feat: Live session: power-off fix built for the ISO's kernels, Vapor look and layout at the live login

build-live-modules.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+# build-live-modules.sh: builds Steamify's power-off fix for the live ISO's
+# kernels, so the Steam Machine stays off after shutting down from the live
+# session (recent kernels keep a firmware wake bit set; see Steamify's
+# patches/steamify-fremont-poweroff.c). Run as root in the build container,
+# after steamify-prepare.sh and before buildiso.sh: the headers come from the
+# same repos at the same time as the ISO's kernels, so the versions match.
+# The module checks for Fremont itself and does nothing on other hardware.
+set -euo pipefail
+cd "$(dirname "$0")"
+src=archiso/airootfs/usr/local/share/steamify/steamify-fremont-poweroff.c
+[[ -f "$src" ]] || { echo "No $src: run steamify-prepare.sh first." >&2; exit 1; }
+
+pacman -S --needed --noconfirm base-devel clang llvm lld linux-cachyos-headers linux-cachyos-lts-headers >/dev/null
+work="$(mktemp -d)"
+cp "$src" "$work/"
+echo 'obj-m += steamify-fremont-poweroff.o' > "$work/Makefile"
+for build in /usr/lib/modules/*/build; do
+    kver="$(basename "$(dirname "$build")")"
+    # CachyOS's kernels differ in compiler (linux-cachyos is clang-built):
+    # build with the one the kernel was built with.
+    llvm=()
+    grep -q '^CONFIG_CC_IS_CLANG=y' "$build/.config" && llvm=(LLVM=1)
+    make -s -C "$build" M="$work" "${llvm[@]}" clean modules
+    install -Dm644 "$work/steamify-fremont-poweroff.ko" \
+        "archiso/airootfs/usr/lib/modules/$kver/extra/steamify-fremont-poweroff.ko"
+    echo "Power-off fix built for $kver."
+done
+rm -rf "$work"
+install -Dm644 /dev/stdin archiso/airootfs/etc/modules-load.d/steamify-fremont-poweroff.conf <<< 'steamify-fremont-poweroff'