mirror of
https://github.com/apple/container.git
synced 2026-07-16 06:27:07 +00:00
Sidhartha Mani
0885cdd6a9
This PR introduces the `Differ` with methods: ```swift // Differ protocol func diff(base: Snapshot?, target: Snapshot) async throws -> Descriptor func apply(descriptor: Descriptor, to base: Snapshot?) async throws -> Snapshot ``` It also introduces `DiffKey`, which is a MerkeTree based key for fast diff computations between two dirs
83 lines
3.6 KiB
Swift
83 lines
3.6 KiB
Swift
//===----------------------------------------------------------------------===//
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// Copyright © 2025 Apple Inc. and the container project authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//===----------------------------------------------------------------------===//
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import Foundation
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// Simple temp-directory helper for tests
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enum TestUtils {
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static func withTempDir<T>(_ body: (URL) throws -> T) throws -> T {
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let dir = FileManager.default.temporaryDirectory.appendingPathComponent("cb-snap-\(UUID().uuidString)", isDirectory: true)
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try FileManager.default.createDirectory(at: dir, withIntermediateDirectories: true)
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defer { try? FileManager.default.removeItem(at: dir) }
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return try body(dir)
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}
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static func withTempDirAsync<T>(_ body: (URL) async throws -> T) async throws -> T {
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let dir = FileManager.default.temporaryDirectory.appendingPathComponent("cb-snap-\(UUID().uuidString)", isDirectory: true)
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try FileManager.default.createDirectory(at: dir, withIntermediateDirectories: true)
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defer { try? FileManager.default.removeItem(at: dir) }
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return try await body(dir)
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}
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@discardableResult
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static func write(_ path: URL, contents: Data, permissions: UInt16? = nil) throws -> URL {
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let fm = FileManager.default
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try fm.createDirectory(at: path.deletingLastPathComponent(), withIntermediateDirectories: true)
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fm.createFile(atPath: path.path, contents: contents)
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if let mode = permissions {
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try fm.setAttributes([.posixPermissions: NSNumber(value: mode)], ofItemAtPath: path.path)
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}
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return path
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}
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@discardableResult
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static func writeString(_ path: URL, _ string: String, permissions: UInt16? = nil) throws -> URL {
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try write(path, contents: Data(string.utf8), permissions: permissions)
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}
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static func readString(_ path: URL) throws -> String {
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String(decoding: try Data(contentsOf: path), as: UTF8.self)
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}
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static func makeSymlink(at: URL, to relativeTarget: String) throws {
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let fm = FileManager.default
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try fm.createDirectory(at: at.deletingLastPathComponent(), withIntermediateDirectories: true)
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try fm.createSymbolicLink(atPath: at.path, withDestinationPath: relativeTarget)
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}
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static func chmod(_ path: URL, mode: UInt16) throws {
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try FileManager.default.setAttributes([.posixPermissions: NSNumber(value: mode)], ofItemAtPath: path.path)
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}
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static func fileExists(_ path: URL) -> Bool {
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FileManager.default.fileExists(atPath: path.path)
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}
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static func mkdir(_ path: URL) throws {
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try FileManager.default.createDirectory(at: path, withIntermediateDirectories: true)
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}
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static func listAll(relativeTo root: URL) throws -> [String] {
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guard let en = FileManager.default.enumerator(at: root, includingPropertiesForKeys: nil) else { return [] }
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var out: [String] = []
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while let u = en.nextObject() as? URL {
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let rel = u.path.replacingOccurrences(of: root.path + "/", with: "")
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out.append(rel)
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}
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return out.sorted()
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}
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}
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