jscpd is a tool for detect copy/past "design pattern" in programming source code.

npm install jscpd -g

jscpd --path my_project/ --languages js,coffee #scan for js and coffee files for duplicates

jscpd -f **/*.js -e **/node_modules/**

jscpd --files **/*.js --exclude **/*.min.js --output report.xml

or

If you have file .cpd.yaml in your directory

#.cpd.yaml
path:
  - fixtures/
languages:
  - javascript
  - coffeescript
  - php
  - python
  - less
  - ruby
  - java
  - "c++src" # c++ source
  - csrc     # c source
  - csharp   # c# source
exclude:
  - "**/*.min.js"
  - "**/*.mm.js"

and run jscpd command, you will check code for duplicates according config from .cpd.yaml

or

# coffeescript
jscpd = require('jscpd')
result = jscpd::run
    path: 'my/project/folder'
    files: '**/*.js'
    exclude: ['**/*.min.js', '**/node_modules/**']

Please see the minimatch documentation for more details.

• -l, --min-lines | [NUMBER] | 5 | min size of duplication in code lines
• -t, --min-tokens | [NUMBER] | 70 | mim size of duplication in code tokens
• -f, --files | [STRING] | * | glob pattern for find code
• -e, --exclude | [STRING] | - | directory to ignore
• -g, --languages | [STRING] | All supported | list of languages which scan for duplicates, separated with coma
• -o, --output | [PATH] | - | path to report xml file

• --verbose    |           | -             | show full info about copies
  

• -p, --path | [PATH] | Current dir | path to code
• -d, --debug | | - | show debug information (options list and selected files)
• -v, --version | | - | Display the current version
• -h, --help | | - | Display help and usage details

  npm test

Project changelog

Project plans

The MIT License