#5941: Add compilation stage plugins -------------------------------------+------------------------------------- Reporter: tibbe | Owner: Type: feature | Status: infoneeded request | Milestone: 7.10.1 Priority: normal | Version: 7.4.1 Component: Compiler | Keywords: Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by rodlogic): Now, from a user of this feature (or such feature), I would like to be able to do the following. Assuming I have, for example, two modules: {{{#!hs module A where import B main = sayHello "Joe" }}} {{{#!hs module B where sayHello :: String -> IO () sayHello = putStrLn }}} I would like to create a plugin, here named {{{DependenciesPlugin}}}, that is invoked with: {{{#!sh ghc -fplugin=DependenciesPlugin --make A.hs }}} This plugin would be called once to initialize itself, which in this case means creating a {{{A.dot}}} file: {{{ graph ModuleADependencies { }}} And once to terminate itself so that the {{{A.dot}}} file can be closed: {{{ } }}} In between the initialization and termination, the plugin would be called for each module to process the TypecheckedModule and generate a subgraph and the function dependencies: {{{ subgraph ModuleA { ModuleA.main [label="main"] } ModuleA.main -> ModuleB.sayHello subgraph ModuleB { ModuleB.sayHello [label="sayHello"] } }}} And command line options could be provided to tailor the DOT file generation (just module dependencies, only function dependencies, both, only dependencies from a specific functions, etc). Another option is to also take into account the packages these modules come from. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/5941#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler