Introduction to perlbrew

Transcript

1. None

2. Kang-min Liu @gugod

3. /me @gugod, ཱུ߁ຽ, Kang-min Liu Web programmer CPAN Author for

   ~100 distributions http://perlbrew.pl

4. /me @gugod, ཱུ߁ຽ, Kang-min Liu { Perl, Ruby, Javascript, HTML,

   CSS, SQL, Photoshop } programmer CPAN Author for ~100 distributions http://perlbrew.pl

5. perlbrew

6. ←

7. ← /usr/bin/perl /usr/local/bin/perl /opt/local/bin/perl /home/gugod/local/bin/perl

8. ← /usr/bin/perl5.8.8 /usr/bin/perl5.10.0 /usr/bin/perl site_lib is preserved after upgrade @INC

   gets longer and longer.

9. The awesomeness perl is very backward compatible Ideal for production

   keep upgrading perl is generally OK don’t necessarily have to upgrade cpan modules following a perl upgrade.

10. The huh CPAN modules are not necessarily backward compatible. XS

    modules might need to be recompiled with new perl Upgrading modules might not be avoidable.

11. The hmm The current CPAN architecture sort of encourages upgrading

    The default is to install the latest version of modules. Upgrading CPAN modules isn’t necessarily smooth.

12. The err Errors happens at runtime XS errors happens at

    install / compile time and it is ^%@&* to solve.

13. Worst of all Have to upgrade perl before doing all

    that. an all-in-ish move

14. Worst of all Dirty state 100 CPAN modules are updated

    1 failed Can’t easily revert

15. retreat cp /usr/bin/perl${old} /usr/bin/perl old perl does not contain new

    site_lib

16. But what if Upgrade perl for... performance bug-fixes evaluation

17. Practicals Module authors have to correctly specify module dependencies. Module

    users have to run tests in order to reveal runtime errors. assuming there are sufficient numbers of tests

18. !

19. perlbrew A tool to install different versions of perls

20. admin-free perl installation management

21. beer-driven software development

22. rvm 1.8, 1.9, ree, jruby, rubinus, macruby, maglev, ironruby

23. perlbrew 5.8, 5.9, 5.10, 5.11, 5.12, 5.13, 5.14, 5.15

24. Installation # 1 curl -kL http://xrl.us/perlbrewinstall | bash # 2

    cpan -i App::perlbrew perlbrew init

25. Usage perlbrew install perl-5.12.2 perlbrew install perl-5.13.5 perlbrew install perl-5.10.1

    perlbrew install perl-5.8.8 * Internet connection is required

26. Usage perlbrew use perl-5.14.2 perlbrew use perl-5.15.5 perlbrew switch perl-5.14.2

    perlbrew off

27. Usage perlbrew list

28. > perlbrew list perl-5.10.0 perl-5.10.1 perl-5.10.1 perl-5.12.3 perl-5.14.1 * perl-5.14.2

    perl-5.14.2@app-awesome perl-5.15.3

29. Usage perlbrew lib

30. Usage perlbrew lib list perlbrew lib create nobita perlbrew lib

    create perl-5.14.2@nobita perlbrew use perl-5.14.2@nobita perlbrew lib delete perl-5.12.3@nobita

31. cd ~/src/App-Awesome perlbrew use perl-5.10.1@app-awesome perlbrew use perl-5.14.2@app-awesome cd ~/src/Module-Awesome

    perlbrew use perl-5.10.1@nobita perlbrew use perl-5.14.1@nobita perlbrew use perl-5.14.2@nobita

32. perlbrew use perl-5.10.1@app-awesome

33. perlbrew use perl-5.10.1@app-awesome perl installation name

34. perlbrew use perl-5.10.1@app-awesome local::lib name

35. perlbrew use perl-5.10.1@app-awesome

36. eval `perl -Mlocal::lib=~/.perlbrew/ libs/perl-5.10.1@app-awesome/`

37. % perl -V ... Compiled at Sep 27 2011 14:08:36

    %ENV: PERL5LIB="/Users/gugod/.perlbrew/libs/perl-5.14.2@app-awesome/lib/perl5/darwin-2level:/ Users/gugod/.perlbrew/libs/perl-5.14.2@app-awesome/lib/perl5" PERLBREW_BASHRC_VERSION="0.30," PERLBREW_HOME="/Users/gugod/.perlbrew" PERLBREW_LIB="app-awesome" PERLBREW_PATH="/Users/gugod/.perlbrew/libs/perl-5.14.2@app-awesome/bin:/Users/gugod/ perl5/perlbrew/bin:/Users/gugod/perl5/perlbrew/perls/perl-5.14.2/bin" PERLBREW_PERL="perl-5.14.2" PERLBREW_ROOT="/Users/gugod/perl5/perlbrew" PERLBREW_VERSION="0.30" PERL_LOCAL_LIB_ROOT="/Users/gugod/.perlbrew/libs/perl-5.14.2@app-awesome" PERL_MB_OPT="--install_base /Users/gugod/.perlbrew/libs/perl-5.14.2@app-awesome" PERL_MM_OPT="INSTALL_BASE=/Users/gugod/.perlbrew/libs/perl-5.14.2@app-awesome" @INC: /Users/gugod/.perlbrew/libs/perl-5.14.2@app-awesome/lib/perl5/darwin-2level /Users/gugod/.perlbrew/libs/perl-5.14.2@app-awesome/lib/perl5 /Users/gugod/perl5/perlbrew/perls/perl-5.14.2/lib/site_perl/5.14.2/darwin-2level /Users/gugod/perl5/perlbrew/perls/perl-5.14.2/lib/site_perl/5.14.2 /Users/gugod/perl5/perlbrew/perls/perl-5.14.2/lib/5.14.2/darwin-2level /Users/gugod/perl5/perlbrew/perls/perl-5.14.2/lib/5.14.2

38. perlbrew.pl 0.30

39. Properties isolated perl installations bin, site_lib, local::lib install a new

    version ≠ upgrade @INC does not include old site_lib

40. Benefits `sudo cpan` is no more easier-to-clean perl environments Nuke

    the whole thing to clean the mess No old @INC

41. Benefits per-app isolated perl environments setup. avoid, in advance, any

    possible incompatible issues with other apps. know your libs

42. avoid lib conflicts with what you had install older versions

    of modules without worries to break other app code. cpanm http://URL.TO/Mo-0.1.tar.gz App::pmuninstall Benefits

43. Rationale Don’t mess up vendor perl too much. Learn new

    stuffs in the dev version of perl. keep up with the fashion

44. Rationale Test modules or apps ... with newer perl ...

    with older perl

45. Rationale Test perl itself -Dusethreads -Duse64bitall -Duse64bitint Configure -h -D

    -U -A

46. Rationale spare some guts B, XS Better with a perl

    built with DEBUGGING

47. Thoughts perlbrew « cpanm, ack, rvm

48. Thoughts One standalone program embed non-core modules very easy distribution

    runs a tiny bit faster

49. Thoughts rvm bash programming master-piece developer-friendly experiences production uses

50. Further Thoughts Deprecate switch/use to external perl Improve multi-user scenario

    More related tool to help developer identify module upgrade failure, and revert to a good state.

51. Further Thoughts Good + Simple toolkit Keep new-comers by not

    frustrating them Grow the community

52. Simple is Hard

53. Development http://github.com/gugod/App-perlbrew 49 contributors Feedback github issue / pull requests

    rt.cpan.org #perlbrew on twitter

54. Development http://perlbrew.pl Documentation / Updates A static version of github

    Wiki

55. Thank You