# Copyright 2014 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.

# This file contains common system config stuff for the Android build.

# NOTE: Because Chrome OS builds may depend on targets built with the Android
# toolchain, this GNI file may be read and processed from within Chrome OS
# toolchains. Checking |is_android| here would therefore be too restrictive.
if (is_android || is_chromeos) {
  import("//build_overrides/build.gni")
  import("abi.gni")

  if (build_with_chromium) {
    # Some non-chromium projects (e.g. WebRTC) use our build configs
    # heavily but don't write gclient args files.

    import("//build/config/gclient_args.gni")
    if (defined(checkout_android_native_support)) {
      n = "$0x0A"  # Newline
      assert(checkout_android_native_support,
             "Missing native Android toolchain support. |target_os| in your " +
                 ".gclient configuration file (in the parent directory of " +
                 "src) must include \"android\" and/or \"chromeos\". For " +
                 "example:${n}${n}solutions = [${n}...${n}]${n}" +
                 "target_os=[\"chromeos\"]${n}")
    }
  }

  has_chrome_android_internal =
      exec_script("//build/dir_exists.py",
                  [ rebase_path("//clank", root_build_dir) ],
                  "string") == "True"

  # We are using a separate declare_args block for only this argument so that
  # we can decide if we have to pull in definitions from the internal config
  # early.
  declare_args() {
    # Enables using the internal Chrome for Android repository. The default
    # value depends on whether the repository is available, and if it's not but
    # this argument is manually set to True, the generation will fail.
    # The main purpose of this argument is to avoid having to maintain 2
    # repositories to support both public only and internal builds.
    enable_chrome_android_internal = has_chrome_android_internal

    # Android API level for 32 bits platforms
    android32_ndk_api_level = 16

    # Android API level for 64 bits platforms
    android64_ndk_api_level = 21
  }

  if (enable_chrome_android_internal) {
    import("//clank/config.gni")
  } else {
    import("//build/config/android/sdk.gni")
    declare_args() {
      # Android SDK release. Currently, only "o_mr1" is publicly supported.
      android_sdk_release = default_android_sdk_release
    }
  }

  if (!defined(extra_chrome_shared_library_configs)) {
    extra_chrome_shared_library_configs = []
  }
  if (!defined(extra_chrome_shared_library_deps)) {
    extra_chrome_shared_library_deps = []
  }

  if (!defined(default_android_ndk_root)) {
    default_android_ndk_root = "//third_party/android_ndk"
    default_android_ndk_version = "r16"
    default_android_ndk_major_version = 16
  } else {
    assert(defined(default_android_ndk_version))
    assert(defined(default_android_ndk_major_version))
  }

  if (android_sdk_release == "o_mr1") {
    default_android_sdk_root = "//third_party/android_tools/sdk"
    default_android_sdk_version = "27"
    default_android_sdk_build_tools_version = "27.0.3"
    default_android_sdk_tools_version_suffix = "-26.0.0-dev"
    public_android_sdk = true
  }

  if (!defined(default_lint_android_sdk_root)) {
    # Purposefully repeated so that downstream can change
    # default_android_sdk_root without changing lint version.
    default_lint_android_sdk_root = "//third_party/android_tools/sdk"
    default_lint_android_sdk_version = "26"
  }

  if (!defined(default_extras_android_sdk_root)) {
    # Purposefully repeated so that downstream can change
    # default_android_sdk_root without changing where we load the SDK extras
    # from. (Google Play services, etc.)
    default_extras_android_sdk_root = "//third_party/android_tools/sdk"
  }

  if (!defined(default_android_keystore_path)) {
    default_android_keystore_path = "//build/android/chromium-debug.keystore"
    default_android_keystore_name = "chromiumdebugkey"
    default_android_keystore_password = "chromium"
  }

