From 84033b879ef2c6bad427a062d25ca45343e4db8b Mon Sep 17 00:00:00 2001
From: Breadway <plasticbread849@gmail.com>
Date: Sat, 15 Aug 2026 22:35:58 +0800
Subject: [PATCH] iso: switch UEFI bootmode from systemd-boot to GRUB

systemd-boot can only read the ESP it launched from, so mkarchiso copies
vmlinuz + initramfs into efiboot.img on top of the ISO9660 copy (~244 MiB
duplicate). uefi.grub reads ISO9660 directly; iso/grub configs were already
present and BOS-branded.
---
 iso/profiledef.sh | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/iso/profiledef.sh b/iso/profiledef.sh
index aa92318..c438138 100644
--- a/iso/profiledef.sh
+++ b/iso/profiledef.sh
@@ -8,7 +8,12 @@ iso_application="Bread Operating System"
 iso_version="$(date +%Y.%m.%d)"
 install_dir="arch"
 buildmodes=('iso')
-bootmodes=('bios.syslinux' 'uefi.systemd-boot')
+# systemd-boot can only read files from the ESP it was launched from, so
+# mkarchiso's _make_bootmode_uefi.systemd-boot copies vmlinuz + initramfs
+# INTO the FAT efiboot.img on top of the copy already on ISO9660 (~244 MiB
+# duplicate). uefi.grub's ESP is only EFI + shell*.efi — GRUB reads ISO9660
+# directly. iso/grub/{grub,loopback}.cfg are already BOS-branded.
+bootmodes=('bios.syslinux' 'uefi.grub')
 arch="x86_64"
 pacman_conf="pacman.conf"
 airootfs_image_type="squashfs"