February 2014
Intermediate to advanced
248 pages
4h 23m
Japanese
Content preview from 実践 Vagrant
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124
7 章 プラグインによる Vagrant の拡張
module MyVagrantPlugin
class Plugin < Vagrant.plugin("2")
name "my vagrant plugin"
command "free-memory" do
require_relative "my_vagrant_plugin/command"
Command
end
end
end
command
メソッドは、新しいコマンドコンポーネントをプラグインで定義するため
に使われます。これは単純なメソッドで、コマンド名を唯一のパラメータとして取り
ます。この例では、このコマンドが最終的に実装できれば、
vagrant free-memory
と
して使えるようになります。
コンポーネントへのブロック引数は、コマンドの実装を含むファイルをロードし、
実際の実装クラスを返します。
7.5.2
実装
コマンドの実装クラスは、
Vagrant.plugin(
“
2
”
,
“
command
”
)
を継承していま
す。これは、バージョン
2
のプラグイン
API
のためのコマンドの適切なスーパーク
ラスを返す、特別なメソッドです。
このクラスを継承すれば、コマンドの実装はとても簡単です。コマンドに実装しな
ければならないメソッドは、
execute
というメソッドだけです。このメソッドはコマ
ンドを実行し、そのコマンドの終了ステータスを返します。
free-memory
コマンドの初期の実装を以下に示します。この時点では、このプラグ
インは何も役に立つことをしていないので、注意してください。それはこの後すぐに ...
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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.