Swiftline consists the following:
You can install Swiftline using cocoapods,
use_frameworks! pod 'Swiftline'
If you want to use swiftline in a script you can use Rome cocoapod plugin. This plugin builds the framework from the pod file and place them in a Rome directory.
platform :osx, '10.10' plugin 'cocoapods-rome' pod 'Swiftline'
A list of examples can be found on github