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 [-cfgimtTw] 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. -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. -I Load "local::lib" (think like "-I" for loading lib paths). -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 List all installed modules with their versions -L author [ author ... ] List the modules by the specified authors. -m Make the specified modules. -O Show the out-of-date modules. -p Ping the configured mirrors -P Find the best mirrors you could be using (but doesn't configure them just yet) -r Recompiles dynamically loaded modules with CPAN::Shell->recompile. -t Run a `make test` on the specified modules. -T Do not test modules. Simply install them. -u Upgrade all installed modules. Blindly doing this can really break things, so keep a backup. -v Print the script version and CPAN.pm version then exit. -V Print detailed information about the cpan client. -w UNIMPLEMENTED Turn on cpan warnings. This checks various things, like directory permissions, and tells you about problems you might have. 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 ENVIRONMENT VARIABLES CPAN_OPTS "cpan" splits this variable on whitespace and prepends that list to @ARGV before it processes the command-line arguments. For instance, if you always want to use "local:lib", you can set "CPAN_OPTS" to "-I". 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, "<firstname.lastname@example.org>" COPYRIGHT Copyright (c) 2001-2013, brian d foy, All Rights Reserved. You may redistribute this under the same terms as Perl itself. perl v5.20.2 2018-11-30 CPAN(1)
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