Perl and Perl Module Administration in the Modern Era

The Perl provided by your OS is ancient (yes, it is) and probably broken. We can fix that. Most of your programming problems are probably solved by a Perl module from CPAN, but if you don't know what that is, or how to install modules from it, you'll never use it. We can fix that as well. You've got production code that needs to keep running, but you still want to forge on with modern tools and approaches. We can help with that as well.
This talk provides a rapid introduction to perlbrew, cpanminus, and local::lib.

Transcript

1. Perl and Perl Module Administration
   in the Modern Era
   perlbrew, cpanminus, and local::lib
   Diab Jerius
   Smithsonian Astrophysical Observatory
   20 March 2013
   Code Coffee
   Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 1 / 25
   

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2. Outline
   1 The Tao of Perl Management
   2 perlbrew
   3 local::lib
   4 cpanminus
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3. The Tao of Perl management
   Managing Perl and its modules need not be complicated.
   There are three tools (and maybe fewer) that you need to know about:
   perlbrew – manage Perl and libraries of Perl Modules
   cpanm – install Perl modules from CPAN (and beyond)
   local::lib – manage local Perl Modules
   Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 3 / 25
   

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4. perlbrew
   What does it do?
   perlbrew handles most aspects of managing Perl installations. It can
   manage multiple versions of Perl
   install or upgrade Perl (in place!)
   temporarily or permanently switch your current version of Perl
   manage separate collections of modules (e.g. development versus
   production).
   It works best under POSIX-like shells (bash, zsh, etc.)
   Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 4 / 25
   

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5. perlbrew
   When to use it?
   Use perlbrew for . . .
   Installing a modern Perl if your system Perl is old or broken
   Freezing environments for legacy code.
   Testing/Developing against different versions of Perl
   Separating libraries of modules for production and development
   Creating throwaway sandbox environments.
   Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 5 / 25
   

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6. perlbrew
   How to install it
   Here’s how to install perlbrew:
   % curl -skL http://install.perlbrew.pl1 | bash
   1A shout out to Poland, the official domain for Perl.
   Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 6 / 25
   

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7. perlbrew
   Just Install It!
   % curl -skL http://install.perlbrew.pl | bash
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8. perlbrew
   Just Install It!
   % curl -skL http://install.perlbrew.pl | bash
   ## Download the latest perlbrew
   ## Installing perlbrew
   perlbrew is installed: ˜/perl5/perlbrew/bin/perlbrew
   perlbrew root (˜/perl5/perlbrew) is initialized.
   Append the following piece of code to the end of your ˜/.bash_profile and start a new shell,
   perlbrew should be up and fully functional from there:
   source ˜/perl5/perlbrew/etc/bashrc
   Simply run ‘perlbrew‘ for usage details.
   Happy brewing!
   ## Installing patchperl
   ## Done.
   %
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9. perlbrew
   Just Install It!
   % curl -skL http://install.perlbrew.pl | bash
   ## Download the latest perlbrew
   ## Installing perlbrew
   perlbrew is installed: ˜/perl5/perlbrew/bin/perlbrew
   perlbrew root (˜/perl5/perlbrew) is initialized.
   Append the following piece of code to the end of your ˜/.bash_profile and start a new shell,
   perlbrew should be up and fully functional from there:
   source ˜/perl5/perlbrew/etc/bashrc
   Simply run ‘perlbrew‘ for usage details.
   Happy brewing!
   ## Installing patchperl
   ## Done.
   % source ˜/perl5/perlbrew/etc/bashrc
   %
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10. Using perlbrew
    Installing Perl
    First, let’s find out which versions of Perl are available:
    %
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 8 / 25
    

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11. Using perlbrew
    Installing Perl
    First, let’s find out which versions of Perl are available:
    % perlbrew available
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12. Using perlbrew
    Installing Perl
    First, let’s find out which versions of Perl are available:
    % perlbrew available
    perl-5.14.4-RC2
    perl-5.16.2
    perl-5.14.4
    perl-5.12.5
    perl-5.10.1
    perl-5.8.9
    perl-5.6.2
    perl5.005_04
    perl5.004_05
    perl5.003_07
    %
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13. Using perlbrew
    Installing the stable version of Perl
    Now we’ll install the latest stable version:
    %
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14. Using perlbrew
    Installing the stable version of Perl
    Now we’ll install the latest stable version:
    % perlbrew install stable
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15. Using perlbrew
    Installing the stable version of Perl
    Now we’ll install the latest stable version:
    % perlbrew install stable
    Fetching perl 5.16.2 as
    /home/newbie/perl5/perlbrew/dists/perl-5.16.2.tar.bz2
    Installing /home/newbie/perl5/perlbrew/build/perl-5.16.2 into
    ˜/perl5/perlbrew/perls/perl-5.16.2
    This could take a while. You can run the following
    command on another shell to track the status:
    tail -f ˜/perl5/perlbrew/build.perl-5.16.2.log
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 9 / 25
    

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16. Using perlbrew
    Installing the stable version of Perl
    Now we’ll install the latest stable version:
    % perlbrew install stable
    Fetching perl 5.16.2 as
    /home/newbie/perl5/perlbrew/dists/perl-5.16.2.tar.bz2
    Installing /home/newbie/perl5/perlbrew/build/perl-5.16.2 into
    ˜/perl5/perlbrew/perls/perl-5.16.2
    This could take a while. You can run the following
    command on another shell to track the status:
    tail -f ˜/perl5/perlbrew/build.perl-5.16.2.log
    perl-5.16.2 is successfully installed.
    %
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17. Using perlbrew
    Installing a common older version
    Let’s also install Perl 5.10.1 to run old production code.
    %
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18. Using perlbrew
    Installing a common older version
    Let’s also install Perl 5.10.1 to run old production code.
    % perlbrew install 5.10.1
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19. Using perlbrew
    Installing a common older version
    Let’s also install Perl 5.10.1 to run old production code.
    % perlbrew install 5.10.1
    Fetching perl 5.10.1 as
    /home/newbie/perl5/perlbrew/dists/perl-5.10.1.tar.bz2
    Installing /home/newbie/perl5/perlbrew/build/perl-5.10.1 into
    ˜/perl5/perlbrew/perls/perl-5.10.1
    This could take a while. You can run the following
    command on another shell to track the status:
    tail -f ˜/perl5/perlbrew/build.perl-5.10.1.log
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 10 / 25
    

