Show deno scripts

deno-show.ts

const homeDir = () => {
  switch (Deno.build.os) {
    case "linux":
    case "darwin":
      return Deno.env.get("HOME");
    case "windows":
      return Deno.env.get("USERPROFILE");
  }
};
const binaryPathFromName = (name: string) => `${homeDir()}/.deno/bin/${name}`;
const denoFile = async (name: string) =>
  await Deno.readTextFile(binaryPathFromName(name));
const isFileLocal = (file: string) => file.includes("file://");
const filePath = (file: string) => file.match(/file:\/\/(.*)'/)![1];
const httpsPath = (file: string) => {
  // there can be multiple https links if there is an import map for example
  // we'll just pick the last one using  this separator " '"
  const matches = file.match(/(https:\/\/.*)'/)![1].split(" '");
  return matches[matches.length - 1];
};
const downloadRemoteFileAndReturnPath = async (path: string) => {
  const code = await fetch(path).then((r) => r.text());
  const codePath = await Deno.makeTempFile({ suffix: ".ts" });
  await Deno.writeFile(codePath, new TextEncoder().encode(code));
  return codePath;
};

const cmd = () => Deno.env.get("CMD") || "bat";
const exec = async (file: string, cmd: string) => {
  const cmdIter = cmd.split(" ");
  return await Deno.run({
    cmd: [cmdIter[0], ...cmdIter.slice(1), file],
  }).status();
};

const listAll = async () => {
  const files = Deno.readDir(`${homeDir()}/.deno/bin`);
  for await (const file of files) {
    if (file.name === "deno") continue;
    console.log(
      `- ${file.name} (${
        isFileLocal(await denoFile(file.name)) ? "local" : "remote"
      })`,
    );
  }
};

if (import.meta.main) {
  const args = Deno.args;
  if (args.length !== 0) {
    const file = await denoFile(args[0]);
    let codePath;
    if (isFileLocal(file)) {
      codePath = filePath(file);
    } else {
      codePath = await downloadRemoteFileAndReturnPath(httpsPath(file));
    }
    await exec(codePath, cmd());
  } else {
    await listAll();
  }
}