bug#31719: Chains of dependencies getting longer

[Björn Höfling]

On Mon, 01 Mar 2021 22:33:55 +0100
Ludovic Courtès <ludo@gnu.org> wrote:

> It must be a recent regression.  I think this is an unintended
> side-effect of 44425e1f2a96aee39a21dff634abb9b77b44261e and
> 84805ef205b7fa12bfaa7b23da06993cab64c40b (see
> <https://issues.guix.gnu.org/41177>):
> 
> --8<---------------cut here---------------start------------->8---
> $ guix time-machine --commit=44425e1f2a96aee39a21dff634abb9b77b44261e
> -- build openjdk -n 2,135.9 MB would be downloaded:
>    /gnu/store/wd9jyzy7i2dxbxahc0pa8mq22any08zx-openjdk-9.181-jdk
>    /gnu/store/7zxhm2xmyqds8hvlhifi9d16p9ln9k4b-openjdk-9.181
>    /gnu/store/j5sh6c7qhm6vis6fvjyxs2jch9dhz085-openjdk-10.46-jdk
>    /gnu/store/7w3vd4y0jac7d74gw62qmfv7br11k64r-openjdk-10.46
>    /gnu/store/0sb9z8ds8ly7pwmviaqixq9wq1rp13g5-openjdk-11.28-jdk
>    /gnu/store/4nf35d4v363bxrfmp85sk671swzmbj5k-openjdk-11.28
>    /gnu/store/iwi28gcfxrsq541367m4hnp44jnnrkdq-openjdk-12.33-jdk
>    /gnu/store/2w5gg7v9sy54s1jfnymgvg6qwqnkzr8h-openjdk-13.0-jdk
>    /gnu/store/sgqw343zlqqn4vpdq4v9m4jy6ar9i99f-openjdk-14.0-doc
>    /gnu/store/8l4pb8rh9zbqjn14ipbps7nn8wd0jg4w-openjdk-14.0-jdk
>    /gnu/store/1d5bzdzrir8k13bkclx3a9cq59gw5j4h-openjdk-14.0
> --8<---------------cut here---------------end--------------->8---
> 
> Björn, WDYT?  I suppose we need to filter out some library names in
> ‘patch-jni-libs’?

Ouch. While installing a JDK last week, I had the same feeling that the
dependency chain down was a bit too long, but then forgot to look at it
again. 

When I read today Andreas' email, it popped up again ... I will have a
look at it.

> While at it, we should add a #:disallowed-references keyword to
> prevent that from popping up in the future.

I wasn't aware of this and will also have a look.

Björn

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