#
# Copyright (C) 2012 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Script to start "uiautomator" on the device
#
# The script does a couple of things:
# * Use an alternative dalvik cache when running as non-root. Jar file needs
#   to be dexopt'd to run in Dalvik. For plain jar files, this is done at first
#   use. shell user does not have write permission to default system Dalvik
#   cache so we redirect to an alternative cache
# * special processing for subcommand 'runtest':
#    * '--nohup' allows process continue to run even if parent process that
#      started it has already terminated. We parse for this parameter and set
#      signal trap. This is useful for testing with USB disconnected
#    * all jar files that the test classes resides in, or dependent on are
#      provided on command line and exported to CLASSPATH environment variable
#      before starting the Java code. This offloads the task of class loading
#      and resolving of cross jar class dependency to Dalvik
#    * all other subcommand or options are directly passed into Java code for
#      further parsing

export run_base=/data/local/tmp
export base=/system

# if not running as root, trick dalvik into using an alternative dex cache
if [ ${USER_ID} -ne 0 ]; then
  tmp_cache=${run_base}/dalvik-cache

  if [ ! -d ${tmp_cache} ]; then
    mkdir -p ${tmp_cache}
  fi

  export ANDROID_DATA=${run_base}
fi

# take first parameter as the command
cmd=${1}

if [ -z "${1}" ]; then
  cmd="help"
fi

# strip the command parameter
if [ -n "${1}" ]; then
  shift
fi

CLASSPATH=/system/framework/android.test.runner.jar:${base}/framework/uiautomator.jar

# eventually args will be what get passed down to Java code
args=
# we also pass the list of jar files, so we can extract class names for tests
# if they are not explicitly specified
jars=

# special case pre-processing for 'runtest' command
if [ "${cmd}" == "runtest" ]; then
  # first parse the jar paths
  while [ true ]; do
    if [ -z "${1}" ] && [ -z "${jars}" ]; then
      echo "Error: more parameters expected for runtest; please see usage for details"
      cmd="help"
      break
    fi
    if [ -z "${1}" ]; then
      break
    fi
    jar=${1}
    if [ "${1:0:1}" = "-" ]; then
      # we are done with jars, starting with parameters now
      break
    fi
    # if relative path, append the default path prefix
    if [ "${1:0:1}" != "/" ]; then
      jar=${run_base}/${1}
    fi
    # about to add the file to class path, check if it's valid
    if [ ! -f ${jar} ]; then
      echo "Error: ${jar} does not exist"
      # force to print help message
      cmd="help"
      break
    fi
    jars=${jars}:${jar}
    # done processing current arg, moving on
    shift
  done
  # look for --nohup: if found, consume it and trap SIG_HUP, otherwise just
  # append the arg to args
  while [ -n "${1}" ]; do
    if [ "${1}" = "--nohup" ]; then
      trap "" HUP
      shift
    else
      args="${args} ${1}"
      shift
    fi
  done
else
  # if cmd is not 'runtest', just take the rest of the args
  args=${@}
fi

args="${cmd} ${args}"
if [ -n "${jars}" ]; then
   args="${args} -e jars ${jars}"
fi

CLASSPATH=${CLASSPATH}:${jars}
export CLASSPATH
exec app_process ${base}/bin com.android.commands.uiautomator.Launcher ${args}