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//===--- DirectoryCache.swift ---------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2024 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
//
//===----------------------------------------------------------------------===//
import Foundation
/// A simple cache for the recursive contents of a directory under a given
/// root path. This is pretty basic and doesn't handle cases where we've already
/// cached the parent.
struct DirectoryCache {
private let root: AbsolutePath
private let storage = MutexBox<[RelativePath: [RelativePath]]>()
init(root: AbsolutePath) {
self.root = root
}
func getAllSubpaths(of path: RelativePath) throws -> [RelativePath] {
if let result = storage.withLock(\.[path]) {
return result
}
let absPath = root.appending(path).rawPath
let result = try FileManager.default.subpathsOfDirectory(atPath: absPath)
.map { path.appending($0) }
storage.withLock { storage in
storage[path] = result
}
return result
}
}
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