WSL has no xdg-open and no Linux browser, so anything that shells out to one
fails with:
exec: "xdg-open,x-www-browser,www-browser": executable file not found in $PATH
kubelogin's interactive login hits this, which matters because interactive is
the mode the shared cluster kubeconfig uses and the mode documented for
re-authenticating after a PIM activation.
Ships an xdg-open on PATH that hands the URL to Windows via powershell.exe,
falling back to explorer.exe, and points $BROWSER at it for tools that read the
variable instead of calling xdg-open. wslu would be the conventional answer but
has been removed from nixpkgs after upstream archived the project.
Emma Thorpe