安装homebrew时出现“Undefined method '<'”错误

Question

我想在我的Macbook Pro上安装homebrew，以便能够运行NINJA-IDE，但每次执行网站上给出的代码时，都会出现以下错误：

Joshs-MacBook-Pro:~ joshua$ ruby -e "$(curl -fsSL https://raw.github.com/mxcl/homebrew/go)"
==> This script will install:
/usr/local/bin/brew
/usr/local/Library/...
/usr/local/share/man/man1/brew.1
==> The following directories will be made group writable:
/usr/local/share
==> The following directories will have their group set to admin:
/usr/local/share

Press ENTER to continue or any other key to abort
==> /usr/bin/sudo /bin/chmod g+rwx /usr/local/share
Password:
==> /usr/bin/sudo /usr/bin/chgrp admin /usr/local/share
==> Downloading and Installing Homebrew...


Agreeing to the Xcode/iOS license requires admin privileges, please re-run as root via sudo.


-e:84:in `git': undefined method `<' for nil:NilClass (NoMethodError)
    from -e:153:in `block in <main>'
    from -e:152:in `chdir'
    from -e:152:in `<main>'
Joshs-MacBook-Pro:~ joshua$

我已经彻底研究了“通过sudo以root身份重新运行”的一行，但没有找到答案，因此我认为问题出在我不停看到的NoMethodError上。如果能帮忙解决这个问题，将不胜感激！

- Josh Spern

Answer 1

如果您尚未安装，请通过App Store安装XCode。然后运行它，并通过GUI接受许可证。现在再次运行Homebrew安装脚本。这样对我来说解决了问题。

- Richard Kuo

Answer 2

刚刚安装了最新版本的XCode并从未打开过。结果发现在运行Homebrew脚本之前必须同意许可协议。只需单独运行XCode并同意许可协议即可解决问题。

- Nariman

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这也可以在终端中通过运行以下命令行来完成： sudo xcrun cc - Etienne

@Etienne 很好！谢谢！ - Nariman