在 irb 中重新加载 rubygems？

发布于 2024-11-03 19:31:55 字数 917 浏览 0 评论 0原文

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

这使得动态需要库成为可能。像这样：r“haml”。

问题是安装后我无法加载gem。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 rubygems 或 irb？

原文

I've this script right now.

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

That makes it possible to require libs on the fly.
Like this: r "haml".

The problem is that I can't load the gem after it has been installed.
Using load this or load File.expand_path("~/.irbrc") does not work.

Here is an example.

>> 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

Is there a way to reload rubygems or irb on the fly?

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深海里的那抹蓝 2024-11-10 19:31:55

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 dir 或 path 时，将从头开始计算这些值。这主要由单元测试用来提供测试隔离。

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绅士风度i 2024-11-10 19:31:55

您可以通过调用exec('irb')重置irb

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心房的律动 2024-11-10 19:31:55

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

Just remove the file from ´$"´:

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).

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

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