NAME

       perl-depends - Roughly find out module dependencies from Perl file(s)

SYNOPSIS

         perl-depends [options] FILE [FILE ...]

DESCRIPTION

       Find out roughly the modules the program uses. This is based on the idea that Perl
       evaluates the "use" commands at compile time and stores the loaded module information in
       the %INC variable. By examining the loaded modules and comparing them against the standard
       Perl modules, the external module dependencies can be roughly dependencies.

       The dependency information can be used to determine what external modules have to be
       installed before the program can be used.

       The target FILE has to be instrumented (a comouting term to inject code) with the
       dependency checking code. The resulting script is then stored in a temporary file which
       the user runs.

       This program does not run the instrumented files because it cannot know what possible
       options need to be passed for programs to trigger null behavior. That is, something that
       doesn't actually involve executing the script for real. Such options might include
       --version, --dry-run, or options like --generate-syntax-error-now, or invalid arguments to
       make the program stop with an error. The user is more likely to know the best way of
       running the instrumented files.

       An example of output: the external module dependency here is 'Regexp::Common' and the rest
       of them can be ignored.

           Regexp::Common                 Regexp/Common.pm
           Regexp::Common::CC             Regexp/Common/CC.pm
           ...

OPTIONS

       -e, --extension=EXT
           Use extension EXT for instrumented files. The default is ".tmp".

       -h, --help
           Print text help

       --help-html
           Print help in HTML format.

       --help-man
           Print help in manual page man(1) format.

       -v, --verbose [LEVEL]
           Print informational messages. Increase numeric LEVEL for more verbosity.

       -V, --version
           Print contact and version information.

EXAMPLES

       Instrument a file, run it to see the results and delete instrumentated script:

           perl-depends file.pl
           perl file.pl.tmp <followed by whatever args the program needs>
           rm *.tmp

TROUBLESHOOTING

       None.

ENVIRONMENT

       None.

FILES

       None.

EXIT STATUS

       This program's exit status is not defined.

       The instrumented program's exit status is 1 if external modules are displayed and 0 if no
       external modules are found.

DEPENDENCIES

       Uses standard Perl modules.

BUGS AND LIMITATIONS

       If the target program's code conditionally loads mor perl modules during execution, you
       must run the program for real to have those modules detected.

SEE ALSO

       cpan(1)

AVAILABILITY

       https://github.com/jaalto/project--perl-depends

AUTHOR

       Jari Aalto <jari.aalto@cante.net>

LICENSE

       Copyright (C) 2009-2016 Jari Aalto <jari.aalto@cante.net>

       This program is free software; you can redistribute and/or modify program under the terms
       of GNU General Public license either version 2 of the License, or (at your option) any
       later version. See <http://www.gnu.org/licenses/>.