Uberjar does not merge files (except for data_readers.clj)

[hlship]

Expected Behavior

When multiple libraries contain the same file, they should be merged together. Specifically, .edn files should be deep-merged together.

Actual Behavior

Last file read overwrites earlier file written.

[puredanger]

Seems like a surprising expectation to me. Really, there are a range of behaviors you might want (log4j config files are notoriously weird for example). tools.build abstracts this into an api and provides a variety of available handlers.

[hlship]

The solution is flexible in how such a merge occurs.

[hlship]

#29