Launch browser from BashOnWindows / WSL

[mstrelan]

I'm using drush via BashOnWindows and wondering if it's possible to launch a browser with drush uli.

Outside of drush I can launch a browser with cmd.exe /c start "https://github.com/drush-ops/drush" and wondering if I can coerce drush to run a similar command. I tried drush uli --browser="cmd.exe /c start" but to no avail.

I've also tried explorer.exe "https://github.com/drush-ops/drush" which opens the default browser but again doesn't work as a drush option for the --browser parameter.

Is this a drush limitation or something else?

UPDATE: I tried with verbose output:

No graphical display appears to be available, not starting browser.

Can this be bypassed?

[mstrelan]

I'm not sure the best way to detect BashOnWindows, but removing this block allows the browser to launch with --browser="explorer.exe"

if (!drush_get_context('DRUSH_SIMULATE') && !getenv('DISPLAY') && !drush_is_windows() && !drush_is_osx()) {
  drush_log(dt('No graphical display appears to be available, not starting browser.'), 'notice');
  return FALSE;
}

I can also add this further down to automatically detect explorer.exe.

if (drush_shell_exec('which explorer.exe')) {
  $browser = 'explorer.exe';
}

But it needs to appear as the first condition, because open also exists on BashOnWindows but doesn't launch the browser.

[mstrelan]

I think we need a bash_is_wsl() function. Apparently the best way to check for WSL is to grep "Microsoft" in /proc/sys/kernel/osrelease or /proc/version.