  # google_play_services_package contains the path where individual client
  # targets (e.g. google_play_services_base_java) are located.
  if (!defined(google_play_services_package)) {
    google_play_services_package = "//third_party/android_tools"
  }

  if (!defined(android_support_library_package)) {
    android_support_library_package = "//third_party/android_tools/support"
  }

  if (!defined(system_webview_apk_target)) {
    system_webview_apk_target = "//android_webview:system_webview_apk"
  }

  webview_public_framework_dep =
      "//third_party/android_system_sdk:public_framework_system_java"
  if (!defined(webview_framework_dep)) {
    webview_framework_dep = webview_public_framework_dep
  }

  # TODO(crbug.com/807768): Remove this extra dependency.
  if (!defined(android_extra_test_deps)) {
    android_extra_test_deps = []
  }

  assert(defined(default_android_sdk_root),
         "SDK release " + android_sdk_release + " not recognized.")

  declare_args() {
    android_ndk_root = default_android_ndk_root
    android_ndk_version = default_android_ndk_version
    android_ndk_major_version = default_android_ndk_major_version

    android_sdk_root = default_android_sdk_root
    android_sdk_version = default_android_sdk_version
    android_sdk_build_tools_version = default_android_sdk_build_tools_version
    android_sdk_tools_version_suffix = default_android_sdk_tools_version_suffix

    lint_android_sdk_root = default_lint_android_sdk_root
    lint_android_sdk_version = default_lint_android_sdk_version

    # Libc++ library directory. Override to use a custom libc++ binary.
    android_libcpp_lib_dir = ""

    # Android versionCode for android_apk()s that don't explicitly set one.
    android_default_version_code = "1"

    # Android versionName for android_apk()s that don't explicitly set one.
    android_default_version_name = "Developer Build"

    # The path to the keystore to use for signing builds.
    android_keystore_path = default_android_keystore_path

    # The name of the keystore to use for signing builds.
    android_keystore_name = default_android_keystore_name

    # The password for the keystore to use for signing builds.
    android_keystore_password = default_android_keystore_password

    # Enables verbose proguard output (summaries and unfiltered output).
    proguard_verbose = false

    # Java debug on Android. Having this on enables multidexing, and turning it
    # off will enable proguard.
    is_java_debug = is_debug

    # Report Java assert failure on Android. Turning it on will report Java
    # assert failure without crash.
    report_java_assert = false

    # Mark APKs as android:debuggable="true".
    debuggable_apks = !is_official_build

    # Set to false to disable the Errorprone compiler
    use_errorprone_java_compiler = true

    # Enables EMMA Java code coverage. Instruments classes during build to
    # produce .ec files during runtime
    emma_coverage = false

    # EMMA filter string consisting of a list of inclusion/exclusion patterns
    # separated with whitespace and/or comma. Only has effect if
    # emma_coverage==true
    emma_filter = ""

    # Disables process isolation when building _incremental targets.
    # Required for Android M+ due to SELinux policies (stronger sandboxing).
    disable_incremental_isolated_processes = false

    # Speeds up incremental compiles by compiling only changed files.
    enable_incremental_javac = false

    # Build incremental targets whenever possible.
    # Ex. with this arg set to true, the chrome_public_apk target result in
    # chrome_public_apk_incremental being built.
    incremental_apk_by_default = false

    # When true, updates all android_aar_prebuilt() .info files during gn gen.
    # Refer to android_aar_prebuilt() for more details.
    update_android_aar_prebuilts = false

    # When true, uses the third party libraries from //third_party/android_deps
    # over the ones in other places. (instead of the support library from
    # android_tools for example)
    enable_android_deps_repository = true
  }

  # We need a second declare_args block to make sure we are using the overridden
  # value of the arguments set above.
  declare_args() {
    if (defined(default_android_sdk_platform_version)) {
      android_sdk_platform_version = default_android_sdk_platform_version
    } else {
      android_sdk_platform_version = android_sdk_version
    }

