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use strict;
use App::perlbrew;
my $app = App::perlbrew->new(@ARGV);
=head1 NAME
perlbrew - Perl environment manager.
perlbrew command syntax:
perlbrew <command> [options] [arguments]
init Initialize perlbrew environment.
install Install perl
uninstall Uninstall the given installation
available List perls available to install
lib Manage local::lib directories.
alias Give perl installations a new name
upgrade-perl Upgrade the current perl
list List perl installations
use Use the specified perl in current shell
off Turn off perlbrew in current shell
switch Permanently use the specified perl as default
switch-off Permanently turn off perlbrew (revert to system perl)
exec exec programs with specified perl enviroments.
self-install Install perlbrew itself under PERLBREW_ROOT/bin
self-upgrade Upgrade perlbrew itself.
install-patchperl Install patchperl
install-cpanm Install cpanm, a friendly companion.
install-ack Install ack
download Download the specified perl distribution tarball.
mirror Pick a preferred mirror site
version Display version
help Read more detailed instructions
Generic command options:
-q --quiet Be quiet on informative output message.
-v --verbose Tell me more about it.
See `perlbrew help` for the full documentation of perlbrew, or
See `perlbrew help <command>` for detail description of the command.
=over 4
By default, perlbrew builds and installs perls into
C<$ENV{HOME}/perl5/perlbrew> directory. To use a different directory,
set this environment variable in your C<bashrc> to the directory
in your shell RC before sourcing perlbrew's RC.
It is possible to share one perlbrew root with multiple user account
on the same machine. Therefore people do not have to install the same
version of perl over an over. Let's say C</opt/perl5> is the directory
we want to share. All users should be able append this snippet to their
bashrc to make it effective:
export PERLBREW_ROOT=/opt/perl5
source ${PERLBREW_ROOT}/etc/bashrc
After doing so, everone's PATH should include C</opt/perl5/bin> and
C</opt/perl5/perls/${PERLBREW_PERL}/bin>. Each user can invoke C<perlbrew
switch> and C<perlbrew use> to independently switch to different perl
environment of their choice. However, only the user with write permission to
C<$PERLBREW_ROOT> may install CPAN modules. This is both good and bad depending
on the working convention of your team.
If you wish to install CPAN modules only for yourself, you should use the C<lib>
command to construct a personal local::lib environment. local::lib environments
are personal, and are not shared between different users. For more detail, read
C<perlbrew help lib> and the documentation of L<local::lib>.
If you want even a cooler module isolation and wish to install CPAN modules used
for just one project, you should use L<carton> for this purpose.
It is also possible to set this variable before installing perlbrew
to make perlbrew install itself under the given PERLBREW_ROOT:
export PERLBREW_ROOT=/opt/perl5
curl -kL | bash
After doing this, the perlbrew executable is installed as C</opt/perl5/bin/perlbrew>
By default, perlbrew stores per-user setting to C<$ENV{HOME}/.perlbrew>
directory. To use a different directory, set this environment variable
in your shell RC before sourcing perlbrew's RC.
In some cases, say, your home directory is on NFS and shared across multiple
machines, you may wish to have several different perlbrew setting
per-machine. To do so, you can use the C<PERLBREW_HOME> environment variable to
tell perlbrew where to look for the initialization file. Here's a brief bash
snippet for the given senario.
if [ "$(hostname)" == "machine-a" ]; then
export PERLBREW_HOME=~/.perlbrew-a
elif [ "$(hostname)" == "machine-b" ]; then
export PERLBREW_HOME=~/.perlbrew-b
source ~/perl5/perlbrew/etc/bashrc
This environment variable specify the list of command like flags to pass through
to 'sh Configure'. By default it is '-de'.
The CPAN mirror url of your choice.
Usage: perlbrew init
The C<init> command should be manually invoked whenever you (the perlbrew user)
upgrade or reinstall perlbrew.
If the upgrade is done with C<self-upgrade> command, or by running the
one-line installer manually, this command is invoked automatically.
Usage: perlbrew info
The `info` command dumps a page of handful information for the perlbrew
=over 4
=item B<install> [options] perl-<version>
=item B<install> [options] <version>
Build and install the given version of perl.
Version numbers usually look like "5.x.xx", or
"perl-5.xx.x-RCx" for release candidates.
The specified perl is downloaded from the offical CPAN website or from the
mirror site configured before.
To configure mirror site, invoke `mirror` command.
=item B<install> [options] perl-stable
=item B<install> [options] stable
A convenient way to install the most recent stable version of Perl, of those
that are available.
