From 22500b8d718f703694186a0fcc4b83ff040fd562 Mon Sep 17 00:00:00 2001
From: Kenta Kubo <601636+kkebo@users.noreply.github.com>
Date: Sat, 19 Oct 2024 22:55:53 +0900
Subject: [PATCH] [wasm] Make `FileManager.createFile()` work on WASI

fixes swiftwasm/swift#5593

`FileManager.createFile()` currently doesn't work on WASI because it
requires `.atomic`, it requires creating a temporary file, and it isn't
suppported on WASI.

So I have fixed that by removing the `.atomic` requirement only on WASI.
---
 .../FoundationEssentials/FileManager/FileManager+Files.swift   | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Sources/FoundationEssentials/FileManager/FileManager+Files.swift b/Sources/FoundationEssentials/FileManager/FileManager+Files.swift
index 6e1799506..abf6e31a1 100644
--- a/Sources/FoundationEssentials/FileManager/FileManager+Files.swift
+++ b/Sources/FoundationEssentials/FileManager/FileManager+Files.swift
@@ -276,6 +276,9 @@ extension _FileManagerImpl {
             }
             attr?[.protectionKey] = nil
         }
+        #elseif os(WASI)
+        // WASI doesn't support a temporary file, so can't use `.atomic`
+        let opts: Data.WritingOptions = []
         #else
         let opts = Data.WritingOptions.atomic
         #endif