@flex-development/pathe/dist/lib/root.mjs

Universal drop-in replacement for node:path

import canParseURL from "#internal/can-parse-url";
import { DRIVE_PATH_REGEX } from "#internal/constants";
import validateURLString from "#internal/validate-url-string";
import delimiter from "#lib/delimiter";
import isSep from "#lib/is-sep";
import toPosix from "#lib/to-posix";
function root(input) {
  validateURLString(input, "input");
  input = String(toPosix(input));
  if (input.length) {
    let end = 0;
    let onlyRoot = false;
    if (isSep(input)) {
      onlyRoot = true;
    } else {
      let offset = 0;
      if (canParseURL(input)) {
        const { hostname, pathname, protocol } = new URL(input);
        if (hostname) {
          if (protocol === "file:") {
            offset = protocol.length;
          } else {
            end = protocol.length + hostname.length + 2;
          }
        } else if (input === protocol) {
          onlyRoot = true;
          offset = -1;
        } else {
          offset = input.lastIndexOf(pathname);
          if (DRIVE_PATH_REGEX.test(pathname.slice(1))) offset++;
        }
      }
      if (isSep(input[offset])) {
        end = offset + 1;
        if (isSep(input[end])) {
          let j = end + 1;
          let last = j;
          while (j < input.length && !isSep(input[j])) j++;
          if (j < input.length && j !== last) {
            last = j;
            while (j < input.length && isSep(input[j])) j++;
            if (j < input.length && j !== last) {
              last = j;
              while (j < input.length && !isSep(input[j])) j++;
              if (j === input.length) end = j;
              else if (j !== last) end = j + 1;
            }
          }
        }
      } else if (DRIVE_PATH_REGEX.test(input.slice(offset))) {
        end = input.indexOf(delimiter, offset) + 1;
        if (input.length <= end) {
          onlyRoot = true;
        } else if (isSep(input[end])) {
          if (input.length === ++end) onlyRoot = true;
        }
      }
    }
    if (end || onlyRoot) return onlyRoot ? input : input.slice(0, end);
  }
  return "";
}
var root_default = root;
export {
  root_default as default
};