The Deps Plugin

The Deps Plugin allows you to make a series of assertions like "Package X requires Package Y (and optionally also Package Z etc.) Note that only configuration entries, like Package, ConfigFile, etc can be used. Groupings (like Bundle) are not supported.

Here are some examples:

Deps/bcfg2.xml

<Dependencies priority='0'>
    <Package name='bcfg2'>
        <Package name='python-lxml'/>
        <Package name='isprelink'/>
    </Package>
</Dependencies>

This basically causes any configuration specification that includes Package bcfg2 to include python-lxml and isprelink, in a second base clause.

Deps/bcfg2-server.xml

<Dependencies priority='0'>
    <Package name='bcfg2-server'>
        <Package name='python-cheetah'/>
        <Package name='gamin-python'/>
        <Package name='sqlite'/>
        <Package name='python-sqlite'/>
        <Package name='Django'/>
        <Package name='mod_python'/>
        <Package name='graphviz'/>
        <Package name='xorg-x11-font-utils'/>
        <Package name='chkfontpath'/>
        <Package name='ttmkfdir'/>
        <Package name='xorg-x11-xfs'/>
        <Package name='urw-fonts'/>
    </Package>
</Dependencies>

This states that the bcfg2-server package (it's a separate package on some distros) depends on a long list of other packages.