wip

dots/Sources/FileClient/Client.swift

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+import Dependencies
+import Foundation
+#if canImport(FoundationNetworking)
+import FoundationNetworking
+#endif
+import XCTestDynamicOverlay
+
+/// Represents interactions with the file system.
+///
+public struct FileClient {
+  
+  public var configDirectory: () -> URL
+  public var createDirectory: (URL, Bool) async throws -> Void
+  public var createSymlink: (URL, URL) async throws -> Void
+  public var dotfilesDirectory: () -> URL
+  public var homeDirectory: () -> URL
+  public var exists: (URL) async throws -> Bool
+  public var readFile: (URL) async throws -> Data
+  public var moveToTrash: (URL) async throws -> Void
+  public var writeFile: (Data, URL) async throws -> Void
+  
+  public func createDirectory(
+    at url: URL,
+    withIntermediates: Bool = true
+  ) async throws {
+    let exists = try await self.exists(url)
+    if !exists {
+      try await createDirectory(url, withIntermediates)
+    }
+  }
+  
+  public func createSymlink(
+    source: URL,
+    destination: URL
+  ) async throws {
+    try await self.createSymlink(source, destination)
+  }
+  
+  public func read(file: URL) async throws -> Data {
+    try await self.readFile(file)
+  }
+  
+  public func write(data: Data, to file: URL) async throws {
+    try await writeFile(data, file)
+  }
+}
+
+extension FileClient: TestDependencyKey {
+  public static let noop = Self.init(
+    configDirectory: unimplemented(placeholder: URL(string: "/")!),
+    createDirectory: unimplemented(),
+    createSymlink: unimplemented(),
+    dotfilesDirectory: unimplemented(placeholder: URL(string: "/")!),
+    homeDirectory: unimplemented(),
+    exists: unimplemented(placeholder: false),
+    readFile: unimplemented(placeholder: Data()),
+    moveToTrash: unimplemented(),
+    writeFile: unimplemented()
+  )
+  
+  public static let testValue: FileClient = .noop
+  
+}
+
+extension DependencyValues {
+  public var fileClient: FileClient {
+    get { self[FileClient.self] }
+    set { self[FileClient.self] = newValue }
+  }
+}