From c3a6139f83f75323c1c99f00247b9762eff427f7 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Mon, 14 Mar 2022 00:57:24 -0400
Subject: [PATCH] Run image from temporary copy to avoid modified disk image
 file

---
 Rsconscript | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Rsconscript b/Rsconscript
index 50140a7..3411937 100644
--- a/Rsconscript
+++ b/Rsconscript
@@ -1,3 +1,5 @@
+require "tmpdir"
+
 project_name "HOS"
 path_prepend "x86_64-elf-gcc/bin"
 
@@ -85,6 +87,9 @@ hel_env = env "hel", use: %w[ldc2 x86_64-w64-mingw32-gcc] do |env|
 end
 
 task "run", desc: "Run HOS in QEMU" do
-  img = hel_env.expand("^/hos.img")
-  sh %W[qemu-system-x86_64 -bios OVMF.fd -drive file=#{img},format=raw]
+  Dir.mktmpdir do |tmpdir|
+    img = hel_env.expand("^/hos.img")
+    FileUtils.cp(img, tmpdir)
+    sh %W[qemu-system-x86_64 -bios OVMF.fd -drive file=#{tmpdir}/hos.img,format=raw]
+  end
 end