refactor: The session sync and kernel headers scripts in patches/

lib/login-manager.sh

@@ -185,24 +185,7 @@ install_session_sync() {
     local SYNC_SCRIPT="/usr/local/bin/sync-steamos-session.sh"
     info "Installing session sync bridge at $SYNC_SCRIPT"
 
-    sudo tee "$SYNC_SCRIPT" > /dev/null << 'EOF'
-#!/bin/bash
-SRC="/etc/plasmalogin.conf.d/zz-steamos-autologin.conf"
-DEST="/etc/plasmalogin.conf"
-
-[[ -f "$SRC" ]] || exit 0
-SESSION=$(grep -oP '^Session=\K.*' "$SRC")
-[[ -z "$SESSION" ]] && exit 0
-
-# Only touch Session= inside [Autologin]; other sections may have their own.
-if sed -n '/^\[Autologin\]/,/^\[/p' "$DEST" | grep -q '^Session='; then
-    sed -i "/^\[Autologin\]/,/^\[/ s|^Session=.*|Session=$SESSION|" "$DEST"
-elif grep -q '^\[Autologin\]' "$DEST"; then
-    sed -i "/^\[Autologin\]/a Session=$SESSION" "$DEST"
-else
-    printf '\n[Autologin]\nSession=%s\n' "$SESSION" >> "$DEST"
-fi
-EOF
+    patch_file sync-steamos-session.sh | sudo tee "$SYNC_SCRIPT" > /dev/null
 
     sudo chmod +x "$SYNC_SCRIPT"
     ok "Sync script installed."

lib/steam-machine.sh

@@ -295,22 +295,7 @@ install_headers_boot_check() {
     # So check at every boot and install missing headers, which triggers
     # that hook and builds the driver for the new kernel.
     sudo mkdir -p "$(dirname "$HEADERS_SCRIPT")"
-    sudo tee "$HEADERS_SCRIPT" > /dev/null << 'EOF'
-#!/bin/bash
-# Installed by cachyos-gamescope-boot: install missing -headers for every
-# installed kernel, so DKMS builds leds-valve for it.
-set -u
-missing=()
-for k in $(pacman -Qqo /usr/lib/modules/*/pkgbase 2>/dev/null | sort -u); do
-    pacman -Q "${k}-headers" >/dev/null 2>&1 && continue
-    pacman -Si "${k}-headers" >/dev/null 2>&1 && missing+=("${k}-headers")
-done
-[[ ${#missing[@]} -eq 0 ]] && exit 0
-# Another pacman is running (e.g. an update): try again next boot.
-[[ -e /var/lib/pacman/db.lck ]] && { echo "pacman is busy, skipping"; exit 0; }
-echo "Installing missing kernel headers: ${missing[*]}"
-exec pacman -S --needed --noconfirm "${missing[@]}"
-EOF
+    patch_file ensure-kernel-headers.sh | sudo tee "$HEADERS_SCRIPT" > /dev/null
     sudo chmod 755 "$HEADERS_SCRIPT"
     service_file ensure-kernel-headers.service HEADERS_SCRIPT="$HEADERS_SCRIPT" | sudo tee "$HEADERS_UNIT" > /dev/null
     sudo systemctl daemon-reload