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20. Using perlbrew
    Installing a common older version
    Let’s also install Perl 5.10.1 to run old production code.
    % perlbrew install 5.10.1
    Fetching perl 5.10.1 as
    /home/newbie/perl5/perlbrew/dists/perl-5.10.1.tar.bz2
    Installing /home/newbie/perl5/perlbrew/build/perl-5.10.1 into
    ˜/perl5/perlbrew/perls/perl-5.10.1
    This could take a while. You can run the following
    command on another shell to track the status:
    tail -f ˜/perl5/perlbrew/build.perl-5.10.1.log
    perl-5.10.1 is successfully installed.
    %
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 10 / 25
    

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21. perlbrew
    Choosing a default Perl
    At this point we have two versions of Perl installed, but haven’t chosen a default.
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 11 / 25
    

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22. perlbrew
    Choosing a default Perl
    At this point we have two versions of Perl installed, but haven’t chosen a default.
    First, confirm the installed Perls
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 11 / 25
    

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23. perlbrew
    Choosing a default Perl
    At this point we have two versions of Perl installed, but haven’t chosen a default.
    First, confirm the installed Perls
    %
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24. perlbrew
    Choosing a default Perl
    At this point we have two versions of Perl installed, but haven’t chosen a default.
    First, confirm the installed Perls
    % perlbrew list
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25. perlbrew
    Choosing a default Perl
    At this point we have two versions of Perl installed, but haven’t chosen a default.
    First, confirm the installed Perls
    % perlbrew list
    perl-5.10.1
    perl-5.16.2
    %
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26. perlbrew
    Choosing a default Perl
    At this point we have two versions of Perl installed, but haven’t chosen a default.
    First, confirm the installed Perls
    % perlbrew list
    perl-5.10.1
    perl-5.16.2
    %
    Now, let’s make 5.16.2 the default:
    %
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27. perlbrew
    Choosing a default Perl
    At this point we have two versions of Perl installed, but haven’t chosen a default.
    First, confirm the installed Perls
    % perlbrew list
    perl-5.10.1
    perl-5.16.2
    %
    Now, let’s make 5.16.2 the default:
    % perlbrew switch 5.16.2
    %
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28. perlbrew
    Choosing a default Perl
    At this point we have two versions of Perl installed, but haven’t chosen a default.
    First, confirm the installed Perls
    % perlbrew list
    perl-5.10.1
    perl-5.16.2
    %
    Now, let’s make 5.16.2 the default:
    % perlbrew switch 5.16.2
    % perlbrew list
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29. perlbrew
    Choosing a default Perl
    At this point we have two versions of Perl installed, but haven’t chosen a default.
    First, confirm the installed Perls
    % perlbrew list
    perl-5.10.1
    perl-5.16.2
    %
    Now, let’s make 5.16.2 the default:
    % perlbrew switch 5.16.2
    % perlbrew list
    perl-5.10.1
    * perl-5.16.2
    %
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 11 / 25
    

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30. perlbrew
    Choosing a default Perl
    At this point we have two versions of Perl installed, but haven’t chosen a default.
    First, confirm the installed Perls
    % perlbrew list
    perl-5.10.1
    perl-5.16.2
    %
    Now, let’s make 5.16.2 the default:
    % perlbrew switch 5.16.2
    % perlbrew list
    perl-5.10.1
    * perl-5.16.2
    %
    To temporarily use a different Perl
    environment in the current shell,
    %
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31. perlbrew
    Choosing a default Perl
    At this point we have two versions of Perl installed, but haven’t chosen a default.
    First, confirm the installed Perls
    % perlbrew list
    perl-5.10.1
    perl-5.16.2
    %
    Now, let’s make 5.16.2 the default:
    % perlbrew switch 5.16.2
    % perlbrew list
    perl-5.10.1
    * perl-5.16.2
    %
    To temporarily use a different Perl
    environment in the current shell,
    % perlbrew use 5.16.2
    %
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 11 / 25
    

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32. perlbrew
    Upgrading Perl
    What if a new point release of Perl is out? Let’s upgrade Perl in place:
    %
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33. perlbrew
    Upgrading Perl
    What if a new point release of Perl is out? Let’s upgrade Perl in place:
    % perlbrew upgrade-perl
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34. perlbrew
    Upgrading Perl
    What if a new point release of Perl is out? Let’s upgrade Perl in place:
    % perlbrew upgrade-perl
    Upgrading perl-5.16.2 to 5.16.3
    Fetching perl 5.16.3 as
    /home/newbie/perl5/perlbrew/dists/perl-5.16.3.tar.bz2
    Installing /home/newbie/perl5/perlbrew/build/perl-5.16.3 into
    ˜/perl5/perlbrew/perls/perl-5.16.2
    This could take a while. You can run the following
    command on another shell to track the status:
    tail -f /perl5/perlbrew/build.perl-5.16.3.log
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 12 / 25
    

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35. perlbrew
    Upgrading Perl
    What if a new point release of Perl is out? Let’s upgrade Perl in place:
    % perlbrew upgrade-perl
    Upgrading perl-5.16.2 to 5.16.3
    Fetching perl 5.16.3 as
    /home/newbie/perl5/perlbrew/dists/perl-5.16.3.tar.bz2
    Installing /home/newbie/perl5/perlbrew/build/perl-5.16.3 into
    ˜/perl5/perlbrew/perls/perl-5.16.2
    This could take a while. You can run the following
    command on another shell to track the status:
    tail -f /perl5/perlbrew/build.perl-5.16.3.log
    perl-5.16.2 is successfully installed.
    %
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 12 / 25
    

