scripts: call devserver/payload generators from chroot & delete moved scripts

cros_generate_update_payload

-#!/bin/bash
-
-# Copyright (c) 2010 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 generate a Chromium OS update for use by the update engine.
-# If a source .bin is specified, the update is assumed to be a delta update.
-
-# --- BEGIN COMMON.SH BOILERPLATE ---
-# Load common CrOS utilities.  Inside the chroot this file is installed in
-# /usr/lib/crosutils.  Outside the chroot we find it relative to the script's
-# location.
-find_common_sh() {
-  local common_paths=(/usr/lib/crosutils $(dirname "$(readlink -f "$0")"))
-  local path
-
-  SCRIPT_ROOT=
-  for path in "${common_paths[@]}"; do
-    if [ -r "${path}/common.sh" ]; then
-      SCRIPT_ROOT=${path}
-      break
-    fi
-  done
-}
-
-find_common_sh
-. "${SCRIPT_ROOT}/common.sh" || (echo "Unable to load common.sh" && exit 1)
-# --- END COMMON.SH BOILERPLATE ---
-
-# Need to be inside the chroot to load chromeos-common.sh
-assert_inside_chroot
-
-# Load functions and constants for chromeos-install
-. "/usr/lib/installer/chromeos-common.sh" || \
-  die "Unable to load /usr/lib/installer/chromeos-common.sh"
-
-SRC_MNT=""
-DST_MNT=""
-SRC_KERNEL=""
-SRC_ROOT=""
-DST_KERNEL=""
-DST_ROOT=""
-STATE_MNT=""
-STATE_LOOP_DEV=""
-
-# Pass an arg to not exit 1 at the end
-cleanup() {
-  set +e
-  if [ -n "$SRC_MNT" ]; then
-    sudo umount -d "$SRC_MNT"
-    [ -d "$SRC_MNT" ] && rmdir "$SRC_MNT"
-    SRC_MNT=""
-  fi
-  if [ -n "$DST_MNT" ]; then
-    sudo umount -d "$DST_MNT"
-    [ -d "$DST_MNT" ] && rmdir "$DST_MNT"
-    DST_MNT=""
-  fi
-  if [ -n "$STATE_MNT" ]; then
-    sudo umount "$STATE_MNT"
-    [ -d "$STATE_MNT" ] && rmdir "$STATE_MNT"
-    STATE_MNT=""
-  fi
-  if [ -n "$STATE_LOOP_DEV" ]; then
-    sudo losetup -d "$STATE_LOOP_DEV"
-    STATE_LOOP_DEV=""
-  fi
-  rm -f "$SRC_KERNEL"
-  rm -f "$SRC_ROOT"
-  rm -f "$DST_KERNEL"
-  rm -f "$DST_ROOT"
-  [ -n "$1" ] || exit 1
-}
-
-extract_partition_to_temp_file() {
-  local filename="$1"
-  local partition="$2"
-  local temp_file="$3"
-  if [ -z "$temp_file" ]; then
-    temp_file=$(mktemp /tmp/cros_generate_update_payload.XXXXXX)
-    echo "$temp_file"
-  fi
-
-  local offset=$(partoffset "${filename}" ${partition})  # 512-byte sectors
-  local length=$(partsize "${filename}" ${partition})  # 512-byte sectors
-  local bs=512
-  local sectors_per_two_mib=$((2 * 1024 * 1024 / 512))
-  if [ $(( $offset % $sectors_per_two_mib )) -eq 0 -a \
-       $(( $length % $sectors_per_two_mib )) -eq 0 ]; then
-    bs=$((2 * 1024 * 1024))
-    offset=$(($offset / $sectors_per_two_mib))
-    length=$(($length / $sectors_per_two_mib))
