使用不同的软件包和构建标签构建多个二进制文件

Question

I have an application that needs to use different packages depending on the target operating system and then generate an executable. The core package has an interface that needs to be populated depending on the package that is used.

I've recently found out the best way to achieve this is by using build tags. But what I'm struggling with is getting the interface populated by the loaded package with the correct build tag(s). Or perhaps there is a better alternative approach.

Here is a visual of how I imagined this to look like:

Answer 1

Create two files somewhat like these:

// +build myBuildFlag

package mypackage

import package1

var important = package1.Foo

Other one:

// +build !myBuildFlag

package mypackage

import package2

var important = package2.Foo

Now whenever you use important it something different depending on your build flag.