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Building Modern CLI Applications in Go

You're reading from   Building Modern CLI Applications in Go Develop next-level CLIs to improve user experience, increase platform usage, and maximize production

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Product type Paperback
Published in Mar 2023
Publisher Packt
ISBN-13 9781804611654
Length 406 pages
Edition 1st Edition
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Author (1):
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Marian Montagnino Marian Montagnino
Author Profile Icon Marian Montagnino
Marian Montagnino
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Toc

Table of Contents (21) Chapters Close

Preface 1. Part 1: Getting Started with a Solid Foundation
2. Chapter 1: Understanding CLI Standards FREE CHAPTER 3. Chapter 2: Structuring Go Code for CLI Applications 4. Chapter 3: Building an Audio Metadata CLI 5. Chapter 4: Popular Frameworks for Building CLIs 6. Part 2: The Ins and Outs of a CLI
7. Chapter 5: Defining the Command-Line Process 8. Chapter 6: Calling External Processes and Handling Errors and Timeouts 9. Chapter 7: Developing for Different Platforms 10. Part 3: Interactivity and Empathic Driven Design
11. Chapter 8: Building for Humans versus Machines 12. Chapter 9: The Empathic Side of Development 13. Chapter 10: Interactivity with Prompts and Terminal Dashboards 14. Part 4: Building and Distributing for Different Platforms
15. Chapter 11: Custom Builds and Testing CLI Commands 16. Chapter 12: Cross-Compilation across Different Platforms 17. Chapter 13: Using Containers for Distribution 18. Chapter 14: Publishing Your Go Binary as a Homebrew Formula with GoReleaser 19. Index 20. Other Books You May Enjoy

Testing a CLI

Now that we have successfully built the CLI application, we can do some testing to make sure that it’s working. We can test out the commands we’ve created and then write out proper tests to make sure any future changes don’t break the current functionality.

Manual testing

To upload an audio file, we’ll run the following command:

./audiofile-cli upload -filename audio/beatdoctor.mp3

The result is as expected:

Uploading audio/beatdoctor.mp3 ...
Audiofile ID:  8a6a8942-161e-4b10-bf59-9d21785c9bd9

Now that we have the audiofile ID, we can immediately get the metadata, which will change as the metadata updates after each extraction process. The command for requesting metadata is as follows:

./audiofile-cli get -id=8a6a8942-161e-4b10-bf59-
9d21785c9bd9

The result is the populated Audio struct in JSON format:

{
    "Id": "8a6a8942-161e-4b10-bf59-9d21785c9bd9",
  ...
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