dsmvovm27249 2019-05-24 09:59
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如何知道从哪里获取软件包

When I import a package in a go application (using modules and vscode with golang plugin): 

import (
   cors "goa.design/plugins/cors/dsl"
)

go automatically retrieves the package. How does go know where to get it from? I figured it simply pulls the sources from github.com, but the repository for this project is at https://github.com/goadesign/goa no . in the name. And if I change the import to: 

import (
   cors "goa.design/plugins/v3/cors/dsl"
)

It retrieves the v3 package. I would gladly RTFM, but not sure which FM I need to read.

Btw: this is my second day on go so this is magic to me.

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  • douhui2307 2019-05-24 10:08
    关注

    It's simple, check it out:

    $> curl https://goa.design/plugins/cors/dsl
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en-us">
<head>
  <meta http-equiv="content-type" content="text/html; charset=utf-8">


  <meta name="go-import" content="goa.design/plugins git https://github.com/goadesign/plugins">
  <meta name="go-source" content="goa.design/plugins _ https://github.com/goadesign/plugins/tree/master/{/dir} https://github.com/goadesign/plugins/blob/master{/dir}/{file}#L{line}">

    The key here is in the tag named "go-import". When go get requests https://goa.design/..., it hits that HTML file and knows that "goa.design/...." must be retrieved using git from https://github.com/goadesign/plugins.

    Here is a good article

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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