Crate rusty_figlet 

rusty-figlet

Rust port of cmatsuoka’s figlet(6) v2.2.5 with an in-house FIGfont 2.0 parser, all six horizontal smush rules + universal, 12 bundled .flf fonts via include_bytes!, terminal-width-aware layout, color/rainbow output, byte-equal Strict-mode upstream compatibility, and a typed library API.

Library API quick tour

use rusty_figlet::{FigletBuilder, Font};

let banner = FigletBuilder::new()
    .font(Font::Standard)
    .width(80)
    .build()
    .expect("build")
    .render("Hello")
    .expect("render");

for line in banner.lines() {
    println!("{line}");
}

Default features

default = ["cli"] enables the CLI binary surface (clap, clap_complete, anstyle, termcolor, terminal_size). Library consumers should depend on rusty-figlet with default-features = false to strip every CLI-only dep so only thiserror and the in-house FIGfont parser are pulled in (per FR-051 + AD-001).

Error handling

FigletError is #[non_exhaustive]; downstream pattern matches MUST include a wildcard _ arm (per AD-013).

Modules

strict

Hand-rolled Strict-mode argv parser (AD-007). Public so the rusty-figlet binary can dispatch to its byte-equal upstream diagnostics; the SemVer policy on this module’s surface matches the rest of the public library API per FR-050. Hand-rolled Strict-mode argv parser per AD-007.

Structs

Banner

A rendered ASCII-art banner.

Figlet

A reusable renderer holding a parsed Font and resolved layout settings.

FigletBuilder

Fluent builder for Figlet renderers.

JustifyFlags

Sequenced justify-flag occurrences from the command line.

LayoutFlags

Sequenced layout-flag occurrences from the command line.

Enums

CompatibilityMode

Compatibility mode that governs argv parsing + rendering rules.

FigletError

All fallible operations in rusty-figlet return Result<T, FigletError>.

Font

Bundled-font selector and external-file escape hatch.

Justify

Horizontal justification mode.

JustifyFlag

One occurrence of a justify-class flag, captured in argv order.

LayoutFlag

One occurrence of a layout-class flag, captured in argv order so LayoutResolver::resolve can apply last-wins semantics per FR-023.

Functions

clamp_input_latin1

Clamp UTF-8 input down to Latin-1 (ISO-8859-1) bytes per FR-044.

resolve_justify_for

Re-export of [layout::resolve_justify] for the rusty-figlet binary’s CLI wiring path (T103 + T109). Translates a sequence of JustifyFlag occurrences into the resolved Justify value via last-wins semantics per FR-022.

resolve_width_forcli

Re-export of [width::resolve_width] for the rusty-figlet binary’s CLI wiring path (T106 + T109). Library consumers that need to resolve a width budget under the same precedence ladder may call this helper directly. CLI-gated because the underlying lookup depends on terminal_size.