[arch-general] How to have multiple JDKs parallel?

[ProgAndy]

Am 17.09.18 um 18:20 schrieb Guillaume ALAUX via arch-general:
> On Mon, Sep 17, 2018 at 5:48 PM Carsten Mattner via arch-general
> <arch-general at archlinux.org> wrote:
>> On 9/17/18, Eli Schwartz via arch-general <arch-general at archlinux.org> wrote:
>>
>>> So essentially what you really want is a way for pacman to remember your
>>> choice. That would require pacman modify its configuration which is
>>> something that goes against the current architecture... What would happen
>>> instead is pacman.conf could be used to configure this.
>>>
>>> I'm not sure if IgnorePkg or HoldPkg would have an effect here...
>> The way I read it, what's being suggested is something like Debian's
>> update-alternatives. https://wiki.debian.org/DebianAlternatives
>>
>> Or a JVM version manager ala pyenv etc. Not sure.
> Just to give some backing: here is the official explanation of what
> has already been stated before about JDK versions:
>
> "[…] non‑LTS releases are considered a cumulative set of
> implementation enhancements of the most recent LTS release. Once a new
> feature release is made available, any previous non‑LTS release will
> be considered superseded. For example, Java SE 9 was a non‑LTS release
> and immediately superseded by Java SE 10 (also non‑LTS), Java SE 10 in
> turn is immediately superseded by Java SE 11." [0]
>
> So keeping OpenJDK 9 in our repo while OpenJDK 10 is out would be the
> same as keeping say OpenJDK 8.u181 while OpenJDK 8.u182 is out! Even
> though I can understand the (developer) use case, this is clearly out
> of Arch Linux' scope.
>
> [0] http://www.oracle.com/technetwork/java/javase/eol-135779.html
>
> Guillaume

This might be a use case for remakepkg to remove the replaces-entry in
the java10 packages.

https://bbs.archlinux.org/viewtopic.php?pid=1771005

---
Andreas