    # Speed up dexing using dx --incremental.
    enable_incremental_dx = is_java_debug
  }

  # Neither of these should ever be used for release builds since they are
  # somewhat experimental and dx --incremental is known to not produce
  # byte-for-byte identical output.
  assert(!(enable_incremental_dx && !is_java_debug))
  assert(!(enable_incremental_javac && !is_java_debug))

  # Path to where selected build variables are written to.
  android_build_vars = "$root_build_dir/build_vars.txt"

  # Host stuff -----------------------------------------------------------------

  # Defines the name the Android build gives to the current host CPU
  # architecture, which is different than the names GN uses.
  if (host_cpu == "x64") {
    android_host_arch = "x86_64"
  } else if (host_cpu == "x86") {
    android_host_arch = "x86"
  } else {
    assert(false, "Need Android toolchain support for your build CPU arch.")
  }

  # Defines the name the Android build gives to the current host CPU
  # architecture, which is different than the names GN uses.
  if (host_os == "linux") {
    android_host_os = "linux"
  } else if (host_os == "mac") {
    android_host_os = "darwin"
  } else {
    assert(false, "Need Android toolchain support for your build OS.")
  }

  # Directories and files ------------------------------------------------------
  #
  # We define may of the dirs strings here for each output architecture (rather
  # than just the current one) since these are needed by the Android toolchain
  # file to define toolchains for all possible targets in one pass.

  android_sdk =
      "${android_sdk_root}/platforms/android-${android_sdk_platform_version}"

  # Path to the Android NDK and SDK.
  android_ndk_include_dir = "$android_ndk_root/usr/include"

  android_sdk_tools = "${android_sdk_root}/tools"
  android_sdk_build_tools =
      "${android_sdk_root}/build-tools/$android_sdk_build_tools_version"

  # Path to the SDK's android.jar
  android_sdk_jar = "$android_sdk/android.jar"

  # Subdirectories inside android_ndk_root that contain the sysroot for the
  # associated platform.
  x86_android_sysroot_subdir =
      "platforms/android-${android32_ndk_api_level}/arch-x86"
  arm_android_sysroot_subdir =
      "platforms/android-${android32_ndk_api_level}/arch-arm"
  mips_android_sysroot_subdir =
      "platforms/android-${android32_ndk_api_level}/arch-mips"
  x86_64_android_sysroot_subdir =
      "platforms/android-${android64_ndk_api_level}/arch-x86_64"
  arm64_android_sysroot_subdir =
      "platforms/android-${android64_ndk_api_level}/arch-arm64"
  mips64_android_sysroot_subdir =
      "platforms/android-${android64_ndk_api_level}/arch-mips64"

  # Toolchain root directory for each build. The actual binaries are inside
  # a "bin" directory inside of these.
  _android_toolchain_version = "4.9"
  _android_toolchain_detailed_version = "4.9.x"
  x86_android_toolchain_root = "$android_ndk_root/toolchains/x86-${_android_toolchain_version}/prebuilt/${android_host_os}-${android_host_arch}"
  arm_android_toolchain_root = "$android_ndk_root/toolchains/arm-linux-androideabi-${_android_toolchain_version}/prebuilt/${android_host_os}-${android_host_arch}"
  mips_android_toolchain_root = "$android_ndk_root/toolchains/mipsel-linux-android-${_android_toolchain_version}/prebuilt/${android_host_os}-${android_host_arch}"
  x86_64_android_toolchain_root = "$android_ndk_root/toolchains/x86_64-${_android_toolchain_version}/prebuilt/${android_host_os}-${android_host_arch}"
  arm64_android_toolchain_root = "$android_ndk_root/toolchains/aarch64-linux-android-${_android_toolchain_version}/prebuilt/${android_host_os}-${android_host_arch}"
  mips64_android_toolchain_root = "$android_ndk_root/toolchains/mips64el-linux-android-${_android_toolchain_version}/prebuilt/${android_host_os}-${android_host_arch}"

