Enable fast build by default in build_image and mod_image_for_test.sh.

common.sh

 # 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.
 
 # Common constants for build scripts
 # This must evaluate properly for both /bin/bash and /bin/sh
 
 # All scripts should die on error unless commands are specifically excepted
 # by prefixing with '!' or surrounded by 'set +e' / 'set -e'.
 # TODO: Re-enable this once shflags is less prone to dying.
@@ skipping 87 matching lines @@
 DEFAULT_BUILD_ROOT=${CHROMEOS_BUILD_ROOT:-"$SRC_ROOT/build"}
 
 # Set up a global ALL_BOARDS value
 ALL_BOARDS=$(cd $SRC_ROOT/overlays;ls -1d overlay-* 2>&-|sed 's,overlay-,,g')
 # Strip CR
 ALL_BOARDS=$(echo $ALL_BOARDS)
 # Set a default BOARD
 #DEFAULT_BOARD=x86-generic # or...
 DEFAULT_BOARD=$(echo $ALL_BOARDS | awk '{print $NF}')
 
+# Enable --fast by default on non-official builds
+DEFAULT_FAST="${FLAGS_TRUE}"
+if [ "${CHROMEOS_OFFICIAL:-0}" = "1" ]; then
+  DEFAULT_FAST="${FLAGS_FALSE}"
+fi
+
 # Detect whether we're inside a chroot or not
 if [ -e /etc/debian_chroot ]
 then
   INSIDE_CHROOT=1
 else
   INSIDE_CHROOT=0
 fi
 
 # Directory locations inside the dev chroot
 CHROOT_TRUNK_DIR="/home/$USER/trunk"
@@ skipping 321 matching lines @@
 start_time=$(date +%s)
 
 # Print time elsapsed since start_time.
 print_time_elapsed() {
   end_time=$(date +%s)
   elapsed_seconds="$(( $end_time - $start_time ))"
   minutes="$(( $elapsed_seconds / 60 ))"
   seconds="$(( $elapsed_seconds % 60 ))"
   echo "Elapsed time: ${minutes}:${seconds}"
 }