Introduction

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Visit any DevOps engineer and you will find their screens filled with terminals executing Command-Line Interface (CLI) applications.

As a DevOps engineer, we don’t want to only use applications that others have made for us; we want to be able to write our own CLI applications. These applications might communicate to various systems via REST or gRPC. Or we might want to execute various applications and run their output through custom processing. An application might even set up a development environment and kick off a test cycle for a new release.

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