import com.atlassian.sal.api.component.ComponentLocator
import com.atlassian.stash.project.Project
import com.atlassian.stash.project.ProjectService
import com.atlassian.stash.project.ProjectUpdateRequest
import com.atlassian.stash.user.Permission
import com.atlassian.stash.user.PermissionAdminService
import com.atlassian.stash.user.SetPermissionRequest
import com.atlassian.stash.user.UserService
import com.atlassian.stash.util.Page
import com.atlassian.stash.util.PageProvider
import com.atlassian.stash.util.PageRequest
import com.atlassian.stash.util.PagedIterable

def projectService = ComponentLocator.getComponent(ProjectService)
def permissionAdminService = ComponentLocator.getComponent(PermissionAdminService)
def userService = ComponentLocator.getComponent(UserService)

new PagedIterable<Project>(new PageProvider<Project>() {
    @Override
    Page<Project> get(PageRequest pageRequest) {
        projectService.findAll(pageRequest) as Page<Project>
    }
}, 10).each { project ->
    log.debug("Update project ${project.key}")
    def setPermissionRequest = new SetPermissionRequest.Builder()
       .projectPermission(Permission.PROJECT_WRITE, project) 
       .group("developers") 
       .build()

    permissionAdminService.setPermission(setPermissionRequest)
}