README.md

find-duplicate-dependencies

Finds duplicate dependencies in your node_modules. Useful when use npm as a package manager for front-end.

Install

for CLI usage

> npm install -g find-duplicate-dependencies

for API usage

> npm install find-duplicate-dependencies

Usage

CLI

> find-duplicate-dependencies

This command exits with 1 if there are some duplicates and with 0 if there are not.

API

var findDuplicateDependencies = require('find-duplicate-dependencies');

findDuplicateDependencies().then(
    function(duplicates) {
    
      /*
      duplicates has the following format:
      
      {
        "tar": [
          {
            name: 'tar',
            version: '1.0.3',
            from: 'tar@>=1.0.0 <2.0.0',
            path: 'test/npm/node-gyp'
          },
          {
            name: 'tar',
            version: '2.1.1',
            from: 'tar@>=2.1.1 <2.2.0',
            path: 'test/npm'
          }
        ],
        "mime-types": [
          {
            name: 'mime-types',
            version: '2.1.2',
            from: 'mime-types@>=2.1.1 <3.0.0',
            path: 'test/npm/request/form-data'
          },
          {
            name: 'mime-types',
            version: '2.0.14',
            from: 'mime-types@>=2.0.1 <2.1.0',
            path: 'test/npm/request'
          } 
        ]
      }
      */

      if (Object.keys(duplicates).length) {

        printFailMessage(duplicates);
        return process.exit(1);
      }

      printSuccessMessage();
    }
).catch(function(err) {

  console.error(err.stack);
  return process.exit(1);
});