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  <author_name>onk</author_name>
  <author_url>https://blog.hatena.ne.jp/onk/</author_url>
  <blog_title>id:onk のはてなブログ</blog_title>
  <blog_url>https://onk.hatenablog.jp/</blog_url>
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  <description>Gemfile 内で切り替える こういう ENV で切り替えるやつとか、eval_gemfile を使うやつとか。 https://github.com/discourse/discourse/blob/v2.6.2/Gemfile#L9-L16 def rails_master? ENV[&quot;RAILS_MASTER&quot;] == '1' end if rails_master? gem 'arel', git: 'https://github.com/rails/arel.git' gem 'rails', git: 'https://github.com/rails/rails.git' el…</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2021-03-01 00:42:28</published>
  <title>Gemfile の Dual Boot 方法</title>
  <type>rich</type>
  <url>https://onk.hatenablog.jp/entry/2021/03/01/004228</url>
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