Test whether or not the given path exists by checking with the file system.

Note: do not use this function if performing a check before another operation on that file. Doing so creates a race condition. Instead, perform the actual file operation directly.

Bad:

import { exists } from "https://deno.land/std@0.224.0/fs/mod.ts";

if (await exists("./foo.txt")) {
  await Deno.remove("./foo.txt");
}

Good:

// Notice no use of exists
try {
  await Deno.remove("./foo.txt");
} catch (error) {
  if (!(error instanceof Deno.errors.NotFound)) {
    throw error;
  }
  // Do nothing...
}