如何使用go get导入特定版本的软件包？ [英] How do I import a specific version of a package using go get?

问题描述

来自 Node 环境我用来将特定版本的vendor lib安装到项目文件夹中（ node_modules ）通过告诉 npm 从 package.json 甚至直接从控制台安装该版本的lib，像这样：

  $ npm install express@4.0.0 
  

然后我用我的项目导入那个版本的软件包：

  var express = require（'express'）; 
  

现在，我想用 go 。我怎样才能做到这一点？
是否可以安装特定版本的软件包？如果是这样，使用集中的 $ GOPATH ，我如何导入一个版本而不是另一个版本？

我会做像这样：

  $ go get github.com/wilk/uuid@0.0.1 
 $ go get github .com / wilk / uuid @ 0.0.2 
  

但是，如何才能在导入？

解决方案

真的很惊讶没有人提到 gopkg.in 。

gopkg.in是一种提供封装（重定向）的服务，可让您将版本表达为回购网址，而无需实际创建回购网站。例如gopkg.in/yaml.v1 vs gopkg.in/yaml.v2，即使它们都住在 https://github.com / go-yaml / yaml

• gopkg.in/yaml.v1重定向到https://github.com/go-yaml/yaml/tree/v1


• gopkg.in /yaml.v2重定向到 https://github.com/go-yaml/yaml/tree/v2

如果作者没有遵循正确的版本管理规范（通过在向后兼容性时增加版本号），这并不完美。但它可以与分支和标签一起工作。

coming from a Node environment I used to install a specific version of a vendor lib into the project folder (node_modules) by telling npm to install that version of that lib from the package.json or even directly from the console, like so:

$ npm install express@4.0.0

Then I used to import that version of that package in my project just with:

var express = require('express');

Now, I want to do the same thing with go. How can I do that? Is it possible to install a specific version of a package? If so, using a centralized $GOPATH, how can I import one version instead of another?

I would do something like this:

$ go get github.com/wilk/uuid@0.0.1
$ go get github.com/wilk/uuid@0.0.2

But then, how can I make a difference during the import?

解决方案

Really surprised nobody has mentioned gopkg.in.

gopkg.in is a service that provides a wrapper (redirect) that lets you express versions as repo urls, without actually creating repos. eg gopkg.in/yaml.v1 vs gopkg.in/yaml.v2, even though they both live at https://github.com/go-yaml/yaml

• gopkg.in/yaml.v1 redirects to https://github.com/go-yaml/yaml/tree/v1
• gopkg.in/yaml.v2 redirects to https://github.com/go-yaml/yaml/tree/v2

This isn't perfect if the author is not following proper versioning practices (by incrementing the version number when breaking backwards compatibility), but it does work with branches and tags.

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