require 'net/ldap'

email = ARGV[0]

ldap = Net::LDAP.new(host: 'directory.vt.edu')
ldap.bind
treebase = 'ou=People,dc=vt,dc=edu'
ldap_attributes = {display_name: :displayname, department: :department}

filter = Net::LDAP::Filter.eq('mail', email)
results = ldap.search(base: treebase, filter: filter)
puts results[0].uid