Test2::Harness::Runner::DepTracer - Tool for tracing module dependencies as they are loaded.

       These can be specified at construction, and will be populated during use.

       $hashref = $dt->exclude
           A  hashref  of  files/modules  to  exclude  from dep tracking. By default "strict" and "warnings" are
           excluded.

       $hashref = $dt->dep_map
           Every file which is loaded while the tool is started will have an entry in this hash, each  value  is
           an array of all files which loaded the key file directly or indirectly.

       $hashref = $dt->loaded
           How many times each file was directly loaded.

       Chad Granum <exodist@cpan.org>

       $dt_or_undef = Test2::Harness::Runner::DepTracer->ACTIVE();
           Get the currently active DepTracer, if any.

       Copyright 2020 Chad Granum <exodist7@gmail.com>.

       This  program  is  free  software;  you can redistribute it and/or modify it under the same terms as Perl
       itself.

       See http://dev.perl.org/licenses/

perl v5.40.1                                       2025-05-23             Test2::Harness::Runner::DepTracer(3pm)

       This tool is used by Test2::Harness to build a graph of dependancies which can then be used to blacklist
       modified modules (and anything thatuses them) when they change under a preloaded runner.

       Chad Granum <exodist@cpan.org>

       $dt->start
           Start tracking modules which are loaded.

       $dt->stop
           Stop tracking moduels that are loaded.

       Test2::Harness::Runner::DepTracer - Tool for tracing module dependencies as they are loaded.

       The source code repository for Test2-Harness can be found at http://github.com/Test-More/Test2-Harness/.

           use Test2::Harness::Runner::DepTracer;

           my $dt = Test2::Harness::Runner::DepTracer->new();

           $dt->start();

           require Some::Thing;

           # You can always check for and retrieve an active DepTrace this way:
           my $dt_reference = Test2::Harness::Runner::DepTracer->ACTIVE;

           $dt->stop();

           my $dep_map = $dt->dep_map;

           my $loaded_by = $dep_map->{'Some/Thing.pm'};
           print "Some::Thing was directly or indirectly loaded by:\n" . join("\n" => @$loaded_by) . "\n";