如何正确使用构建标签？ [英] How to properly use build tags?

问题描述

我需要能够构建go应用程序的不同版本；

I need to be able to build different versions of a go application; a 'debug' version and a normal version.

这很容易做到；我只是有一个const DEBUG，它可以控制应用程序的行为，但是每次我需要在构建类型之间进行交换时，都不得不编辑配置文件很烦人。

This is easy to do; I simply have a const DEBUG, that controls the behaviour of the application, but it's annoying to have to edit the config file every time I need to swap between build types.

我正在阅读有关go build（ http://golang.org/pkg/go/build/）和标签，我想也许我可以这样做：

I was reading about go build (http://golang.org/pkg/go/build/) and tags, I thought perhaps I could do this:

config.go：

config.go:

// +build !debug
package build
const DEBUG = false

config.debug.go：

config.debug.go:

// +build debug
package build
const DEBUG = true

然后我应该可以使用 go build或 go build-标签调试，并且标签应排除config.go并包含config.debug.go。

Then I should be able to build using "go build" or "go build -tags debug", and the tags should exclude config.go and include config.debug.go.

...但这无法正常工作。我得到：

...but this doesn't work. I get:

src / build / config.go：3：在此块中重新调试（< 0>）前$ b $在src / build / config.debug.go：3上进行b声明：3

src/build/config.go:3: DEBUG redeclared in this block (<0>) previous declaration at src/build/config.debug.go:3

我在做什么错了？

我应该使用其他更合适的#ifdef样式吗？

Is there another and more appropriate #ifdef style way of doing this I should be using?

推荐答案

请参见我对另一个问题的回答。您需要在 // + build行之后留空行。

See my answer to another question. You need a blank line after the "// +build" line.

此外，您可能想要！在config.go中，而不是在config.debug.go中；并且可能您希望其中一个是 DEBUG = false。

Also, you probably want the "!" in config.go, not in config.debug.go; and presumably you want one to be "DEBUG = false".

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