#!/bin/bash
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Sets up environment for building Chromium on Android.  It can either be
# compiled with the Android tree or using the Android SDK/NDK. To build with
# NDK/SDK: ". build/android/envsetup.sh".  Environment variable
# ANDROID_SDK_BUILD=1 will then be defined and used in the rest of the setup to
# specifiy build type.

# TODO(ilevy): Figure out the right check here. This breaks the webkit build as
# is since it's sourced from another script:
# http://build.webkit.org/builders/Chromium%20Android%20Release/builds/34681
#if [ "$_" == "$0" ]; then
#  echo "ERROR: envsetup must be sourced."
#  exit 1
#fi

# Source functions script.  The file is in the same directory as this script.
SCRIPT_DIR="$(dirname "${BASH_SOURCE:-$0}")"
. "${SCRIPT_DIR}"/envsetup_functions.sh

export ANDROID_SDK_BUILD=1  # Default to SDK build.

process_options "$@"

# When building WebView as part of Android we can't use the SDK. Other builds
# default to using the SDK.
if [[ "${CHROME_ANDROID_BUILD_WEBVIEW}" -eq 1 ]]; then
  export ANDROID_SDK_BUILD=0
fi

if [[ "${ANDROID_SDK_BUILD}" -ne 1 ]]; then
  echo "Initializing for non-SDK build."
fi

# Get host architecture, and abort if it is 32-bit, unless --try-32
# is also used.
host_arch=$(uname -m)
case "${host_arch}" in
  x86_64)  # pass
    ;;
  i?86)
    if [[ -z "${try_32bit_host_build}" ]]; then
      echo "ERROR: Android build requires a 64-bit host build machine."
      echo "If you really want to try it on this machine, use the \
--try-32bit-host flag."
      echo "Be warned that this may fail horribly at link time, due \
very large binaries."
      return 1
    else
      echo "WARNING: 32-bit host build enabled. Here be dragons!"
      host_arch=x86
    fi
    ;;
  *)
    echo "ERROR: Unsupported host architecture (${host_arch})."
    echo "Try running this script on a Linux/x86_64 machine instead."
    return 1
esac

case "${host_os}" in
  "linux")
    toolchain_dir="linux-${host_arch}"
    ;;
  "mac")
    toolchain_dir="darwin-${host_arch}"
    ;;
  *)
    echo "Host platform ${host_os} is not supported" >& 2
    return 1
esac

CURRENT_DIR="$(readlink -f "${SCRIPT_DIR}/../../")"
if [[ -z "${CHROME_SRC}" ]]; then
  # If $CHROME_SRC was not set, assume current directory is CHROME_SRC.
  export CHROME_SRC="${CURRENT_DIR}"
fi

if [[ "${CURRENT_DIR/"${CHROME_SRC}"/}" == "${CURRENT_DIR}" ]]; then
  # If current directory is not in $CHROME_SRC, it might be set for other
  # source tree. If $CHROME_SRC was set correctly and we are in the correct
  # directory, "${CURRENT_DIR/"${CHROME_SRC}"/}" will be "".
  # Otherwise, it will equal to "${CURRENT_DIR}"
  echo "Warning: Current directory is out of CHROME_SRC, it may not be \
the one you want."
  echo "${CHROME_SRC}"
fi

if [[ "${ANDROID_SDK_BUILD}" -eq 1 ]]; then
  if [[ -z "${TARGET_ARCH}" ]]; then
    return 1
  fi
  sdk_build_init
# Sets up environment for building Chromium for Android with source. Expects
# android environment setup and lunch.
elif [[ -z "$ANDROID_BUILD_TOP" || \
        -z "$ANDROID_TOOLCHAIN" || \
        -z "$ANDROID_PRODUCT_OUT" ]]; then
  echo "Android build environment variables must be set."
  echo "Please cd to the root of your Android tree and do: "
  echo "  . build/envsetup.sh"
  echo "  lunch"
  echo "Then try this again."
  echo "Or did you mean NDK/SDK build. Run envsetup.sh without any arguments."
  return 1
elif [[ -n "$CHROME_ANDROID_BUILD_WEBVIEW" ]]; then
  webview_build_init
fi

java -version 2>&1 | grep -qs "Java HotSpot"
if [ $? -ne 0 ]; then
  echo "Please check and make sure you are using the Oracle Java SDK, and it"
  echo "appears before other Java SDKs in your path."
  echo "Refer to the \"Install prerequisites\" section here:"
  echo "https://code.google.com/p/chromium/wiki/AndroidBuildInstructions"
  return 1
fi

if [[ -n "$JAVA_HOME" && -x "$JAVA_HOME/bin/java" ]]; then
  "$JAVA_HOME/bin/java" -version 2>&1 | grep -qs "Java HotSpot"
  if [ $? -ne 0 ]; then
    echo "If JAVA_HOME is defined then it must refer to the install location"
    echo "of the Oracle Java SDK."
    echo "Refer to the \"Install prerequisites\" section here:"
    echo "https://code.google.com/p/chromium/wiki/AndroidBuildInstructions"
    return 1
  fi
fi

# Workaround for valgrind build
if [[ -n "$CHROME_ANDROID_VALGRIND_BUILD" ]]; then
# arm_thumb=0 is a workaround for https://bugs.kde.org/show_bug.cgi?id=270709
  DEFINES+=" arm_thumb=0 release_extra_cflags='-fno-inline\
 -fno-omit-frame-pointer -fno-builtin' release_valgrind_build=1\
 release_optimize=1"
fi

# Source a bunch of helper functions
. ${CHROME_SRC}/build/android/adb_device_functions.sh

ANDROID_GOMA_WRAPPER=""
if [[ -d $GOMA_DIR ]]; then
  ANDROID_GOMA_WRAPPER="$GOMA_DIR/gomacc"
  num_cores="$(grep --count ^processor /proc/cpuinfo)"
# Goma is IO-ish you want more threads than you have cores.
  let goma_threads=num_cores*2
  if [ -z "${GOMA_COMPILER_PROXY_THREADS}" -a "${goma_threads}" -gt 16 ]; then
# The default is 16 threads, if the machine has many cores we crank it up a bit
    GOMA_COMPILER_PROXY_THREADS="${goma_threads}"
    export GOMA_COMPILER_PROXY_THREADS
  fi
fi
export ANDROID_GOMA_WRAPPER

# Declare Android are cross compile.
export GYP_CROSSCOMPILE=1

# Performs a gyp_chromium run to convert gyp->Makefile for android code.
android_gyp() {
  # This is just a simple wrapper of gyp_chromium, please don't add anything
  # in this function.
  echo "GYP_GENERATORS set to '$GYP_GENERATORS'"
  (
    "${CHROME_SRC}/build/gyp_chromium" --depth="${CHROME_SRC}" --check "$@"
  )
}

# FLOCK needs to be null on system that has no flock
which flock > /dev/null || export FLOCK=