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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2022 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import class TSCBasic.LocalFileOutputByteStream
import class TSCBasic.TerminalController
import class TSCBasic.ThreadSafeOutputByteStream
import protocol TSCBasic.WritableByteStream
extension WritableByteStream {
/// Returns true if an only if the output byte stream is attached to a TTY.
public var isTTY: Bool {
let stream: WritableByteStream
if let threadSafeStream = self as? ThreadSafeOutputByteStream {
stream = threadSafeStream.stream
} else {
stream = self
}
guard let fileStream = stream as? LocalFileOutputByteStream else {
return false
}
return TerminalController.isTTY(fileStream)
}
}
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