Question

Note not “functional dependency”. Are there tools available that allow me to build a static function dependency graph from source code? Something which indicates to me which functions depend on which other ones in a graphical manner.

Answer 1

Yes, there certainly are. If you look in the Development category on Hackage, you’ll find tools for:

• graphing package dependencies — n.b requres older cabal
• graphing module dependencies
• graphing function calls
• graphing running data structures

In particular, SourceGraph contains many analysis passes, including:

• visualizing function calls
• computing cyclomatic complexity
• visualizing module imports

Other tools that you might be interested in are:

• HPC, for visualizing test coverage
• ThreadScope, for visualizing runtime behavior
• lscabal, extract modules from a package

Here is the functional call graph produced by SourceGraph run over cabal2arch: