[wasm] Remove too conservative guards around file operations

Sources/Foundation/Data.swift

@@ -36,6 +36,11 @@
 @usableFromInline let memcpy = Musl.memcpy
 @usableFromInline let memcmp = Musl.memcmp
 #elseif canImport(WASILibc)
+#if swift(>=6.0)
+private import wasi_emulated_mman
+#else
+import wasi_emulated_mman
+#endif
 @usableFromInline let calloc = WASILibc.calloc
 @usableFromInline let malloc = WASILibc.malloc
 @usableFromInline let free = WASILibc.free
@@ -2048,7 +2053,6 @@ public struct Data : ReferenceConvertible, Equatable, Hashable, RandomAccessColl
  }
  }
 
-#if !os(WASI)
  /// Initialize a `Data` with the contents of a `URL`.
  ///
  /// - parameter url: The `URL` to read.
@@ -2061,7 +2065,6 @@ public struct Data : ReferenceConvertible, Equatable, Hashable, RandomAccessColl
  return Data(bytes: d.bytes, count: d.length)
  }
  }
-#endif
 
  /// Initialize a `Data` from a Base-64 encoded String using the given options.
  ///
@@ -2325,7 +2328,6 @@ public struct Data : ReferenceConvertible, Equatable, Hashable, RandomAccessColl
  }
 #endif
 
-#if !os(WASI)
  /// Write the contents of the `Data` to a location.
  ///
  /// - parameter url: The location to write the data into.
@@ -2346,7 +2348,6 @@ public struct Data : ReferenceConvertible, Equatable, Hashable, RandomAccessColl
 #endif
  }
  }
-#endif
 
  // MARK: -
 

Sources/Foundation/NSData.swift

@@ -151,7 +151,6 @@ open class NSData : NSObject, NSCopying, NSMutableCopying, NSSecureCoding {
  _init(bytes: bytes, length: length, copy: false, deallocator: deallocator)
  }
 
-#if !os(WASI)
  /// Initializes a data object with the contents of the file at a given path.
  public init(contentsOfFile path: String, options readOptionsMask: ReadingOptions = []) throws {
  super.init()
@@ -174,7 +173,6 @@ open class NSData : NSObject, NSCopying, NSMutableCopying, NSSecureCoding {
  return nil
  }
  }
-#endif
 
  /// Initializes a data object with the contents of another data object.
  public init(data: Data) {
@@ -184,7 +182,6 @@ open class NSData : NSObject, NSCopying, NSMutableCopying, NSSecureCoding {
  }
  }
 
-#if !os(WASI)
  /// Initializes a data object with the data from the location specified by a given URL.
  public init(contentsOf url: URL, options readOptionsMask: ReadingOptions = []) throws {
  super.init()
@@ -223,7 +220,6 @@ open class NSData : NSObject, NSCopying, NSMutableCopying, NSSecureCoding {
  return try _NSNonfileURLContentLoader.current.contentsOf(url: url)
  }
  }
-#endif
 
  /// Initializes a data object with the given Base64 encoded string.
  public init?(base64Encoded base64String: String, options: Base64DecodingOptions = []) {
@@ -439,7 +435,6 @@ open class NSData : NSObject, NSCopying, NSMutableCopying, NSSecureCoding {
  }
  }
 
-#if !os(WASI)
  internal static func readBytesFromFileWithExtendedAttributes(_ path: String, options: ReadingOptions) throws -> NSDataReadResult {
  guard let handle = FileHandle(path: path, flags: O_RDONLY, createMode: 0) else {
  throw NSError(domain: NSPOSIXErrorDomain, code: Int(errno), userInfo: nil)
@@ -545,7 +540,6 @@ open class NSData : NSObject, NSCopying, NSMutableCopying, NSSecureCoding {
  }
  try write(toFile: url.path, options: writeOptionsMask)
  }
-#endif
 
  // MARK: - Bytes
  /// Copies a number of bytes from the start of the data object into a given buffer.
@@ -1012,7 +1006,6 @@ open class NSMutableData : NSData {
  super.init(data: data)
  }
 
-#if !os(WASI)
  public override init?(contentsOfFile path: String) {
  super.init(contentsOfFile: path)
  }
@@ -1028,7 +1021,6 @@ open class NSMutableData : NSData {
  public override init(contentsOf url: URL, options: NSData.ReadingOptions = []) throws {
  try super.init(contentsOf: url, options: options)
  }
-#endif
 
  public override init?(base64Encoded base64Data: Data, options: NSData.Base64DecodingOptions = []) {
  super.init(base64Encoded: base64Data, options: options)

