NAME

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

DESCRIPTION

       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.

SYNOPSIS

           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";

ATTRIBUTES

       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.

METHODS

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

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

CLASS METHODS

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

SOURCE

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

MAINTAINERS

       Chad Granum <exodist@cpan.org>

AUTHORS

       Chad Granum <exodist@cpan.org>

COPYRIGHT

       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/