=item B<install> [options] perl-blead
=item B<install> [options] blead
A special way to install the blead version of perl, which is downloaded from
this specific URL regardless of mirror settings:
=item B<install> [options] /path/to/perl/git/checkout/dir
Build and install from the given git checkout dir.
=item B<install> [options] /path/to/perl-5.14.0.tar.gz
Build and install from the given archive file.
=item B<install> [options]
Build and install from the given URL. Supported URL schemes are C<http://>,
C<https://>, C<ftp://> and C<file://>.
Options for C<install> command:
-f --force Force installation
-j $n Parallel building and testing. ex. C<perlbrew install -j 5 perl-5.14.2>
-n --notest Skip testing
--switch Automatically switch to this Perl once successfully
installed, as if with `perlbrew switch <version>`
--as Install the given version of perl by a name.
ex. C<perlbrew install perl-5.6.2 --as legacy-perl>
-D,-U,-A Switches passed to perl Configure script.
ex. C<perlbrew install perl-5.10.1 -D usemymalloc -U uselargefiles>
--sitecustomize $filename
Specify a file to be installed as
By default, all installations are configured after their name like this:
sh Configure -de -Dprefix=$PERLBREW_ROOT/perls/<name>
Usage: perlbrew uninstall <name>
Uninstalls the given perl installation. The name is the installation name as in
the output of `perlbrew list`
Usage: perlbrew B<use> [perl-<version> | <version> | <name>]
Use the given version perl in current shell. This will not effect newly opened
Without a parameter, shows the version of perl currently in use.
Usage: perlbrew switch [ <name> ]
Switch to the given version, and makes it the default for this and all
future terminal sessions.
Without a parameter, shows the version of perl currently selected.
Usage: perlbrew list
List the installed versions of perl.
Usage: perlbrew available
List the recently available versions of perl on CPAN.
The list is retrieved from the web page L<>,
and is not the list of *all* perl versions ever released in the past.
NOTICE: This command might be gone in the future and becomes an option of 'list' command.
Usage: perlbrew off
Temporarily disable perlbrew in the current shell. Effectively re-enables the
default system Perl, whatever that is.
This command works only if you add the statement of `source $PERLBREW_ROOT/etc/bashrc`
in your shell initialization (bashrc / zshrc).
Usage: perlbrew switch-off
Permananently disable perlbrew. Use C<switch> command to re-enable it. Invoke
C<use> command to enable it only in the current shell.
Re-enables the default system Perl, whatever that is.
Usage: perlbrew alias [-f] create <name> <alias>
Create an alias for the installation named <name>.
Usage: perlbrew alias [-f] rename <old_alias> <new_alias>
Rename the alias to a new name.
Usage: perlbrew alias delete <alias>
Delete the given alias.
Usage: perlbrew mirror
Run this if you want to choose a specific CPAN mirror to install the
perls from. It will display a list of mirrors for you to pick
from. Hit 'q' to cancel the selection.
Usage: perlbrew exec [--with perl-name[,perl-name...]] <command> <args...>
Execute command for each perl installations, one by one.
For example, run a Hello program:
perlbrew exec perl -e 'print "Hello from $]\n"'
The output looks like this:
Hello word from perl-5.012002
Hello word from perl-5.013010
Hello word from perl-5.014000
Notice that the command is not executed in parallel.
When C<--with> arugemnt is provided, the command will be only executed with the
specified perl installations. The following command install Moose module into
perl-5.12, regardless the current perl:
perlbrew exec --with perl-5.12 cpanm Moose
Multiple installation names can be provided:
perlbrew exec --with perl-5.12,perl-5.12-debug,perl-5.14.2 cpanm Moo
The are splited by either spaces or commas. When spaces are used, it is required
to quote the whole specifiacion as one argument, but then commas can be used in
the installation names:
perlbrew exec --with '5.12 5.12,debug 5.14.2@nobita @shizuka' cpanm Moo
As demonstrated above, "perl-" prefix can be omitted, and lib names can be
specified too. Lib names can appear without a perl installation name, in such
cases it is assumed to be "current perl".
At the moment, any specified names that fails to be resolved as a real
installation names are silently ignored in the output. Also, the command exit
status are not populated back.
Usage: perlbrew env <name>
Low-level command. Invoke this command to see the list of environment
variables that are set by C<perlbrew> itself for shell integration.
The output is something similar to this (if your shell is bash/zsh):
export PERLBREW_ROOT=/Users/gugod/perl5/perlbrew
export PERLBREW_PATH=/Users/gugod/perl5/perlbrew/bin:/Users/gugod/perl5/perlbrew/perls/current/bin
export PERLBREW_PERL=perl-5.14.1
tcsh / csh users shall seens lines of 'setenv' statements instead of `export`.