-  else
-    warn "partition offset or length not at 2MiB boundary"
-  fi
-  dd if="$filename" of="$temp_file" bs=$bs count="$length" \
-      skip="$offset" 2>/dev/null
-}
-
-patch_kernel() {
-  local IMAGE="$1"
-  local KERN_FILE="$2"
-
-  echo "Patching kernel" $KERN_FILE
-  echo "   into" $IMAGE
-  STATE_LOOP_DEV=$(sudo losetup -f)
-  [ -n "$STATE_LOOP_DEV" ] || die "no free loop device"
-  local offset=$(partoffset "${IMAGE}" 1)
-  offset=$(($offset * 512))
-  sudo losetup -o "$offset" "$STATE_LOOP_DEV" "$IMAGE"
-  STATE_MNT=$(mktemp -d /tmp/state.XXXXXX)
-  sudo mount --read-only "$STATE_LOOP_DEV" "$STATE_MNT"
-  dd if="$STATE_MNT"/vmlinuz_hd.vblock of="$KERN_FILE" conv=notrunc 2>/dev/null
-  sudo umount "$STATE_MNT"
-  STATE_MNT=""
-  sudo losetup -d "$STATE_LOOP_DEV"
-  STATE_LOOP_DEV=""
-}
-
-extract_kern_root() {
-  local bin_file="$1"
-  local kern_out="$2"
-  local root_out="$3"
-
-  if [ -z "$kern_out" ]; then
-    die "missing kernel output filename"
-  fi
-  if [ -z "$root_out" ]; then
-    die "missing root output filename"
-  fi
-
-  extract_partition_to_temp_file "$bin_file" 2 "$kern_out"
-  if [ "$FLAGS_patch_kernel" -eq "$FLAGS_TRUE" ]; then
-    patch_kernel "$bin_file" "$kern_out"
-  fi
-  extract_partition_to_temp_file "$bin_file" 3 "$root_out"
-}
-
-DEFINE_string image "" "The image that should be sent to clients."
-DEFINE_string src_image "" "Optional: a source image. If specified, this makes\
- a delta update."
-DEFINE_boolean old_style "$FLAGS_TRUE" "Generate an old-style .gz full update."
-DEFINE_string output "" "Output file"
-DEFINE_boolean outside_chroot "$FLAGS_FALSE" "Running outside of chroot."
-DEFINE_boolean patch_kernel "$FLAGS_FALSE" "Whether or not to patch the kernel \
-with the patch from the stateful partition (default: false)"
-DEFINE_string private_key "" "Path to private key in .pem format."
-DEFINE_boolean extract "$FLAGS_FALSE" "If set, extract old/new kernel/rootfs \
-to [old|new]_[kern|root].dat. Useful for debugging (default: false)"
-DEFINE_boolean full_kernel "$FLAGS_FALSE" "Generate a full kernel update even \
-if generating a delta update (default: false)"
-
-# Parse command line
-FLAGS "$@" || exit 1
-eval set -- "${FLAGS_ARGV}"
-
-set -e
-
-if [ -n "$FLAGS_src_image" ] && \
-   [ "$FLAGS_outside_chroot" -eq "$FLAGS_FALSE" ]; then
-  # We need to be in the chroot for generating delta images.
-  # by specifying --outside_chroot you can choose not to assert
-  # this will allow us to run this script outside chroot.
-  # Running this script outside chroot requires copying delta_generator binary
-  # and also copying few shared libraries with it.
