Re: Getting Unit Test Results Out Of Guix Build

[raingloom <raingloom@riseup.net>]

On Mon, 25 Oct 2021 13:30:40 +0100
Phil Beadling <phil@beadling.co.uk> wrote:

> Hi all,
> 
> Given Guix builds packages in a container, is there any way of
> getting a file out of the build container for further processing?
> 
> In my use case - I generate some junit test XML output during the
> build process and want to render that to a webpage rather than send
> it to stdout as part of the build process?
> 
> It is possible to export the nar file using guix archive --export, and
> possible to keep failed build artifacts using -K, but there doesn't
> seem to be a way to dump out a file from a successful build?
> 
> Is this against the philosphy of purely-functional builds?  Obviously
> it is a side-effect to dump out an XML file, but no more so than
> sending build logs to stdout?  Is it possible to dump outputs without
> breaking referential transparency on the inputs - i.e. it should be
> possible to configure a directory that is write-only for the
> container, but can be read by users outside the container?
> 
> Or am I missing something obvious?
> 
> Thanks,
> Phil.

Couldn't this just be another package output? Maybe not the most elegant
solution, since those are not usually used this way, but it can sort of
work. Just add a phase that copies the logs to the "tests" output if
it exists. Kinda like how the "debug" is currently used.