Usage: perlbrew symlink-executables <name>
Low-level command. This command is used to create the C<perl> executable
symbolic link to, say, C<perl5.13.6>. This is only required for
development version of perls.
You don't need to do this unless you have been using old perlbrew to install
perls, and you find youself confused because the perl that you just installed
appears to be missing after invoking `use` or `switch`. perbrew changes its
installation layout since version 0.11, which generades symlinks to executables
in a better way.
If you just upgraded perlbrew (from 0.11 or earlier versions) and C<perlbrew
switch> failed to work after you switch to a development release of perl, say,
perl-5.13.6, run this command:
perlbrew symlink-executables perl-5.13.6
This essentially creates this symlink:
-> ${PERLBREW_ROOT}/perls/perl-5.13.6/bin/perl5.13.6
Newly installed perls, whether they are development versions or not, does not
need manually treatment with this command.
Usage: perlbrew install-cpanm
Install the C<cpanm> standalone executable in C<$PERLBREW_ROOT/bin>.
For more rationale about the existence of this command, read
Usage: perlbrew install-patchperl
Install the C<patchperl> standalone executable in C<$PERLBREW_ROOT/bin>. This
is automaticall invoked if your perlbrew installation is done with the
installer, but not with cpan.
For more rationale about the existence of this command, read
Usage: perlbrew self-upgrade
This command upgrades Perlbrew to its latest version.
Usage: perlbrew self-install
NOTICE: You should not need to run this command in your daily routine.
This command install perlbrew itself to C<$PERLBREW_ROOT/bin>. It is intended
used by the perlbrew installer. However, you may manually do the following to
re-install only the C<perlbrew> executable:
curl -kL -o perlbrew
perl ./perlbrew self-install
It is slightly different from running the perlbrew installer because
C<patchperl> is not installed in this case.
Usage: perlbrew version
Show the version of perlbrew.
perlbrew lib list
perlbrew lib create <lib-name>
perlbrew lib delete <lib-name>
The `lib` command is used to manipulate local::lib roots inside perl
installations. Effectively it is similar to `perl
-Mlocal::lib=/path/to/lib-name`, but a little bit more than just that.
A lib name can be a short name, containing alphanumeric, like 'awesome', or a
full name, prefixed by a perl installation name and a '@' sign, for example,
Here are some a brief examples to invoke the `lib` command:
# Create libs by name
perlbrew lib create nobita
perlbrew lib create perl-5.12.3@shizuka
perlbrew list # See the list of use/switch targets.
# Activate a lib in current shell.
perlbrew use perl-5.12.3@nobita
perlbrew use perl-5.14.2@nobita
# Activate a lib as default.
perlbrew switch perl-5.14.2@nobita
# Delete the lib
perlbrew lib delete nobita
perlbrew lib delete perl-5.12.3@shizuka
Short lib names are local to current perl. A lib name 'nobita' can refer to
'perl-5.12.3@nobita' or 'perl-5.14.2@nobita', depending on your current perl.
When C<use>ing or C<switch>ing to a lib, always provide the long name. A simple
rule: the argument to C<use> or C<switch> command should appear in the output of
C<perlbrew list>.
Usage: perlbrew upgrade-perl
Minor Perl releases (ex. 5.x.*) are binary compatible with one another, so this
command offers you the ability to upgrade older perlbrew environments in place.
It upgrades the currently activated perl to its latest released brothers. If you
have a shell with 5.14.0 activated, it upgrades it to 5.14.2.
perlbrew download perl-5.14.2
perlbrew download perl-5.16.1
perlbrew download perl-5.17.3
Download the specified version of perl distribution tarball under C<<
$PERLBREW_ROOT/dists/ >> directory.
Usage: perlbrew install-ack
Install the standalone version of C<ack> program under C<$PERLBREW_ROOT/bin>.
List all installed cpan modules for the current perl.
This command can be used in conjunction with `perlbrew exec` to migrate
your module installation to different perl. The following command
re-installs all modules under perl-5.16.0:
perlbrew list-modules | perlbrew exec --with perl-5.16.0 cpanm
If you are upgrading C<perlbrew> from 0.16 or ealier versions to a recent
one (0.40-ish), you should do these steps to adjust your perl installations
afterwards (you might need to change the value of PERLBREW_ROOT):
export PERLBREW_ROOT=${HOME}/perl5/perlbrew
rm -f $PERLBREW_ROOT/perls/current
rm -f `find $PERLBREW_ROOT/perls/bin -type l`
perlbrew symlink-executables
perlbrew init
Following the instructions on screen to tweak your shell a bit. Then it
should be good.
=head1 SEE ALSO
L<App::perlbrew>, L<App::cpanminus>, L<Devel::PatchPerl>
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