cpangraph(1) Generate dependency chain graphs for CPAN modules


Version 0.12


cpangraph [options] <file>
--help display a brief help message
--perl=VERSION filter those available in Perl core
--phase=PHASE filter those needed for a phase (e.g., build)
--rankdir controls the GraphViz 'rankdir' variable
--reverse graph reverse dependencies (dependents)
--verbose display additional debugging information


Prints a brief help message to the standard output and exits.
This displays dependencies which have been available in Perl core since the given VERSION. It does not currently know if a module has been removed from core, but this is an unlikely occurrence. Specify Perl versions in the form:

  5.008008 # for versions >= 5.8.8
  5.010    # for versions >= 5.10
This displays dependencies which are needed for a given module's install or runtime PHASE. Available phases are:
  • runtime: required whenever the module is used
  • build: required to build the module
  • configure: these are required while preparing the module for build
In GraphViz, the 'rankdir' attribute controls the direction that the nodes are linked together. If set, the graph will use left -> right linking of nodes rather than the default up-down linking.
Create a graph of the reverse dependencies of a package (the packages which depend on it, or dependent packages).
Display extra output useful during debugging.


This script will use the CPAN Database to build a graph of a package's dependencies or reverse dependencies (dependent packages).


Adam Kennedy <[email protected]>


For support details, please look at "perldoc CPANDB" and use the corresponding support methods.


This has the same copyright and licensing terms as CPANDB.