Shovel: introduce operating modes #14425
Merged
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Sometimes you want a plugin to act as a library
and not an application. That is, for its modules
to be available at compile time and on a running
node but, say, the actual runtime parameter
handling and supervision of shovels to be
handled by another plugin.
Since we do not currently have a concept of
"library plugins" or "library dependencies",
this approach demonstrates one example of how
some plugins can be used effectively as libraries.
Per discussion with @mkuratczyk @Zerpet.