  # Location of libgcc. This is only needed for the current GN toolchain, so we
  # only need to define the current one, rather than one for every platform
  # like the toolchain roots.
  if (current_cpu == "x86") {
    android_prebuilt_arch = "android-x86"
    _binary_prefix = "i686-linux-android"
    android_toolchain_root = "$x86_android_toolchain_root"
    android_libgcc_file = "$android_toolchain_root/lib/gcc/i686-linux-android/${_android_toolchain_detailed_version}/libgcc.a"
  } else if (current_cpu == "arm") {
    android_prebuilt_arch = "android-arm"
    _binary_prefix = "arm-linux-androideabi"
    android_toolchain_root = "$arm_android_toolchain_root"
    android_libgcc_file = "$android_toolchain_root/lib/gcc/arm-linux-androideabi/${_android_toolchain_detailed_version}/libgcc.a"
  } else if (current_cpu == "mipsel") {
    android_prebuilt_arch = "android-mips"
    _binary_prefix = "mipsel-linux-android"
    android_toolchain_root = "$mips_android_toolchain_root"
    android_libgcc_file = "$android_toolchain_root/lib/gcc/mipsel-linux-android/${_android_toolchain_detailed_version}/libgcc.a"
  } else if (current_cpu == "x64") {
    android_prebuilt_arch = "android-x86_64"
    _binary_prefix = "x86_64-linux-android"
    android_toolchain_root = "$x86_64_android_toolchain_root"
    android_libgcc_file = "$android_toolchain_root/lib/gcc/x86_64-linux-android/${_android_toolchain_detailed_version}/libgcc.a"
  } else if (current_cpu == "arm64") {
    android_prebuilt_arch = "android-arm64"
    _binary_prefix = "aarch64-linux-android"
    android_toolchain_root = "$arm64_android_toolchain_root"
    android_libgcc_file = "$android_toolchain_root/lib/gcc/aarch64-linux-android/${_android_toolchain_detailed_version}/libgcc.a"
  } else if (current_cpu == "mips64el") {
    android_prebuilt_arch = "android-mips64"
    _binary_prefix = "mips64el-linux-android"
    android_toolchain_root = "$mips64_android_toolchain_root"
    android_libgcc_file = "$android_toolchain_root/lib/gcc/mips64el-linux-android/${_android_toolchain_detailed_version}/libgcc.a"
  } else {
    assert(false, "Need android libgcc support for your target arch.")
  }

  android_tool_prefix = "$android_toolchain_root/bin/$_binary_prefix-"
  android_readelf = "${android_tool_prefix}readelf"
  android_objcopy = "${android_tool_prefix}objcopy"
  android_gdbserver =
      "$android_ndk_root/prebuilt/$android_prebuilt_arch/gdbserver/gdbserver"

  # Toolchain stuff ------------------------------------------------------------

  android_libcpp_root = "$android_ndk_root/sources/cxx-stl/llvm-libc++"

  if (android_libcpp_lib_dir == "") {
    android_libcpp_lib_dir = "${android_libcpp_root}/libs/${android_app_abi}"
  }

  # Dynamic app bundles -------------------------------------------------------

  # TODO(digit): Remove this once we roll a version of the Android SDK that
  # has the proper build-tools binaries to both public and internal.
  declare_args() {
    # To enable generation of application bundles, define
    # android_sdk_app_bundle_build_tools to point to an Android SDK build-tools
    # directory that has the relevant aapt2 and bundletool binaries.
    #
    android_sdk_app_bundle_build_tools = ""
  }

  # Whether building application bundles is supported.
  android_enable_app_bundles = android_sdk_app_bundle_build_tools != ""
}

declare_args() {
  # Enables used resource whitelist generation. Set for official builds only
  # as a large amount of build output is generated.
  enable_resource_whitelist_generation = is_android && is_official_build
}