[tlu] TeX Live Utility (MacTeX) critical update failure

[Adam R. Maxwell]

Hi, Karl,

> On Nov 16, 2023, at 13:47 , Karl Berry <karl at freefriends.org> wrote:
> 
>    ./runme.sh: no xz.[universal-darwin][.exe] binary for 
>    /usr/local/texlive/2023/bin/universal-darwin in 
>    /var/folders/c9/mqg453cx4bg50wwbqxsr4x0w0000gn/T/selfgz3210124610/installer/xz.
> 
> 1) Technically tlu at tug.org is a better place to report TLU errors,
> although I see Adam is on this list (tex-live). Cc-ing for the heck of it.
> 
> 2) It's unclear to me why the xz executable is not there for TLU, since
> it is there in the repo's .../installer/xz directory:
> $ ls -l tlpkg/installer/xz/xz.universal-darwin
> -rwxrwxr-x. 1 karl root 451744 Mar  2  2022 tlpkg/installer/xz/xz.universal-darwin*
> 
> Also, the self-update worked on (all?) other platforms.

For hysterical raisins, TLU uses update-tlmgr-latest.sh, rather
than executing tlmgr's self-update. I've never bothered to learn
exactly how update-tlmgr-latest.sh works, but I think runme.sh is
looking for xz in the moral equivalent of /tmp/installer/xz, but
whether it wants to execute it or copy it, I can't say. Does that
sound possible?

thanks,
Adam