yapm/lib/cache/maybe-github.js

package manager for io.js (npm fork)

var url = require("url")
  , npm = require("../../")
  , assert = require("assert")
  , log = require("npmlog")
  , lookup = require("gh-lookup")
  , addRemoteGit = require("./add-remote-git.js")
  , addRemoteTarball = require("./add-remote-tarball.js")

module.exports = function maybeGithub (p, cb) {
  assert(typeof p === "string", "must pass package name")
  assert(typeof cb === "function", "must pass callback")
  if (~p.indexOf('@')) {
    // github semver support, i.e. "npm install visionmedia/express@3"
    var key = p.split('@')[0]
    var val = p.split('@')[1]

    var token = npm.config.get('github-token')

    lookup({
      token: token,
      version: val,
      repo: key
    }, function (err, release) {
      if (err) return cb(err)
      if (!release) return cb(new Error('failed to find release of ' + key + '@' + val))
      var url = token
        ? release.tarball_url + '?access_token=' + token
        : release.tarball_url

      addRemoteTarball(url, {name: null}, null, null, cb)
    })

    return
  }

  // preserve old github behaviour if it has no semver attached
  // maybe fetch tarball here instead of git clone?
  var u = "git://github.com/" + p
  log.info("maybeGithub", "Attempting %s from %s", p, u)

  return addRemoteGit(u, true, function (er, data) {
    if (er) {
      var upriv = "git+ssh://git@github.com:" + p
      log.info("maybeGithub", "Attempting %s from %s", p, upriv)

      return addRemoteGit(upriv, false, function (er, data) {
        if (er) return cb(er)

        success(upriv, data)
      })
    }

    success(u, data)
  })

  function success (u, data) {
    data._from = u
    data._fromGithub = true
    return cb(null, data)
  }
}