node/deps/npm/lib/init.js

// initialize a package.json file

module.exports = init

var log = require("npmlog")
  , npm = require("./npm.js")
  , initJson = require("init-package-json")

init.usage = "npm init"

function init (args, cb) {
  var dir = process.cwd()
  log.pause()
  var initFile = npm.config.get('init-module')

  console.log(
    ["This utility will walk you through creating a package.json file."
    ,"It only covers the most common items, and tries to guess sane defaults."
    ,""
    ,"See `npm help json` for definitive documentation on these fields"
    ,"and exactly what they do."
    ,""
    ,"Use `npm install <pkg> --save` afterwards to install a package and"
    ,"save it as a dependency in the package.json file."
    ,""
    ,"Press ^C at any time to quit."
    ].join("\n"))

  initJson(dir, initFile, npm.config.get(), function (er, data) {
    log.resume()
    log.silly('package data', data)
    log.info('init', 'written successfully')
    cb(er, data)
  })
}