Find users in group. Add all members of group to another group. Scriptrunner

[Raynard Rhodes]

I'm currently attempting to find all users in a group then add all of them to another group using scriptrunner. Below I am able to view the individuals in the initial group, but I am unable to add them to another. Below is currently what I have.

**edit** we are using crowd to manage our groups. These are not local groups.

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.bc.user.search.UserSearchService
import com.atlassian.crowd.embedded.api.User
import com.atlassian.jira.user.ApplicationUser

def groupManager = ComponentAccessor.getGroupManager()
def userManager = ComponentAccessor.getUserManager()
def usersInGroup = groupManager.getUsersInGroup("GRC-RefSeq")
log.warn(usersInGroup)
def systems = groupManager.getGroup("Systems")

for(people in usersInGroup){
//lost
}

[Raynard Rhodes · Accepted solution]

I've figured it out.

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.user.ApplicationUser
import com.atlassian.jira.user.util.UserManager
import com.atlassian.crowd.embedded.api.Group


def groupManager = ComponentAccessor.getGroupManager()
def userManager = ComponentAccessor.getUserManager()

def usersInGroup1 = groupManager.getUsersInGroup("THIS IS GROUP 1")
def usersInGroup2 = groupManager.getUsersInGroup("THIS IS GROUP 2")
log.warn(usersInGroup1)
log.warn(usersInGroup2)
def systems = groupManager.getGroup("ADD TO THIS GROUP")

Collection<ApplicationUser> Group1 = usersInGroup1
Collection<ApplicationUser> Group2 = usersInGroup2

for (ApplicationUser Users1 : Group1){
groupManager.addUserToGroup(Users1,systems)
}

for (ApplicationUser User2 : Group2){
groupManager.addUserToGroup(User2,systems)
}

[Dang Thi Thuy Tien]

Hey there!
With Group Master for Jira. You can quickly add, remove, or update members—all from one place with bulk users ;) with UI, no need script anymore :v 

Try it out and make group management smooth and simple!
https://marketplace.atlassian.com/apps/1236395/group-master-for-jira?hosting=datacenter&tab=overview

And another advanced group management capabilities:
    View group usage across Jira
    Edit group names for clarity
    Move or copy group members easily
    Replicate or migrate group usage
    Delete groups and clean up associated data