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Building Modern CLI Applications in Go

Building Modern CLI Applications in Go

By : Marian Montagnino
4.7 (14)
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Building Modern CLI Applications in Go

Building Modern CLI Applications in Go

4.7 (14)
By: Marian Montagnino

Overview of this book

Although graphical user interfaces (GUIs) are intuitive and user-friendly, nothing beats a command-line interface (CLI) when it comes to productivity. Many organizations settle for a GUI without searching for alternatives that offer better accessibility and functionality. If this describes your organization, then pick up this book and get them to rethink that decision. Building Modern CLI Applications in Go will help you achieve an interface that rivals a GUI in elegance yet surpasses it in high-performance execution. Through its practical, step-by-step approach, you’ll learn everything you need to harness the power and simplicity of the Go language to build CLI applications that revolutionize the way you work. After a primer on CLI standards and Go, you’ll be launched into tool design and proper framework use for true development proficiency. The book then moves on to all things CLI, helping you master everything from arguments and flags to errors and API calls. Later, you’ll dive into the nuances of empathic development so that you can ensure the best UX possible, before you finish up with build tags, cross-compilation, and container-based distribution. By the end of this UX book, you’ll be fully equipped to take the performance and flexibility of your organization’s applications to the next level.
Table of Contents (21 chapters)
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1
Part 1: Getting Started with a Solid Foundation
6
Part 2: The Ins and Outs of a CLI
10
Part 3: Interactivity and Empathic Driven Design
14
Part 4: Building and Distributing for Different Platforms

Calling External Processes and Handling Errors and Timeouts

Many command-line applications interact with other external commands or API services. This chapter will guide you through how to call these external processes and how to handle timeouts and other errors when they occur. The chapter will start with a deep dive into the os/exec package, which contains everything you need to create commands that call external processes that give you multiple options for creating and running commands. You’ll learn how to retrieve data from the standard output and standard error pipes, as well as creating additional file descriptors for similar usage.

Another external process involves calling external API service endpoints. The net/http package is discussed and is where we start defining the client, then create the requests that it executes. We will discuss the different ways requests can be both created and executed.

Timeouts and other errors can occur when calling either type of...

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Building Modern CLI Applications in Go
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