build: Make make_chroot and make_local_repo fail when run as root.

src/scripts/make_local_repo.sh

 #!/bin/bash
 
 # Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Load common constants.  This should be the first executable line.
 # The path to common.sh should be relative to your script's location.
 . "$(dirname "$0")/common.sh"
 
-# Script must be run outside the chroot
+# Script must be run outside the chroot and as a regular user.
 assert_outside_chroot
+assert_not_root_user
 
 DEFAULT_DEST="$GCLIENT_ROOT/repo"
 DEFAULT_DEV_PKGLIST="$SRC_ROOT/package_repo/repo_list_dev.txt"
 DEFAULT_IMG_PKGLIST="$SRC_ROOT/package_repo/repo_list_image.txt"
 
 # Command line options
 DEFINE_string suite "$DEFAULT_EXT_SUITE" "Ubuntu suite to pull packages from."
 DEFINE_string mirror "$DEFAULT_EXT_MIRROR" "Ubuntu repository mirror to use."
 DEFINE_string dest "$DEFAULT_DEST" "Destination directory for repository."
 DEFINE_string devlist "$DEFAULT_DEV_PKGLIST" \
@@ skipping 193 matching lines @@
 
 if [ $FLAGS_upimg -eq $FLAGS_TRUE ]
 then
   update_suite $FLAGS_imgsuite $FLAGS_imglist 
 fi
 
 # Clean up the chroot mounts
 cleanup_chroot_mounts
 
 echo "Done."