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