| package main | |
| import ( | |
| "bytes" | |
| "fmt" | |
| "io/ioutil" | |
| "os" | |
| ) | |
| func main() { | |
| args := os.Args | |
| if len(args) != 4 { | |
| fmt.Println("gogoreplace wants three arguments") | |
| fmt.Println(" gogoreplace oldsubstring newsubstring filename") | |
| os.Exit(1) | |
| } | |
| data, err := ioutil.ReadFile(args[3]) | |
| if err != nil { | |
| panic(err) | |
| } | |
| data = bytes.Replace(data, []byte(args[1]), []byte(args[2]), -1) | |
| if err := ioutil.WriteFile(args[3], data, 0666); err != nil { | |
| panic(err) | |
| } | |
| } |