Bulk Create Components in a Project

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.project.AssigneeTypes

def projCompManager = ComponentAccessor.projectComponentManager
def projManager = ComponentAccessor.projectManager

def components = ['User Interface (UI)', 'Database', 'API', 'Security', 'Analytics', 'Messaging', 'Infrastructure', 'Company Website / Blog', 'YouTube Videos', 'Web Advertising', 'Partner Websites', 'Networking', 'Systems', 'Software', 'Hardware']
def username = 'admin'
def projKey = 'KP'

def projectId = projManager.getProjectByCurrentKey(projKey).id
def leadUser = ComponentAccessor.userManager.getUserByName(username).key

components.each { component ->
    projCompManager.create( component, null, leadUser, AssigneeTypes.PROJECT_DEFAULT, projectId)
}