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36. perlbrew
    Upgrading Perl
    What if a new point release of Perl is out? Let’s upgrade Perl in place:
    % perlbrew upgrade-perl
    Upgrading perl-5.16.2 to 5.16.3
    Fetching perl 5.16.3 as
    /home/newbie/perl5/perlbrew/dists/perl-5.16.3.tar.bz2
    Installing /home/newbie/perl5/perlbrew/build/perl-5.16.3 into
    ˜/perl5/perlbrew/perls/perl-5.16.2
    This could take a while. You can run the following
    command on another shell to track the status:
    tail -f /perl5/perlbrew/build.perl-5.16.3.log
    perl-5.16.2 is successfully installed.
    % perlbrew list
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 12 / 25
    

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37. perlbrew
    Upgrading Perl
    What if a new point release of Perl is out? Let’s upgrade Perl in place:
    % perlbrew upgrade-perl
    Upgrading perl-5.16.2 to 5.16.3
    Fetching perl 5.16.3 as
    /home/newbie/perl5/perlbrew/dists/perl-5.16.3.tar.bz2
    Installing /home/newbie/perl5/perlbrew/build/perl-5.16.3 into
    ˜/perl5/perlbrew/perls/perl-5.16.2
    This could take a while. You can run the following
    command on another shell to track the status:
    tail -f /perl5/perlbrew/build.perl-5.16.3.log
    perl-5.16.2 is successfully installed.
    % perlbrew list
    perl-5.10.1
    * perl-5.16.2 (5.16.3)
    %
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38. perlbrew
    Local libraries
    perlbrew lib manages libraries (collections) of modules.
    Libraries are. . .
    independent collections of modules
    associated with a single Perl installation
    stored independently of the associated Perl
    structured in the standard Perl directory layout
    especially useful for group development.
    central repository of Perl installations and production libraries
    developers have their own libraries for testing and development
    Unfortunately, only one library may be in use at any one time.
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 13 / 25
    

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39. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
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40. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
    Create ’em:
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41. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
    Create ’em:
    %
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42. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
    Create ’em:
    % perlbrew lib create prod
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43. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
    Create ’em:
    % perlbrew lib create prod
    lib ’perl-5.16.2@prod’ is created.
    %
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44. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
    Create ’em:
    % perlbrew lib create prod
    lib ’perl-5.16.2@prod’ is created.
    % perlbrew lib create dev
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45. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
    Create ’em:
    % perlbrew lib create prod
    lib ’perl-5.16.2@prod’ is created.
    % perlbrew lib create dev
    lib ’perl-5.16.2@dev’ is created.
    %
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 14 / 25
    

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46. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
    Create ’em:
    % perlbrew lib create prod
    lib ’perl-5.16.2@prod’ is created.
    % perlbrew lib create dev
    lib ’perl-5.16.2@dev’ is created.
    % perlbrew list
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47. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
    Create ’em:
    % perlbrew lib create prod
    lib ’perl-5.16.2@prod’ is created.
    % perlbrew lib create dev
    lib ’perl-5.16.2@dev’ is created.
    % perlbrew list
    perl-5.10.1
    * perl-5.16.2 (5.16.3)
    perl-5.16.2@dev
    perl-5.16.2@prod
    %
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 14 / 25
    

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48. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
    Create ’em:
    % perlbrew lib create prod
    lib ’perl-5.16.2@prod’ is created.
    % perlbrew lib create dev
    lib ’perl-5.16.2@dev’ is created.
    % perlbrew list
    perl-5.10.1
    * perl-5.16.2 (5.16.3)
    perl-5.16.2@dev
    perl-5.16.2@prod
    %
    Use the @dev one:
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 14 / 25
    

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49. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
    Create ’em:
    % perlbrew lib create prod
    lib ’perl-5.16.2@prod’ is created.
    % perlbrew lib create dev
    lib ’perl-5.16.2@dev’ is created.
    % perlbrew list
    perl-5.10.1
    * perl-5.16.2 (5.16.3)
    perl-5.16.2@dev
    perl-5.16.2@prod
    %
    Use the @dev one:
    %
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 14 / 25
    

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50. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
    Create ’em:
    % perlbrew lib create prod
    lib ’perl-5.16.2@prod’ is created.
    % perlbrew lib create dev
    lib ’perl-5.16.2@dev’ is created.
    % perlbrew list
    perl-5.10.1
    * perl-5.16.2 (5.16.3)
    perl-5.16.2@dev
    perl-5.16.2@prod
    %
    Use the @dev one:
    % perlbrew use @dev
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51. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
    Create ’em:
    % perlbrew lib create prod
    lib ’perl-5.16.2@prod’ is created.
    % perlbrew lib create dev
    lib ’perl-5.16.2@dev’ is created.
    % perlbrew list
    perl-5.10.1
    * perl-5.16.2 (5.16.3)
    perl-5.16.2@dev
    perl-5.16.2@prod
    %
    Use the @dev one:
    % perlbrew use @dev
    %
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 14 / 25
    

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52. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
    Create ’em:
    % perlbrew lib create prod
    lib ’perl-5.16.2@prod’ is created.
    % perlbrew lib create dev
    lib ’perl-5.16.2@dev’ is created.
    % perlbrew list
    perl-5.10.1
    * perl-5.16.2 (5.16.3)
    perl-5.16.2@dev
    perl-5.16.2@prod
    %
    Use the @dev one:
    % perlbrew use @dev
    % perlbrew list
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53. perlbrew
    Create some library roots
    Library creation and management is straightforward.
    Let’s create two library roots: production & development
    Create ’em:
    % perlbrew lib create prod
    lib ’perl-5.16.2@prod’ is created.
    % perlbrew lib create dev
    lib ’perl-5.16.2@dev’ is created.
    % perlbrew list
    perl-5.10.1
    * perl-5.16.2 (5.16.3)
    perl-5.16.2@dev
    perl-5.16.2@prod
    %
    Use the @dev one:
    % perlbrew use @dev
    % perlbrew list
    perl-5.10.1
    perl-5.16.2 (5.16.3)
    * perl-5.16.2@dev
    perl-5.16.2@prod
    %
    Now modules will get installed into the @dev library and @prod stays clean.
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 14 / 25
    

