仅限桶装自制配方奶粉 [英] Keg-only homebrew formulas

问题描述

今天我通过homebrew安装了curl公式，但是在安装它(并重新购买外壳程序)之后，我注意到了:

Today I installed the curl formula via homebrew, but after installing it (and re-sourcing the shell) i noticed that :

% which curl 
/usr/bin/curl

实际上，

的输出brew install curl表示这是一个 kung-only 公式，并且由于curl已经存在于OS X中，因此没有链接放入Homebrew前缀中，因为这可能会导致未指定的问题.

as a matter of fact, the output of brew install curl stated that it was a keg-only formula, and that since curl was already present in OS X, it didn't link it into Homebrew prefix, as that could cause unspecified problems.

然后继续说明

通常，这对您没有影响

Generally there are no consequences of this for you

我想知道:

• 究竟是什么样的问题?
• 通过Homebrew安装仅桶装公式的目的是什么?如果新安装的工具不在PATH中，怎么会有后果?

• What sorts of problems exactly?
• What is the purpose of installing keg-only formulas via Homebrew? How can there be no consequences if the newly installed tool is not in the PATH?

推荐答案

• 问题:如果将自制程序放置在默认OS X版本之前，则可能确实发生任何事情.最常见的问题是由两个版本中可用的命令行选项集之间的差异或选项含义的差异引起的.对于卷曲，后果可能不会那么糟，但是对于其他应用程序，您可能在最坏的情况下破坏操作系统.
• 仅适用于桶装:现在您有了两个版本的curl！默认的OS X和自制软件.如果要使用默认设置中未包含的功能，可以通过显式调用Homebrew curl来使用.确切的路径取决于您如何设置自制软件.因为新安装的版本不在路径中，所以除非明确调用它，否则不太可能引起问题.
• Problems: if a homebrew application is put in the path in front of the default OS X version of the same, really anything might happen. Most common issues are caused by differences between the set of command line options available in the two versions, or differences in the meaning of the options. For curl the consequences might not be so bad, but for other applications you could, at worst, break the OS.
• Keg-only: now you have two versions of curl! The default OS X, and the homebrew. If you want to use features that are not in the default but in the homebrew, you can do so by calling the homebrew curl explicitly. The precise path depends on how you've got homebrew set up. Because the newly installed version is not in the path, its unlikely to cause a problem unless it is explicitly called.

这篇关于仅限桶装自制配方奶粉的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！