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export async function requires(...executables: string[]) {  const where = Deno.build.os === "windows" ? "where" : "which";
  for (const executable of executables) {    const process = Deno.run({      cmd: [where, executable],      stderr: "null",      stdin: "null",      stdout: "null",    });
    if (!(await process.status()).success) {      console.error(`Could not find required build tool ${executable}`);    }  }}
export async function run(  msg: string,  cmd: string[],  env?: { [key: string]: string },) {  console.log(msg);
  const process = Deno.run({ cmd, env });
  if (!(await process.status()).success) {    console.error(`${msg} failed`);  }}