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54. perlbrew
    Install cpanm
    Finally, let’s install cpanminus (cpanm).
    %
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55. perlbrew
    Install cpanm
    Finally, let’s install cpanminus (cpanm).
    % perlbrew install-cpanm
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56. perlbrew
    Install cpanm
    Finally, let’s install cpanminus (cpanm).
    % perlbrew install-cpanm
    cpanm is installed to
    /home/newbie/perl5/perlbrew/bin/cpanm
    %
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57. perlbrew
    Install cpanm
    Finally, let’s install cpanminus (cpanm).
    % perlbrew install-cpanm
    cpanm is installed to
    /home/newbie/perl5/perlbrew/bin/cpanm
    %
    This mode of installation is special to perlbrew
    There’s another way of installing cpanm when not using perlbrew.
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58. perlbrew
    How does it work?
    Ok, but how does it work?
    After you
    % source ˜/perl5/perlbrew/etc/bashrc
    perlbrew sets up your environment so that
    PATH includes the directory containing the selected Perl
    PERL5LIB includes the library directory (if any).
    cpanm and cpan will install modules into the correct directory
    % command -v perl
    /home/newbie/perl5/perlbrew/perls/perl-5.16.2/bin/perl
    % printenv PERL5LIB
    /home/newbie/.perlbrew/libs/perl-5.16.2@dev/lib/perl5
    To allow programs to track the environment, encode the Perl location as
    #! /usr/bin/env perl
    and they will use the first Perl found in your PATH.
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59. perlbrew
    Hardcoding the environment
    To ensure your code runs against a particular environment
    Encode the absolute location to Perl in the main program:
    #! /home/newbie/perl5/perlbrew/perls/perl-5.16.2/bin/perl
    To specify a lib root, do it either explicitly
    use ’/home/newbie/.perlbrew/libs/perl-5.16.2dev/lib/perl5’;
    or via local::lib
    use local::lib ’/home/newbie/.perlbrew/libs/perl-5.16.2@dev’;
    make sure that local::lib is installed for the base Perl, e.g.
    % perlbrew switch 5.16.2
    % cpanm local::lib
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60. perlbrew
    Hardcoding the environment, the easy way
    The easiest way to hard-code the environment is to not use libraries.
    Just install the required version of Perl with a different name:
    %
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61. perlbrew
    Hardcoding the environment, the easy way
    The easiest way to hard-code the environment is to not use libraries.
    Just install the required version of Perl with a different name:
    % perlbrew install 5.10.1 --as 5.10.1-prod
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62. perlbrew
    Hardcoding the environment, the easy way
    The easiest way to hard-code the environment is to not use libraries.
    Just install the required version of Perl with a different name:
    % perlbrew install 5.10.1 --as 5.10.1-prod
    Installing /home/newbie/perl5/perlbrew/build/perl-5.10.1 into
    ˜/perl5/perlbrew/perls/perl-5.10.1-prod
    This could take a while. You can run the following
    command on another shell to track the status:
    tail -f ˜/perl5/perlbrew/build.perl-5.10.1.log
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63. perlbrew
    Hardcoding the environment, the easy way
    The easiest way to hard-code the environment is to not use libraries.
    Just install the required version of Perl with a different name:
    % perlbrew install 5.10.1 --as 5.10.1-prod
    Installing /home/newbie/perl5/perlbrew/build/perl-5.10.1 into
    ˜/perl5/perlbrew/perls/perl-5.10.1-prod
    This could take a while. You can run the following
    command on another shell to track the status:
    tail -f ˜/perl5/perlbrew/build.perl-5.10.1.log
    perl-5.10.1-prod is successfully installed.
    %
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64. perlbrew
    Hardcoding the environment, the easy way
    The easiest way to hard-code the environment is to not use libraries.
    Just install the required version of Perl with a different name:
    % perlbrew install 5.10.1 --as 5.10.1-prod
    Installing /home/newbie/perl5/perlbrew/build/perl-5.10.1 into
    ˜/perl5/perlbrew/perls/perl-5.10.1-prod
    This could take a while. You can run the following
    command on another shell to track the status:
    tail -f ˜/perl5/perlbrew/build.perl-5.10.1.log
    perl-5.10.1-prod is successfully installed.
    % perlbrew list
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65. perlbrew
    Hardcoding the environment, the easy way
    The easiest way to hard-code the environment is to not use libraries.
    Just install the required version of Perl with a different name:
    % perlbrew install 5.10.1 --as 5.10.1-prod
    Installing /home/newbie/perl5/perlbrew/build/perl-5.10.1 into
    ˜/perl5/perlbrew/perls/perl-5.10.1-prod
    This could take a while. You can run the following
    command on another shell to track the status:
    tail -f ˜/perl5/perlbrew/build.perl-5.10.1.log
    perl-5.10.1-prod is successfully installed.
    % perlbrew list
    5.10.1-prod
    perl-5.10.1
    perl-5.16.2 (5.16.3)
    * perl-5.16.2@dev
    perl-5.16.2@prod
    %
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66. local::lib
    A Local Library
    Use local::lib if . . .
    the locally available Perl is sufficient; and
    you just want to easily install Perl modules
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67. local::lib
    Installation
    local::lib is slightly more complex to install
    %
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68. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    %
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69. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    % PERL5LIB=˜/perl5/lib/perl5 perl cpanm -n --local-lib=˜/perl5 local::lib
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70. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    % PERL5LIB=˜/perl5/lib/perl5 perl cpanm -n --local-lib=˜/perl5 local::lib
    -> Working on local::lib
    Fetching http://www.cpan.org/authors/id/A/AP/APEIRON/local-lib-1.008009.tar.gz ... OK
    ==> Found dependencies: ExtUtils::MakeMaker
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71. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    % PERL5LIB=˜/perl5/lib/perl5 perl cpanm -n --local-lib=˜/perl5 local::lib
    -> Working on local::lib
    Fetching http://www.cpan.org/authors/id/A/AP/APEIRON/local-lib-1.008009.tar.gz ... OK
    ==> Found dependencies: ExtUtils::MakeMaker
    work...
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72. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    % PERL5LIB=˜/perl5/lib/perl5 perl cpanm -n --local-lib=˜/perl5 local::lib
    -> Working on local::lib
    Fetching http://www.cpan.org/authors/id/A/AP/APEIRON/local-lib-1.008009.tar.gz ... OK
    ==> Found dependencies: ExtUtils::MakeMaker
    work...work...
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73. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    % PERL5LIB=˜/perl5/lib/perl5 perl cpanm -n --local-lib=˜/perl5 local::lib
