepopackConfigCli = RepopackConfigBase & {
     filePath?: string;
     headerText?: string;
     removeComments?: boolean;
+    removeEmptyLines?: boolean;
     topFilesLength?: number;
     showLineNumbers?: boolean;
   };

src/utils/fileHandler.ts

@@ -28,7 +28,7 @@ export async function processFile(
   const encoding = jschardet.detect(buffer).encoding || 'utf-8';
   let content = iconv.decode(buffer, encoding);
 
-  content = preprocessContent(content);
+  content = preprocessContent(content, config);
 
   if (config.output.removeComments) {
     const manipulator = getFileManipulator(filePath);
@@ -40,6 +40,19 @@ export async function processFile(
   return content;
 }
 
-export function preprocessContent(content: string): string {
-  return content.trim();
+export function preprocessContent(content: string, config: RepopackConfigMerged): string {
+  content = content.trim();
+
+  if (config.output.removeEmptyLines) {
+    content = removeEmptyLines(content);
+  }
+
+  return content;
+}
+
+function removeEmptyLines(content: string): string {
+  return content
+    .split('\n')
+    .filter((line) => line.trim() !== '')
+    .join('\n');
 }

tests/core/outputGenerator.test.ts

@@ -13,7 +13,13 @@ describe('outputGenerator', () => {
 
   test('generateOutput should write correct content to file', async () => {
     const mockConfig = createMockConfig({
-      output: { filePath: 'output.txt', topFilesLength: 2, showLineNumbers: false },
+      output: {
+        filePath: 'output.txt',
+        topFilesLength: 2,
+        showLineNumbers: false,
+        removeComments: false,
+        removeEmptyLines: false,
+      },
     });
     const mockPackedFiles = [
       { path: 'file1.txt', content: 'content1' },
@@ -40,6 +46,8 @@ describe('outputGenerator', () => {
         headerText: 'Custom header text',
         topFilesLength: 2,
         showLineNumbers: false,
+        removeComments: false,
+        removeEmptyLines: false,
       },
     });
 

tests/utils/fileHandler.test.ts

@@ -23,8 +23,61 @@ describe('fileHandler', () => {
 
   test('preprocessContent should trim content', () => {
     const content = '  Some content with whitespace  \n';
-    const result = preprocessContent(content);
+    const config = createMockConfig({
+      output: {
+        filePath: 'output.txt',
+        topFilesLength: 2,
+        showLineNumbers: false,
+        removeComments: false,
+        removeEmptyLines: false,
+      },
+    });
+    const result = preprocessContent(content, config);
 
     expect(result).toBe('Some content with whitespace');
   });
+
+  test('preprocessContent should remove empty lines when configured', () => {
+    const content = `
+    Some content
+
+    with empty lines
+
+    in between
+    `;
+    const config = createMockConfig({
+      output: {
+        filePath: 'output.txt',
+        topFilesLength: 2,
+        showLineNumbers: false,
+        removeComments: false,
+        removeEmptyLines: true,
+      },
+    });
+    const result = preprocessContent(content, config);
+
+    expect(result).toBe('Some content\n    with empty lines\n    in between');
+  });
+
+  test('preprocessContent should not remove empty lines when not configured', () => {
+    const content = `
+    Some content
+
+    with empty lines
+
+    in between
+    `;
+    const config = createMockConfig({
+      output: {
+        filePath: 'output.txt',
+        topFilesLength: 2,
+        showLineNumbers: false,
+        removeComments: false,
+        removeEmptyLines: false,
+      },
+    });
+    const result = preprocessContent(content, config);
+
+    expect(result).toBe('Some content\n\n    with empty lines\n\n    in between');
+  });
 });