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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2024 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 Basics
import Foundation
import PackageModel
public enum ClangSupport {
private struct Feature: Decodable {
let name: String
let value: [String]?
}
private struct Features: Decodable {
let features: [Feature]
}
private static var cachedFeatures = ThreadSafeBox<Features>()
public static func supportsFeature(name: String, toolchain: PackageModel.Toolchain) throws -> Bool {
let features = try cachedFeatures.memoize {
let clangPath = try toolchain.getClangCompiler()
let featuresPath = clangPath.parentDirectory.parentDirectory.appending(components: ["share", "clang", "features.json"])
return try JSONDecoder.makeWithDefaults().decode(
path: featuresPath,
fileSystem: localFileSystem,
as: Features.self
)
}
return features.features.first(where: { $0.name == name }) != nil
}
}
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