Re: debuginfo/source improvements vs mass rebuild

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Hi,

Sorry for the late response.
I am currently on vacation with limited internet access.

On Sun, Aug 13, 2017 at 01:22:20AM +0200, Jan Kratochvil wrote:
> On Mon, 31 Jul 2017 13:16:29 +0200, Mark Wielaard wrote:
> > - Putting extra files under /usr/lib/debug causes:
> >   error: Installed (but unpackaged) file(s) found:
> >    /usr/lib/debug/usr/lib64/__pycache__/libpython3.6dm.so.1.0.debug-gdb.cpython-36.opt-1.pyc
> >    /usr/lib/debug/usr/lib64/__pycache__/libpython3.6dm.so.1.0.debug-gdb.cpython-36.opt-2.pyc
> >    /usr/lib/debug/usr/lib64/__pycache__/libpython3.6dm.so.1.0.debug-gdb.cpython-36.pyc
> >    /usr/lib/debug/usr/lib64/__pycache__/libpython3.6m.so.1.0.debug-gdb.cpython-36.opt-1.pyc
> >    /usr/lib/debug/usr/lib64/__pycache__/libpython3.6m.so.1.0.debug-gdb.cpython-36.opt-2.pyc
> >    /usr/lib/debug/usr/lib64/__pycache__/libpython3.6m.so.1.0.debug-gdb.cpython-36.pyc
> >    /usr/lib/debug/usr/lib64/libpython3.6dm.so.1.0.debug-gdb.py
> >    /usr/lib/debug/usr/lib64/libpython3.6m.so.1.0.debug-gdb.py
> > 
> > https://bugzilla.redhat.com/show_bug.cgi?id=1476593
> > 
> > This is caused by split debuginfo checking which file corresponds to
> > which main/sub-package. Without split debuginfo anything found
> > under /usr/lib/debug is just put into the -debuginfo package, no
> > questions asked.
> > 
> > The immediate workaround is to add the following to your spec file:
> > %undefine _debuginfo_subpackages
> > 
> > This disables split debuginfo packages and just generates one big
> > -debuginfo packages with everything under /usr/lib/debug/ included.
> > 
> > But this might or might not be a packaging bug. In particular if it
> > contains generated pyc files those probably really shouldn't be there.
> 
> Why not?  For *.py files their *.pyc should be also packaged.

Yes. But they are scripts instead of plain debug data or source
files. The *.pyc files might not be generated automatically when such
scripts are put in the automatic generated -debuginfo or -debugsource
packages. Having them in the debuginfo and under /usr/lib/debug will
prevent the debuginfo/source packages from being parallel installable
for example.

> > The basic issue is that we have been trying to make the debuginfo
> > packages self-contained and non-conflicting between versions.
> > So you can easily install debuginfo for different (bi)arches or
> > versions. But some packages assume that if they drop anything
> > under /usr/lib/debug it will just magically appear in the debuginfo
> > package (which has been historically true). But with the split
> > debuginfo we have to make a choice which subpackage it belongs
> > to. Best rpm fix would probably be to add such files to the "main"
> > debuginfo package.
> > 
> > But it would probably be better to move these files to the
> > python3-devel package. Maybe we should discuss with the gdb
> > maintainers how/where they would like to see these gdb python
> > extensions installed. I doubt the -debuginfo package really is
> > the place for them anyway.
> 
> I cannot speak for python3-devel.  But for package "gdb" I get:
> 
> error: Installed (but unpackaged) file(s) found:
>    /usr/lib/debug/usr/bin/__pycache__/gdb-gdb.cpython-36.opt-1.pyc
>    /usr/lib/debug/usr/bin/__pycache__/gdb-gdb.cpython-36.pyc
>    /usr/lib/debug/usr/bin/gdb-gdb.py
> 
> And gdb-gdb.py is useful only for debugging /usr/bin/gdb itself.
> For that one needs gdb-debuginfo.rpm.  And gdb-devel.rpm even does not exist.

The quick workaround if you are blocked right now is to just add
%undefine _debuginfo_subpackages to you spec file. That will stop
rpm from trying to account for every file under /usr/lib/debug.
That of course doesn't fix the underlying issue of having non-debug
files under /usr/lib/debug, but gets you building again.

Long term we will have to figure out a policy to package such
auxiliary scripts.

Cheers,

Mark
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