Re: [Qemu-devel] Cryptic errors from PIP install if missing openssl-devel

[Cleber Rosa <crosa@redhat.com>]

On Thu, Sep 05, 2019 at 11:06:18AM -0300, Eduardo Habkost wrote:
> On Thu, Sep 05, 2019 at 09:38:24AM -0400, Cleber Rosa wrote:
> > On Thu, Sep 05, 2019 at 12:09:24PM +1000, David Gibson wrote:
> > > On Wed, Sep 04, 2019 at 03:57:17PM -0400, Cleber Rosa wrote:
> > > > 
> > > > Hi David,
> > > > 
> > > > I've pushed a branch here (most of the commits have already been sent
> > > > separately):
> > > > 
> > > >    https://github.com/clebergnu/qemu/tree/ppc64
> > > > 
> > > > I've tested on a RHEL 8 ppc64le Power 9, and it seems to work for me.
> > > > My steps for building QEMU:
> > > > 
> > > >   - Configured with: '/home/cleber/src/qemu/configure' '--enable-slirp=git' '--python=/usr/bin/python3' '--target-list=x86_64-softmmu,ppc64-softmmu,arm-softmmu,aarch64-softmmu,mips-softmmu,mipsel-softmmu,mips64-softmmu,mips64el-softmmu,sh4-softmmu,s390x-softmmu,alpha-softmmu,m68k-softmmu,riscv64-softmmu'
> > > >   - make
> > > >   - make check-acceptance
> > > > 
> > > > Would you be able to test if that branch works smoothly for you?
> > > 
> > > So, with this tree I'm no longer getting problems if openssl-devel is
> > > not installed, so that much looks good.
> > > 
> > > I am getting some different errors - I was seeing this before (with
> > > openssl-devel installed) sometimes, but only sometimes.  I haven't yet
> > > worked out a pattern for when they appeared.  They also don't appear
> > > to be fatal, the rest of the tests seem to be running ok.  Any ideas?
> > > 
> > >  VENV    /home/dwg/qemu/build/rhel8/tests/venv
> > >   PIP     /home/dwg/qemu/tests/requirements.txt
> > >   AVOCADO tests/acceptance
> > > Error running method "run" of plugin "html": 'Namespace' object has no attribute 'get'
> > > Error running method "run" of plugin "varianter_cit": 'Namespace' object has no attribute 'get'
> > 
> > Hi David,
> > 
> > Yes, those should not be fatal.  Anyway, they are caused by two things:
> > 
> >  1) A second set of Avocado plugins installation with different versions
> >     than the Avocado installation on QEMU's tests venv
> > 
> >  2) The tests' venv, which is created with "--system-site-packages",
> >     option that is described as "Give the virtual environment access
> >     to the system site-packages dir."
> > 
> > The motivation to have "--system-site-packages" is that, if the user
> > had any of the "requirements.txt" depedencies installed system wide,
> > the venv would simply use it and skip downloads.  Maybe we should make
> > that an optional feature, disabled by default, so that the test's venv
> > is better isolated and more predictable by default.
> > 
> > Eduardo,
> > 
> > I remember we discussed #2, so your opinion is appreciated here.
> 
> I think I was the person who insisted for --system-site-packages.
> Considering that we're often using very recent versions of
> Avocado, maybe trying to use system-provided Avocado modules by
> default wasn't a good idea after all.
> 
> Making --system-site-packages optional and not enabling it by
> default sounds like a reasonable workaround.
>

OK, agreed.

FIY, given the fact that pip itself keeps a local cache, not using
"--system-site-packages" this shouldn't be much of a hit when it
comes to downloads.

Cheers,
- Cleber.

> -- 
> Eduardo
>