This is the source for a debugger used in Haskell plugin for IntelliJ IDEA.
HaskellDebugger accepts specific arguments:
-m<file>- load file as main module (required)-p<port>- connect debug output stream to localhost:port (if not set, debug output is set to stdout)-i<path>- add given path as a directory with source files-pkg<package>- load given package as a dependency
Commands are mostly the same as that which are used in ghci.
:?- show list of available commands:break <mod> <l>- set a breakpoint for module <mod> at the line <l>:breakindex <mod> <i>- set a breakpoint with index <i> for module <mod>:breaklist <mod>- show all available breakpoints (index and span) for module <mod>:breaklist <mod> <l>- show all breakpoints containing line <l> for module <mod>:continue- resume after a breakpoint:delete <mod> <ind>- delete the breakpoint with index <ind> from module <mod>:force <expr>- print <expr>, forcing unevaluated parts:history- after :trace, show the execution history:sprint <name>- prints a value without forcing its computation:step- single-step after stopping at a breakpoint:steplocal- single-step within the current top-level binding:trace <expr>- evaluate <expr> with tracing on (see :history):type <expr>- show the type of <expr>:eval <int> <expr>- evaluates <expr> ((<int> > 0) => forced evaluation):set <flag>- sets given flag, available flags:-fbreak-on-error-fbreak-on-exception
:unset <flag>- unsets given flag:breakinfo- pretty printing for current BreakInfo:q- exit debugger