package main import ( "fmt" "log" "os/exec" ) var buildCmd = &Command{ Name: "build", Usage: "", Summary: "build the go server in the current directory", Help: `build extended help here...`, Run: buildRun, } func buildRun(cmd *Command, args ...string) { out, err := exec.Command("go", "build", "-ldflags", fmt.Sprintf("\"-X main.Build.Date %s main.Build.GitHash %s main.Build.Num %d\"", "2014-12-08", "a1b2c3d4", 107)).Output() if err != nil { log.Fatal(err) } fmt.Printf("%s\n", out) }