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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2020 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 protocol Foundation.LocalizedError
import class Foundation.NSError
import var Foundation.NSLocalizedDescriptionKey
import struct TSCBasic.StringError
public typealias StringError = TSCBasic.StringError
public struct InternalError: Error {
private let description: String
public init(_ description: String) {
assertionFailure(description)
self.description =
"Internal error. Please file a bug at https://github.com/swiftlang/swift-package-manager/issues with this info. \(description)"
}
}
extension Error {
public var interpolationDescription: String {
switch self {
// special case because `LocalizedError` conversion will hide the underlying error
case let _error as DecodingError:
return "\(_error)"
case let _error as LocalizedError:
var description = _error.errorDescription ?? _error.localizedDescription
if let recoverySuggestion = _error.recoverySuggestion {
description += ". \(recoverySuggestion)"
}
return description
case let _error as NSError:
guard var description = _error.userInfo[NSLocalizedDescriptionKey] as? String else {
return "\(self)"
}
if let localizedRecoverySuggestion = _error.localizedRecoverySuggestion {
description += ". \(localizedRecoverySuggestion)"
}
return description
default:
return "\(self)"
}
}
}
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