#!/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.

# Make sure we're being sourced (possibly by another script). Check for bash
# since zsh sets $0 when sourcing.
if [[ -n "$BASH_VERSION" && "${BASH_SOURCE:-$0}" == "$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}")"

# Get host architecture, and abort if it is 32-bit.
host_arch=$(uname -m)
case "${host_arch}" in
  x86_64)  # pass
    ;;
  i?86)
    echo "ERROR: Android build requires a 64-bit host build machine."
    return 1
    ;;
  *)
    echo "ERROR: Unsupported host architecture (${host_arch})."
    echo "Try running this script on a Linux/x86_64 machine instead."
    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

# Allow the caller to override a few environment variables. If any of them is
# unset, we default to a sane value that's known to work. This allows for
# experimentation with a custom SDK.
if [[ -z "${ANDROID_NDK_ROOT}" || ! -d "${ANDROID_NDK_ROOT}" ]]; then
  export ANDROID_NDK_ROOT="${CHROME_SRC}/third_party/android_tools/ndk/"
fi
if [[ -z "${ANDROID_SDK_ROOT}" || ! -d "${ANDROID_SDK_ROOT}" ]]; then
  export ANDROID_SDK_ROOT="${CHROME_SRC}/third_party/android_tools/sdk/"
fi

# Add Android SDK tools to system path.
export PATH=$PATH:${ANDROID_SDK_ROOT}/tools
export PATH=$PATH:${ANDROID_SDK_ROOT}/platform-tools

# Add Chromium Android development scripts to system path.
# Must be after CHROME_SRC is set.
export PATH=$PATH:${CHROME_SRC}/build/android

# The set of GYP_DEFINES to pass to gyp.
DEFINES="OS=android"

if [[ -n "$CHROME_ANDROID_OFFICIAL_BUILD" ]]; then
  # These defines are used by various chrome build scripts to tag the binary's
  # version string as 'official' in linux builds (e.g. in
  # chrome/trunk/src/chrome/tools/build/version.py).
  export OFFICIAL_BUILD=1
  export CHROMIUM_BUILD="_google_chrome"
  export CHROME_BUILD_TYPE="_official"
fi

# TODO(thakis), Jan 18 2014: Remove this after two weeks or so, after telling
# everyone to set use_goma in GYP_DEFINES instead of a GOMA_DIR env var.
if [[ -d $GOMA_DIR ]]; then
  DEFINES+=" use_goma=1 gomadir=$GOMA_DIR"
fi

export GYP_DEFINES="${DEFINES}"

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

# 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.
  "${CHROME_SRC}/build/gyp_chromium" --depth="${CHROME_SRC}" --check "$@"
}