| package examples |
| |
| import ( |
| "fmt" |
| "os" |
| "strings" |
| ) |
| |
| // CheckArgs should be used to ensure the right command line arguments are |
| // passed before executing an example. |
| func CheckArgs(arg ...string) { |
| if len(os.Args) < len(arg)+1 { |
| Warning("Usage: %s %s", os.Args[0], strings.Join(arg, " ")) |
| os.Exit(1) |
| } |
| } |
| |
| // CheckIfError should be used to naively panics if an error is not nil. |
| func CheckIfError(err error) { |
| if err == nil { |
| return |
| } |
| |
| fmt.Printf("\x1b[31;1m%s\x1b[0m\n", fmt.Sprintf("error: %s", err)) |
| os.Exit(1) |
| } |
| |
| // Info should be used to describe the example commands that are about to run. |
| func Info(format string, args ...interface{}) { |
| fmt.Printf("\x1b[34;1m%s\x1b[0m\n", fmt.Sprintf(format, args...)) |
| } |
| |
| // Warning should be used to display a warning |
| func Warning(format string, args ...interface{}) { |
| fmt.Printf("\x1b[36;1m%s\x1b[0m\n", fmt.Sprintf(format, args...)) |
| } |