gilt

Rich terminal output for Rust — a port of Python's rich, plus Rust-native extras: a compile-time text! macro, a WASM-safe build, lock-free async Live, inline images, asciinema export, and 7 widget derives.

gilt hero

What gilt is — and is not

gilt emits scrolling, styled ANSI output (styles, tables, trees, syntax, markdown, progress bars, live displays) that drops straight into any CLI. You print renderables and they scroll by just like normal terminal output.

gilt is not a full-screen TUI framework — it does not own the alternate screen, run an event loop, or need crossterm for basic output. Reach for ratatui when you need a full-screen interactive app; reach for gilt for CLI output, log styling, CI reports, build dashboards, and streaming output.

Quick start

[dependencies]
gilt = "2.0"

use gilt::console::Console;

fn main() {
    let mut console = Console::default();
    console.print_text("Hello, [bold magenta]gilt[/bold magenta]!");
}

Upgrading? See MIGRATION_v2.md for the 1.x → 2.0 changes (and MIGRATION_v1.md for 0.13 → 1.0).

Visual gallery

Every image below is produced by gilt's own SVG export (cargo run --example gen_readme_demos --all-features) and committed, so it renders on GitHub and docs.rs without a server.

Styles — markup, named + true colour, backgrounds, hyperlinks:

gilt styles demo

Table — Unicode box-drawing with styled headers and inline markup:

gilt table demo

Tree — hierarchies with configurable guide characters:

gilt tree demo

Markdown — headings, lists, inline + fenced code:

gilt markdown demo

Syntax — 150+ languages with line numbers:

gilt syntax demo

Progress — multi-bar with description, bar, percent, and ETA:

gilt progress demo

Rust-native extras — gradient text and sparklines:

gilt extras demo

gilt-cli — rich output without Rust

Install the binary to use gilt from shell scripts, Makefiles, and CI:

cargo install gilt-cli

gilt print '[bold]hello[/] from gilt'
gilt table < data.csv
echo '# Title' | gilt markdown
cat src/main.rs | gilt syntax --lang rust
gilt rule 'Deploy complete'

Full subcommand reference: crates/gilt-cli/.

Features

Core widgets — Text · Table · Panel · Tree · Columns · Layout · Padding · Align · Group. In 2.0 every container holds any Renderable, so they nest freely (a Panel of a Table, a Tree label that is a Panel, a table cell holding a Panel).
Terminal features — Syntax (150+ languages) · Markdown · Json · Progress (ETA, speed, spinner) · Live (lock-free in-place updates) · Status.
Rust-native extras — Gradient · Sparkline · Canvas (Braille) · Diff (unified + side-by-side) · Figlet · CsvTable · Stylize ("hi".bold().red()) · iterator .progress() · Inspect (any Debug) · environment detection · WCAG 2.1 contrast · extended underlines · bidirectional anstyle interop.
Derive macros (feature derive) — Table, Panel, Tree, Columns, Rule, Inspect, Renderable, plus the compile-time text! macro that validates markup at compile time. See crates/gilt-derive/.
Optional integrations — miette · eyre · tracing · anstyle.

Why gilt?

	gilt	rich (Python)	ratatui	Spectre.Console
Language	Rust	Python	Rust	C#
Inline scrolling output	yes	yes	no	yes
Full-screen TUI	no	no	yes	no
Compile-time `text!` macro	yes	no	no	no
WASM-safe	yes	no	no	no
Derive macros	yes	no	no	partial
Inline images / asciinema export	yes	partial	no	no

gilt is the natural choice for rich-style inline output in a Rust CLI or library — especially when WASM portability, dependency minimisation, or compile-time macros matter.

Documentation

Resource	Where
API docs	docs.rs/gilt
Release notes	CHANGELOG.md
Migration guides	v2 · v1
Live & streaming	docs/live-and-streaming.md
Derive macros	crates/gilt-derive/
Examples	`examples/` — `cargo run --example <name>`
Feature flags	docs.rs/crate/gilt/latest/features

WebAssembly · Unicode · performance

WebAssembly — compiles for wasm32-unknown-unknown with default-features = false (no libc, crossterm, or terminal syscalls). The intended path is record-mode + export with an explicit width:
```
gilt = { version = "2.0", default-features = false, features = ["json", "markdown", "syntax"] }
```
See examples/wasm_export.rs.
Unicode — visible width via unicode-width and grapheme iteration (UAX #29) via unicode-segmentation. CJK fullwidth, single-codepoint / ZWJ / flag emoji, variation selectors, and combining marks are width-correct and never split mid-cluster; truncation snaps to cluster boundaries. Out of scope: bidi/RTL, NFC/NFD normalisation, vertical layout.
Performance — cargo bench runs ~80 criterion benchmarks. See CHANGELOG.md for the v0.11 perf pass (lock-free Live, −46% table render, …).

MSRV & license

MSRV 1.82.0 (for std::sync::LazyLock). Licensed MIT — see LICENSE.

gilt 2.3.0