completion.js

module.exports = completion

completion.usage = "Not intended to be used directly.\n"
                 + "See the npm-completion.sh script in the npm "
                 + "source directory"

var npm = require("../npm")
  , getCompletions = require("./utils/completion/get-completions")
  , containsSingleMatch = require("./utils/completion/contains-single-match")
  , output = require("./utils/output")
  , index = npm.config.get("comp-cword") || process.env.COMP_CWORD
  , log = require("./utils/log")

function completion (args, cb_) {
  var cmd = args[1] || ""
    , complFullList = getCompletions(cmd, npm.fullList, true)
  Object.keys(process.env).filter(function (e) {
    return e.toUpperCase().match(/^COMP/)
  }).forEach(function (e) {
    log.warn(e+"="+process.env[e], "completion env")
  })

  function cb (er, list) {
    if (er) return cb_(er)
    outputCompletions(list, cb_)
  }

  if (index > 1 || (complFullList.indexOf(cmd) !== -1 &&
                    containsSingleMatch(cmd, complFullList))) {
    var subargs = args.slice(2)
    // TODO: bundle
    npm.commands[npm.deref(cmd)].completion(subargs, index, cb)
  } else cb(null, complFullList)
}

function outputCompletions (list, cb_) {
  var outfd = npm.config.get("outfd")
  function cb () { cb_(list.length ? null : "no match found", list) }
  log.warn(list, "completion output")
  output.write(outfd, list, false, cb)
}