xdg-open (WSL)

xdg-open

#!/bin/bash
exec deno run --cached-only -qA /usr/bin/xdg-open.ts "$@"

xdg-open.ts

import { Command } from "https://deno.land/x/cliffy@v0.25.7/command/mod.ts#^";

const CMD_EXE = `/mnt/c/Windows/System32/cmd.exe`;
const EXPLORER_EXE = `/mnt/c/Windows/explorer.exe`;

/**
 * Converts a POSIX (eg: /mnt/c/Windows) to a WIN32 (eg: C:\Windows) path.
 */
const convertPosixToWin32Path = async (input: string) => {
  const p = Deno.run({ cmd: ["wslpath", "-aw", input], stdout: "piped", stderr: "piped" });
  const r = await Promise.all([p.status(), p.output(), p.stderrOutput()]);
  if (!r[0].success) {
    throw new Error(`failed to convert '${input}' to a win32 path: ${new TextDecoder().decode(r[2])}`);
  }
  return new TextDecoder().decode(r[1]);
};

/**
 * Escape an argument string to be suitable to be passed to cmd.exe on Windows
 *
 * see: https://stackoverflow.com/questions/29213106
 */
const escapeForCmdExe = (input: string) =>
  (input.match(/(["\s])/) ? `"${input.replace('"', '\\"')}"` : input)
    .replace(/([()%!^"<>&|])/, "^$1");

await new Command()
  .name("xdg-open")
  .version(import.meta.url)
  .description(`
    Drop-in replacement for xdg-open on WSL systems that will,
    via WSL Interop., open native Windows applications.

    If the argument is a url starting with http(s) it is opened
    with the default Windows handler, typically your browser.

    If the argument is a filename, first its true location is determined.
    Then if the file is on the NTFS filesystem, it is passed as a win32
    path (eg: C:\\\\Users\\\\foo) to Windows for handling.

    However if it is on the WSL filesystem, it is transformed to a WSL UNC path
    (eg: \\\\wsl.localhost\\\\Ubuntu\\\\home\\\\foo) and passed to Windows for handling.

    credit: <https://github.com/cpbotha/xdg-open-wsl>

    FWIW: The only real reason I re-wrote it is for packaging purposes.
    Python is just such a pain in the arse IMO. Deno on the other is a
    super simple, single binary install.
  `)
  .arguments("<path-or-url:string>")
  .action(async (_, pathOrUrl) => {
    // Detect file:// URLs strip the prefix so we don't think it's some other URL.
    pathOrUrl = pathOrUrl.startsWith("file://") ? pathOrUrl.replace("file://", "") : pathOrUrl;

    // Detect URLs of the form protocol://address
    // Pass them directly to Windows as is & hope it knows what to do.
    if (pathOrUrl.match(/^.*:\/\/.*$/)) {
      Deno.exit(
        (await Deno.run({
          cmd: [
            CMD_EXE,
            "/c",
            "start",
            escapeForCmdExe(pathOrUrl),
          ],
          cwd: `/mnt/c`,
        }).status()).code,
      );
    }

    // Otherwise assume we have a filesystem path.
    // Pass it to explorer.exe
    Deno.exit(
      (await Deno.run({
        cmd: [
          EXPLORER_EXE,
          await convertPosixToWin32Path(pathOrUrl),
        ],
      }).status()).code,
    );
  })
  .parse();