1.
Modern Perl for the
Unfrozen Paleolithic
Perl Programmer
John SJ Anderson ⭐︎ Infinity Interactive ⭐︎ @genehack
Pittsburgh Perl Workshop 2015 ⭐︎ 11 Oct 2015

2.
I'M JUST A CAVEMAN
DERN PERL FRIGHTENS AND CON

3.
Quite a few
things have
changed...

4.
...but many
haven't

5.
You're just in time
for the Perl6
release party

6.
We're still
using Perl5!

7.
Many
language
improvements

8.
defined($this) ? $this : $that
defined-or

9.
$this // $that
defined-or

10.
subroutine
signatures

11.
sub add ($one, $two) {
return $one + $two;
}

12.
new tools

13.
"system" perl:

14.
"system" perl:
just say no

15.
/usr/bin/perl

16.
/usr/bin/perl

17.
perlbrew.pl

18.
https://github.com/tokuhirom/plenv

19.
advantages
• Solves "vendor Perl lockin" issues
• Install multiple Perls in your home directory
• ... or elsewhere
• Trivially switch from Perl version to Perl version
• Able to install modules without special permissions
• Easy to stay up to date with Perl development

20.
plenv > perlbrew
• Less magic messing around with PATH
• Can "pin" Perl different ways: globally, per-shell, or
per-directory

21.
perlbrew > plenv
• Kickass website

22.
ing of installing in your $H

23.
local::lib

24.
local::lib
• Install your own copies of modules
• In your $HOME (so no special permissions needed)
• Can also install per-project modules
• Integrates well with other tools

25.
speaking of installing stuff…

26.
cpanminus
cpanm

27.
% cpan Git::Wrapper
CPAN: Storable loaded ok (v2.54)
Reading '/Users/genehack/.cpan/Metadata'
Database was generated on Sat, 10 Oct 2015 01:17:02 GMT
Running install for module 'Git::Wrapper'
CPAN: LWP::UserAgent loaded ok (v6.13)
Fetching with LWP:
http://cpan.schatt.com/authors/id/G/GE/GENEHACK/Git-Wrapper-0.045.tar.gz
CPAN: YAML loaded ok (v1.15)
CPAN: Digest::SHA loaded ok (v5.95)
Fetching with LWP:
http://cpan.schatt.com/authors/id/G/GE/GENEHACK/CHECKSUMS
CPAN: Compress::Zlib loaded ok (v2.068)
Checksum for /Users/genehack/.cpan/sources/authors/id/G/GE/GENEHACK/Git-Wrapper-
0.045.tar.gz ok
tmp-47326 for tmp-47326: No such file or directory at
/opt/plenv/versions/5.23.2/lib/perl5/5.23.2/CPAN/Distribution
.pm line 468.
CPAN: File::Temp loaded ok (v0.2304)
CPAN: CPAN::Meta::Requirements loaded ok (v2.133)
CPAN: Parse::CPAN::Meta loaded ok (v1.4417)
CPAN: CPAN::Meta loaded ok (v2.150005)
CPAN: Module::CoreList loaded ok (v5.20150820)
Configuring G/GE/GENEHACK/Git-Wrapper-0.045.tar.gz with Makefile.PL
Locating bin:git... found at /opt/git/bin/git.
Checking if your kit is complete...
Looks good
Generating a Unix-style Makefile
Writing Makefile for Git::Wrapper
Writing MYMETA.yml and MYMETA.json

28.
GENEHACK/Git-Wrapper-0.045.tar.gz
[17/1516]
/opt/plenv/versions/5.23.2/bin/perl5.23.2 Makefile.PL -- OK
Running make for G/GE/GENEHACK/Git-Wrapper-0.045.tar.gz
cp lib/Git/Wrapper/File/RawModification.pm blib/lib/Git/Wrapper/File/RawModification.pm
cp lib/Git/Wrapper.pm blib/lib/Git/Wrapper.pm
cp lib/Git/Wrapper/Statuses.pm blib/lib/Git/Wrapper/Statuses.pm
cp lib/Git/Wrapper/Exception.pm blib/lib/Git/Wrapper/Exception.pm
cp lib/Git/Wrapper/Log.pm blib/lib/Git/Wrapper/Log.pm
cp lib/Git/Wrapper/Status.pm blib/lib/Git/Wrapper/Status.pm
Manifying 6 pod documents
GENEHACK/Git-Wrapper-0.045.tar.gz
/usr/bin/make -- OK
Running make test
PERL_DL_NONLAZY=1 "/opt/plenv/versions/5.23.2/bin/perl5.23.2" "-MExtUtils::Command::MM" "-
MTest::Harness" "-e" "und
ef *Test::Harness::Switches; test_harness(0, 'blib/lib', 'blib/arch')" t/*.t
t/00-load.t ............... 1/6 # Testing Git::Wrapper 0.045
t/00-load.t ............... ok
t/author-err.t ............ skipped: these tests are for testing by the author
t/basic.t ................. # Testing git version: 2.5.2
t/basic.t ................. ok
t/git_binary.t ............ ok
t/parse_args.t ............ ok
t/path_class.t ............ # Testing git version: 2.5.2
t/path_class.t ............ ok
t/release-pod-coverage.t .. skipped: these tests are for release candidate testing
t/release-pod-syntax.t .... skipped: these tests are for release candidate testing
All tests successful.
Files=8, Tests=67, 1 wallclock secs ( 0.04 usr 0.02 sys + 0.39 cusr 0.31 csys = 0.76 CPU)
Result: PASS
GENEHACK/Git-Wrapper-0.045.tar.gz

29.
(still not done
but I got tired
of pasting.)

30.
% cpanm Git::Wrapper
--> Working on Git::Wrapper
Fetching http://www.cpan.org/authors/id/G/GE/GENEHACK/Git-Wrapper-0.045.tar.gz ... OK
Configuring Git-Wrapper-0.045 ... OK
Building and testing Git-Wrapper-0.045 ... OK
Successfully installed Git-Wrapper-0.045

31.
speaking of stuff on CPAN…

32.
https://metacpan.org/

33.
search.cpan.org

34.
https://metacpan.org/

35.
https://metacpan.org/

36.
https://github.com/CPAN-API/metacpan-web

37.
Duck Duck Go

38.
Duck Duck Go

39.
speaking of modules...

40.
JSON::MaybeXS

41.
CGI.pm
is
gone

42.
(not really)

43.
speaking of Perl websites…

44.
http://cpanratings.perl.org/

45.
http://cpanratings.perl.org/

46.
https://metacpan.org/

47.
http://cpants.cpanauthors.org/

48.
http://cpants.cpanauthors.org/

49.
https://metacpan.org/

50.
http://prepan.org/

51.
g of staying up to date on Perl

52.
http://perlweekly.com/

53.
http://blogs.perl.org/users/sawyer_x/

54.
speaking of
retrospectives…

55.
questions?