lazy-install

Install lazy dependencies when your node.js app starts. Modules are cached and shared between projects for blazing fast installs.

Install from npm

$ npm install --save lazy-install

Define lazy dependencies

// package.json
{
  "name": "myProject",
  "lazyDependencies": {
    "server": {
      "express": "4.0.0"
    },
    "test": {
      "mocha": "1.18.2"
    }
  }
}

Include in your project

var lazy = require("lazy-install");

Basic usage

Install all lazy dependencies in package.json

function callback (err, installed) {
  if (err) throw new Error(err);
  console.log(installed.count, installed.time);
}
lazy.install(callback);

Using groups

Install app dependencies, and optionally test dependencies

var groups = ['server'];
if (process.env.ENV !== 'production') groups.push('test');
lazy.install({
  'groups': groups
}, callback);

Fine-grained control

Make runtime decisions on what to install

lazy.install({
  'before': function (name, version) {
    if (name[0] !== 'ex') return false;
    return true;
  }
}, callback);

Use alternate dependencies

Load another json file and install modules relative to its parent folder. Could be useful for when including components as git submodules.

lazy.install({
  'path': process.cwd() + '/components/foo/package.json'
}, callback);

Changelog

0.3.0 Stores cached module in a shared folder, in $HOME/.lazy-install-cache, for even faster installs when using lazy-install in multiple projects #4
0.2.3 Fixed issue with the cache path
0.2.2 Fixed critical bug in lib/copy
0.2.1 Improved result logging, separating result.count and result.cached
0.2.0 Cache modules in /cache for blazing fast re-installs
0.1.0 Initial release

Made by Adam Renklint, Berlin 2014. MIT licensed.

adamrenklint/lazy-install