Building Command-Line Tools

Parse command-line flags and arguments using the `flag` package

Build robust CLI applications with subcommands using a library like Cobra

Perform file system operations like reading from and writing to files

Execute and manage external commands, capturing their input and output streams

Parse and generate JSON and YAML for application configuration

Interact with the OS via environment variables and the `path/filepath` package

Produce formatted and column-aligned terminal output using `fmt` and `text/tabwriter`

Create installable, cross-compiled binaries for different operating systems