Terminal Formatter

ANSI escape codes for shell output.

Options

Runtime	Options
Rust	language, theme
Elixir	language, theme
JavaScript	language, theme
Java	withLang(), withTheme(), withFormatter(Formatter.TERMINAL)
CLI	default formatter, --theme

Example

JavaScript

import {highlight} from '@lumis-sh/lumis'
import {terminal} from '@lumis-sh/lumis/formatters'
import javascript from '@lumis-sh/lumis/langs/javascript'
import dracula from '@lumis-sh/themes/dracula'

const ansi = await highlight('const x = 1', terminal({language: javascript, theme: dracula}))
console.log(ansi)

Rust

use lumis::{highlight, TerminalBuilder, languages::Language, themes};

let ansi = highlight(
    "fn main() {}",
    TerminalBuilder::new()
        .language(Language::Rust)
        .theme(Some(themes::get("dracula").unwrap()))
        .build()
        .unwrap(),
);

println!("{}", ansi);

Elixir

Lumis.highlight!(
  "fn main() {}",
  formatter: {:terminal, language: "rust", theme: "dracula"}
)

Java

import io.roastedroot.lumis4j.core.Formatter;
import io.roastedroot.lumis4j.core.Lang;
import io.roastedroot.lumis4j.core.Lumis;
import io.roastedroot.lumis4j.core.Theme;

var lumis = Lumis.builder().build();

var highlighter = lumis.highlighter()
    .withLang(Lang.JAVASCRIPT)
    .withTheme(Theme.DRACULA)
    .withFormatter(Formatter.TERMINAL)
    .build();

var ansi = highlighter.highlight("const x = 1").string();
System.out.println(ansi);

lumis.close();

CLI

lumis highlight main.rs --theme dracula
# same as: lumis highlight main.rs --formatter terminal --theme dracula

Output format

Terminal output is plain text wrapped in ANSI escape sequences:

\x1b[38;2;229;192;123mfn\x1b[0m \x1b[38;2;97;175;239mmain\x1b[0m() {}

• the source stays as terminal text, not HTML
• ANSI escape sequences set foreground color and text styles
• \x1b[0m resets formatting between styled segments

When to use it

• CLI tools
• logs and local scripts
• previewing highlighted code in a terminal