alerts.js

var follow = require("follow")
var seen = {}

follow({ db: "http://isaacs.ic.ht/registry"
       , since: 20267
       , include_docs: true }, function (er, update) {
  if (er) throw er

  var doc = update.doc

  // no more than once per second per package
  if (seen[doc._id]) return
  seen[doc._id] = setTimeout(function () {
    delete seen[doc._id]
  }, 1000)

  var ver
  if (doc._deleted) {
    ver = ""
    doc.description = "REMOVED"
    doc.maintainers = []
    doc.homepage = " "
  } else ver = doc["dist-tags"].latest

  doc.homepage = getHomepage(doc)

  console.log(doc._id + " " + ver + " " +
              doc.maintainers.map(function (m) { return m.name }).join(" ") +
              " " + doc.homepage +
              "\n  " + (doc.description || ""))

})

function getHomepage (d) {
  var homepage = d.homepage
    , repo = d.repository || d.repositories
  if (homepage) return homepage
  if (repo) {
    if (Array.isArray(repo)) repo = repo.shift()
    if (repo.url) repo = repo.url
    if (repo) {
      return repo.replace(/^git(@|:\/\/)/, 'http://')
                 .replace(/\.git$/, '')
    }
  }
  return "http://search.npmjs.org/#/" + d.name
}