bug#31719: Chains of dependencies getting longer

["Ludovic Courtès" <ludo@gnu.org>]

Hi!

Andreas Enge <andreas@enge.fr> skribis:

> Am Mon, Mar 01, 2021 at 11:04:02AM +0100 schrieb Ludovic Courtès:
>> Andreas Enge <andreas@enge.fr> skribis:
>> > trying a "guix build openjdk", I see this:
>> > 2136.0 MB would be downloaded
> ...
>> >    /gnu/store/ymyvcc0871lwbnkv5acf5lldv0ahm5z1-openjdk-9.181-jdk
>> >    /gnu/store/3hb80r2l48ix8pq2kvcsr1i9aj76d681-openjdk-9.181
> ...
>> >    /gnu/store/bjvy5ab6f0gff52m808vzcn3rw55yxjn-openjdk-14.0-doc
>> >    /gnu/store/r8kxk031fighc4dxr57nl0wirzhk8v08-openjdk-14.0-jdk
>> >    /gnu/store/25kx1vna763xh4mpszp4p4sy4j6iifs3-openjdk-14.0
>> 
>> Weird.  I see this:
>> 
>> --8<---------------cut here---------------start------------->8---
>> $ guix build openjdk -n
>> 369.8 MB would be downloaded:
>>    /gnu/store/676kcvxnnjfcy960fy4xkr10fbn3ciay-openjdk-14.0-doc
>>    /gnu/store/dk8rkrfkdgsmy1a33n0sc39fhqggy1nh-openjdk-14.0-jdk
>>    /gnu/store/ylakfs5fwq5sqsk5zbkwwf2d1lp0jfxs-openjdk-14.0
>
> It is strange we do not see the same thing! I just tried it again, and am
> getting the same result as above. Notice that openjdk@14 is available as a
> substitute, but still all previous versions are downloaded, while nothing
> is built.

Wait, with a newer commit, I get the whole chain as well:

--8<---------------cut here---------------start------------->8---
$ guix build openjdk -n
2,135.0 MB would be downloaded:
   /gnu/store/ymyvcc0871lwbnkv5acf5lldv0ahm5z1-openjdk-9.181-jdk
   /gnu/store/3hb80r2l48ix8pq2kvcsr1i9aj76d681-openjdk-9.181
   /gnu/store/52bp22jrvwfqa5fmlv2y5vxcir74m8jb-openjdk-10.46-jdk
   /gnu/store/bp86qd2vgaqahqam3n89xl1wz02g0srs-openjdk-10.46
   /gnu/store/a8f5ksk3gb4i1wrn7m5fm5ijc0zwwg2w-openjdk-11.28-jdk
   /gnu/store/9ni61z4nhvkrxbzj6gwip8zrb7zbkx6l-openjdk-11.28
   /gnu/store/837pl2vmq9haiw3kmsnh72fkwvcljipk-openjdk-12.33-jdk
   /gnu/store/ll5dgf42x9smclrc1mx4gyk3dl683m77-openjdk-13.0-jdk
   /gnu/store/bjvy5ab6f0gff52m808vzcn3rw55yxjn-openjdk-14.0-doc
   /gnu/store/r8kxk031fighc4dxr57nl0wirzhk8v08-openjdk-14.0-jdk
   /gnu/store/25kx1vna763xh4mpszp4p4sy4j6iifs3-openjdk-14.0
$ guix describe
Generacio 176   Mar 01 2021 11:39:49    (nuna)
  guix 7ca43b0
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 7ca43b0a1e2215abe0df0708f31decace8e68911
--8<---------------cut here---------------end--------------->8---

But again, from that Feb. 4th commit, everything looks fine:

--8<---------------cut here---------------start------------->8---
$ guix time-machine --commit=5ae09d7979a0696d862b9555314eab199f7ce576 -- build openjdk -n
369.8 MB would be downloaded:
   /gnu/store/676kcvxnnjfcy960fy4xkr10fbn3ciay-openjdk-14.0-doc
   /gnu/store/dk8rkrfkdgsmy1a33n0sc39fhqggy1nh-openjdk-14.0-jdk
   /gnu/store/ylakfs5fwq5sqsk5zbkwwf2d1lp0jfxs-openjdk-14.0
--8<---------------cut here---------------end--------------->8---

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’?

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

Thanks,
Ludo’.