Golang build target OS dependent tools

goBuilds_osDependent.md

1. Naming file with build restriction foo_${GOOS}.go

2. Adding build directives to the top of the file //+build linux,386 darwin windows

3. on build system set $GOOS variable to target system (no matter which OS is your build system linux<>windows) GOOS = windows go build main.go

4. cpu architecture can be set GOARCH=386 go build main.go

5. check file type file main.exe (linux/wsl)

Credits: (Caskey L. Dickson)[https://youtu.be/COCUqAwAbD0]

main.go

cmd := GetCommand()
out, err := exec.Command(cmd[0], cmd[1:]...).Output()

main_unixlike.go

// +build linux darwin netbsd openbsd freebsd

// compiler recognizes "magic comment" above and includes if target OS is listed there

func GetCommand() []string {
  return []string{"ifconfig", "-a"}
}

main_windows.go

// compiler recognizes _windows from file name and includes if target OS is windows

func GetCommand() []string {
  return []string{"ipconfig", "/all"}
}