    -> Working on local::lib
    Fetching http://www.cpan.org/authors/id/A/AP/APEIRON/local-lib-1.008009.tar.gz ... OK
    ==> Found dependencies: ExtUtils::MakeMaker
    work...work...work...
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74. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    % PERL5LIB=˜/perl5/lib/perl5 perl cpanm -n --local-lib=˜/perl5 local::lib
    -> Working on local::lib
    Fetching http://www.cpan.org/authors/id/A/AP/APEIRON/local-lib-1.008009.tar.gz ... OK
    ==> Found dependencies: ExtUtils::MakeMaker
    work...work...work...
    Successfully installed local-lib-1.008009
    7 distributions installed
    %
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75. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    % PERL5LIB=˜/perl5/lib/perl5 perl cpanm -n --local-lib=˜/perl5 local::lib
    -> Working on local::lib
    Fetching http://www.cpan.org/authors/id/A/AP/APEIRON/local-lib-1.008009.tar.gz ... OK
    ==> Found dependencies: ExtUtils::MakeMaker
    work...work...work...
    Successfully installed local-lib-1.008009
    7 distributions installed
    % mkdir ˜/perl5/etc
    %
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76. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    % PERL5LIB=˜/perl5/lib/perl5 perl cpanm -n --local-lib=˜/perl5 local::lib
    -> Working on local::lib
    Fetching http://www.cpan.org/authors/id/A/AP/APEIRON/local-lib-1.008009.tar.gz ... OK
    ==> Found dependencies: ExtUtils::MakeMaker
    work...work...work...
    Successfully installed local-lib-1.008009
    7 distributions installed
    % mkdir ˜/perl5/etc
    % echo ’eval $(perl -I$HOME/perl5/lib/perl5 -Mlocal::lib)’ > ˜/perl5/etc/locallibrc
    %
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77. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    % PERL5LIB=˜/perl5/lib/perl5 perl cpanm -n --local-lib=˜/perl5 local::lib
    -> Working on local::lib
    Fetching http://www.cpan.org/authors/id/A/AP/APEIRON/local-lib-1.008009.tar.gz ... OK
    ==> Found dependencies: ExtUtils::MakeMaker
    work...work...work...
    Successfully installed local-lib-1.008009
    7 distributions installed
    % mkdir ˜/perl5/etc
    % echo ’eval $(perl -I$HOME/perl5/lib/perl5 -Mlocal::lib)’ > ˜/perl5/etc/locallibrc
    % source ˜/perl5/etc/locallibrc
    %
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78. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    % PERL5LIB=˜/perl5/lib/perl5 perl cpanm -n --local-lib=˜/perl5 local::lib
    -> Working on local::lib
    Fetching http://www.cpan.org/authors/id/A/AP/APEIRON/local-lib-1.008009.tar.gz ... OK
    ==> Found dependencies: ExtUtils::MakeMaker
    work...work...work...
    Successfully installed local-lib-1.008009
    7 distributions installed
    % mkdir ˜/perl5/etc
    % echo ’eval $(perl -I$HOME/perl5/lib/perl5 -Mlocal::lib)’ > ˜/perl5/etc/locallibrc
    % source ˜/perl5/etc/locallibrc
    % perl cpanm App::cpanminus
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79. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    % PERL5LIB=˜/perl5/lib/perl5 perl cpanm -n --local-lib=˜/perl5 local::lib
    -> Working on local::lib
    Fetching http://www.cpan.org/authors/id/A/AP/APEIRON/local-lib-1.008009.tar.gz ... OK
    ==> Found dependencies: ExtUtils::MakeMaker
    work...work...work...
    Successfully installed local-lib-1.008009
    7 distributions installed
    % mkdir ˜/perl5/etc
    % echo ’eval $(perl -I$HOME/perl5/lib/perl5 -Mlocal::lib)’ > ˜/perl5/etc/locallibrc
    % source ˜/perl5/etc/locallibrc
    % perl cpanm App::cpanminus
    work...
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80. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    % PERL5LIB=˜/perl5/lib/perl5 perl cpanm -n --local-lib=˜/perl5 local::lib
    -> Working on local::lib
    Fetching http://www.cpan.org/authors/id/A/AP/APEIRON/local-lib-1.008009.tar.gz ... OK
    ==> Found dependencies: ExtUtils::MakeMaker
    work...work...work...
    Successfully installed local-lib-1.008009
    7 distributions installed
    % mkdir ˜/perl5/etc
    % echo ’eval $(perl -I$HOME/perl5/lib/perl5 -Mlocal::lib)’ > ˜/perl5/etc/locallibrc
    % source ˜/perl5/etc/locallibrc
    % perl cpanm App::cpanminus
    work...work...
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81. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    % PERL5LIB=˜/perl5/lib/perl5 perl cpanm -n --local-lib=˜/perl5 local::lib
    -> Working on local::lib
    Fetching http://www.cpan.org/authors/id/A/AP/APEIRON/local-lib-1.008009.tar.gz ... OK
    ==> Found dependencies: ExtUtils::MakeMaker
    work...work...work...
    Successfully installed local-lib-1.008009
    7 distributions installed
    % mkdir ˜/perl5/etc
    % echo ’eval $(perl -I$HOME/perl5/lib/perl5 -Mlocal::lib)’ > ˜/perl5/etc/locallibrc
    % source ˜/perl5/etc/locallibrc
    % perl cpanm App::cpanminus
    work...work...work...
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82. local::lib
    Installation
    local::lib is slightly more complex to install
    % curl -sLO http://xrl.us/cpanm
    % PERL5LIB=˜/perl5/lib/perl5 perl cpanm -n --local-lib=˜/perl5 local::lib
    -> Working on local::lib
    Fetching http://www.cpan.org/authors/id/A/AP/APEIRON/local-lib-1.008009.tar.gz ... OK
    ==> Found dependencies: ExtUtils::MakeMaker
    work...work...work...
    Successfully installed local-lib-1.008009
    7 distributions installed
    % mkdir ˜/perl5/etc
    % echo ’eval $(perl -I$HOME/perl5/lib/perl5 -Mlocal::lib)’ > ˜/perl5/etc/locallibrc
    % source ˜/perl5/etc/locallibrc
    % perl cpanm App::cpanminus
    work...work...work...
    Successfully installed App-cpanminus-1.6008
    1 distribution installed
    %
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83. local::lib
    How does it work?
    How does it work?
    After you
    % source ˜/perl5/etc/locallibrc
    local::lib sets up your environment so that
    PERL5LIB includes the library directory:
    % printenv PERL5LIB
    /home/newbie/perl5/lib/perl5
    so that Perl programs will see the local library.
    cpanm and cpan will install modules into the library directory
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84. cpanminus
    What is it?
    cpanm (more formally cpanminus) installs Perl modules
    a more modern companion of the cpan program
    install from CPAN, local disk, http://github.com
    install into custom locations
    install specific versions (or version ranges) of modules
    generate module dependency graphs without installing modules
    follows the dependency graph and automatically installs required modules
    works seamlessly with perlbrew and local::lib
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85. cpanminus
    What is CPAN?
    CPAN is. . .
    http://cpan.org
    http://metacpan.org
    the repository of Perl modules: numerical algorithms, process control,
    asynchronous IO, high-performance web servers, web frameworks, . . . .
    the solution to most of your (Perl programming) needs.
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 23 / 25
    

