如何使用 Ruby-Rails 删除文件夹的所有内容？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/8538427/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to delete all contents of a folder with Ruby-Rails?
提问by Jacob
I have a public/cachefolder which has files and folders. How can I completely empty that folder using a rake task?
我有一个public/cache文件夹，里面有文件和文件夹。如何使用 rake 任务完全清空该文件夹？
回答by Marek P?íhoda
Ruby has the *nix rm -rfequivalent in the FileUtilsmodule that you can use to delete both files and non-empty folders/directories:
Rubyrm -rf在FileUtils模块中具有 *nix等效项，您可以使用它来删除文件和非空文件夹/目录：
FileUtils.rm_rf('dir/to/remove')
To keep the directory itself and only remove its contents:
要保留目录本身并仅删除其内容：
FileUtils.rm_rf(Dir.glob('dir/to/remove/*'))
FileUtils.rm_rf(Dir['dir/to/remove/*']) # shorter version of above
回答by James Watkins
You can run arbitrary commands using the tilted single-quote (next to the tilde) like so:
您可以使用倾斜的单引号（在波浪号旁边）运行任意命令，如下所示：
`rm -fr public/cache/*`
This may be more platform-dependent than what you want, but it opens up a lot of possibilities.
这可能比您想要的更依赖于平台，但它开辟了很多可能性。
回答by Gabe Kopley
Great answers here already. You might also be interested to know that Rails 5 has a rake task to do this built-in:
这里已经有了很好的答案。您可能还想知道 Rails 5 有一个内置的 rake 任务来执行此操作：
rake tmp:cache:clear # Clear cache files from tmp/
