Add cachyos_setup.sh for DAMX driver setup

scripts/cachyos_setup.sh

@@ -0,0 +1,98 @@
+#!/bin/bash
+
+# ==========================================
+#  DAMX Driver Builder for CachyOS (Clang)
+# ==========================================
+
+# --- 0. AUTO-ELEVATE TO ROOT ---
+if [ "$EUID" -ne 0 ]; then
+  echo "🔒 Root privileges are required to sign drivers."
+  echo "🔑 Please enter your password to continue..."
+  exec sudo "$0" "$@"
+  exit $?
+fi
+
+# --- 1. CONFIGURATION & CHECKS ---
+KEY=$(find /var/lib /usr/share /etc -name "db.key" 2>/dev/null | head -n 1)
+CERT=$(find /var/lib /usr/share /etc -name "db.pem" 2>/dev/null | head -n 1)
+SIGN_TOOL="/usr/lib/modules/$(uname -r)/build/scripts/sign-file"
+DRIVER_NAME="linuwu_sense"
+# Assuming script is run from inside Linuwu-Sense folder or we navigate there.
+# But if this is in scripts/ folder, we might need to adjust. 
+# Ideally, this script should be moved to Linuwu-Sense folder by the user or run from there.
+# For safety, let's assume the user runs it inside the driver folder as per instructions.
+DRIVER_FILE="./src/${DRIVER_NAME}.ko"
+
+echo "🔧 Preparing to build for CachyOS..."
+
+if [[ -z "$KEY" || -z "$CERT" ]]; then
+    echo "❌ Error: Secure Boot keys (db.key/db.pem) not found."
+    echo "   Ensure you have sbctl installed and keys generated."
+    exit 1
+fi
+
+# --- 2. CLEAN & BUILD (Using Clang/LLD) ---
+echo "🧹 Cleaning previous builds..."
+make clean >/dev/null 2>&1
+
+echo "🔨 Building driver with Clang..."
+make CC=clang LD=ld.lld
+
+if [[ ! -f "$DRIVER_FILE" ]]; then
+    echo "❌ Build failed. $DRIVER_FILE not found."
+    # Fallback check
+    if [[ -f "./${DRIVER_NAME}.ko" ]]; then
+        DRIVER_FILE="./${DRIVER_NAME}.ko"
+        echo "⚠️  Found driver in root folder instead. Proceeding..."
+    else
+        echo "   (Checked both ./src/ and ./ for .ko file)"
+        exit 1
+    fi
+fi
+
+# --- 3. SIGN LOCAL FILE ---
+echo "🔐 Signing driver file: $DRIVER_FILE..."
+"$SIGN_TOOL" sha256 "$KEY" "$CERT" "$DRIVER_FILE"
+
+if modinfo "$DRIVER_FILE" | grep -q "signer"; then
+    echo "✅ Signature applied successfully."
+else
+    echo "❌ Error: Failed to sign the driver."
+    exit 1
+fi
+
+# --- 4. INSTALL ---
+echo "📦 Installing driver..."
+TARGET_DIR="/usr/lib/modules/$(uname -r)/extra"
+mkdir -p "$TARGET_DIR"
+cp "$DRIVER_FILE" "$TARGET_DIR/"
+depmod -a
+
+# --- 5. RELOAD ---
+echo "♻️  Reloading module..."
+modprobe -r "$DRIVER_NAME" 2>/dev/null
+modprobe "$DRIVER_NAME" 2>/dev/null
+
+# --- 6. FINAL STATUS & NEXT STEPS ---
+INSTALLED_PATH=$(modinfo -n "$DRIVER_NAME" 2>/dev/null)
+echo ""
+echo "============================================"
+if modinfo "$INSTALLED_PATH" 2>/dev/null | grep -q "signer"; then
+    echo "✅ SUCCESS: Driver installed and SIGNED."
+else
+    echo "⚠️  WARNING: Driver installed but signature verification failed."
+fi
+echo "============================================"
+echo ""
+echo "📢 IMPORTANT NEXT STEPS:"
+echo "--------------------------------------------------------"
+echo "👉 SCENARIO A: NEW INSTALLATION (First time setup)"
+echo "   1. Go back to the main folder:  cd .."
+echo "   2. Run the installer:           ./setup.sh"
+echo "   3. CRITICAL: Choose Option 2 (Install without Drivers)"
+echo "      (This prevents overwriting your signed driver)"
+echo ""
+echo "👉 SCENARIO B: UPDATING EXISTING DRIVER"
+echo "   1. You are done! Just RESTART your computer now."
+echo "--------------------------------------------------------"
+echo ""