Tatsuhiko Miyagawa's blog

Dependencies can be declared using cpanfile and frozen with carton install. The buildpack will install these dependencies using Carton into a cached ./local directory.

I implemented the experimental buildpack update to enable Carton and perl versions support.

This enables the use of Carton (dev release on v0.9) to deploy dependencies recorded in carton.lock (you have to check it in to the git repo), and then use the file .perl-version ala plenv to specify the perl runtime version. Only the latest minor point release of all stable releases are supported. See the README for details.

This has been one of my TODOs to make this buildpack actually usable on Heroku, since otherwise a) installation will use the latest cpan modules from CPAN unless you explicitly specify version in cpanfile (which is great) and b) the perl used to run your application is always /usr/bin/perl version 5.10 that comes with whatever OS that runs on Heroku.

I tried to use vulcan to build binaries on Heroku, but it looks a little complicated and requires setting up Heroku addons. I went with the simplest technique to run perl-build on heroku run bash like explained in this article, then scp back the resulting binary to my host.

This makes the perl buildpack runs more like other languages buildpack like Ruby and NodeJS.

Note that I consider this a beta, and you have to specify the git branch #carton in the buildpack URL to use it.

The initial deployment takes a little while to copy vendor perl, then bootstrap all dependencies for carton - which i hope can be eliminated once carton goes 1.0 and support fatpacked executable.

Thanks to @judofyr for his also excellent perloku buildpack that i shamelessly copied the technique to build & download perl binaries.

This eliminates the XS dependency in Plack.

Plack-1.0026-TRIAL is on CPAN, which is a big release that eliminated a dependency for the big LWP module.

LWP not only has a big chain of dependencies since the distribution split earlier, it also has XS dependency (HTML::Parser) in the chain, which makes Plack code non-trivial to install on environments without a C compiler, and makes fatpacking difficult (although realistically, these C bits are only necessary for testing and not required mostly on the runtime).

This is a big shift - I made LWP optional in #408 but also replaced the use of LWP with HTTP::Tiny in #410 - so that Plack::Test::Suite (reference Test suite for PSGI handlers) and ::Server (Plack::Test implementation to run tests through live server) now uses HTTP::Tiny instead of LWP. The test interface is still the same, and you can use HTTP::Request/Response interface for that, which is a much smaller subset of LWP.

I tested various distributions where it implicitly expects LWP when depending on Plack, and fixed a lot of them, and sent pull requests where needed. Please test Plack-1.0026-TRIAL against your application/frameworks/server implementations.

cpanm --dev Plack

bulknews-podcast:

収録時間 46:55 | Download MP3 (26MB)

Kenn Ejima さん (@kenn), Hakuro Matsuda さん (@hak) を迎えて、Apple WWDC 2013 Keynote, iOS 7, OS X Mavericks, Mac Pro, Macbook Air などについて話しました。

３人収録にも慣れてきたこの頃、おなじみの kenn と、hakuro さんを迎えて WWDC 話です。収録ではさらっと流しているというか触れてもいませんが、hakuro さんは元 Apple で iOS のエンジニアリングをしていたこともあり、なかなか濃い話ができました。

ちなみにゲスト２人の場合、個人的には話すネタに困ることが少ないので事前の準備は楽だったりしますね。オーディオ漏れが起こりやすかったり、ぶつかることも結構あるので 編集が割と大変 だったりしますが、だいたい収録時間 x 3 ぐらいで作業できるようになってきました。

I want to take a moment to discuss what this means, why I suggested it, and what I think Module::Build trail blazed for Perl 5.

Great post (as always) by David Golden about what Module::Build pioneered since 2001 to make the Perl toolchain ecosystem better.

Few things to add:

So… the biggest impact on end-users will be that when Perl 5 version 20 is released in Q2 2014, people will have to install Module::Build from CPAN to squelch the deprecation warning.

This is usually automatic, since major CPAN clients figure out whether the module loaded from perl core lib dir is marked deprecated, and in that case it automatically reinstalls it from CPAN, and the deprecation warning will go away.

If you had a subclass to do one thing and I had a subclass that did something else and you wanted to combine them, you pretty much had to copy and paste code.

I should point out there’s a work to combat this problem: Module::Build::Pluggable by tokuhirom. But I should also note that tokuhirom and I eventually agreed that most of the authoring side work should be done by the author tools, hence we are now working on Milla and Minilla - it’s no coincidence we have similar names.

bulknews-podcast:

牧大輔さん (@lestrrat), Tokuhiro Matsuno さん (@tokuhirom) を迎えて、Perl 5.18, YAPC::Asia などについて話しました。

bulknews-podcast:

収録時間 46:22 | Download MP3 (26MB)

Kenn Ejima さん (@kenn), Motohiro Takayama さん (@mootoh) を迎えて、Google I/O, Google Glass, Google Play Game Services などについて話しました。

番組へのフィードバックは Twitter にて @miyagawa またはハッシュタグ #bulknews にてお寄せください。

Show Notes

• Google IO
• The best of Google I/O 2013…

2週間で3エピソードとちょっと飛ばし気味ですが、時事ネタということでGoogle I/O 話。翌日でキーノートちょっと忘れてますが、参加してたmootohさんのおかげでいろいろ拾えましたね。後半の Game Services 話は業界トークっぽくて面白かったです。

録音しながらライブストリーミングもしてみたんですが、時間帯の関係もあってフィードバックをもらうのが難しかったですね。twitter 以外にも Lingr とかのほうがエンゲージしやすいのかな。いろいろ試行錯誤してみる必要ありですね。

bulknews-podcast:

Kenta Murataさん (@mrkn), Ryo Nakamuraさん (@r7kamura) を迎えて、RailsConf, Ruby 2.0, Rails 4, Chanko 2.0, RubyKaigi, YAPC などについて話しました。

今週は日本語営業に戻って、mrkn, r7akamura とRuby 話をしました。ちなみに３人の収録だと間が持ちやすくていいんですが、編集がちょっと大変。

Rails 2.3 is Kansas

DHH の Kansas ネタはConfreaksにKeynoteが上がってました。13分あたり。hkmurakami さんが 詳しく解説 してくれてます。日本の2ch でよくでる群馬県ネタ に近いものがありますね。

bulknews-podcast:

On the episode 9 of my podcast, featuring Jesse Vincent (@obra), we discussed his recent experiments to build his own keyboard.

Some of my followers on Twitter and friends on Facebook asked if there was any plan for an English episode of my podcast.

So here it is, with Jesse Vincent, we talked about his recent exploration of making his own Keyboard. We also discussed little bit about perl, and OSDC.TW, the conference we just attended a couple of weeks ago.

Might want to do more of English episodes in the future, but comments and feedback is always appreciated.