func askPrompt(ui packer.Ui) askResponse {
for {
line, err := ui.Ask("[c] Clean up and exit, [a] abort without cleanup, or [r] retry step (build may fail even if retry succeeds)?")
if err != nil {
log.Printf("Error asking for input: %s", err)
}
input := strings.ToLower(line) + "c"
switch input[0] {
case 'c':
return askCleanup
case 'a':
return askAbort
case 'r':
return askRetry
}
ui.Say(fmt.Sprintf("Incorrect input: %#v", line))
}
}
// MultistepDebugFn will return a proper multistep.DebugPauseFn to
// use for debugging if you're using multistep in your builder.
func MultistepDebugFn(ui packer.Ui) multistep.DebugPauseFn {
return func(loc multistep.DebugLocation, name string, state multistep.StateBag) {
var locationString string
switch loc {
case multistep.DebugLocationAfterRun:
locationString = "after run of"
case multistep.DebugLocationBeforeCleanup:
locationString = "before cleanup of"
default:
locationString = "at"
}
message := fmt.Sprintf(
"Pausing %s step '%s'. Press enter to continue.",
locationString, name)
result := make(chan string, 1)
go func() {
line, err := ui.Ask(message)
if err != nil {
log.Printf("Error asking for input: %s", err)
}
result <- line
}()
for {
select {
case <-result:
return
case <-time.After(100 * time.Millisecond):
if _, ok := state.GetOk(multistep.StateCancelled); ok {
return
}
}
}
}
}