Building Command Line Tools with Go

The text discusses building command line tools with Go, a popular programming language. It mentions that spf13's Cobra is the most commonly used package for this purpose in the ecosystem. However, it also suggests using the standard library when only rudimentary flag parsing is needed. For more complex scenarios, cdr/cli is recommended as a minimalistic and easy-to-use option. The text then provides an example of building a port scanner in Go using the cdr/cli package. It covers project structure, defining root commands, adding subcommands, implementing a port scanner, and testing the command line tool.