// Build libghostty-vt as wasm for the terminal extension, from a pinned ghostty, into
// extensions/terminal/ghostty-vt.wasm. Run it as `deno task ghostty`; it needs git and zig 0.16 on PATH.

import { join } from "node:path";

const GHOSTTY = "7ec9e26a29399b30ef78f06985fc75045b3cecb6";

const home = Deno.env.get("HOME") ?? ".";
const source = join(Deno.env.get("XDG_CACHE_HOME") ?? join(home, ".cache"), "berry", "ghostty");
const target = new URL("./ghostty-vt.wasm", import.meta.url);

async function run(cwd: string, program: string, ...args: string[]) {
  console.error(`$ ${program} ${args.join(" ")}`);
  const { success } = await new Deno.Command(program, {
    args,
    cwd,
    stdout: "inherit",
    stderr: "inherit",
  })
    .output();
  if (!success) throw new Error(`${program} failed`);
}

await Deno.mkdir(source, { recursive: true });
await run(source, "git", "init", "--quiet");
await run(
  source,
  "git",
  "fetch",
  "--quiet",
  "--depth",
  "1",
  "https://github.com/ghostty-org/ghostty",
  GHOSTTY,
);
await run(source, "git", "checkout", "--quiet", "--force", "FETCH_HEAD");
await run(
  source,
  "zig",
  "build",
  "-Demit-lib-vt",
  "-Dtarget=wasm32-freestanding",
  "-Doptimize=ReleaseSmall",
);
await Deno.copyFile(join(source, "zig-out", "bin", "ghostty-vt.wasm"), target);
console.error(`built ${target.pathname}`);