# Maintainer: Evangelos Foutras <evangelos@foutrelis.com>
# Contributor: Pierre Schmitz <pierre@archlinux.de>
# Contributor: Jan "heftig" Steffens <jan.steffens@gmail.com>
# Contributor: Daniel J Griffiths <ghost1227@archlinux.us>

# ALARM: Kevin Mihelich <kevin@archlinuxarm.org>
#  - makeflags to -j4 on v7, RAM constraints
#  - build ARMv7 with NEON
#  - let build set march on AArch64
#  - is_cfi=false, use_gold=false
#  - clang_use_default_sample_profile=false, AFDO breaks distcc
#  - use_allocator="none", tcmalloc breaks ARM
#  - patch and rebuild bundled eu-strip

buildarch=12
highmem=1

pkgname=chromium
pkgver=93.0.4577.63
pkgrel=1
_launcher_ver=8
_gcc_patchset=6
pkgdesc="A web browser built for speed, simplicity, and security"
arch=('x86_64')
url="https://www.chromium.org/Home"
license=('BSD')
depends=('gtk3' 'nss' 'alsa-lib' 'xdg-utils' 'libxss' 'libcups' 'libgcrypt'
         'ttf-liberation' 'systemd' 'dbus' 'libpulse' 'pciutils' 'libva'
         'desktop-file-utils' 'hicolor-icon-theme')
makedepends=('python' 'gn' 'ninja' 'clang' 'lld' 'gperf' 'nodejs' 'pipewire'
             'java-runtime-headless' 'git')
optdepends=('pipewire: WebRTC desktop sharing under Wayland'
            'kdialog: support for native dialogs in Plasma'
            'org.freedesktop.secrets: password storage backend on GNOME / Xfce'
            'kwallet: support for storing passwords in KWallet on Plasma')
source=(https://commondatastorage.googleapis.com/chromium-browser-official/$pkgname-$pkgver.tar.xz
        https://github.com/foutrelis/chromium-launcher/archive/v$_launcher_ver/chromium-launcher-$_launcher_ver.tar.gz
        https://github.com/stha09/chromium-patches/releases/download/chromium-${pkgver%%.*}-patchset-$_gcc_patchset/chromium-${pkgver%%.*}-patchset-$_gcc_patchset.tar.xz
        linux-sandbox-syscall-broker-use-struct-kernel_stat.patch
        linux-sandbox-fix-fstatat-crash.patch
        replace-blacklist-with-ignorelist.patch
        sql-make-VirtualCursor-standard-layout-type.patch
        chromium-93-ffmpeg-4.4.patch
        use-oauth2-client-switches-as-default.patch
        0001-widevine-support-for-arm.patch
        0002-Run-blink-bindings-generation-single-threaded.patch
        0003-Fix-eu-strip-build-for-newer-GCC.patch)
sha256sums=('eaf34fa6c2f24054655fbb2376b6e3ddee4cf4868c1324c921e71a45cfc94853'
            '213e50f48b67feb4441078d50b0fd431df34323be15be97c55302d3fdac4483a'
            'a44ffd9e25fcbd8b3cc778871890e4da6fe12600ad549c807e1d03f61f0cdf73'
            '268e18ad56e5970157b51ec9fc8eb58ba93e313ea1e49c842a1ed0820d9c1fa3'
            '253348550d54b8ae317fd250f772f506d2bae49fb5dc75fe15d872ea3d0e04a5'
            'd3344ba39b8c6ed202334ba7f441c70d81ddf8cdb15af1aa8c16e9a3a75fbb35'
            'dd317f85e5abfdcfc89c6f23f4c8edbcdebdd5e083dcec770e5da49ee647d150'
            '1a9e074f417f8ffd78bcd6874d8e2e74a239905bf662f76a7755fa40dc476b57'
            'e393174d7695d0bafed69e868c5fbfecf07aa6969f3b64596d0bae8b067e1711'
            '88bece386073d5a2e970eefcd910010bdc5be2107bdad57bbfc005a4091112f6'
            '9b385876b5da4e639a1a016213858a514c016cea657a24825223563683dba27f'
            'f574f1d703baf4e39a70bed96aec0e9ebe04a304a3ba355ecaa8a93639c104e9')

# Possible replacements are listed in build/linux/unbundle/replace_gn_files.py
# Keys are the names in the above script; values are the dependencies in Arch
declare -gA _system_libs=(
  [ffmpeg]=ffmpeg
  [flac]=flac
  [fontconfig]=fontconfig
  [freetype]=freetype2
  [harfbuzz-ng]=harfbuzz
  [icu]=icu
  [libdrm]=
  [libjpeg]=libjpeg
  [libpng]=libpng    # https://crbug.com/752403#c10
  #[libvpx]=libvpx
  [libwebp]=libwebp
  [libxml]=libxml2
  [libxslt]=libxslt
  [opus]=opus
  [re2]=re2
  [snappy]=snappy
  [zlib]=minizip
)
_unwanted_bundled_libs=(
  $(printf "%s\n" ${!_system_libs[@]} | sed 's/^libjpeg$/&_turbo/')
)
depends+=(${_system_libs[@]})

