February 2014
Intermediate to advanced
248 pages
4h 23m
Japanese
Content preview from 実践 Vagrant
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7.6 新しい設定オプションの追加
このコンポーネントのブロック引数は、設定の実装が含まれているファイルをロー
ドし、実際の実装クラスを返します。
このセクションが終われば、以下のような
Vagrantfile
を書くことができます。
Vagrant.configure("2") do |config|
# ...
config.my_key.value = 12
end
7.6.2
実装
設定の実装クラスは、
Vagrant.plugin(
“
2
”
,
“
config
”
)
を継承します。これは、
プラグイン
API
のバージョン
2
の設定の適切なスーパークラスを返す、特別なメソッ
ドです。
このクラスを継承したあとの設定キーの実装は、属性へのアクセッサを持つ普通の
Ruby
のオブジェクトによく似ています。
ここでは、まず、何らかの数値を取るオプションの「値」の追跡から始めましょ
う。この設定キーの最初の実装は、以下のようになります。
module MyVagrantPlugin
class Config < Vagrant.plugin("2", "config")
attr_accessor :value
end
end
これ以上簡単になりようがありません！ これだけで、
Vagrantfile
には
config.
my_key.value
への参照を置けるようになります。この作業の結果を確認するには、
プラグインの作業環境の
Vagrantfile
を修正して、値を設定してみます。
Vagrant.require_plugin ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.