update t440p script

coreboot-t440p/steps/clone_coreboot.sh

@@ -0,0 +1,42 @@
+#!/bin/sh
+# Step: Clone and prepare the coreboot repository
+
+step_clone_coreboot() {
+  section "Clone Coreboot Repository"
+
+  if [ -d "$COREBOOT_DIR" ]; then
+    warn "Coreboot directory already exists: $COREBOOT_DIR"
+    if prompt_yes_no "Remove and re-clone?"; then
+      rm -rf "$COREBOOT_DIR"
+    else
+      info "Using existing coreboot directory."
+      cd "$COREBOOT_DIR" || return 1
+
+      _current=$(git rev-parse HEAD 2>/dev/null)
+      if [ "$_current" = "$COREBOOT_COMMIT" ]; then
+        success "Already on correct commit."
+        return 0
+      else
+        warn "Current commit ($_current) differs from expected ($COREBOOT_COMMIT)."
+        if prompt_yes_no "Checkout the correct commit?"; then
+          run_cmd "git checkout $COREBOOT_COMMIT" || return 1
+          run_cmd "git submodule update --init --checkout" || return 1
+        fi
+        return 0
+      fi
+    fi
+  fi
+
+  info "Cloning coreboot (this may take a while)..."
+  run_cmd "git clone https://review.coreboot.org/coreboot $COREBOOT_DIR" || return 1
+
+  cd "$COREBOOT_DIR" || return 1
+
+  info "Checking out commit: $COREBOOT_COMMIT"
+  run_cmd "git checkout $COREBOOT_COMMIT" || return 1
+
+  info "Initializing submodules..."
+  run_cmd "git submodule update --init --checkout" || return 1
+
+  success "Coreboot repository ready."
+}