# Google API keys (see https://www.chromium.org/developers/how-tos/api-keys)
# Note: These are for Arch Linux use ONLY. For your own distribution, please
# get your own set of keys.
#
# Starting with Chromium 89 (2021-03-02) the OAuth2 credentials have been left
# out: https://archlinux.org/news/chromium-losing-sync-support-in-early-march/
#  - Arch Linux ARM has obtained permission to use the Arch Linux keys.
_google_api_key=AIzaSyDwr302FpOSkGRpLlUpPThNTDPbXcIn_FM

prepare() {
  cd "$srcdir/$pkgname-$pkgver"

  # Allow building against system libraries in official builds
  sed -i 's/OFFICIAL_BUILD/GOOGLE_CHROME_BUILD/' \
    tools/generate_shim_headers/generate_shim_headers.py

  # Arch Linux ARM fixes
  patch -p1 -i ../0001-widevine-support-for-arm.patch
  patch -p1 -i ../0002-Run-blink-bindings-generation-single-threaded.patch
  patch -p1 -i ../0003-Fix-eu-strip-build-for-newer-GCC.patch

  # Build ARMv7 with NEON
  [[ $CARCH == "armv7h" ]] && MAKEFLAGS="-j4" && CFLAGS=`echo $CFLAGS | sed -e 's/vfpv3-d16/neon/'` && CXXFLAGS="$CFLAGS"

  # Allow build to set march and options on AArch64 (crc, crypto)
  [[ $CARCH == "aarch64" ]] && CFLAGS=`echo $CFLAGS | sed -e 's/-march=armv8-a//'` && CXXFLAGS="$CFLAGS"

  # https://crbug.com/893950
  sed -i -e 's/\<xmlMalloc\>/malloc/' -e 's/\<xmlFree\>/free/' \
    third_party/blink/renderer/core/xml/*.cc \
    third_party/blink/renderer/core/xml/parser/xml_document_parser.cc \
    third_party/libxml/chromium/*.cc

  # Use the --oauth2-client-id= and --oauth2-client-secret= switches for
  # setting GOOGLE_DEFAULT_CLIENT_ID and GOOGLE_DEFAULT_CLIENT_SECRET at
  # runtime -- this allows signing into Chromium without baked-in values
  patch -Np1 -i ../use-oauth2-client-switches-as-default.patch

  # Fix build with older ffmpeg
  patch -Np1 -i ../chromium-93-ffmpeg-4.4.patch

  # Revert transition to -fsanitize-ignorelist (needs newer clang)
  patch -Rp1 -i ../replace-blacklist-with-ignorelist.patch

  # Upstream fixes
  patch -Np1 -i ../linux-sandbox-syscall-broker-use-struct-kernel_stat.patch
  patch -Np1 -i ../linux-sandbox-fix-fstatat-crash.patch

  # https://chromium-review.googlesource.com/c/chromium/src/+/2862724
  patch -Np1 -i ../sql-make-VirtualCursor-standard-layout-type.patch

  # Fixes for building with libstdc++ instead of libc++
  patch -Np1 -i ../patches/chromium-93-pdfium-include.patch
  patch -Np1 -i ../patches/chromium-90-ruy-include.patch
  patch -Np1 -i ../patches/chromium-93-HashPasswordManager-include.patch
  patch -Np1 -i ../patches/chromium-93-BluetoothLowEnergyScanFilter-include.patch
  patch -Np1 -i ../patches/chromium-93-ClassProperty-include.patch
  patch -Np1 -i ../patches/chromium-93-DevToolsEmbedderMessageDispatcher-include.patch
  patch -Np1 -i ../patches/chromium-93-ScopedTestDialogAutoConfirm-include.patch

  # Link to system tools required by the build
  mkdir -p third_party/node/linux/node-linux-x64/bin
  ln -s /usr/bin/node third_party/node/linux/node-linux-x64/bin/
  ln -s /usr/bin/java third_party/jdk/current/bin/

  # Remove bundled libraries for which we will use the system copies; this
  # *should* do what the remove_bundled_libraries.py script does, with the
  # added benefit of not having to list all the remaining libraries
  local _lib
  for _lib in ${_unwanted_bundled_libs[@]}; do
    find "third_party/$_lib" -type f \
      \! -path "third_party/$_lib/chromium/*" \
      \! -path "third_party/$_lib/google/*" \
      \! -path "third_party/harfbuzz-ng/utils/hb_scoped.h" \
      \! -regex '.*\.\(gn\|gni\|isolate\)' \
      -delete
  done

  ./build/linux/unbundle/replace_gn_files.py \
    --system-libraries "${!_system_libs[@]}"
}

build() {
  make -C chromium-launcher-$_launcher_ver

  cd "$srcdir/$pkgname-$pkgver"

