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[](https://travis-ci.org/rocky/Perl-Devel-Trepan) [](https://repology.org/project/perl:devel-trepan/versions) Devel::Trepan — A gdb-like Perl debugger ==================================== A modular, testable gdb-like debugger in the family of the "Trepanning" debuggers ([trepan3k](https://pypi.org/project/trepan3k/), [trepan-ni](https://www.npmjs.com/package/trepan-ni), [bashdb](http://bashdb.sourceforge.net), [zshdb](https://github.com/rocky/zshdb)). The command set is modeled off of _gdb_, but other command sets are possible. Features: * precise location via decomplation (via plugin [Trepan::Devel::Deparse](https://github.com/rocky/p5-Devel-Trepan-Deparse/) * has extensive online-help, * syntax highlighting of Perl code * context-sensitive command completion * out-of-process and remote debugging * interactive shell support * code disassembly * _gdb_ syntax * easy extensibility at several levels * command aliases * a user-supplied command directory * Perl Plugin module such as [Trepan::Devel::Disassemble](https://github.com/rocky/Perl-Devel-Trepan-Disassemble) * is more modular * comes with extensive tests * is not as ugly as _perl5db_ Synopsis -------- From a shell: $ trepan.pl [trepan-opts] [--] perl-program [perl-program-opts] Or for those who prefer the traditional Perlish way: $ perl -d:Trepan perl-program [perl-program-opts] The problem with the above "perlish" approach is that there are a number of default options won't get set intelligently. If that matters, you'll have to set them either with a debugger command or via environment variable *TREPANPL_OPTS*. To see the environement variables, run *trepan.pl* with the `--verbose` option. Calling the debugger from inside your Perl program using Joshua ben Jore's [Enbugger](http://search.cpan.org/~jjore/Enbugger/): # This needs to be done once and could even be in some sort of # conditional code require Enbugger; Enbugger->load_debugger( 'trepan' ); # Alternatively, to unconditionally load Enbugger and trepan: use Enbugger 'trepan'; # work, work, work... # Oops! there was an error! Enable the debugger now! Enbugger->stop; # or Enbugger->stop if ... Or if you just want POSIX-shell-like `set -x` line tracing: $ trepan.pl -x -- perl-program [perl-program-opts] Inside the debugger tracing is turned on using the command `set trace print`. There is extensive help from the `help` command. Installation ------------ To install this Devel::Trepan from source code: $ cpan Module::Build $ perl Build.PL $ ./Build installdeps $ make $ make test $ make install # May need sudo or to install from CPAN: $ cpanm Devel::Trepan See Also -------- * [On writing a new Perl Debugger (Part 1 - Why?)](http://blogs.perl.org/users/rockyb/2012/07/on-writing-a-new-perl-debugger-part-1---why.html) * [Devel::Trepan Debugger command aliases and command completion](http://blogs.perl.org/users/rockyb/2012/08/develtrepan-debugger-command-aliases-and-command-completion.html) * [Devel::Trepan Debugger evaluation of Perl statements](http://blogs.perl.org/users/rockyb/2012/08/develtrepan-debugger-evaluation-of-perl-statements.html) * [Location, Location, Location](http://blogs.perl.org/users/rockyb/2012/08/location-location-location.html) * [Exact Perl location with B::DeparseTree (and Devel::Callsite)](http://blogs.perl.org/users/rockyb/2015/11/exact-perl-location-with-bdeparse-and-develcallsite.html) * [wiki](https://github.com/rocky/Perl-Devel-Trepan/wiki) Licence and Copyright --------------------- Copyright (C) 2011-2015, 2019 Rocky Bernstein This program is distributed WITHOUT ANY WARRANTY, including but not limited to the implied warranties of merchantability or fitness for a particular purpose. The program is free software. You may distribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation (either version 2 or any later version) and the Perl Artistic License as published by O’Reilly Media, Inc. Please open the files named gpl-2.0.txt and Artistic for a copy of these licenses.

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