Powerful Command-Line Applications in Go

Wrapping Up

In this chapter, you designed and built a flexible tool that uses other tools and commands to execute specialized tasks in an automated way. You executed external commands, managed their error conditions, captured their output, and handled long-running processes appropriately. You tested your application using two different strategies: using a test helper to build a temporary local infrastructure, and mocking the external command. Finally, you ensured your application handles the operating system signal in a clean way to correctly communicate status to downstream applications and to prevent data loss.

In the next chapter, you’ll use the Cobra CLI framework to help you develop a command-line network port scanner by generating the boilerplate ...