Sources/Foundation/NSPathUtilities.swift

@@ -195,7 +195,6 @@ extension String {
  return temp
  }
 
-#if !os(WASI)
  internal func _tryToRemovePathPrefix(_ prefix: String) -> String? {
  guard self != prefix else {
  return nil
@@ -208,7 +207,6 @@ extension String {
 
  return nil
  }
-#endif
 }
 
 extension NSString {
@@ -338,7 +336,6 @@ extension NSString {
  return result._stringByFixingSlashes()
  }
 
-#if !os(WASI)
  public var expandingTildeInPath: String {
  guard hasPrefix("~") else {
  return _swiftObject
@@ -359,7 +356,6 @@ extension NSString {
 
  return result
  }
-#endif
 
 #if os(Windows)
  public var unixPath: String {
@@ -374,7 +370,6 @@ extension NSString {
  }
 #endif
 
-#if !os(WASI)
  public var standardizingPath: String {
 #if os(Windows)
  let expanded = unixPath.expandingTildeInPath
@@ -422,8 +417,6 @@ extension NSString {
 
  return resolvedPath
  }
-#endif
-
  public func stringsByAppendingPaths(_ paths: [String]) -> [String] {
  if self == "" {
  return paths
@@ -655,7 +648,6 @@ extension NSString {
 
 }
 
-#if !os(WASI)
 extension FileManager {
  public enum SearchPathDirectory: UInt {
 
@@ -731,13 +723,17 @@ public func NSHomeDirectory() -> String {
 }
 
 public func NSHomeDirectoryForUser(_ user: String?) -> String? {
+#if os(WASI) // WASI does not have user concept
+ return nil
+#else
  let userName = user?._cfObject
  guard let homeDir = CFCopyHomeDirectoryURLForUser(userName)?.takeRetainedValue() else {
  return nil
  }
 
  let url: URL = homeDir._swiftObject
  return url.path
+#endif
 }
 
 public func NSUserName() -> String {
@@ -831,4 +827,3 @@ internal func _NSCleanupTemporaryFile(_ auxFilePath: String, _ filePath: String)
  })
 #endif
 }
-#endif

Sources/Foundation/NSURL.swift

@@ -556,9 +556,6 @@ open class NSURL : NSObject, NSSecureCoding, NSCopying {
  // TODO: should be `checkResourceIsReachableAndReturnError` with autoreleased error parameter.
  // Currently Autoreleased pointers is not supported on Linux.
  open func checkResourceIsReachable() throws -> Bool {
-#if os(WASI)
- return false
-#else
  guard isFileURL,
  let path = path else {
  throw NSError(domain: NSCocoaErrorDomain,
@@ -574,7 +571,6 @@ open class NSURL : NSObject, NSSecureCoding, NSCopying {
  }
 
  return true
-#endif
  }
 
  /* Returns a file path URL that refers to the same resource as a specified URL. File path URLs use a file system style path. An error will occur if the url parameter is not a file URL. A file reference URL's resource must exist and be reachable to be converted to a file path URL. Symbol is present in iOS 4, but performs no operation.
@@ -918,12 +914,8 @@ extension NSURL {
  if selfPath.isAbsolutePath {
  absolutePath = selfPath
  } else {
-#if os(WASI)
- return nil
-#else
  let workingDir = FileManager.default.currentDirectoryPath
  absolutePath = workingDir._bridgeToObjectiveC().appendingPathComponent(selfPath)
-#endif
  }
 
 #if os(Windows)
@@ -971,20 +963,16 @@ extension NSURL {
 
  default:
  resolvedPath = resolvedPath._bridgeToObjectiveC().appendingPathComponent(component)
-#if !os(WASI)
  if let destination = FileManager.default._tryToResolveTrailingSymlinkInPath(resolvedPath) {
  resolvedPath = destination
  }
-#endif
  }
  }
 
  // It might be a responsibility of NSURL(fileURLWithPath:). Check it.
  var isExistingDirectory: ObjCBool = false
 
-#if !os(WASI)
  let _ = FileManager.default.fileExists(atPath: resolvedPath, isDirectory: &isExistingDirectory)
-#endif
 
  if excludeSystemDirs {
  resolvedPath = resolvedPath._tryToRemovePathPrefix("/private") ?? resolvedPath
@@ -1063,7 +1051,6 @@ extension NSURL : _StructTypeBridgeable {
 
 // -----
 
-#if !os(WASI)
 internal func _CFSwiftURLCopyResourcePropertyForKey(_ url: CFTypeRef, _ key: CFString, _ valuePointer: UnsafeMutablePointer<Unmanaged<CFTypeRef>?>?, _ errorPointer: UnsafeMutablePointer<Unmanaged<CFError>?>?) -> _DarwinCompatibleBoolean {
  do {
  let key = URLResourceKey(rawValue: key._swiftObject)
@@ -1597,7 +1584,6 @@ fileprivate extension URLResourceValuesStorage {
  }
  }
 }
-#endif
 
 // -----