英文:
How can I find out the installation directory of the running program in Go?
问题
如何编写一个名为demo.go的程序，该程序打印出demo.exe的安装路径？
D:\>go build demo.go
demo.exe在D:\中。将demo.exe移动到C:\Windows后，在D:\路径下（不在C:\Windows中）运行demo.exe应该打印出C:\Windows。
下面的图片显示了这种情况下不起作用的原因（因为demo.exe总是获取其当前执行路径，而不是其真实路径）。它只告诉你当前的执行目录，而不是包含该文件的目录。
https://github.com/axgle/go/blob/master/may_app_path_bug.jpg
更新：Windows/Linux解决方案在这里 https://github.com/axgle/app
英文:
How can I write a demo.go program that prints the installation path of demo.exe?
D:\>go build demo.go
demo.exe is in D:\. After moving demo.exe to C:\Windows,then under the D:\ path(it is Not in the C:\Windows) running demo.exe should print C:\Windows.
below picture showing than is not working for this case(because demo.exe always get its current execute path,NOT its really path) . That just tells you the current execute directory, not the directory containing the file
https://github.com/axgle/go/blob/master/may_app_path_bug.jpg
Update: window/linux solution is here https://github.com/axgle/app
答案1
得分: 3
package main
import (
"fmt"
"path/filepath"
"os"
)
func main() {
path, err := filepath.Abs(os.Args[0])
if err != nil { panic(err) }
fmt.Println(path)
}
通过阅读os.Args和filepath.Abs了解更多信息。
英文:
package main
import (
"fmt"
"path/filepath"
"os"
)
func main() {
path, err := filepath.Abs(os.Args[0])
if err != nil { panic(err) }
fmt.Println(path)
}
Learn more by reading about os.Args and filepath.Abs.
答案2
得分: 1
一个可以尝试的起点是：
package main
import "os"
func main() {
println(os.Args[0])
}
$ go run main.go
/tmp/go-build135649844/command-line-arguments/_obj/a.out
$
（仅在Linux上进行了测试，但os包应该是跨平台的，如果可能的话）
英文:
One may try to start from e.g.:
package main
import "os"
func main() {
println(os.Args[0])
}
$ go run main.go
/tmp/go-build135649844/command-line-arguments/_obj/a.out
$
(Tested on Linux only, but the os package should be cross platform where/if possible)
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