ruby - 如何在 Ruby 中使用 '~' 指定文件路径？

Question

如果我这样做:

require 'inifile'

# read an existing file
file = IniFile.load('~/.config')
data = file['profile'] # error here

puts data['region']

这里出现错误:

t.rb:6:in `<main>': undefined method `[]' for nil:NilClass (NoMethodError)

如果我指定绝对路径，它就会消失:

file = IniFile.load('/User/demo1/.config')

但我不想对位置进行硬编码。如何将 ~ 解析为 Ruby 中的路径？

Answer 1

对于这种情况，Ruby 有一个方法。是File::expand_path .

Converts a pathname to an absolute pathname. Relative paths are referenced from the current working directory of the process unless dir_string is given, in which case it will be used as the starting point. The given pathname may start with a “~”, which expands to the process owner’s home directory (the environment variable HOME must be set correctly). “~user” expands to the named user’s home directory.

require 'inifile'

# read an existing file
file = IniFile.load(File.expand_path('~/.config'))