What is an Event-Driven Architecture and Why do I need One?

Send emails from your terminal.

Easy to use OpenID Connect client and server library written for Go and certified by the OpenID Foundation

A major Go language change proposal was published earlier this week: add range over int, range over func, and there's a good chance this change will make it into a future Go release. In this post I will discuss the motivation for this proposal, how it's going to work, and provide some examples of how Go code using it would look.

Update 2023.07.24: the proposal keeps evolving, and some details will likely change. This post still serves as a good introduction to the topic, and I will update it (or add another post) when the proposal settles to the final syntax and semantics.

Govulncheck is a low-noise tool that helps you find and fix vulnerable dependencies in your Go projects. It does this by scanning your project’s dependencies for known vulnerabilities and then identifying any direct or indirect calls to those vulnerabilities in your code.

In this tutorial, you will learn how to use govulncheck to scan a simple program for vulnerabilities. You will also learn how to prioritize and evaluate vulnerabilities so that you can focus on fixing the most important ones first.

The Go memory model specifies the conditions under which reads of a variable in one goroutine can be guaranteed to observe values produced by writes to the same variable in a different goroutine.

Go programmers have the good fortune of excellent testing and benchmarking tooling built into the standard library - in the testing package. However, benchmarking is hard. This isn't Go specific; it's just one of those things experienced developers learn over time.

This post lists some common benchmarking pitfalls Go programmers run into. It assumes basic familiarity with writing Go benchmarks; consult the testing package documentation if needed. While these pitfalls are presented in Go, they exist in any programming language or environment, so the lessons learned here are widely applicable.

In this tutorial, I will show how you can use Cobra to build CLI applications in Go and highlight some of its key features and benefits. I will do this by walking you through the process of building a CLI that encrypts and decrypts text based on a specified cipher.

ff stands for flags-first, and provides an opinionated way to populate a flag.FlagSet with configuration data from the environment. By default, it parses only from the command line, but you can enable parsing from environment variables (lower priority) and/or a configuration file (lowest priority).

Building a commandline application in the style of kubectl or docker? Consider package ffcli, a natural companion to, and extension of, package ff.

Go is generally considered a ‘simple’ language, but it has more edge cases and tricks than most might expect.

grpcurl is a command-line tool that lets you interact with gRPC servers. It's basically curl for gRPC servers.

The new log/slog package in Go 1.21 brings structured logging to the standard library. Structured logs use key-value pairs so they can be parsed, filtered, searched, and analyzed quickly and reliably. For servers, logging is an important way for developers to observe the detailed behavior of the system, and often the first place they go to debug it. Logs therefore tend to be voluminous, and the ability to search and filter them quickly is essential.

Learn how to use Go's singleflight and errgroup packages, and other important design patterns for concurrency, with real-world examples.

Alex shares his insights from building half a dozen popular Go CLIs. Which can you apply to your projects?

Is your project's CLI growing with you? I'll cover some of the lessons learned writing the OpenFaaS, actuated, actions-usage, arkade and k3sup CLIs, going as far back as 2016. I hope you'll find some ideas or inspiration for your own projects - either to start them off, or to improve them as you go along.