[Rpm-maint] Problems with %Requires(preun):
scottb at xandros.com
Tue Dec 11 19:01:02 UTC 2007
> afaik rpm does not order package removal :-(
Interesting. The section on context marked dependencies in the
snapshot version of Maximum RPM suggests it should. See
Context Marked Dependencies
Recent versions of RPM support context marked dependencies. This is a
special type of a dependency that applies only in a specified context.
Using this feature, one can specify dependencies for pre- and
post(un)install scriptlets, ie. the context of a dependency is the
execution time of the specified scriptlet.
The syntax for specifying these dependencies is:
Here, X can be one of pre, post, preun, or postun, which tells RPM that
the package depends on package foo for running the corresponding %pre,
%post, %preun, or %postun script.
In practice, RPM enforces the above dependencies until the specified
script has been run, not at that time. In other words, it will allow
erasing a dependency that was marked for eg. the %post script for an
already installed package, but will not allow erasing one that is
required for a %postun script for such a package. This is to reduce
confusion; it would be somewhat odd if RPM told one to install a package
in order to get another one erased.
Is their a disconnect between the documentation and the code, or how are
context marked dependencies supposed to work (if at all).
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