  # Rebuild eu-strip
  pushd buildtools/third_party/eu-strip
  ./build.sh
  popd

  export CC=clang
  export CXX=clang++
  export AR=ar
  export NM=nm

  local _flags=(
    'custom_toolchain="//build/toolchain/linux/unbundle:default"'
    'host_toolchain="//build/toolchain/linux/unbundle:default"'
    'clang_use_chrome_plugins=false'
    'clang_use_default_sample_profile=false'
    'use_allocator="none"'
    'is_official_build=true' # implies is_cfi=true on x86_64
    'is_cfi=false'
    'chrome_pgo_phase=0'
    'treat_warnings_as_errors=false'
    'fieldtrial_testing_like_official_build=true'
    'blink_enable_generated_code_formatting=false'
    'ffmpeg_branding="Chrome"'
    'proprietary_codecs=true'
    'rtc_use_pipewire=true'
    'link_pulseaudio=true'
    'use_gnome_keyring=false'
    'use_gold=false'
    'use_sysroot=false'
    'use_custom_libcxx=false'
    'enable_hangout_services_extension=true'
    'enable_widevine=true'
    'enable_nacl=false'
    "google_api_key=\"$_google_api_key\""
  )

  if [[ -n ${_system_libs[icu]+set} ]]; then
    _flags+=('icu_use_data_file=false')
  fi

  if check_option strip y; then
    _flags+=('symbol_level=0')
  fi

  # Facilitate deterministic builds (taken from build/config/compiler/BUILD.gn)
  CFLAGS+='   -Wno-builtin-macro-redefined'
  CXXFLAGS+=' -Wno-builtin-macro-redefined'
  CPPFLAGS+=' -D__DATE__=  -D__TIME__=  -D__TIMESTAMP__='

  # Do not warn about unknown warning options
  CFLAGS+='   -Wno-unknown-warning-option'
  CXXFLAGS+=' -Wno-unknown-warning-option'

  gn gen out/Release --args="${_flags[*]}"
  ninja -C out/Release chrome chrome_sandbox chromedriver
}

package() {
  cd chromium-launcher-$_launcher_ver
  make PREFIX=/usr DESTDIR="$pkgdir" install
  install -Dm644 LICENSE \
    "$pkgdir/usr/share/licenses/chromium/LICENSE.launcher"

  cd "$srcdir/$pkgname-$pkgver"

  install -D out/Release/chrome "$pkgdir/usr/lib/chromium/chromium"
  install -Dm4755 out/Release/chrome_sandbox "$pkgdir/usr/lib/chromium/chrome-sandbox"
  ln -s /usr/lib/chromium/chromedriver "$pkgdir/usr/bin/chromedriver"

  install -Dm644 chrome/installer/linux/common/desktop.template \
    "$pkgdir/usr/share/applications/chromium.desktop"
  install -Dm644 chrome/app/resources/manpage.1.in \
    "$pkgdir/usr/share/man/man1/chromium.1"
  sed -i \
    -e 's/@@MENUNAME@@/Chromium/g' \
    -e 's/@@PACKAGE@@/chromium/g' \
    -e 's/@@USR_BIN_SYMLINK_NAME@@/chromium/g' \
    "$pkgdir/usr/share/applications/chromium.desktop" \
    "$pkgdir/usr/share/man/man1/chromium.1"

  install -Dm644 chrome/installer/linux/common/chromium-browser/chromium-browser.appdata.xml \
    "$pkgdir/usr/share/metainfo/chromium.appdata.xml"
  sed -ni \
    -e 's/chromium-browser\.desktop/chromium.desktop/' \
    -e '/<update_contact>/d' \
    -e '/<p>/N;/<p>\n.*\(We invite\|Chromium supports Vorbis\)/,/<\/p>/d' \
    -e '/^<?xml/,$p' \
    "$pkgdir/usr/share/metainfo/chromium.appdata.xml"

  local toplevel_files=(
    chrome_100_percent.pak
    chrome_200_percent.pak
    resources.pak
    v8_context_snapshot.bin

    # ANGLE
    libEGL.so
    libGLESv2.so

    chromedriver
    crashpad_handler
  )

  if [[ -z ${_system_libs[icu]+set} ]]; then
    toplevel_files+=(icudtl.dat)
  fi

  cp "${toplevel_files[@]/#/out/Release/}" "$pkgdir/usr/lib/chromium/"
  install -Dm644 -t "$pkgdir/usr/lib/chromium/locales" out/Release/locales/*.pak
  install -Dm755 -t "$pkgdir/usr/lib/chromium/swiftshader" out/Release/swiftshader/*.so

  for size in 24 48 64 128 256; do
    install -Dm644 "chrome/app/theme/chromium/product_logo_$size.png" \
      "$pkgdir/usr/share/icons/hicolor/${size}x${size}/apps/chromium.png"
  done

  for size in 16 32; do
    install -Dm644 "chrome/app/theme/default_100_percent/chromium/product_logo_$size.png" \
      "$pkgdir/usr/share/icons/hicolor/${size}x${size}/apps/chromium.png"
  done

  install -Dm644 LICENSE "$pkgdir/usr/share/licenses/chromium/LICENSE"
}

# vim:set ts=2 sw=2 et: