Hi,
Considering this with revision a03936a:
guix gc
guix install python-ipython -p tools
guix gc
guix install python-ipython -p tools
I am surprised that:
1. the second GC collects things
2. the second install downloads things
especially by this line:
python-ipython-7.27.0 892KiB 4.6MiB/s 00:00 [##################] 100.0%
Well, it is because of grafts. The profile contains the grafted
version and the installation expect first the non-grafted for computing
the graft. For instance:
--8<---------------cut here---------------start------------->8---
$ guix gc --list-dead | grep ipython
finding garbage collector roots...
determining live/dead paths...
/gnu/store/xmw4vxabnkm7vwa0ywfcqcmknbnia0c3-python-ipython-7.27.0
guix build python-ipython --no-grafts
/gnu/store/xmw4vxabnkm7vwa0ywfcqcmknbnia0c3-python-ipython-7.27.0
--8<---------------cut here---------------end--------------->8---
When something is grafted, is it possible to consider the non-grafted as
a "derivation", i.e., control the GC with 'gc-keep-derivations'.
Or the grafted could keep a reference to the non-grafted?
Well, I was expecting that this composition:
guix gc && guix install
was "idempotent" in a way. :-) And to me, the fact that it is not is
somehow a bug. Maybe, it is already well-known and not considered as
bug.
Cheers,
simon
