1 files changed, 122 insertions, 0 deletions
diff --git a/lib/Log/Log4perl/InternalDebug.pm b/lib/Log/Log4perl/InternalDebug.pm
new file mode 100644
index 0000000..2cee7d0
--- /dev/null
+++ b/lib/Log/Log4perl/InternalDebug.pm
@@ -0,0 +1,122 @@
+package Log::Log4perl::InternalDebug;
+use warnings;
+use strict;
+
+use File::Temp qw(tempfile);
+use File::Spec;
+
+require Log::Log4perl::Resurrector;
+
+###########################################
+sub enable {
+###########################################
+    unshift @INC, \&internal_debug_loader;
+}
+
+##################################################
+sub internal_debug_fh {
+##################################################
+    my($file) = @_;
+
+    local($/) = undef;
+    open FILE, "<$file" or die "Cannot open $file";
+    my $text = <FILE>;
+    close FILE;
+
+    my($tmp_fh, $tmpfile) = tempfile( UNLINK => 1 );
+
+    $text =~ s/_INTERNAL_DEBUG(?!\s*=>)/1/g;
+
+    print $tmp_fh $text;
+    seek $tmp_fh, 0, 0;
+
+    return $tmp_fh;
+}
+
+###########################################
+sub internal_debug_loader {
+###########################################
+    my ($code, $module) = @_;
+
+      # Skip non-Log4perl modules
+    if($module !~ m#^Log/Log4perl#) {
+        return undef;
+    }
+
+    my $path = $module;
+    if(!-f $path) {
+        $path = Log::Log4perl::Resurrector::pm_search( $module );
+    }
+
+    my $fh = internal_debug_fh($path);
+
+    my $abs_path = File::Spec->rel2abs( $path );
+    $INC{$module} = $abs_path;
+
+    return $fh;
+}
+
+###########################################
+sub resurrector_init {
+###########################################
+    unshift @INC, \&resurrector_loader;
+}
+
+###########################################
+sub import {
+###########################################
+    # enable it on import
+  enable();
+}
+
+1;
+
+__END__
+
+=encoding utf8
+
+=head1 NAME
+
+Log::Log4perl::InternalDebug - Dark Magic to enable _INTERNAL_DEBUG
+
+=head1 DESCRIPTION
+
+When called with
+
+    perl -MLog::Log4perl::InternalDebug t/001Test.t
+
+scripts will run with _INTERNAL_DEBUG set to a true value and hence
+print internal Log4perl debugging information.
+
+=head1 LICENSE
+
+Copyright 2002-2013 by Mike Schilli E<lt>m@perlmeister.comE<gt> 
+and Kevin Goess E<lt>cpan@goess.orgE<gt>.
+
+This library is free software; you can redistribute it and/or modify
+it under the same terms as Perl itself. 
+
+=head1 AUTHOR
+
+Please contribute patches to the project on Github:
+
+    http://github.com/mschilli/log4perl
+
+Send bug reports or requests for enhancements to the authors via our
+
+MAILING LIST (questions, bug reports, suggestions/patches): 
+log4perl-devel@lists.sourceforge.net
+
+Authors (please contact them via the list above, not directly):
+Mike Schilli <m@perlmeister.com>,
+Kevin Goess <cpan@goess.org>
+
+Contributors (in alphabetical order):
+Ateeq Altaf, Cory Bennett, Jens Berthold, Jeremy Bopp, Hutton
+Davidson, Chris R. Donnelly, Matisse Enzer, Hugh Esco, Anthony
+Foiani, James FitzGibbon, Carl Franks, Dennis Gregorovic, Andy
+Grundman, Paul Harrington, Alexander Hartmaier  David Hull, 
+Robert Jacobson, Jason Kohles, Jeff Macdonald, Markus Peter, 
+Brett Rann, Peter Rabbitson, Erik Selberg, Aaron Straup Cope, 
+Lars Thegler, David Viner, Mac Yang.
+