Trying out Deno

deno.ts

#!/usr/bin/env -S deno --allow-run

type AbsDir = string;
type AbsFile = string;
type AbsPath = AbsFile | AbsDir;
type RelFile = string;
type RelDir = string;
type Path = RelFile | AbsFile | RelDir | AbsDir;

async function ls(dir: AbsDir): Promise<RelFile[]> {
  const p = Deno.run({
    cmd: ["ls", "-1", "-a", "--color=never", dir],
    stdout: "piped",
  });

  const { code } = await p.status();
  if (code !== 0) {
    throw new Error(`ls failed for '${dir}'`);
  }

  return p.output()
    .then((out) =>
      new TextDecoder()
        .decode(out)
        .split("\n")
        .filter((f) => f && f !== "." && f !== "..")
    );
}

ls("/home/joe").then((files) => files.forEach((f) => console.log({ f })));