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The Tailscale CLI is the primary configuration interface and as such it is used in scripts, container setups, and many other places that do not have a terminal available and should not be made to respond to prompts. The default is set to false where the "risky" API is being used by the CLI and true otherwise, this means that the `--yes` flags are only required under interactive runs and scripts do not need to be concerned with prompts or extra flags. Updates #19445 Signed-off-by: James Tucker <james@tailscale.com>
40 lines
857 B
Go
40 lines
857 B
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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// Package prompt provides a simple way to prompt the user for input.
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package prompt
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import (
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"fmt"
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"os"
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"strings"
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"github.com/mattn/go-isatty"
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)
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// YesNo takes a question and prompts the user to answer the
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// question with a yes or no. It appends a [y/n] to the message.
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//
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// If there is no TTY on both Stdin and Stdout, assume that we're in a script
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// and return the dflt result.
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func YesNo(msg string, dflt bool) bool {
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if !(isatty.IsTerminal(os.Stdin.Fd()) && isatty.IsTerminal(os.Stdout.Fd())) {
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return dflt
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}
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if dflt {
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fmt.Print(msg + " [Y/n] ")
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} else {
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fmt.Print(msg + " [y/N] ")
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}
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var resp string
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fmt.Scanln(&resp)
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resp = strings.ToLower(resp)
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switch resp {
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case "y", "yes", "sure":
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return true
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case "":
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return dflt
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}
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return false
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}
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