Wesley Beary, an expert in CLI and API development at Anchor, shares insights from his journey in crafting user-friendly command-line interfaces. He discusses the balance between simplicity and advanced functionalities, emphasizing interactive modes for novices. Wesley explores the transition to Go for performance, the challenges of testing CLIs, and how self-documenting features can improve user experience. He also compares IDEs like IntelliJ and VS Code, shedding light on productivity tools that aid in software development.
The transition from Ruby to Go for CLI development highlights the significance of understanding different design philosophies and syntax.
Effective testing in CLI development combines mocking with real API integration, enabling rapid iteration while ensuring command accuracy and coverage.
A user-centric design approach prioritizes intuitive interactions, employing features like automatic error handling and context-sensitive prompts to enhance user experience.
Deep dives
Understanding Fly for Developers
Fly is positioned as an adaptable platform for developers, catering to different experience levels. Its appeal includes the ability to quickly launch applications, which resonates with newer developers familiar with platforms like Vercel. Unlike Heroku, where frustrating limitations on feature additions often arise, Fly allows for deeper integration of functionalities such as full-text search and machine learning models. This flexibility is accentuated by the platform's emphasis on running applications close to users geographically, enhancing performance and user experience.
The Journey of Building a CLI
The transition into building a command-line interface (CLI) is marked by the adoption of Go as the programming language, despite previous familiarity with Ruby. This change demands not only a grasp of new syntax and conventions but also an understanding of how Go's design philosophy, which values simplicity and explicitness, contrasts with Ruby's more flexible approach. The experience also illustrates the importance of iteration and testing in development, aiming for an intuitive user experience that avoids complicating the CLI through unnecessary barriers. Challenges include effectively integrating existing libraries and finding satisfactory testing frameworks that cater to the unique needs of the CLI.
Testing Strategy for CLI Development
Effective testing within the CLI development process involves a combination of mocking and integration with actual API services. The developers utilize tools like Prism to simulate API responses during tests, allowing them to iterate rapidly while assuring command accuracy. This approach reduces the risk associated with real network calls, enabling the team to maintain focus on refining the user experience. Furthermore, emphasis on test coverage helps verify command outputs reliably and facilitate smoother future iterations.
User Experience Focus in CLI Design
The design philosophy for the CLI prioritizes user interaction and guidance, striving to streamline the command execution process. Features such as automatic error handling and context-sensitive prompts help to facilitate a more intuitive user experience. Innovations like helping users select organizations when needed underscore a commitment to minimizing confusion and encouraging exploration. This user-centric approach aims to engage users effectively and educate them on the CLI's functionalities, turning potential frustrations into seamless interactions.
The Debate Over Positional Arguments
In the ongoing discussion about CLI design, the use of positional arguments within multi-command CLIs emerges as a contentious subject. The argument is made that while positional arguments can lead to ambiguity, especially when commands may have similar structures, using flags for parameters improves clarity and maintainability. The inherent risk in positional arguments lies in their variability across different commands, which undermines the user's ability to transfer knowledge from one command to another. Encouraging explicit input through flag usage aligns with the broader philosophy of empowering users to understand and control their command executions.
With the number of libraries available to Go developers these days, you’d think building a CLI app was now a trivial matter. But like many things in software development, it depends. In this episode, we explore the challenges that arose during one team’s journey towards a production-ready CLI.
Changelog++ members save 9 minutes on this episode because they made the ads disappear. Join today!
Sponsors:
Fly.io – The home of Changelog.com — Deploy your apps close to your users — global Anycast load-balancing, zero-configuration private networking, hardware isolation, and instant WireGuard VPN connections. Push-button deployments that scale to thousands of instances. Check out the speedrun to get started in minutes.
JetBrains – Sign up for the free “Mastering Go with GoLand” course and receive a complimentary 1-year GoLand subscription at bytesizego.com/goland
Retool – The low-code platform for developers to build internal tools — Some of the best teams out there trust Retool…Brex, Coinbase, Plaid, Doordash, LegalGenius, Amazon, Allbirds, Peloton, and so many more – the developers at these teams trust Retool as the platform to build their internal tools. Try it free at retool.com/changelog