英文:
golang build constraints exclude all Go files in
问题
我构建了一个简单的“Hello, World”wasm应用程序，如下所示：
GOARCH=wasm GOOS=js go build -o lib.wasm main.go
一切都很好。但是，我想在我的本地（Linux）环境中测试我的代码。所以我将它改为一个相当标准的形式：
package main
import "fmt"
func main() {
fmt.Println("test")
}
然后运行简单的命令：
go run .
但是现在我得到了以下错误：
package xxx: build constraints exclude all Go files in xxx
我理解，如果我指定了一个wasm构建，就不能期望在本地运行它。但是我现在并不打算进行wasm构建。我的.go源文件中没有构建约束，并且我的go.mod文件只包含包名和go版本。
如果我将这些文件复制到一个新目录，并且只运行go run .而不进行wasm构建，一切都正常。
而且，如果我运行：
go build filename.go
它可以正常工作。
就好像有些东西“记住了”这个目录应该使用wasm构建，但是我找不到是什么/在哪里。
是否有一个缓存或其他地方记住了一些构建设置，我需要清除它们？我已经尝试过go clean和go clean -cache，但没有成功！
英文:
I build a simple "Hello, World" wasm app like:
GOARCH=wasm GOOS=js go build -o lib.wasm main.go
All is well. But then I want to test my code in my local (Linux) environment. So I change it to a pretty standard:
package main
import "fmt"
func main () {
fmt.Println("test")
}
And do a simple:
go run .
but now I get:
package xxx: build constraints exclude all Go files in xxx
I understand that if I specify a wasm build, I can't expect to run it locally. But I'm not trying to do a wasm build anymore. There are no build constraints in my .go source file, and my go.mod file just has the package and go version.
If I copy these file to a new directory and only do the go run . without the wasm build - all is good.
And if I do:
go build filename.go
it works properly.
It's like something "remembers" that this directory was supposed to be built with wasm - but I cant find what/where.
Is there a cache or something elsewhere that's remembering some build settings that I need to clear? I've tried go clean and go clean -cache - no luck!
答案1
得分: 3
答案似乎是，如果文件名以wasm.go结尾，Go语言会默认认为这是一个wasm文件。
这意味着如果你没有指定正确的操作系统和架构，普通的构建或运行将会失败，但是如果你使用一个明确的文件名（即使它以wasm.go结尾），运行将会正常工作。
???
英文:
The answer seems to be that if a filename ends in wasm.go - go will assume this is indeed a wasm file.
This means that a normal build or run will fail (if you don't specify proper OS and arch) - though a run with an explicit filename (even if it ends in wasm.go will work correctly.
???
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