From ce56f1c7fd1b3910a30aef18b078bf4d609a9acb Mon Sep 17 00:00:00 2001
From: Yuta Saito <kateinoigakukun@gmail.com>
Date: Fri, 26 Jul 2024 07:25:49 +0000
Subject: [PATCH] Guard out extended or fs attributes related code on WASI

This commit guards out the extended attributes and file system
attributes related code on WASI as WASI does not support these
features. Just return nothing or ignore the set request.
---
 .../FileManager/FileManager+Files.swift             | 13 +++++++++++--
 .../FileManager/FileManager+Utilities.swift         |  2 +-
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/Sources/FoundationEssentials/FileManager/FileManager+Files.swift b/Sources/FoundationEssentials/FileManager/FileManager+Files.swift
index 9bb8f0bbb..75da58f93 100644
--- a/Sources/FoundationEssentials/FileManager/FileManager+Files.swift
+++ b/Sources/FoundationEssentials/FileManager/FileManager+Files.swift
@@ -482,7 +482,7 @@ extension _FileManagerImpl {
 #endif
     }
 
-#if !os(Windows)
+#if !os(Windows) && !os(WASI)
     private func _extendedAttribute(_ key: UnsafePointer<CChar>, at path: UnsafePointer<CChar>, followSymlinks: Bool) throws -> Data? {
         #if canImport(Darwin)
         var size = getxattr(path, key, nil, 0, 0, followSymlinks ? 0 : XATTR_NOFOLLOW)
@@ -626,10 +626,11 @@ extension _FileManagerImpl {
             
             var attributes = statAtPath.fileAttributes
             try? Self._catInfo(for: URL(filePath: path, directoryHint: .isDirectory), statInfo: statAtPath, into: &attributes)
-            
+            #if !os(WASI) // WASI does not support extended attributes
             if let extendedAttrs = try? _extendedAttributes(at: fsRep, followSymlinks: false) {
                 attributes[._extendedAttributes] = extendedAttrs
             }
+            #endif
             
             #if !targetEnvironment(simulator) && FOUNDATION_FRAMEWORK
             if statAtPath.isRegular || statAtPath.isDirectory {
@@ -691,6 +692,9 @@ extension _FileManagerImpl {
                 ]
             }
         }
+#elseif os(WASI)
+        // WASI does not support file system attributes
+        return [:]
 #else
         try fileManager.withFileSystemRepresentation(for: path) { rep in
             guard let rep else {
@@ -918,7 +922,12 @@ extension _FileManagerImpl {
             try Self._setCatInfoAttributes(attributes, path: path)
             
             if let extendedAttrs = attributes[.init("NSFileExtendedAttributes")] as? [String : Data] {
+                #if os(WASI)
+                // WASI does not support extended attributes
+                throw CocoaError.errorWithFilePath(.featureUnsupported, path)
+                #else
                 try Self._setAttributes(extendedAttrs, at: fileSystemRepresentation, followSymLinks: false)
+                #endif
             }
             
             if let date = attributes[.modificationDate] as? Date {
diff --git a/Sources/FoundationEssentials/FileManager/FileManager+Utilities.swift b/Sources/FoundationEssentials/FileManager/FileManager+Utilities.swift
index 624b1125f..99af5996d 100644
--- a/Sources/FoundationEssentials/FileManager/FileManager+Utilities.swift
+++ b/Sources/FoundationEssentials/FileManager/FileManager+Utilities.swift
@@ -169,7 +169,7 @@ extension _FileManagerImpl {
         #endif
     }
 
-#if !os(Windows)
+#if !os(Windows) && !os(WASI)
     static func _setAttribute(_ key: UnsafePointer<CChar>, value: Data, at path: UnsafePointer<CChar>, followSymLinks: Bool) throws {
         try value.withUnsafeBytes { buffer in
             #if canImport(Darwin)