This dependency pulls in a number of other dependencies which we don't
use but which are difficult for downstream packagers to deal with.
Include our own version of map-vals (because seriously, why is this
not already part of Clojure) and update-first (because re-forming
those problems without it crazy convoluted). But our implementation is
a fair bit shorter because it doesn't have to handle all the edge
cases.
This eliminates the need to exclude dynapath, since pomegranate and
bultitude now use the same version. This also updates core's pom.xml
with other recent version updates.
This fixes the issue causing the build failures. The root of it is
that dynapath was allowing pomegranate to modify the boot classloader,
which caused multiple copies of the same class to be loaded.
The dependencies for pomegranate were cleaned up as of pomegranate-0.0.8. We no longer need to exclude slf4j. (Hard to claim this is important; I just happened to notice that it was not needed.)
This allows for other directories to be used for the automatic
repository tagging. This is useful for repositories that contain
multiple projects, such as leiningen-core and leiningen, so that both
will have the correct repository tag information in their pom.xml.
This is accomplished with the :reduce metadata, which specifies the
reduce function to use when merging. This allows us to merge
dependencies and repositories deeply like other structures. Note that
dependencies are transformed into a map before they are merged and then
transformed back into a vector.
Also change the way that collections are merged. They used to be merged
by taking the right collection and prepending it to the left collection.
This behavior was needed for :*-paths in defproject, but it is not an
obvious default. Now, the default is to append the right collection, but
the :prepend metadata can be used to tell meta-merge to prepend instead.
By default, :source-paths, :resource-paths and :test-paths have :prepend
set to true.
