Can I define my own runtime paramet like GOOS or GOARCH in golang?

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英文:

Can I define my own runtime paramet like GOOS or GOARCH in golang?

问题

由于某种原因,我想在构建时使用一个参数来定义。例如 GOLIB=A go buildGOLIB=B go build,并且在代码中使用它,如下所示:

if runtime.GOLIB == "A" {
    // 做一些事情
}
if runtime.GOLIB == "B" {
    // 做一些事情
}

有没有办法实现这个?

修改:

实际的问题是,我有一个新的操作系统(假设称为 A),它类似于 Linux,但有一些不同的 I/O 操作。因此,我想定义自己的类,比如 fd_A.gosyscall_A.go(就像 fd_unix.go/fd_windows.gosyscall.unix.go/syscall.windows.go),它们实现了诸如 Bind,Accept,Recvform,Connect 等方法。

而上述的方法,如 UDP,TCP,HTTP,将在构建项目时使用我定义的方法,使用 go build -tags A,而不带 -tags A 则使用原始方法。

英文:

For some reason I want to use a paramet which define when building. Such as GOLIB=A go build or GOLIB=B go build, and use it like:

if runtime.GOLIB == "A"{
    //dosomething
}
if runtime.GOLIB == "B"{
    //dosomething
}

Is there anyway to did it?

Modify:

The really problem is that I have a new OS (suppoose called A ) which is similar with linux but has some different I/O operation. So I want to define my own class like fd_A.go,syscall_A.go(just like fd_unix.go/fd_windows.go and syscall.unix.go/syscall.windows.go),which implement the method like Bind,Accept,Recvform,Connectetc.

And the upper method such asUDP,TCP,HTTP will use the method I define when build project use go build -tags A, but using origin method without -tags A.

答案1

得分: 1

有没有任何方法可以做到这一点?

没有,至少不是你认为的这种方式。(你不能修改包的运行时。)

你有两个选择:

  • 使用构建标签和文件,根据使用的构建标签定义适当的值。
  • 在链接过程中使用-ldflags "-X 'your/package/path.VariableName=YourValueHere'来注入一个值。

这听起来像是一个XY问题。

英文:

> Is there anyway to did it?

No, at least not how you think this stuff works. (You cannot modify package runtime.)

You have two options:

  • Build Tags and files defining appropriate values based on the build tag used.
  • Inject a value during linkage with -ldflags "-X 'your/package/path.VariableName=YourValueHere'

This sound like an XY problem.

huangapple
  • 本文由 发表于 2022年8月9日 15:38:06
  • 转载请务必保留本文链接:https://go.coder-hub.com/73288103.html
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