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86. cpanminus
    In action
    cpanm in action is typically quite boring.
    Here’s one use:
    I’d like to test an XML document handling module available from CPAN
    I don’t want to permanently store any of its dependencies
    % cpanm -n -l xml-trials XML::Hash
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87. cpanminus
    In action
    cpanm in action is typically quite boring.
    Here’s one use:
    I’d like to test an XML document handling module available from CPAN
    I don’t want to permanently store any of its dependencies
    % cpanm -n -l xml-trials XML::Hash
    -> Working on XML::Hash
    Fetching http://www.cpan.org/authors/id/B/BR/BRACETA/XML-Hash/XML-Hash-0.95.tar.gz ... OK
    Configuring XML-Hash-0.95 ... OK
    ==> Found dependencies: XML::DOM, Test::XML, XML::Simple, File::Slurp
    -> Working on XML::DOM
    Fetching http://www.cpan.org/authors/id/T/TJ/TJMATHER/XML-DOM-1.44.tar.gz ... OK
    Configuring XML-DOM-1.44 ... OK
    ==> Found dependencies: XML::Parser::PerlSAX, LWP::UserAgent, XML::RegExp, XML::Parser
    -> Working on XML::Parser::PerlSAX
    Fetching http://www.cpan.org/authors/id/K/KM/KMACLEOD/libxml-perl-0.08.tar.gz ... OK
    Configuring libxml-perl-0.08 ... OK
    ==> Found dependencies: XML::Parser
    -> Working on XML::Parser
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88. cpanminus
    In action
    cpanm in action is typically quite boring.
    Here’s one use:
    I’d like to test an XML document handling module available from CPAN
    I don’t want to permanently store any of its dependencies
    % cpanm -n -l xml-trials XML::Hash
    Fetching http://www.cpan.org/authors/id/T/TO/TODDR/XML-Parser-2.41.tar.gz ... OK
    Configuring XML-Parser-2.41 ... OK
    ==> Found dependencies: LWP
    -> Working on LWP
    Fetching http://www.cpan.org/authors/id/G/GA/GAAS/libwww-perl-6.05.tar.gz ... OK
    Configuring libwww-perl-6.05 ... OK
    ==> Found dependencies: URI::Escape, LWP::MediaTypes, Encode::Locale, HTTP::Status, HTTP:
    -> Working on URI::Escape
    Fetching http://www.cpan.org/authors/id/G/GA/GAAS/URI-1.60.tar.gz ... OK
    Configuring URI-1.60 ... OK
    Building URI-1.60 ... OK
    Successfully installed URI-1.60
    -> Working on LWP::MediaTypes
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89. cpanminus
    In action
    cpanm in action is typically quite boring.
    Here’s one use:
    I’d like to test an XML document handling module available from CPAN
    I don’t want to permanently store any of its dependencies
    % cpanm -n -l xml-trials XML::Hash
    Fetching http://www.cpan.org/authors/id/G/GA/GAAS/LWP-MediaTypes-6.02.tar.gz ... OK
    Configuring LWP-MediaTypes-6.02 ... OK
    Building LWP-MediaTypes-6.02 ... OK
    Successfully installed LWP-MediaTypes-6.02
    -> Working on Encode::Locale
    Fetching http://www.cpan.org/authors/id/G/GA/GAAS/Encode-Locale-1.03.tar.gz ... OK
    Configuring Encode-Locale-1.03 ... OK
    Building Encode-Locale-1.03 ... OK
    Successfully installed Encode-Locale-1.03
    -> Working on HTTP::Status
    Fetching http://www.cpan.org/authors/id/G/GA/GAAS/HTTP-Message-6.06.tar.gz ... OK
    Configuring HTTP-Message-6.06 ... OK
    ==> Found dependencies: IO::HTML, HTTP::Date
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90. cpanminus
    In action
    cpanm in action is typically quite boring.
    Here’s one use:
    I’d like to test an XML document handling module available from CPAN
    I don’t want to permanently store any of its dependencies
    % cpanm -n -l xml-trials XML::Hash
    -> Working on IO::HTML
    Fetching http://www.cpan.org/authors/id/C/CJ/CJM/IO-HTML-1.00.tar.gz ... OK
    Configuring IO-HTML-1.00 ... OK
    Building IO-HTML-1.00 ... OK
    Successfully installed IO-HTML-1.00
    -> Working on HTTP::Date
    Fetching http://www.cpan.org/authors/id/G/GA/GAAS/HTTP-Date-6.02.tar.gz ... OK
    Configuring HTTP-Date-6.02 ... OK
    Building HTTP-Date-6.02 ... OK
    Successfully installed HTTP-Date-6.02
    Building HTTP-Message-6.06 ... OK
    Successfully installed HTTP-Message-6.06
    -> Working on HTTP::Negotiate
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91. cpanminus
    In action
    cpanm in action is typically quite boring.
    Here’s one use:
    I’d like to test an XML document handling module available from CPAN
    I don’t want to permanently store any of its dependencies
    % cpanm -n -l xml-trials XML::Hash
    Fetching http://www.cpan.org/authors/id/G/GA/GAAS/HTTP-Negotiate-6.01.tar.gz ... OK
    Configuring HTTP-Negotiate-6.01 ... OK
    Building HTTP-Negotiate-6.01 ... OK
    Successfully installed HTTP-Negotiate-6.01
    -> Working on File::Listing
    Fetching http://www.cpan.org/authors/id/G/GA/GAAS/File-Listing-6.04.tar.gz ... OK
    Configuring File-Listing-6.04 ... OK
    Building File-Listing-6.04 ... OK
    Successfully installed File-Listing-6.04
    -> Working on HTML::Entities
    Fetching http://www.cpan.org/authors/id/G/GA/GAAS/HTML-Parser-3.69.tar.gz ... OK
    Configuring HTML-Parser-3.69 ... OK
    ==> Found dependencies: HTML::Tagset
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92. cpanminus
    In action
    cpanm in action is typically quite boring.
    Here’s one use:
    I’d like to test an XML document handling module available from CPAN
    I don’t want to permanently store any of its dependencies
    % cpanm -n -l xml-trials XML::Hash
    -> Working on HTML::Tagset
    Fetching http://www.cpan.org/authors/id/P/PE/PETDANCE/HTML-Tagset-3.20.tar.gz ... OK
    Configuring HTML-Tagset-3.20 ... OK
    Building HTML-Tagset-3.20 ... OK
    Successfully installed HTML-Tagset-3.20
    Building HTML-Parser-3.69 ... OK
    Successfully installed HTML-Parser-3.69
    -> Working on HTTP::Daemon
    Fetching http://www.cpan.org/authors/id/G/GA/GAAS/HTTP-Daemon-6.01.tar.gz ... OK
    Configuring HTTP-Daemon-6.01 ... OK
    Building HTTP-Daemon-6.01 ... OK
    Successfully installed HTTP-Daemon-6.01
    -> Working on Net::HTTP
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 24 / 25
    

