nlf

Find licenses for a node application and its node_module dependencies

Node License Finder (nlf)

nlf is a utility for attempting to identify the licenses of modules in a node.js project.

It looks for license information in package.json, readme and license files in the project. Please note, in many cases the utility is looking for standard strings in these files, such as MIT, BSD, Apache, GPL etc - this is not error free, so if you have any concerns at all about the accuracy of the results, you will need to perform a detailed manual review of the project and its dependencies, reading all terms of any included or referenced license.

nlf can be used programmatically, or from the command line.

  • directory (String) - where to look
  • production (Boolean) (Default:false) - only traverse dependencies, no dev-dependencies
  • depth (Number) (Default: Infinity) - how deep to traverse packages where 0 is the current package.json only

To install:

$ npm install -g nlf
 

To use:

cd my-module
$ nlf

Example output:

archy@0.0.2 [license(s): MIT/X11]
└── package.json:  MIT/X11

commander@0.6.1 [license(s): MIT] └── readme files: MIT

glob@3.2.3 [license(s): BSD] ├── package.json: BSD └── license files: BSD

json-stringify-safe@5.0.0 [license(s): BSD] ├── package.json: BSD └── license files: BSD

read-installed@0.2.2 [license(s): BSD] └── license files: BSD

should@1.2.2 [license(s): MIT] └── readme files: MIT

LICENSES: BSD, MIT, MIT/X11

For output in CSV format use the -c (or --csv) switch:

cd my-module
$ nlf -c

To exclude development dependencies and only analyze dependencies for production:

cd my-module
$ nlf -d
var nlf = require('nlf');
 
nlf.find({ directory: '/User/me/my-project' }, function (errdata) {
    // do something with the response object. 
    console.log(JSON.stringify(data));
});
 
// to only include production dependencies 
nlf.find({
    directory: '/User/me/my-project',
    production: true
}, function (errdata) {
    // do something with the response object. 
    console.log(JSON.stringify(data));
});
 

The data returned from find() is an array of modules, each of which is represented by an object as the following example:

{
  "id": "example@0.2.9",
  "name": "example",
  "version": "0.2.9",
  "repository": "http:\/\/github.com\/iandotkelly\/example",
  "directory": "\/Users\/ian\/example",
  "licenseSources": {
    "package": {
      "sources": [
        {
          "license": "MIT",
          "url": "http://opensource.org/MIT"
        }
      ]
    },
    "license": {
      "sources": [
        {
          "filePath": "\/Users\/ian\/Personal\/example\/LICENSE",
          "text": "the text of the license file",
          "name": function() { // function that returns the name of the license if known }
        }
      ]
    },
    "readme": {
      "sources": [
        {
          "filePath": "\/Users\/ian\/Personal\/example\/readme.md",
          "text": "text of the readme"
          "name": function() { // function that returns the name of the license if known }
        }
      ]
    }
  }
}

Each

To run the unit tests, install development dependencies and run tests with 'gulp'. Requires gulp.js to be installed globally.

# only need to install gulp if you have not done so already 
$ npm install -g gulp
cd nlf
$ npm install
$ gulp

If you contribute to the project, tests are written in mocha, using should.js or the node.js assert module.

The MIT License (MIT)

Copyright (c) 2013-2015 Ian Kelly

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.