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CPAN(1) 			 Perl Programmers Reference Guide			  CPAN(1)

NAME
       cpan - easily interact with CPAN from the command line

SYNOPSIS
	       # with arguments and no switches, installs specified modules
	       cpan module_name [ module_name ... ]

	       # with switches, installs modules with extra behavior
	       cpan [-cfgimt] module_name [ module_name ... ]

	       # with just the dot, install from the distribution in the
	       # current directory
	       cpan .

	       # without arguments, starts CPAN.pm shell
	       cpan

	       # dump the configuration
	       cpan -J

	       # load a different configuration to install Module::Foo
	       cpan -j some/other/file Module::Foo

	       # without arguments, but some switches
	       cpan [-ahrvACDlLO]

DESCRIPTION
       This script provides a command interface (not a shell) to CPAN. At the moment it uses
       CPAN.pm to do the work, but it is not a one-shot command runner for CPAN.pm.

   Options
       -a  Creates a CPAN.pm autobundle with CPAN::Shell->autobundle.

       -A module [ module ... ]
	   Shows the primary maintainers for the specified modules.

       -c module
	   Runs a `make clean` in the specified module's directories.

       -C module [ module ... ]
	   Show the Changes files for the specified modules

       -D module [ module ... ]
	   Show the module details. This prints one line for each out-of-date module (meaning,
	   modules locally installed but have newer versions on CPAN).	Each line has three
	   columns: module name, local version, and CPAN version.

       -f  Force the specified action, when it normally would have failed. Use this to install a
	   module even if its tests fail. When you use this option, -i is not optional for
	   installing a module when you need to force it:

		   % cpan -f -i Module::Foo

       -F  Turn off CPAN.pm's attempts to lock anything. You should be careful with this since
	   you might end up with multiple scripts trying to muck in the same directory. This
	   isn't so much of a concern if you're loading a special config with "-j", and that
	   config sets up its own work directories.

       -g module [ module ... ]
	   Downloads to the current directory the latest distribution of the module.

       -G module [ module ... ]
	   UNIMPLEMENTED

	   Download to the current directory the latest distribution of the modules, unpack each
	   distribution, and create a git repository for each distribution.

	   If you want this feature, check out Yanick Champoux's "Git::CPAN::Patch" distribution.

       -h  Print a help message and exit. When you specify "-h", it ignores all of the other
	   options and arguments.

       -i  Install the specified modules.

       -j Config.pm
	   Load the file that has the CPAN configuration data. This should have the same format
	   as the standard CPAN/Config.pm file, which defines $CPAN::Config as an anonymous hash.

       -J  Dump the configuration in the same format that CPAN.pm uses. This is useful for
	   checking the configuration as well as using the dump as a starting point for a new,
	   custom configuration.

       -L author [ author ... ]
	   List the modules by the specified authors.

       -m  Make the specified modules.

       -O  Show the out-of-date modules.

       -t  Run a `make test` on the specified modules.

       -r  Recompiles dynamically loaded modules with CPAN::Shell->recompile.

       -v  Print the script version and CPAN.pm version then exit.

   Examples
	       # print a help message
	       cpan -h

	       # print the version numbers
	       cpan -v

	       # create an autobundle
	       cpan -a

	       # recompile modules
	       cpan -r

	       # install modules ( sole -i is optional )
	       cpan -i Netscape::Booksmarks Business::ISBN

	       # force install modules ( must use -i )
	       cpan -fi CGI::Minimal URI

EXIT VALUES
       The script exits with zero if it thinks that everything worked, or a positive number if it
       thinks that something failed. Note, however, that in some cases it has to divine a failure
       by the output of things it does not control. For now, the exit codes are vague:

	       1       An unknown error

	       2       The was an external problem

	       4       There was an internal problem with the script

	       8       A module failed to install

TO DO
       * one shot configuration values from the command line

BUGS
       * none noted

SEE ALSO
       Most behaviour, including environment variables and configuration, comes directly from
       CPAN.pm.

SOURCE AVAILABILITY
       This code is in Github:

	       git://github.com/briandfoy/cpan_script.git

CREDITS
       Japheth Cleaver added the bits to allow a forced install (-f).

       Jim Brandt suggest and provided the initial implementation for the up-to-date and Changes
       features.

       Adam Kennedy pointed out that exit() causes problems on Windows where this script ends up
       with a .bat extension

AUTHOR
       brian d foy, "<bdfoy@cpan.org>"

COPYRIGHT
       Copyright (c) 2001-2009, brian d foy, All Rights Reserved.

       You may redistribute this under the same terms as Perl itself.

perl v5.16.3				    2014-06-17					  CPAN(1)
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