What Is Hiding on Your Disk? Go Cobra `scan` Command

Implementing our simple scan command with Cobra and Go is much easier than you might think! You can check out the first part right here: https://youtu.be/7q7cyK4-jmM 📝 Description Add your first proper subcommand to a Go CLI built with Cobra: scan. In this second part of the mini-series, we build a command that walks a directory and displays file sizes, with an optional flag to mark large files. That makes it easy to find what's eating your disk space. Here's what you will learn: • Create a Cobra subcommand with `Use`, `Short`, `Long`, and aliases, and register it with `AddCommand` inside init. • Define local flags such as `--path` and `--mark` with shorthands, and see how they differ from persistent flags like `--verbose`. • Validate input up front and return wrapped errors with `%w` using `RunE`. • Walk a directory recursively with `filepath.WalkDir`, handle errors without stopping the scan, and convert bytes to MB without integer division bugs. ⏳ Timestamps: 00:00 - Introduction 01:14 - scan implementation 18:53 - Testing 21:30 - Outro 🔗 Links: cobra: https://github.com/spf13/cobra 👋 Hey there! If you are new to this channel: Hey 👋 my name is Flo and I am a professional software engineer with a passion for coding in Golang, TypeScript, JavaScript, and Rust. This channel is where I share that passion and dive into the exciting world of software engineering. 📨 Support and Connect! Become a member. https://www.youtube.com/@FloWoelki/membership Discord: https://discord.gg/TnA7drJ X / Twitter: https://x.com/FlorianWoelki LinkedIn: https://www.linkedin.com/in/florian-woelki/ GitHub: https://github.com/FlorianWoelki 📝 Copyright Notice The original Go Gopher was designed by Renée French (Source: https://go.dev/blog/gopher License details: https://creativecommons.org/licenses/by/4.0/). The gopher appearing in this video and thumbnail has been modified from the original design and is based on an illustration from Maria Letta's free-gophers-pack (Source: https://github.com/MariaLetta/free-gophers-pack License: CC0 1.0 Public Domain https://creativecommons.org/publicdomain/zero/1.0/). #go #cobra #cli #scan