68 lines
1.2 KiB
Go
68 lines
1.2 KiB
Go
package dsnet
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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 check(e error, optMsg ...string) {
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if e != nil {
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if (len(optMsg) > 0) {
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ExitFail("%s - %s", e, strings.Join(optMsg, " "))
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}
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ExitFail("%s", e)
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}
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}
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func MustPromptString(prompt string, required bool) string {
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reader := bufio.NewReader(os.Stdin)
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var text string
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var err error
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for text == "" {
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fmt.Fprintf(os.Stderr, "%s: ", prompt)
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text, err = reader.ReadString('\n')
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check(err)
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text = strings.TrimSpace(text)
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}
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return text
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}
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func ExitFail(format string, a ...interface{}) {
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fmt.Fprintf(os.Stderr, "\033[31m"+format+"\033[0m\n", a...)
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os.Exit(1)
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}
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func ConfirmOrAbort(format string, a ...interface{}) {
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fmt.Fprintf(os.Stderr, format+" [y/n] ", a...)
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reader := bufio.NewReader(os.Stdin)
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input, err := reader.ReadString('\n')
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if err != nil {
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panic(err)
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}
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if input == "y\n" {
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return
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} else {
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ExitFail("Aborted.")
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}
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}
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func BytesToSI(b int64) string {
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const unit = 1000
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if b < unit {
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return fmt.Sprintf("%d B", b)
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}
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div, exp := int64(unit), 0
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for n := b / unit; n >= unit; n /= unit {
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div *= unit
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exp++
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}
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return fmt.Sprintf("%.1f %cB",
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float64(b)/float64(div), "kMGTPE"[exp])
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}
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