@std/path@1.0.1

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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
// This module is browser compatible.

import { encodeWhitespace } from "../_common/to_file_url.ts";
import { isAbsolute } from "./is_absolute.ts";

/**
 * Converts a path string to a file URL.
 *
 * @example Usage
 * ```ts
 * import { toFileUrl } from "@std/path/posix/to-file-url";
 * import { assertEquals } from "@std/assert";
 *
 * assertEquals(toFileUrl("/home/foo"), new URL("file:///home/foo"));
 * assertEquals(toFileUrl("/home/foo bar"), new URL("file:///home/foo%20bar"));
 * ```
 *
 * @param path The path to convert.
 * @returns The file URL.
 */
export function toFileUrl(path: string): URL {
  if (!isAbsolute(path)) {
    throw new TypeError("Must be an absolute path.");
  }

  const url = new URL("file:///");
  url.pathname = encodeWhitespace(
    path.replace(/%/g, "%25").replace(/\\/g, "%5C"),
  );
  return url;
}