MIME registration breaks readonly /usr/share

[Enrico Scholz <enrico scholz informatik tu-chemnitz de>]

Hello,

the current method to register MIME types (

| update-mime-database "/usr/share/mime"

in %post scriptlets) breaks[1] on setups where /usr/share is mounted
readonly. This bug seems to affect a lot of recent gnome packages so
that a general solution must be found.

The "right" thing would be probably to do the needed checks in the %post
scriptlets. But:

* rpm does not offer simple ways for this[2]
* every package whould need this check

Last point could be solved by a %__update_mime_database macro incorporating
the required tests and actions. But the first issue stays so that a quick
hack like checking for EROFS in 'update-mime-database' is perhaps the best
solution for now.



Enrico

Footnotes: 
[1]  https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=132847
[2]  https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=51193