Rubygems：指定对最新版本的gem的依赖 [英] Rubygems: specify dependency on the latest version of a gem

问题描述

我正在开发一个取决于另一个gem B的gem A.我需要我的gem用户拥有最新版本的B，不管它是什么。所以我想在我的gemspec中说一些类似于

  spec.add_dependencyB，：latest 
 
 code> 

原因是B包含一个数据库驱动程序，它需要使用最新版本，否则数据库会拒绝连接。 / p>



换句话说，我需要在使用我的gem之前强制 gem update 。有没有办法如何在gemspec中做到这一点？

我知道我可以指定版本大于或小于某个固定版本，但这不是我想要的。

另外我可以从git中获取宝石代码 - 但从master分支中获取它通常与将最新的stable版本推送到rubygems不同。 / p>

解决方案

这样的事情如何：

  require'json'
 require'uri'
 require'open-uri'
 
 nokogiri_uri = URI（'https://rubygems.org/api/v1 /gems/nokogiri.json'）
 
 version = nil 
 
 open（nokogiri_uri）do | f | 
 json_str = f.read 
 puts json_str 
 $ b $ hash = JSON.parse json_str 
 version = hash ['version'] 
 puts version 
结束
 
如果版本
 spec.add_dependencynokogiri，版本
 else 
 puts我的宝石将无法工作，因为它的依赖关系是错误的。 
 $ b  - 输出： -  
 {name：nokogiri，downloads：33177312，version：1.6.6.2，...} 
 1.6.6.2 
  

我用 open-uri 而不是 net / http 库，因为文章如何解决Net :: HTTP的危险默认HTTPS行为。我不知道在最新版本的ruby中是否解决了这个问题。

I'm developing a gem A that depends on another gem B. I need the user of my gem to have the latest version of B whatever it is. So I would like to say in my gemspec something like

spec.add_dependency "B", :latest

The reason for this is that B contains a database driver that needs to be in its latest version otherwise the database rejects the connection.

So in other words I need to force gem update before my gem is used. Is there a way how to do this in gemspec?

I know I can specify the version to be greater or smaller then some fixed version, but that's not what I want.

Also I can take the gem code from git - but taking it from master branch usually isn't the same as taking the latest "stable" version pushed to rubygems.

解决方案

How about something like this:

require 'json'
require 'uri'
require 'open-uri'

nokogiri_uri = URI('https://rubygems.org/api/v1/gems/nokogiri.json')

version = nil

open(nokogiri_uri) do |f|
  json_str = f.read
  puts json_str

  hash = JSON.parse json_str
  version = hash['version']
  puts version
end

if version
  spec.add_dependency "nokogiri", version
else
  puts "My gem won't work because its dependencies are buggered."

--output:--
{"name":"nokogiri","downloads":33177312,"version":"1.6.6.2", ... }
1.6.6.2

I used open-uri instead of the net/http library because of the article How to Cure Net::HTTP’s Risky Default HTTPS Behavior. I don't know if that concern has been addressed in the latest versions of ruby.

这篇关于Rubygems：指定对最新版本的gem的依赖的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！