module.exports = logout

var dezalgo = require("dezalgo")

var log = require("npmlog")

var npm = require("./npm.js")

var mapToRegistry = require("./utils/map-to-registry.js")

logout.usage = "npm logout [--registry] [--scope]"

function logout (args, cb) {

npm.spinner.start()

cb = dezalgo(cb)

mapToRegistry("/", npm.config, function (err, uri, auth, normalized) {

if (err) return cb(err)

if (auth.token) {

log.verbose("logout", "clearing session token for", normalized)

npm.registry.logout(normalized, { auth: auth }, function (err) {

if (err) return cb(err)

npm.config.clearCredentialsByURI(normalized)

npm.spinner.stop()

npm.config.save("user", cb)

})

}

else if (auth.username || auth.password) {

log.verbose("logout", "clearing user credentials for", normalized)

npm.config.clearCredentialsByURI(normalized)

npm.spinner.stop()

npm.config.save("user", cb)

}

else {

cb(new Error(

"Not logged in to", normalized + ",", "so can't log out."

))

}

})

}