Allow factory install shim to be overlay installed

src/scripts/build_image

 #!/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.
 
 # Script to build a bootable keyfob-based chromeos system image from within
 # a chromiumos setup. This assumes that all needed packages have been built into
 # the given target's root with binary packages turned on. This script will
 # build the Chrome OS image using only pre-built binary packages.
@@ skipping 23 matching lines @@
 DEFINE_boolean installmask $FLAGS_TRUE \
   "Use INSTALL_MASK to shrink the resulting image."
 DEFINE_integer jobs -1 \
   "How many packages to build in parallel at maximum."
 DEFINE_boolean statefuldev $FLAGS_TRUE \
   "Install development packages on stateful partition rather than the rootfs"
 DEFINE_string to "" \
   "The target image file or device"
 DEFINE_boolean withtest $FLAGS_FALSE \
   "Include packages required for testing and prepare image for testing"
-DEFINE_string factory_server "" \
-  "Build a factory install image pointing to given server."
 DEFINE_string arm_extra_bootargs "" \
   "Additional command line options to pass to the ARM kernel."
 
 # Parse command line.
 FLAGS "$@" || exit 1
 eval set -- "${FLAGS_ARGV}"
 
 # Only now can we die on error.  shflags functions leak non-zero error codes,
 # so will die prematurely if 'set -e' is specified before now.
 set -e
@@ skipping 274 matching lines @@
       --usepkgonly chromeos-dev $EMERGE_JOBS
 
   # TODO(sosa@chromium.org) - Re-hide under statefuldev after switch
   # Flag will mount /usr/local on target device
   sudo mkdir -p "$ROOT_FS_DIR/root"
 
   # The ldd tool is a useful shell script but lives in glibc; just copy it.
   sudo cp -a "$(which ldd)" "${ROOT_DEV_DIR}/usr/bin"
 fi
 
-if [ -n "$FLAGS_factory_server" ]; then
-  sudo INSTALL_MASK="$INSTALL_MASK" emerge-${BOARD} \
-      --root="$ROOT_DEV_DIR" --root-deps=rdeps \
-      --usepkgonly chromeos-factoryinstall $EMERGE_JOBS
-fi
-
 # Install packages required for testing.
 if [[ $FLAGS_withtest -eq $FLAGS_TRUE ]] ; then
   sudo INSTALL_MASK="$INSTALL_MASK" emerge-${BOARD} \
       --root="$ROOT_DEV_DIR" --root-deps=rdeps \
       --usepkgonly chromeos-test $EMERGE_JOBS
 fi
 
 # Perform any customizations on the root file system that are needed.
 EXTRA_CUSTOMIZE_ROOTFS_FLAGS=""
 if [ $FLAGS_withdev -eq $FLAGS_TRUE ]; then
   EXTRA_CUSTOMIZE_ROOTFS_FLAGS="--withdev"
 fi
-if [ -n "$FLAGS_factory_server" ]; then
-# Indentation off b/c of long line
-EXTRA_CUSTOMIZE_ROOTFS_FLAGS="$EXTRA_CUSTOMIZE_ROOTFS_FLAGS"\
-" --factory_server=$FLAGS_factory_server"
-fi
 
 # Extract the kernel from the root filesystem for use by the GPT image. Legacy
 # BIOS will use the kernel in the rootfs (via syslinux), Chrome OS BIOS will
 # use the kernel partition.
 sudo cp -f "${ROOT_FS_DIR}/boot/vmlinuz" "${OUTPUT_DIR}/vmlinuz.image"
 
 # Create EFI System Partition to boot stock EFI BIOS (but not ChromeOS EFI
 # BIOS). We only need this for x86, but it's simpler and safer to keep the disk
 # images the same for both x86 and ARM.
 ESP_IMG=${OUTPUT_DIR}/esp.image
@@ skipping 82 matching lines @@
 
 OUTSIDE_OUTPUT_DIR="../build/images/${FLAGS_board}/${IMAGE_SUBDIR}"
 echo "Done.  Image created in ${OUTPUT_DIR}"
 echo "To copy to USB keyfob, OUTSIDE the chroot, do something like:"
 echo "  ./image_to_usb.sh --from=${OUTSIDE_OUTPUT_DIR} --to=/dev/sdX"
 echo "To convert to VMWare image, OUTSIDE the chroot, do something like:"
 echo "  ./image_to_vmware.sh --from=${OUTSIDE_OUTPUT_DIR}"
 echo "from the scripts directory where you entered the chroot."
 
 trap - EXIT