-  assert_inside_chroot
-fi
-
-locate_gpt
-
-if [ "$FLAGS_extract" -eq "$FLAGS_TRUE" ]; then
-  if [ -n "$FLAGS_src_image" ]; then
-    extract_kern_root "$FLAGS_src_image" old_kern.dat old_root.dat
-  fi
-  if [ -n "$FLAGS_image" ]; then
-    extract_kern_root "$FLAGS_image" new_kern.dat new_root.dat
-  fi
-  echo Done extracting kernel/root
-  exit 0
-fi
-
-DELTA=$FLAGS_TRUE
-[ -n "$FLAGS_output" ] || die \
-    "Error: you must specify an output filename with --output FILENAME"
-
-if [ -z "$FLAGS_src_image" ]; then
-  DELTA=$FLAGS_FALSE
-fi
-
-if [ "$DELTA" -eq "$FLAGS_TRUE" -o "$FLAGS_old_style" -eq "$FLAGS_FALSE" ]; then
-  echo "Generating a delta update"
-
-  # Sanity check that the real generator exists:
-  GENERATOR="$(which delta_generator)"
-  [ -x "$GENERATOR" ] || die "can't find delta_generator"
-
-  trap cleanup INT TERM EXIT
-  if [ "$DELTA" -eq "$FLAGS_TRUE" ]; then
-    if [ "$FLAGS_full_kernel" -eq "$FLAGS_FALSE" ]; then
-      SRC_KERNEL=$(extract_partition_to_temp_file "$FLAGS_src_image" 2)
-      if [ "$FLAGS_patch_kernel" -eq "$FLAGS_TRUE" ]; then
-        patch_kernel "$FLAGS_src_image" "$SRC_KERNEL"
-      fi
-      echo md5sum of src kernel:
-      md5sum "$SRC_KERNEL"
-    else
-      echo "Generating a full kernel update."
-    fi
-    SRC_ROOT=$(extract_partition_to_temp_file "$FLAGS_src_image" 3)
-
-    echo md5sum of src root:
-    md5sum "$SRC_ROOT"
-  fi
-
-  DST_KERNEL=$(extract_partition_to_temp_file "$FLAGS_image" 2)
-  if [ "$FLAGS_patch_kernel" -eq "$FLAGS_TRUE" ]; then
-    patch_kernel "$FLAGS_image" "$DST_KERNEL"
-  fi
-  DST_ROOT=$(extract_partition_to_temp_file "$FLAGS_image" 3)
-
-  if [ "$DELTA" -eq "$FLAGS_TRUE" ]; then
-    SRC_MNT=$(mktemp -d /tmp/src_root.XXXXXX)
-    sudo mount -o loop,ro "$SRC_ROOT" "$SRC_MNT"
-
-    DST_MNT=$(mktemp -d /tmp/src_root.XXXXXX)
-    sudo mount -o loop,ro "$DST_ROOT" "$DST_MNT"
-
-    sudo LD_LIBRARY_PATH=${LD_LIBRARY_PATH}  PATH=${PATH} "$GENERATOR" \
-        -new_dir "$DST_MNT" -new_image "$DST_ROOT" -new_kernel "$DST_KERNEL" \
-        -old_dir "$SRC_MNT" -old_image "$SRC_ROOT" -old_kernel "$SRC_KERNEL" \
-        -out_file "$FLAGS_output" -private_key "$FLAGS_private_key"
-  else
-    "$GENERATOR" \
-        -new_image "$DST_ROOT" -new_kernel "$DST_KERNEL" \
-        -out_file "$FLAGS_output" -private_key "$FLAGS_private_key"
-  fi
-
-  trap - INT TERM EXIT
-  cleanup noexit
-
-  if [ "$DELTA" -eq "$FLAGS_TRUE" ]; then
-    echo "Done generating delta."
-  else
-    echo "Done generating new style full update."
-  fi
-else
-  echo "Generating old-style full update"
-
-  trap cleanup INT TERM EXIT
-  DST_KERNEL=$(extract_partition_to_temp_file "$FLAGS_image" 2)
-  if [ "$FLAGS_patch_kernel" -eq "$FLAGS_TRUE" ]; then
-    patch_kernel "$FLAGS_image" "$DST_KERNEL"
-  fi
-  DST_ROOT=$(extract_partition_to_temp_file "$FLAGS_image" 3)
-
-  GENERATOR="${SCRIPTS_DIR}/mk_memento_images.sh"
-
-  CROS_GENERATE_UPDATE_PAYLOAD_CALLED=1 "$GENERATOR" "$DST_KERNEL" "$DST_ROOT"
-  mv "$(dirname "$DST_KERNEL")/update.gz" "$FLAGS_output"
-
-  trap - INT TERM EXIT
-  cleanup noexit
-  echo "Done generating full update."
-fi