本文介绍了捆绑软件可以告诉我Gemfile中的哪些宝石具有更新的版本（例如，试运行的捆绑软件更新）的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
有没有办法在假装模式下运行
Is there a way to run bundle update in pretend mode, similar to the -p (pretend) flag for Rails generators or cap's -n (dry-run) flag?
我想像这样的东西：
$> bundle update -p
Fetching source index for http://rubygems.org/
The following gems have updated versions:
...
list of gems
...
推荐答案
Bundler 1.1引入了新的过时功能，这正是我想要的。 Pat Shaughnessy具有出色的有关新功能的信息。用他的话说，捆绑包已过期：
Bundler 1.1 introduced a new 'outdated' feature, which is exactly what I was looking for. Pat Shaughnessy has a great write-up on the new features. In his words, bundle outdated:
快速查看需要更新的宝石，而无需实际修改源宝石和本地宝石。谢谢邦德勒！
This should make it a snap to see what gems are due for an update without actually modifying your source and local gems. Thanks Bundler!
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