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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2023 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#if canImport(Glibc)
import Glibc
#elseif canImport(Musl)
import Musl
#elseif canImport(Android)
import Android
#elseif os(Windows)
import CRT
#else
import Darwin.C
#endif
#if os(Android)
typealias FILEPointer = OpaquePointer
#else
typealias FILEPointer = UnsafeMutablePointer<FILE>
#endif
enum TerminalHelper {
static var isConnectedToTerminal: Bool {
return isTTY(stderr)
}
/// Checks if passed file pointer is a tty.
static func isTTY(_ filePointer: FILEPointer) -> Bool {
return terminalType(filePointer) == .tty
}
/// The type of terminal.
enum TerminalType {
/// The terminal is a TTY.
case tty
/// The terminal is a file stream.
case file
}
/// Computes the terminal type of the stream.
static func terminalType(_ filePointer: FILEPointer) -> TerminalType {
let isTTY = isatty(fileno(filePointer)) != 0
return isTTY ? .tty : .file
}
}
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