ruby - 在 irb 中重新加载 ruby​​gems？

Question

我现在有这个脚本。

def r(this)
  require this
  puts "#{this} is now loaded."
rescue LoadError
  puts "The gem '#{this}' is missing."
  puts "Should I install it? [y/n]"
  data = gets
  if data =~ /yes|y/i
    puts "Installing #{this}, hold on."
    if `gem install #{this}` =~ /Successfully/i
      load this
    end
  else
    puts "Okey, goodbye."
  end
end

这使得即时请求库成为可能。像这样:r "haml"。

问题是 gem 安装后无法加载。使用 load this 或 load File.expand_path("~/.irbrc") 不起作用。

这是一个例子。

>> r "absolutize"
The gem 'absolutize' is missing.
Should I install it? [y/n]
y
Installing absolutize, hold on
LoadError: no such file to load -- absolutize
>> require "absolutize"
LoadError: no such file to load -- absolutize
>> exit
$ irb
>> require "absolutize"
=> true

有没有办法即时重新加载 ruby​​gems 或 irb？

Answer 1

我没试过，但我想你可能正在寻找 Gem.clear_paths

Reset the dir and path values. The next time dir or path is requested, the values will be calculated from scratch. This is mainly used by the unit tests to provide test isolation.