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

这使得可以动态地需要库。像这样：r "haml"。

问题是我无法在安装后加载gem。使用load this或load File.expand_path("~/.irbrc")无效。

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

有没有办法在飞行中重新加载rubygems或irb？

Answer 1

我没有尝试，但我认为您可能正在寻找Gem.clear_paths

重置目录和路径值。下次请求目录或路径时，将从头开始计算值。这主要用于单元测试以提供测试隔离。

Answer 2

您可以致电exec('irb')

重置irb

Answer 3

只需从'$“'中删除该文件：

require 'erb' # Loaded.
require 'erb' # Does nothing.
$".delete_if {|e| e =~ /erb\.(?:rb|so)/} # Remove "erb" from loaded libraies.
require 'erb' # Reloaded (with warnings if the first require was successful).

请参阅http://www.zenspider.com/Languages/Ruby/QuickRef.html#19

在irb中重新加载rubygems？

3 个答案: