#!/usr/bin/node
// Server side syntax highlight with Shiki https://shiki.matsu.io/
// This script is replacement for pygments/highlight for cgit
// Shiki is installed with `npm install -g shiki`
// input: filename, stdin - source file. Outputs the highligted html to stdout.
import { argv, stdin, stdout } from 'node:process';
import { codeToHtml } from "/usr/lib/node_modules/shiki/dist/index.mjs";

async function highlight(syntax) {
    stdin.on("data", async (data) => {
        const text = Buffer.from(data).toString("utf8");
        const html = await codeToHtml(text, {
            lang: syntax,
            theme: "gruvbox-dark-soft"
        });
        stdout.write(html);
    });
    return true
}

const filename = argv[1];
const lang = filename.split(".")[1];
highlight(lang);