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93. cpanminus
    In action
    cpanm in action is typically quite boring.
    Here’s one use:
    I’d like to test an XML document handling module available from CPAN
    I don’t want to permanently store any of its dependencies
    % cpanm -n -l xml-trials XML::Hash
    Fetching http://www.cpan.org/authors/id/G/GA/GAAS/Net-HTTP-6.06.tar.gz ... OK
    Configuring Net-HTTP-6.06 ... OK
    Building Net-HTTP-6.06 ... OK
    Successfully installed Net-HTTP-6.06
    -> Working on HTTP::Cookies
    Fetching http://www.cpan.org/authors/id/G/GA/GAAS/HTTP-Cookies-6.01.tar.gz ... OK
    Configuring HTTP-Cookies-6.01 ... OK
    Building HTTP-Cookies-6.01 ... OK
    Successfully installed HTTP-Cookies-6.01
    -> Working on WWW::RobotRules
    Fetching http://www.cpan.org/authors/id/G/GA/GAAS/WWW-RobotRules-6.02.tar.gz ... OK
    Configuring WWW-RobotRules-6.02 ... OK
    Building WWW-RobotRules-6.02 ... OK
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 24 / 25
    

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94. cpanminus
    In action
    cpanm in action is typically quite boring.
    Here’s one use:
    I’d like to test an XML document handling module available from CPAN
    I don’t want to permanently store any of its dependencies
    % cpanm -n -l xml-trials XML::Hash
    Successfully installed WWW-RobotRules-6.02
    Building libwww-perl-6.05 ... OK
    Successfully installed libwww-perl-6.05
    Building XML-Parser-2.41 ... OK
    Successfully installed XML-Parser-2.41
    Building libxml-perl-0.08 ... OK
    Successfully installed libxml-perl-0.08
    -> Working on XML::RegExp
    Fetching http://www.cpan.org/authors/id/T/TJ/TJMATHER/XML-RegExp-0.04.tar.gz ... OK
    Configuring XML-RegExp-0.04 ... OK
    Building XML-RegExp-0.04 ... OK
    Successfully installed XML-RegExp-0.04
    Building XML-DOM-1.44 ... OK
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 24 / 25
    

