This phase sends information on classes' dependencies to sbt via callbacks.
This is used by sbt for incremental recompilation. Briefly, when a file
changes sbt will recompile it, if its API has changed (determined by what
ExtractAPI sent) then sbt will determine which reverse-dependencies
(determined by what
ExtractDependencies sent) of the API have to be
recompiled depending on what changed.
See the documentation of
http://www.scala-sbt.org/0.13/docs/Understanding-Recompilation.html for more
information on how sbt incremental compilation works.
The following flags affect this phase: -Yforce-sbt-phases -Ydump-sbt-inc
Output should be checkable by TreeChecker
A name given to the
Phase that can be used to debug the compiler. For
instance, it is possible to print trees after a given phase using:
$ ./bin/dotc -Xprint:<phaseNameHere> sourceFile.scala