From 445937a4af3026d877ab42181e8626dce22c49b3 Mon Sep 17 00:00:00 2001
From: Markus Fritsche <mfritsche@reauktion.de>
Date: Sat, 9 May 2026 15:27:09 +0000
Subject: [PATCH] linux-fresnel-fourier: bootstrap extlinux-add.sh

---
 arch/linux-fresnel-fourier/extlinux-add.sh | 44 ++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 arch/linux-fresnel-fourier/extlinux-add.sh

diff --git a/arch/linux-fresnel-fourier/extlinux-add.sh b/arch/linux-fresnel-fourier/extlinux-add.sh
new file mode 100644
index 000000000..339a85464
--- /dev/null
+++ b/arch/linux-fresnel-fourier/extlinux-add.sh
@@ -0,0 +1,44 @@
+#!/bin/sh
+# Add / update / remove the linux-fresnel-fourier entry in /boot/extlinux/extlinux.conf
+# Idempotent. Coexists with the existing linux-eos-arm entry; never edits it.
+
+set -eu
+
+CONF="/boot/extlinux/extlinux.conf"
+TAG_BEGIN="# >>> linux-fresnel-fourier (managed) >>>"
+TAG_END="# <<< linux-fresnel-fourier (managed) <<<"
+
+# What the entry should look like. APPEND copied from the existing
+# linux-eos-arm entry where possible; otherwise sane PBP default.
+EOS_APPEND=$(awk '/^[[:space:]]*APPEND/{print substr($0,index($0,"APPEND")+7); exit}' "$CONF" 2>/dev/null || true)
+APPEND="${EOS_APPEND:-console=ttyS2,1500000 root=PARTLABEL=root rw rootwait}"
+
+ENTRY=$(cat <<EOF
+${TAG_BEGIN}
+LABEL fresnel-fourier
+        MENU LABEL fresnel-fourier OC kernel ($(uname -m))
+        LINUX /Image-fresnel-fourier
+        INITRD /initramfs-fresnel-fourier.img
+        FDT /dtbs-fresnel-fourier/rockchip/rk3399-pinebook-pro.dtb
+        APPEND ${APPEND}
+${TAG_END}
+EOF
+)
+
+# Strip any prior managed block first, then append fresh
+TMP=$(mktemp)
+awk -v b="$TAG_BEGIN" -v e="$TAG_END" '
+  $0==b{skip=1; next}
+  $0==e{skip=0; next}
+  !skip{print}
+' "$CONF" > "$TMP"
+
+# If the kernel files no longer exist (post-Remove), don't re-add the entry.
+if [ -f "/boot/Image-fresnel-fourier" ] && [ -f "/boot/dtbs-fresnel-fourier/rockchip/rk3399-pinebook-pro.dtb" ]; then
+  printf '%s\n' "$ENTRY" >> "$TMP"
+  echo "linux-fresnel-fourier: extlinux entry updated"
+else
+  echo "linux-fresnel-fourier: kernel files absent, entry removed"
+fi
+
+mv "$TMP" "$CONF"