bundle.setup 和 bundle.require 有什么区别 [英] what's the difference between bundle.setup and bundle.require

问题描述

从gemfile 手册页，我了解到有两种方法可以导入您在 Gemfile 中指定的 gem.bundle.setup 将安装程序将 gem 添加到 Ruby 的加载路径"，而 bundle.require 将需要所有 gem.

From the gemfile man page, I learned there are two ways to import the gems you specified in the Gemfile. The bundle.setup will "setup adds gems to Ruby's load path" while bundle.require will require all the gems.

这两种方法有什么区别?我应该在什么情况下使用其中之一?

What's the difference between these two methods? In which condition should I use one of them?

推荐答案

Bundler.setup 修改了 LOAD_PATH，所以你可以做像 require 'some_gem' 这样的事情将工作.它允许您手动"要求宝石.在 Bundler 之前，使用 Rubygems，您将获得与 require 'rubygems' 相同的效果.

Bundler.setup modifies the LOAD_PATH, so you can do things like require 'some_gem' and they will work. It allows you to require gems 'by hand'. Before Bundler, using Rubygems, you would achieve much of the same effect doing require 'rubygems'.

Bundler.require(:default) 实际上需要 Gemfile 中的所有 gem(假设您没有使用组；否则，如果您提供参数，它需要指定组中的那些).它是一堆 require 'some_gem' 语句的简写.

Bundler.require(:default) on the other hand actually requires all the gems in the Gemfile (assuming you're not using groups; otherwise it requires those in the specified groups if you provide arguments). It is a shorthand for a bunch of require 'some_gem' statements.

请参阅 http://gembundler.com/rationale.html.请注意，他们说您必须在执行 Bundler.require 之前执行 require 'bundler/setup'，但实际上这通常不是必需的.我几乎从不使用 Bundler.setup(或 require 'bundler/setup)，因为我需要通过 Bundler.require 的所有 gem).

See http://gembundler.com/rationale.html. Note that they say you have to do require 'bundler/setup' before doing Bundler.require, but in practice this usually is not necessary. I almost never use Bundler.setup (or require 'bundler/setup), because I require all gems via Bundler.require).

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