Hi Simen, I'm aware of a union build in Guix, but unfortunately have never used it:
https://git.savannah.gnu.org/cgit/guix.git/tree/guix/build/union.scm I recalled it because of this blog post which talks about union packages: https://trivialfis.github.io/linux/2018/06/10/Using-guix-for-development.html Hope it helps! Steve / Futurile On 26 Oct, Simen Endsjø wrote: > > Hi, I'm trying to package some software where I combine various packages into > a > single location. I'll try to explain... > > I have a package P. This package contains a binary, B, some libraries S, and > some libraries R. These are usually packages together, in which case things > just > work, but I need to support adding various versions of some of these packages. > > E.g. I add P@2:out to get everything for that version, but additionally P@1:S > and P@1:R. B can only be added once as it is at the same location, and we > usually use the latest version, but S and R have versioned subdirectories. > This > means S@1 is located at /s/1 and R@2 is located at /r/2. > > Given the shell with P@2:out, P@1:S, P@1:R, I should get a structure like > > /B > /s/1 > /s/2 > /r/1 > /r/2 > > This is the structure you get when installing the packages on other distros > and > operating systems. > > But how can I create such a "virtual package"? I also need to register this > virtual package path in an environment variable so B is able to locate > all S and R versions, P_ROOT. > > Right now only :out works as I cannot get the locations of other P:S and P:R > known to B. The single environment variable can only point at a single path, > and > that path must include the s and r directories with all installed versions. > > How can I solve this problem? > Are there other packages which does something similar I might look at? > > Regards Simen >
