javascript-obfuscator · tnrich · Feb 26, 2025 · Feb 26, 2025 · Feb 26, 2025 · Feb 28, 2025
diff --git a/README.md b/README.md
@@ -295,6 +295,13 @@ javascript-obfuscator ./dist [options]
 
 javascript-obfuscator ./dist --output ./dist/obfuscated [options]
 // creates a folder structure with obfuscated files under `./dist/obfuscated` path
+
+#### Obfuscate directory recursively and overwrite original files
+
+Usage:
+```sh
+javascript-obfuscator ./dist --dangerously-overwrite true [options]
+// obfuscates all `.js` files under `./dist` directory and overwrites the original files with obfuscated content
 ```
 
 Obfuscation of all `.js` files under input directory. If this directory contains already obfuscated files with `-obfuscated` postfix - these files will ignored.
@@ -457,6 +464,7 @@ Following options are available for the JS Obfuscator:
     --target <string> [browser, browser-no-eval, node]
     --transform-object-keys <boolean>
     --unicode-escape-sequence <boolean>
+    --dangerously-overwrite <boolean>
 ```
 
 <!-- ##options-start## -->

diff --git a/src/cli/JavaScriptObfuscatorCLI.ts b/src/cli/JavaScriptObfuscatorCLI.ts
@@ -445,6 +445,11 @@ export class JavaScriptObfuscatorCLI implements IInitializable {
                 'Allows to enable/disable string conversion to unicode escape sequence',
                 BooleanSanitizer
             )
+            .option(
+                '--dangerously-overwrite <boolean>',
+                'Enables overwriting the original files with obfuscated content',
+                BooleanSanitizer
+            )
             .parse(this.rawArguments);
     }
 
@@ -463,7 +468,9 @@ export class JavaScriptObfuscatorCLI implements IInitializable {
      */
     private processSourceCodeData (sourceCodeData: IFileData[]): void {
         sourceCodeData.forEach(({ filePath, content }: IFileData, index: number) => {
-            const outputCodePath: string = this.obfuscatedCodeFileUtils.getOutputCodePath(filePath);
+            const outputCodePath: string = this.inputCLIOptions.dangerouslyOverwrite
+                ? filePath
+                : this.obfuscatedCodeFileUtils.getOutputCodePath(filePath);
 
             try {
                 Logger.log(

diff --git a/src/cli/utils/ObfuscatedCodeFileUtils.ts b/src/cli/utils/ObfuscatedCodeFileUtils.ts
@@ -36,6 +36,10 @@ export class ObfuscatedCodeFileUtils {
      * @returns {string}
      */
     public getOutputCodePath (filePath: string): string {
+        if (this.options.dangerouslyOverwrite) {
+            return this.getOutputCodePathForOverwrite(filePath);
+        }
+
         const normalizedFilePath: string = path.normalize(filePath);
         const normalizedRawOutputPath: string | null = this.options.output
             ? path.normalize(this.options.output)
@@ -146,4 +150,12 @@ export class ObfuscatedCodeFileUtils {
             encoding: JavaScriptObfuscatorCLI.encoding
         });
     }
+    /**
+     * @param {string} filePath
+     * @returns {string}
+     */
+    private getOutputCodePathForOverwrite (filePath: string): string {
+        return path.normalize(filePath);
+    }
+
 }
diff --git a/src/interfaces/options/ICLIOptions.ts b/src/interfaces/options/ICLIOptions.ts
@@ -1,6 +1,7 @@
 import { IOptions } from './IOptions';
 
 export interface ICLIOptions extends IOptions {
+    readonly dangerouslyOverwrite: boolean;
     readonly config: string;
     readonly exclude: string[];
     readonly identifierNamesCachePath: string;

diff --git a/test/functional-tests/cli/JavaScriptObfuscatorCLI.spec.ts b/test/functional-tests/cli/JavaScriptObfuscatorCLI.spec.ts
@@ -527,6 +527,74 @@ describe('JavaScriptObfuscatorCLI', function (): void {
                     });
                 });
             });
+
+            describe('Variant #5: obfuscation of directory with `--dangerously-overwrite` option', () => {
+                const directoryPath: string = path.join(fixturesDirName, 'directory-obfuscation');
+                const outputFileName1: string = 'foo.js';
+                const outputFileName2: string = 'bar.js';
+                const outputFileName3: string = 'baz.js';
+                const readFileEncoding = 'utf8';
+                const regExp1: RegExp = /^var a1_0x(\w){4,6} *= *0x1;$/;
+                const regExp2: RegExp = /^var a0_0x(\w){4,6} *= *0x2;$/;
+
+                let outputFixturesFilePath1: string,
+                    outputFixturesFilePath2: string,
+                    outputFixturesFilePath3: string,
+                    isFileExist1: boolean,
+                    isFileExist2: boolean,
+                    isFileExist3: boolean,
+                    fileContent1: string,
+                    fileContent2: string;
+
+                before(() => {
+                    outputFixturesFilePath1 = path.join(directoryPath, outputFileName1);
+                    outputFixturesFilePath2 = path.join(directoryPath, outputFileName2);
+                    outputFixturesFilePath3 = path.join(directoryPath, outputFileName3);
+
+                    JavaScriptObfuscatorCLI.obfuscate([
+                        'node',
+                        'javascript-obfuscator',
+                        directoryPath,
+                        '--dangerously-overwrite',
+                        'true',
+                        '--rename-globals',
+                        'true'
+                    ]);
+
+                    isFileExist1 = fs.existsSync(outputFixturesFilePath1);
+                    isFileExist2 = fs.existsSync(outputFixturesFilePath2);
+                    isFileExist3 = fs.existsSync(outputFixturesFilePath3);
+
+                    fileContent1 = fs.readFileSync(outputFixturesFilePath1, readFileEncoding);
+                    fileContent2 = fs.readFileSync(outputFixturesFilePath2, readFileEncoding);
+                });
+
+                it(`should overwrite file \`${outputFileName1}\` with obfuscated code in \`${fixturesDirName}\` directory`, () => {
+                    assert.equal(isFileExist1, true);
+                });
+
+                it(`should overwrite file \`${outputFileName2}\` with obfuscated code in \`${fixturesDirName}\` directory`, () => {
+                    assert.equal(isFileExist2, true);
+                });
+
+                it(`shouldn't create file \`${outputFileName3}\` in \`${fixturesDirName}\` directory`, () => {
+                    assert.equal(isFileExist3, false);
+                });
+
+                it(`match #1: should overwrite file with obfuscated code with prefixed identifier`, () => {
+                    assert.match(fileContent1, regExp1);
+                });
+
+                it(`match #2: should overwrite file with obfuscated code with prefixed identifier`, () => {
+                    assert.match(fileContent2, regExp2);
+                });
+
+                after(() => {
+                    // instead recreate foo and bar files exactly as they were instead of deleting them
+                    fs.writeFileSync(outputFixturesFilePath1, 'var foo = 1;');
+                    fs.writeFileSync(outputFixturesFilePath2, 'var bar = 2;');
+                });
+            });
         });
 
         describe('`--sourceMap` option is set', () => {