[Pkg-zsh-devel] Bug#707760: zsh: Alternatives broken for long time during upgrade from zsh4 to zsh5

[Axel Beckert]

Hi Sven,

Sven Joachim wrote:
> > A few rough ideas to make this easier for the user:
> >
> > * Use Pre-Depends in zsh + zsh-common relationship
> > * Maybe add some hack in the preinst script
> 
> How about adding a symlink /bin/zsh4 -> zsh5 in the zsh package?  Not
> extremely pretty, but it should work.

What about putting a shell script at /bin/zsh4 which more or less
looks this?

  #!/bin/sh
  
  echo "$0 is deprecated, please switch to /bin/zsh or /usr/bin/zsh" 1>&2
  exec /bin/zsh5 "$@"

Or maybe even

  #!/bin/sh
  set -e
  
  echo "$0 is deprecated, please switch to /bin/zsh or /usr/bin/zsh" 1>&2
  /bin/zsh5 "$@"
  exit 1

Main reason why I currently prefer this over the pure symlink is that
don't want people to continue to use /bin/zsh4 just because it still
exists.

And adding a symlink to package and then removing it in postinst is
probably far too evil and will make piuparts, debsums and maybe even
the policy cry out loudly.

A variant of that is possibly to always divert that link away in
postinst, but then again, that's probably overkill. And I have no idea
where to divert it to.

> In the long run, /{usr,}/bin/zsh should probably not be handled by
> alternatives anymore since the zsh-beta package is gone,

Definitely.

> but now might not be the best time to implement this.

Yep.

		Regards, Axel
-- 
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