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 [--force/-f]"

function init (args, cb) {
  var dir = process.cwd()
  log.pause()
  npm.spinner.stop()
  var initFile = npm.config.get("init-module")
  if (!initJson.yes(npm.config)) {
    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, function (er, data) {
    log.resume()
    log.silly("package data", data)
    if (er && er.message === "canceled") {
      log.warn("init", "canceled")
      return cb(null, data)
    }
    log.info("init", "written successfully")
    cb(er, data)
  })
}