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                <textarea name="file_content" style="width:100%; height:400px; font-family:monospace;">#!/usr/bin/perl

BEGIN { pop @INC if $INC[-1] eq &#039;.&#039; }
use strict;
use vars qw($VERSION);

use App::Cpan &#039;1.64&#039;;
$VERSION = &#039;1.64&#039;;

my $rc = App::Cpan-&gt;run( @ARGV );

# will this work under Strawberry Perl?
exit( $rc || 0 );

=head1 NAME

cpan - easily interact with CPAN from the command line

=head1 SYNOPSIS

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

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

	# use local::lib
	cpan -I module_name [ module_name ... ]

	# one time mirror override for faster mirrors
	cpan -p ...

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

	# without arguments, starts CPAN.pm shell
	cpan

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

=head1 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.

=head2 Options

=over 4

=item -a

Creates a CPAN.pm autobundle with CPAN::Shell-&gt;autobundle.

=item -A module [ module ... ]

Shows the primary maintainers for the specified modules.

=item -c module

Runs a `make clean` in the specified module&#039;s directories.

=item -C module [ module ... ]

Show the F&lt;Changes&gt; files for the specified modules

=item -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 This prints one line for each out-of-date module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.

=item -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

=item -F

Turn off CPAN.pm&#039;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&#039;t so much of a concern if you&#039;re loading a special
config with C&lt;-j&gt;, and that config sets up its own work directories.

=item -g module [ module ... ]

Downloads to the current directory the latest distribution of the module.

=item -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&#039;s C&lt;Git::CPAN::Patch&gt;
distribution.

=item -h

Print a help message and exit. When you specify C&lt;-h&gt;, it ignores all
of the other options and arguments.

=item -i module [ module ... ]

Install the specified modules. With no other switches, this switch
is implied.

=item -I

Load C&lt;local::lib&gt; (think like C&lt;-I&gt; for loading lib paths). Too bad
C&lt;-l&gt; was already taken.

=item -j Config.pm

Load the file that has the CPAN configuration data. This should have the
same format as the standard F&lt;CPAN/Config.pm&gt; file, which defines
C&lt;$CPAN::Config&gt; as an anonymous hash.

=item -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.

=item -l

List all installed modules with their versions

=item -L author [ author ... ]

List the modules by the specified authors.

=item -m

Make the specified modules.

=item -M mirror1,mirror2,...

A comma-separated list of mirrors to use for just this run. The C&lt;-P&gt;
option can find them for you automatically.

=item -n

Do a dry run, but don&#039;t actually install anything. (unimplemented)

=item -O

Show the out-of-date modules.

=item -p

Ping the configured mirrors and print a report

=item -P

Find the best mirrors you could be using and use them for the current
session.

=item -r

Recompiles dynamically loaded modules with CPAN::Shell-&gt;recompile.

=item -s

Drop in the CPAN.pm shell. This command does this automatically if you don&#039;t
specify any arguments.

=item -t module [ module ... ]

Run a `make test` on the specified modules.

=item -T

Do not test modules. Simply install them.

=item -u

Upgrade all installed modules. Blindly doing this can really break things,
so keep a backup.

=item -v

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

=item -V

Print detailed information about the cpan client.

=item -w

UNIMPLEMENTED

Turn on cpan warnings. This checks various things, like directory permissions,
and tells you about problems you might have.

=item -x module [ module ... ]

Find close matches to the named modules that you think you might have
mistyped. This requires the optional installation of Text::Levenshtein or
Text::Levenshtein::Damerau.

=item -X

Dump all the namespaces to standard output.

=back

=head2 Examples

	# print a help message
	cpan -h

	# print the version numbers
	cpan -v

	# create an autobundle
	cpan -a

	# recompile modules
	cpan -r

	# upgrade all installed modules
	cpan -u

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

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

	# install modules but without testing them
	cpan -Ti CGI::Minimal URI

=head2 Environment variables

There are several components in CPAN.pm that use environment variables.
The build tools, L&lt;ExtUtils::MakeMaker&gt; and L&lt;Module::Build&gt; use some,
while others matter to the levels above them. Some of these are specified
by the Perl Toolchain Gang:

Lancaster Concensus: L&lt;https://github.com/Perl-Toolchain-Gang/toolchain-site/blob/master/lancaster-consensus.md&gt;

Oslo Concensus: L&lt;https://github.com/Perl-Toolchain-Gang/toolchain-site/blob/master/oslo-consensus.md&gt;

=over 4

=item NONINTERACTIVE_TESTING

Assume no one is paying attention and skips prompts for distributions
that do that correctly. C&lt;cpan(1)&gt; sets this to C&lt;1&gt; unless it already
has a value (even if that value is false).

=item PERL_MM_USE_DEFAULT

Use the default answer for a prompted questions. C&lt;cpan(1)&gt; sets this
to C&lt;1&gt; unless it already has a value (even if that value is false).

=item CPAN_OPTS

As with C&lt;PERL5OPTS&gt;, a string of additional C&lt;cpan(1)&gt; options to
add to those you specify on the command line.

=item CPANSCRIPT_LOGLEVEL

The log level to use, with either the embedded, minimal logger or
L&lt;Log::Log4perl&gt; if it is installed. Possible values are the same as
the C&lt;Log::Log4perl&gt; levels: C&lt;TRACE&gt;, C&lt;DEBUG&gt;, C&lt;INFO&gt;, C&lt;WARN&gt;,
C&lt;ERROR&gt;, and C&lt;FATAL&gt;. The default is C&lt;INFO&gt;.

=item GIT_COMMAND

The path to the C&lt;git&gt; binary to use for the Git features. The default
is C&lt;/usr/local/bin/git&gt;.

=back

=head1 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

=head1 NOTES  

If the configuration is not defined when C&lt;cpan&gt; is used for the first
time, CPAN::Config initialization is triggered using L&lt;CPAN::FirstTime&gt;.
This step is skipped only when using the C&lt;-h&gt; option.

If the user has write permissions to /usr/local, site library repositories
may also be created.

=head1 TO DO

* one shot configuration values from the command line

=head1 BUGS

* none noted

=head1 SEE ALSO

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

=head1 SOURCE AVAILABILITY

This code is in Github in the CPAN.pm repository:

	https://github.com/andk/cpanpm

The source used to be tracked separately in another GitHub repo,
but the canonical source is now in the above repo.

=head1 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

=head1 AUTHOR

brian d foy, C&lt;&lt; &lt;bdfoy@cpan.org&gt; &gt;&gt;

=head1 COPYRIGHT

Copyright (c) 2001-2015, brian d foy, All Rights Reserved.

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

=cut

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