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95. cpanminus
    In action
    cpanm in action is typically quite boring.
    Here’s one use:
    I’d like to test an XML document handling module available from CPAN
    I don’t want to permanently store any of its dependencies
    % cpanm -n -l xml-trials XML::Hash
    Successfully installed XML-DOM-1.44
    -> Working on Test::XML
    Fetching http://www.cpan.org/authors/id/S/SE/SEMANTICO/Test-XML-0.08.tar.gz ... OK
    Configuring Test-XML-0.08 ... OK
    ==> Found dependencies: XML::SemanticDiff
    -> Working on XML::SemanticDiff
    Fetching http://www.cpan.org/authors/id/S/SH/SHLOMIF/XML-SemanticDiff-1.0000.tar.gz ... O
    Configuring XML-SemanticDiff-1.0000 ... OK
    Building XML-SemanticDiff-1.0000 ... OK
    Successfully installed XML-SemanticDiff-1.0000
    Building Test-XML-0.08 ... OK
    Successfully installed Test-XML-0.08
    -> Working on XML::Simple
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 24 / 25
    

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96. cpanminus
    In action
    cpanm in action is typically quite boring.
    Here’s one use:
    I’d like to test an XML document handling module available from CPAN
    I don’t want to permanently store any of its dependencies
    % cpanm -n -l xml-trials XML::Hash
    Fetching http://www.cpan.org/authors/id/G/GR/GRANTM/XML-Simple-2.20.tar.gz ... OK
    Configuring XML-Simple-2.20 ... OK
    ==> Found dependencies: XML::SAX, XML::NamespaceSupport, XML::SAX::Expat
    -> Working on XML::SAX
    Fetching http://www.cpan.org/authors/id/G/GR/GRANTM/XML-SAX-0.99.tar.gz ... OK
    Configuring XML-SAX-0.99 ... OK
    ==> Found dependencies: XML::NamespaceSupport, XML::SAX::Base
    -> Working on XML::NamespaceSupport
    Fetching http://www.cpan.org/authors/id/P/PE/PERIGRIN/XML-NamespaceSupport-1.11.tar.gz ..
    Configuring XML-NamespaceSupport-1.11 ... OK
    Building XML-NamespaceSupport-1.11 ... OK
    Successfully installed XML-NamespaceSupport-1.11
    -> Working on XML::SAX::Base
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 24 / 25
    

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97. cpanminus
    In action
    cpanm in action is typically quite boring.
    Here’s one use:
    I’d like to test an XML document handling module available from CPAN
    I don’t want to permanently store any of its dependencies
    % cpanm -n -l xml-trials XML::Hash
    Fetching http://www.cpan.org/authors/id/G/GR/GRANTM/XML-SAX-Base-1.08.tar.gz ... OK
    Configuring XML-SAX-Base-1.08 ... OK
    Building XML-SAX-Base-1.08 ... OK
    Successfully installed XML-SAX-Base-1.08
    Building XML-SAX-0.99 ... OK
    Successfully installed XML-SAX-0.99
    -> Working on XML::SAX::Expat
    Fetching http://www.cpan.org/authors/id/B/BJ/BJOERN/XML-SAX-Expat-0.40.tar.gz ... OK
    Configuring XML-SAX-Expat-0.40 ... OK
    Building XML-SAX-Expat-0.40 ... OK
    Successfully installed XML-SAX-Expat-0.40
    Building XML-Simple-2.20 ... OK
    Successfully installed XML-Simple-2.20
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 24 / 25
    

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98. cpanminus
    In action
    cpanm in action is typically quite boring.
    Here’s one use:
    I’d like to test an XML document handling module available from CPAN
    I don’t want to permanently store any of its dependencies
    % cpanm -n -l xml-trials XML::Hash
    -> Working on File::Slurp
    Fetching http://www.cpan.org/authors/id/U/UR/URI/File-Slurp-9999.19.tar.gz ... OK
    Configuring File-Slurp-9999.19 ... OK
    Building File-Slurp-9999.19 ... OK
    Successfully installed File-Slurp-9999.19
    Building XML-Hash-0.95 ... OK
    Successfully installed XML-Hash-0.95
    28 distributions installed
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 24 / 25
    

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99. cpanminus
    In action
    cpanm in action is typically quite boring.
    Here’s one use:
    I’d like to test an XML document handling module available from CPAN
    I don’t want to permanently store any of its dependencies
    % cpanm -n -l xml-trials XML::Hash
    Glad I’m not installing all of those by hand!
    Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 24 / 25
    

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100. cpanminus
     In action
     cpanm in action is typically quite boring.
     Here’s one use:
     I’d like to test an XML document handling module available from CPAN
     I don’t want to permanently store any of its dependencies
     % cpanm -n -l xml-trials XML::Hash
     To use the new module, temporarily update Perl’s search path:
     % export PERL5LIB=$PWD/xml-trials/lib/perl5:$PERL5LIB
     Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 24 / 25
     

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101. cpanminus
     In action
     cpanm in action is typically quite boring.
     Here’s one use:
     I’d like to test an XML document handling module available from CPAN
     I don’t want to permanently store any of its dependencies
     % cpanm -n -l xml-trials XML::Hash
     To use the new module, temporarily update Perl’s search path:
     % export PERL5LIB=$PWD/xml-trials/lib/perl5:$PERL5LIB
     And delete it when done...
     % rm -rf xml-trials
     Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 24 / 25
     

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102. Summary
     perlbrew – great in complex development and deployment environments
     local::lib – is for everything else
     cpanm – works everywhere and is the bee’s knees
     Diab Jerius (SAO) Managing Perl & Perl Modules Code Coffee 2013-03-20 25 / 25
     

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