find the root directory of a file in ruby

To get the root directory of a file in Ruby, you can use the File.expand_path method along with the File.dirname method.

Here's an example:

main.rb
file_path = "/path/to/your/file.txt"
root_dir = File.expand_path(File.dirname(file_path))

puts root_dir
105 chars
5 lines

This will output the root directory of the file:

main.rb
/path/to/your
14 chars
2 lines

Explanation:

• File.dirname method returns the directory component of the file path.
• File.expand_path method converts a relative path to an absolute path.
• By combining both methods, we get the absolute path of the directory that contains the file.

Note: The root directory of a file is defined as the parent directory that contains all other directories and files. This is typically the top-level directory of a file system, such as / on Unix-like systems.