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package commands
import (
"bufio"
"context"
"fmt"
"io"
"os"
"runtime"
"strings"
"github.com/docker/cli/cli/streams"
)
func prompt(ctx context.Context, ins io.Reader, out io.Writer, msg string) (bool, error) {
done := make(chan struct{})
var ok bool
go func() {
ok = promptForConfirmation(ins, out, msg)
close(done)
}()
select {
case <-ctx.Done():
return false, context.Cause(ctx)
case <-done:
return ok, nil
}
}
// promptForConfirmation requests and checks confirmation from user.
// This will display the provided message followed by ' [y/N] '. If
// the user input 'y' or 'Y' it returns true other false. If no
// message is provided "Are you sure you want to proceed? [y/N] "
// will be used instead.
//
// Copied from github.com/docker/cli since the upstream version changed
// recently with an incompatible change.
//
// See https://github.com/docker/buildx/pull/2359#discussion_r1544736494
// for discussion on the issue.
func promptForConfirmation(ins io.Reader, outs io.Writer, message string) bool {
if message == "" {
message = "Are you sure you want to proceed?"
}
message += " [y/N] "
_, _ = fmt.Fprint(outs, message)
// On Windows, force the use of the regular OS stdin stream.
if runtime.GOOS == "windows" {
ins = streams.NewIn(os.Stdin)
}
reader := bufio.NewReader(ins)
answer, _, _ := reader.ReadLine()
return strings.ToLower(string(answer)) == "y"
}
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