mirror of https://github.com/pulumi/pulumi.git
96 lines
3.1 KiB
Go
96 lines
3.1 KiB
Go
// Copyright 2016-2018, Pulumi Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cmdutil
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import (
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"bufio"
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"fmt"
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"os"
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"runtime"
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"strings"
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"golang.org/x/crypto/ssh/terminal"
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"github.com/pulumi/pulumi/pkg/util/ciutil"
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)
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// Emoji controls whether emojis will by default be printed in the output.
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// While some Linux systems can display Emoji's in the terminal by default, we restrict this to just macOS, like Yarn.
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var Emoji = (runtime.GOOS == "darwin")
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// EmojiOr returns the emoji string e if emojis are enabled, or the string or if emojis are disabled.
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func EmojiOr(e, or string) string {
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if Emoji {
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return e
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}
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return or
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}
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// DisableInteractive may be set to true in order to disable prompts. This is useful when running in a non-attended
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// scenario, such as in continuous integration, or when using the Pulumi CLI/SDK in a programmatic way.
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var DisableInteractive bool
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// Interactive returns true if we should be running in interactive mode. That is, we have an interactive terminal
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// session, interactivity hasn't been explicitly disabled, and we're not running in a known CI system.
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func Interactive() bool {
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return !DisableInteractive && InteractiveTerminal() && !ciutil.IsCI()
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}
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// InteractiveTerminal returns true if the current terminal session is interactive.
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func InteractiveTerminal() bool {
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// If there's a 'TERM' variable and the terminal is 'dumb', then disable interactive mode.
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if v := strings.ToLower(os.Getenv("TERM")); v == "dumb" {
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return false
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}
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// if we're piping in stdin, we're clearly not interactive, as there's no way for a user to
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// provide input. If we're piping stdout, we also can't be interactive as there's no way for
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// users to see prompts to interact with them.
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return terminal.IsTerminal(int(os.Stdin.Fd())) &&
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terminal.IsTerminal(int(os.Stdout.Fd()))
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}
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// ReadConsole reads the console with the given prompt text.
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func ReadConsole(prompt string) (string, error) {
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if prompt != "" {
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fmt.Print(prompt + ": ")
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}
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reader := bufio.NewReader(os.Stdin)
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raw, err := reader.ReadString('\n')
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if err != nil {
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return "", err
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}
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return RemoveTralingNewline(raw), nil
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}
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// IsTruthy returns true if the given string represents a CLI input interpreted as "true".
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func IsTruthy(s string) bool {
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return s == "1" || strings.EqualFold(s, "true")
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}
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// RemoveTralingNewline removes a trailing newline from a string. On windows, we'll remove either \r\n or \n, on other
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// platforms, we just remove \n.
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func RemoveTralingNewline(s string) string {
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s = strings.TrimSuffix(s, "\n")
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if runtime.GOOS == "windows" {
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s = strings.TrimSuffix(s, "\r")
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}
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return s
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}
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