12345678910111213141516171819202122232425262728293031323334353637383940414243
import {  getEnvironmentVariable,  cleanWindowsCommand,  exec,  makeUsernameFromId,} from "./utils.ts";
/** * Get the username of the current user. * * It first tries to get the username from the `SUDO_USER` `LOGNAME` `USER` `LNAME` `USERNAME` * environment variables. * * Then falls back to `$ id -un` on macOS / Linux and `$ whoami` on Windows, * in the rare case none of the environment variables are set. * * Requires the `--allow-env` and `--allow-run` flags. * * @returns The username. */export default async function username(): Promise<string | undefined> {  const envVariable = getEnvironmentVariable();  if (envVariable) {    return envVariable;  }
  // First we try to get the ID of the user and then the actual username.  // We do this because in `docker run --user <uid>:<gid>` context,  // we don't have "username" available.  try {    if (Deno.build.os === "windows") {      return cleanWindowsCommand(await exec(["whoami"]));    }
    const userId = await exec(["id", "-u"]);    try {      return await exec(["id", "-un", userId]);    } catch (_) {}
    return makeUsernameFromId(userId);  } catch (_) {}}