Deno CLI Template Literal

index.ts

import { $ } from "./template.ts";

const p = await $`cmd /c echo hello`;
console.log(new TextDecoder().decode(p));
//=> hello

template.ts

export async function $(pieces: TemplateStringsArray, ...args: Array<unknown>) {
  let compiled = pieces[0], i = 0;
  for (; i < args.length; i++) compiled += args[i] + pieces[i + 1];
  for (++i; i < pieces.length; i++) compiled += pieces[i];
  const cmd = compiled.split(/\s+/);
  const process = Deno.run({ cmd, stdout: "piped", stderr: "piped" });
  const { code } = await process.status();
  if (code === 0) {
    return await process.output();
  } else {
    return await process.stderrOutput();
  }
}