vendor/go.chromium.org/luci/auth/internal/terminal_windows.go

// Copyright 2023 The LUCI Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//go:build windows
// +build windows

package internal

import (
	"os"

	"golang.org/x/sys/windows"
)

// EnableVirtualTerminal allows ANSI like escape sequences to be captured
// when running in a windows terminal.
func EnableVirtualTerminal() (supported bool, done func()) {
	fd := windows.Handle(os.Stdout.Fd())
	var originalMode uint32

	err := windows.GetConsoleMode(fd, &originalMode)
	if err != nil {
		return false, nil
	}

	err = windows.SetConsoleMode(fd, originalMode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING)
	if err != nil {
		windows.SetConsoleMode(fd, originalMode)
		return false, nil
	}

	return true, func() {
		windows.SetConsoleMode(fd, originalMode)
	}
}