Re: Inconsistent dnf provides result

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On Sun, Jun 02, 2019 at 08:04:25AM +0100, Sérgio Basto wrote:
> On Sat, 2019-06-01 at 21:47 +0200, Georg Sauthoff wrote:
> > This is caused by use of the %ghost directive in the %files
> > section of the .spec file:
> > 
> >     %files -n dpm-copy-server-mysql
> >     %{_libdir}/dpm-mysql/dpmcopyd
> >     %ghost %{_sbindir}/dpmcopyd
> >     %doc %{_libdir}/dpm-mysql/dpmcopyd.8*
> >     %ghost %{_mandir}/man8/dpmcopyd.8*
> > 
> > Apparently %ghost marks those files as belonging to the package but
> > doesn't include them in the package. Thus, they aren't part of the
> > cpio
> > archive. Common use-case for this seems to be log-files - such that
> > they
> > are removed on package removal.
 
> Sort of, after lines 1023 [1] we understand the reason this package use
> alternatives , the really location on file is /usr/lib64/dpm-

Good find.

> mysql/dpmcopyd.8 so [2] should work 
> 
> [2]
> dnf provides  /usr/lib64/dpm-mysql/dpmcopyd.8  

I never questioned that `dnf provides /usr/lib64/dpm-mysql/dpmcopyd.8`
would work. It does. It's just a non-standard location and thus nothing
I would try when searching for the man page of dpmcopyd with `dnf
provides`.

Note that all the man-pages under Fedora a gzip-compressed, while this
file isn't.

> [1] 
> https://src.fedoraproject.org/rpms/lcgdm/blob/master/f/lcgdm.spec#_1023

But does this even work?

    %{_sbindir}/update-alternatives --install %{_sbindir}/dpmcopyd dpmcopyd \
	      %{_libdir}/dpm-mysql/dpmcopyd 20 \
      --slave %{_mandir}/man8/dpmcopyd.8.gz dpmcopyd.8.gz \
	      %{_libdir}/dpm-mysql/dpmcopyd.8.gz

I mean the archive just contains:

    usr/lib64/dpm-mysql/dpmcopyd.8

where:

    $ file o/usr/lib64/dpm-mysql/dpmcopyd.8
    o/usr/lib64/dpm-mysql/dpmcopyd.8: ASCII text, with escape sequences

While the update-alternatives commands references:

     %{_libdir}/dpm-mysql/dpmcopyd.8.gz

Best regards
Georg

-- 
'If you think this sentence is confusing, then change one pig.'
    (Hofstadter, 2007)
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