terminal.go

// SPDX-License-Identifier: MIT
//
// Copyright (c) 2019 GitHub Inc.
//               2022 Unikraft GmbH.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

package utils

import (
	"fmt"
	"os"

	"github.com/mattn/go-isatty"
	"golang.org/x/term"
)

var IsTerminal = func(f *os.File) bool {
	return isatty.IsTerminal(f.Fd()) || IsCygwinTerminal(f)
}

func IsCygwinTerminal(f *os.File) bool {
	return isatty.IsCygwinTerminal(f.Fd())
}

var TerminalSize = func(w interface{}) (int, int, error) {
	if f, isFile := w.(*os.File); isFile {
		return term.GetSize(int(f.Fd()))
	}

	return 0, 0, fmt.Errorf("%v is not a file", w)
}