Jscpd Public Copy/paste detector for programming source code

4 months ago 3

Copy/paste detector for programming source code, supports 150+ formats.

Copy/paste is a common technical debt on a lot of projects. The jscpd gives the ability to find duplicated blocks implemented on more than 150 programming languages and digital formats of documents. The jscpd tool implements Rabin-Karp algorithm for searching duplications.

$ npx jscpd /path/to/source

$ jscpd --pattern "src/**/*.js"

More information about cli here.

For integration copy/paste detection to your application you can use programming API:

jscpd Promise API

import {IClone} from '@jscpd/core'; import {jscpd} from 'jscpd'; const clones: Promise<IClone[]> = jscpd(process.argv);

jscpd async/await API

import {IClone} from '@jscpd/core'; import {jscpd} from 'jscpd'; (async () => { const clones: IClone[] = await jscpd(['', '', __dirname + '/../fixtures', '-m', 'weak', '--silent']); console.log(clones); })();

detectClones API

import {detectClones} from "jscpd"; (async () => { const clones = await detectClones({ path: [ __dirname + '/../fixtures' ], silent: true }); console.log(clones); })()

detectClones with persist store

import {detectClones} from "jscpd"; import {IMapFrame, MemoryStore} from "@jscpd/core"; (async () => { const store = new MemoryStore<IMapFrame>(); await detectClones({ path: [ __dirname + '/../fixtures' ], }, store); await detectClones({ path: [ __dirname + '/../fixtures' ], silent: true }, store); })()

In case of deep customisation of detection process you can build your own tool with @jscpd/core, @jscpd/finder and @jscpd/tokenizer.

Fork the repo kucherenko/jscpd
Clone forked version (git clone https://github.com/{your-id}/jscpd)
Install dependencies (pnpm install)
Run the project in dev mode: pnpm dev (watch changes and rebuild the packages)
Add your changes
Add tests and check it with pnpm test
Build your project pnpm build
Create PR

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