NAME DB::Pluggable - Add plugin support for the Perl debugger SYNOPSIS $ cat ~/.perldb use DB::Pluggable; use YAML; $DB::PluginHandler = DB::Pluggable->new(config => Load <run; $ perl -d foo.pl DESCRIPTION This class adds plugin support to the Perl debugger. It is based on Hook::Modular, so see its documentation for details. You need to have a "~/.perldb" file (see perldebug for details) that invokes the plugin mechanism. The one in the synopsis will do, and there is a more commented one in this distribution's "etc/perldb" file. Plugins should live in the "DB::Pluggable::" namespace, like DB::Pluggable::BreakOnTestNumber does. HOOKS This class is very much in beta, so it's more like a proof of concept. Therefore, not all hooks imaginable have been added, only the ones to make this demo work. If you want more hooks or if the current hooks don't work for you, let me know. The following hooks exist: "plugin.init" Called at the beginning of the "run()" method. The hook doesn't get any arguments. "db.watchfunction" Called from within "DB::watchfunction()". If you want the debugger to call the function, you need to enable it by calling "enable_watchfunction()" somewhere within your plugin. It's a good idea to enable it as late as possible because it is being called very often. See the DB::Pluggable::BreakOnTestNumber source code for an example. The hook doesn't get any arguments. "db.cmd.b" Called when the "b" debugger command (used to set breakpoints) is invoked. See "run()" below for what the hook should return. The hook passes these named arguments: "cmd" This is the first argument passed to "DB::cmd_b()". "line" This is the second argument passed to "DB::cmd_b()". This is the most important argument as it contains the command line. See the DB::Pluggable::BreakOnTestNumber source code for an example. "dbline" This is the third argument passed to "DB::cmd_b()". METHODS "enable_watchfunction" Tells the debugger to call "DB::watchfunction()", which in turn calls the "db.watchfunction" hook on all plugins that have registered it. "run" First it calls the "plugin.init" hook, then it enables hooks for the relevant debugger commands (see above for which hooks are available). Each command-related hook should return the appropriate constant from DB::Pluggable::Constants - either "HANDLED" if the hook has handled the command, or "DECLINED" if it didn't. If no hook has "HANDLED" the command, the default command subroutine (e.g., "DB::cmd_b()") from "perl5db.pl" will be called. BUGS AND LIMITATIONS No bugs have been reported. Please report any bugs or feature requests through the web interface at . INSTALLATION See perlmodinstall for information and options on installing Perl modules. AVAILABILITY The latest version of this module is available from the Comprehensive Perl Archive Network (CPAN). Visit to find a CPAN site near you. Or see . The development version lives at . Instead of sending patches, please fork this project using the standard git and github infrastructure. AUTHORS Marcel Grünauer, "" COPYRIGHT AND LICENSE Copyright 2008-2009 by Marcel Grünauer. This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.