Hi!

I have a headless virtual machine (just apache running and I connect via ssh)
with Leap 42.1. Thus no Mesa or X installed.
This maschine I wanted to upgrade to Leap 42.2.
So, I replaced the 42.1 repos with the repos for 42.2. However, a "zypper dup
--no-recommends" pulled Mesa with quite some other graphic related libX* and
libdrm* packages.

I dug around a bit and IMHO python-gobject has now a dependency on all the
graphic stuff. 
Here is the dependency chain I found by trying to uninstall Mesa:
~ # rpm -e --test Mesa
error: Failed dependencies:
        Mesa = 11.2.2 is needed by (installed) Mesa-libGL1-11.2.2-158.1.x86_64
~ # rpm -e --test Mesa-lib
Mesa-libEGL1    Mesa-libGL1     Mesa-libglapi0
~ # rpm -e --test Mesa-libGL1
error: Failed dependencies:
        libGL.so.1()(64bit) is needed by (installed)
libcairo2-1.15.2-4.2.x86_64
~ # rpm -e --test libcairo2
error: Failed dependencies:
        libcairo.so.2()(64bit) is needed by (installed)
libpango-1_0-0-1.40.1-1.5.x86_64
~ # rpm -e --test libpango-1_0-0
error: Failed dependencies:
        libpango-1.0.so.0()(64bit) is needed by (installed)
typelib-1_0-Pango-1_0-1.40.1-1.5.x86_64
        libpangocairo-1.0.so.0()(64bit) is needed by (installed)
typelib-1_0-Pango-1_0-1.40.1-1.5.x86_64
        libpangoft2-1.0.so.0()(64bit) is needed by (installed)
typelib-1_0-Pango-1_0-1.40.1-1.5.x86_64
        libpangoxft-1.0.so.0()(64bit) is needed by (installed)
typelib-1_0-Pango-1_0-1.40.1-1.5.x86_64
~ # rpm -e --test typelib-1_0-Pango-1_0
error: Failed dependencies:
        typelib(Pango) is needed by (installed)
python-gobject-3.20.1-3.2.x86_64
~ # rpm -e --test python-gobject
error: Failed dependencies:
        python-gobject is needed by (installed) dbus-1-python-1.2.0-7.34.x86_64
~ # rpm -e --test dbus-1-python
error: Failed dependencies:
        dbus-1-python is needed by (installed)
snapper-zypp-plugin-0.3.3-2.2.noarch

I dug around further and in the spec file of python-gobject [1] I found
%global __requires_exclude typelib\\(%%namespaces\\)
IMHO with this line the dependency on typelib should be stripped [2].
However, the dependency is still enforced an pulls all graphical stuff like
Mesa even on headless machines. 

So, is there a good reason why Mesa is needed by snapper even on a headless
machine, or is the purging of the typelib requirement not working properly?

Best regards

Thomas

[1]
https://build.opensuse.org/package/view_file/openSUSE:Leap:42.2/python-gobject/python-gobject.spec?expand=1
[2]
https://forums.opensuse.org/showthread.php/499028-RPM-What-does-quot-global-__requires_exclude-quot-do?p=2650314#post2650314