dialoguer

Dialoguer is a Rust crate that provides a collection of interactive prompts for building terminal-based user interfaces. It aims to simplify collecting input in command-line applications by offering a range of prebuilt prompts and theming options, reducing the need to manage raw terminal input.

The library supports several prompt types, including Input for free-text entry, Confirm for boolean decisions, Select for choosing a single item from a list, MultiSelect for choosing multiple items, and Password for hidden input. Some prompts also support features such as default values, validation, and fuzzy search to ease navigation through long lists.

The API uses a builder-style pattern. Developers configure a prompt with methods to set the prompt text, default, and other options, then invoke an interact or interact_opt method to retrieve the result. The prompts return standard Rust types (such as String, bool, or usize) or None if the user cancels or the prompt fails.

Theming is supported via theme types, with ColorfulTheme commonly provided as the default. Custom themes allow adjustment of colors, markers, and layout to match an application's style. Dialoguer is designed to be cross-platform and integrates with common Rust CLI workflows, making it a practical choice for adding user prompts to a CLI without implementing terminal handling from scratch.