Re: Getting Unit Test Results Out Of Guix Build

[raingloom <raingloom@riseup.net>]

On Thu, 4 Nov 2021 13:52:02 +0000
Phil Beadling <phil@beadling.co.uk> wrote:

> Hi,
> 
> On Tue, 26 Oct 2021 at 19:31, Phil <phil@beadling.co.uk> wrote:
> 
> > Hi,
> >
> > raingloom writes:
> >
> >  
> > > 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.  
> >
> > Yes this could work - so for my-package I could just define
> > my-package:tests which would add an extra test directory to the
> > package in the store which I would copy the test results into.
> >
> >  
> I gave this a got it almost working with one significant snag I was
> hoping someone might be able to help with?
> 
> Once the build is complete is possible to retrieve the location of
> the test files using a simple REPL script - In my example this is
> nested in Groovy script in my case which will interpolate the
> ${packageExpression} for me to give a proper Scheme expression (this
> isn't important just mentioning it so the script makes sense):
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> *(use-modules (guix packages)             (gnu packages)
> (guix store)             (guix derivations))(define my-drv
> (with-store store (run-with-store store      (package->derivation
> ${packageExpression}))))(format #t "~a~%" (assoc-ref
> (derivation->output-paths my-drv) "test"))*
> 
> 
> The below details are no overly important (IMHO), but script is fed
> into a Groovy variable called testLocationSCript, and called from
> shell script like so (localCannelSwitch is just a "-L
> /path/to/my/local/channel" variable):
> TESTDIR=`guix repl ${localChannelSwitch} -- <(cat <<<
> '${testLocationScript}')`
> 
> 
> This all works great *until* you actually have a unit test failure -
> then because that unit test failure will fail the "guix build", the
> "package->derivation" command seems to try to rebuild the package,
> which of course fails again for exactly the same reason.as the
> original failure and provides no location for
> derivation->output-paths.
> 
> *So what I need is a way of asking what will the output path be,
> without actually building, or inspite of a build failure?*
> 
> This must be techincally possible because mid-build the output paths
> are available - so they are known ahead of build completion.
> 
> So, does anyone have a way of getting the output directories from Guix
> without first requiring a successful build?
> 
> 
> Thanks!

The --dry-run option is the closest thing that I know of. Not sure what
its Scheme equivalent is.