Port Spectest for Windows

Author: kateinoigakukun

Sources/Spectest/Spectest.swift

@@ -41,7 +41,7 @@ struct Spectest: AsyncParsableCommand {
 
         let rootPath: String
         let filePath = FilePath(path)
-        if (try? FileDescriptor.open(filePath, FileDescriptor.AccessMode.readOnly, options: .directory)) != nil {
+        if isDirectory(filePath) {
             rootPath = path
         } else {
             rootPath = URL(fileURLWithPath: path).deletingLastPathComponent().path

Sources/Spectest/TestCase.swift

@@ -79,13 +79,6 @@ struct TestCase {
     let content: Content
     let path: String
 
-    private static func isDirectory(_ path: FilePath) -> Bool {
-        let fd = try? FileDescriptor.open(path, FileDescriptor.AccessMode.readOnly, options: .directory)
-        let isDirectory = fd != nil
-        try? fd?.close()
-        return isDirectory
-    }
-
     static func load(include: [String], exclude: [String], in path: String, log: ((String) -> Void)? = nil) throws -> [TestCase] {
         let fileManager = FileManager.default
         let filePath = FilePath(path)
@@ -563,3 +556,20 @@ extension Swift.Error {
         return "unknown error: \(self)"
     }
 }
+
+#if os(Windows)
+import WinSDK
+#endif
+internal func isDirectory(_ path: FilePath) -> Bool {
+    #if os(Windows)
+    return path.withPlatformString {
+        let result = GetFileAttributesW($0)
+        return result != INVALID_FILE_ATTRIBUTES && result & DWORD(FILE_ATTRIBUTE_DIRECTORY) != 0
+    }
+    #else
+    let fd = try? FileDescriptor.open(path, FileDescriptor.AccessMode.readOnly, options: .directory)
+    let isDirectory = fd != nil
+    try? fd?.close()
+    return isDirectory
+    #endif
+}