From a6c77445e50190990712da923f8fbc2ab836efad Mon Sep 17 00:00:00 2001
From: Jeffrey Alan Scudder <me@jas.life>
Date: Mon, 30 Mar 2026 15:01:27 -0700
Subject: [PATCH] ac-os: check build/firmware/ before host firmware dir

Skip copying firmware blobs that are already staged in the build
directory from a previous run or manual download. Fixes builds in
containers where /usr/lib/firmware lacks i915 DMC files.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 fedac/native/ac-os | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fedac/native/ac-os b/fedac/native/ac-os
index c8c0e6cfc..dd7cd109e 100755
--- a/fedac/native/ac-os
+++ b/fedac/native/ac-os
@@ -557,6 +557,10 @@ build_kernel() {
         local rel="$1"
         local dst="$2/$rel"
         mkdir -p "$(dirname "${dst}")"
+        # Already staged from a previous run or manual download
+        if [ -f "${dst}" ]; then
+            return 0
+        fi
         if [ -f "${HOST_FW_DIR}/${rel}" ]; then
             cp -L "${HOST_FW_DIR}/${rel}" "${dst}"
             return 0
-- 
2.51.2