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45 lines
848 B
Go
45 lines
848 B
Go
package input
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import (
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"bufio"
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"fmt"
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"os"
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"strings"
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)
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func PromptValue(name string, preValue string) (string, error) {
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return promptValue(name, preValue, false)
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}
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func PromptValueRequired(name string, preValue string) (string, error) {
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return promptValue(name, preValue, true)
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}
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func promptValue(name string, preValue string, required bool) (string, error) {
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for {
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if preValue != "" {
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_, _ = fmt.Fprintf(os.Stderr, "%s [%s]: ", name, preValue)
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} else {
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_, _ = fmt.Fprintf(os.Stderr, "%s: ", name)
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}
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line, err := bufio.NewReader(os.Stdin).ReadString('\n')
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if err != nil {
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return "", err
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}
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line = strings.TrimSpace(line)
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if preValue != "" && line == "" {
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return preValue, nil
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}
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if required && line == "" {
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_, _ = fmt.Fprintf(os.Stderr, "%s is empty\n", name)
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continue
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}
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return line, nil
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}
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}
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