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# Maintainer (arch): Jan Alexander Steffens (heftig) <heftig@archlinux.org>
# Contributor (arch): Ionut Biru <ibiru@archlinux.org>
# Contributor (arch): Jakub Schmidtke <sjakub@gmail.com>
# Maintainer (connochaetos): Henry Jensen <hjensen@connochaetos.org>
# Maintainer (alarm): Kevin Mihelich <kevin@archlinuxarm.org>
# Maintainer (arch32): Andreas Baumann <mail@andreasbaumann.cc>
# Contributor (arch32): Erich Eckner <git@eckner.net>
# Contributor: Andreas Grapentin <andreas@grapentin.org>
# Contributor: Luke Shumaker <lukeshu@parabola.nu>
# Contributor: André Silva <emulatorman@hyperbola.info>
# Contributor: Márcio Silva <coadde@hyperbola.info>
# Contributor: fauno <fauno@kiwwwi.com.ar>
# Contributor: vando <facundo@esdebian.org>
# Contributor: Figue <ffigue at gmail>
# Contributor: evr <evanroman at gmail>
# Contributor: Muhammad 'MJ' Jassim <UnbreakableMJ@gmail.com>
# Contributor: taro-k <taro-k@movasense_com>
# Contributor: Michał Masłowski <mtjm@mtjm.eu>
# Contributor: Luke R. <g4jc@openmailbox.org>
# Contributor: Isaac David <isacdaavid@isacdaavid.info>
# Contributor: bill-auger <bill-auger@programmer.net>
# Contributor: grizzlyuser <grizzlyuser@protonmail.com>


# Rational for inclusion in [libre]:
# FSDG:
#  - Modify the addons pages to use GNU IceCat plugins sources, rather
#    than addons.mozilla.org, which hosts non-free addons
#  - Disable EME, which is implemented via the non-free libWideVine CDM
#  - Rebrand to Iceweasel, per the mozilla trademark policy,
#    due to these FSDG changes
#
# technical:
#  - build i686 with GCC instead of clang
#  - disable rust-SIMD, LTO, PGO, and skip profiling build for armv7h and i686
#  - allow skipping profiling build for x86_64 (_x86_64_skip_pgo)
#  - prefer as many system libs as possible, over their vendored couterparts
# 
# privacy:
#  - Remove Google API keys and usage
#  - Disable Mozilla telemetry and crash reporting (good manners
#    because of all of the other patching we're doing)


pkgname=iceweasel
epoch=1
pkgver=80.0
pkgrel=1
pkgrel+=.parabola1
_brandingver=80.0
_brandingrel=1
pkgdesc="Standalone web browser derived from Mozilla Firefox"
arch=(x86_64)
arch+=(i686 armv7h)
license=(MPL GPL LGPL)
url="https://wiki.parabola.nu/Iceweasel"
depends=(gtk3 libxt mime-types dbus-glib ffmpeg nss ttf-font libpulse)
makedepends=(unzip zip diffutils yasm mesa imake inetutils xorg-server-xvfb
             autoconf2.13 rust clang llvm jack gtk2 nodejs cbindgen nasm
             python-setuptools python-psutil lld)
# FIXME: 'mozilla-serarchplugins' package needs re-working (see note in prepare())
makedepends+=(quilt libxslt imagemagick git jq)
optdepends=('networkmanager: Location detection via available WiFi networks'
            'libnotify: Notification integration'
            'pulseaudio: Audio support'
            'speech-dispatcher: Text-to-Speech'
            'hunspell-en_US: Spell checking, American English')
replaces=('firefox')
options=(!emptydirs !makeflags !strip)
source=(https://archive.mozilla.org/pub/firefox/releases/$pkgver/source/firefox-$pkgver.source.tar.xz{,.asc}
        0001-Use-remoting-name-for-GDK-application-names.patch
        $pkgname.desktop)
source+=(https://repo.parabola.nu/other/iceweasel/${pkgname}_${_brandingver}-${_brandingrel}.branding.tar.xz{,.sig}
         libre.patch
         libre-searchengines.patch
         vendor.js.in)
source_armv7h=(arm.patch
               build-arm-libopus.patch)
source_i686=('avoid-libxul-OOM-python-check.patch'
             'rust-static-disable-network-test-on-static-libraries.patch')
sha256sums=('380d9853e0712442ba2d4acd85c0e09c19ad36561a3ea8932705ad6b8a91146a'
            'SKIP'
            '3bb7463471fb43b2163a705a79a13a3003d70fff4bbe44f467807ca056de9a75'
            '44be8e819b8334ed36e9410d62dbc6c16dd8f8329a191403bfdce3cf2e9181fc')
sha256sums+=('228b7d316ab6836a6e69aa7070033b1ae073f3579474a49d8c306702b1c1413e'
             'SKIP'
             '5cfcadbd168c52b1b1e3f2f2c45911a4ae1a9d8a05918be68475a31985607bd8'
             '0ed6b8efa00f73a96bceaba2d6a31fb11d416106729ab9b8289b191eb9acccfa'
             '714998c5fc379f54a66ff80a845b7880169cd5b4094b77b719a99d33b65c0940')
sha256sums_armv7h=('bc00516032330760444939c516a60c78f868631e1b37f075f0fe71a53737b966'
                   '2d4d91f7e35d0860225084e37ec320ca6cae669f6c9c8fe7735cdbd542e3a7c9')
sha256sums_i686=('bf2829f280ef05a608584ce7ec95875e147f315bac9609f5e18052bc03e3c4f9'
                 'e661665ee00ecec66c33e115b0af3474452022f0d8ceda634a6315dc8cb99014')
validpgpkeys=('14F26682D0916CDD81E37B6D61B7B526D98F0353') # Mozilla Software Releases <release@mozilla.com>
validpgpkeys+=('BFA8008A8265677063B11BF47171986E4B745536') # Andreas Grapentin
validpgpkeys+=('3954A7AB837D0EA9CFA9798925DB7D9B5A8D4B40') # bill-auger


_should_skip_pgo_armv7h=1
_should_skip_pgo_i686=1
_should_skip_pgo_x86_64=0
eval "_should_skip_pgo=\$_should_skip_pgo_${CARCH}"


prepare() {
  mkdir mozbuild
  cd firefox-$pkgver

  # https://bugzilla.mozilla.org/show_bug.cgi?id=1530052
  echo "applying 0001-Use-remoting-name-for-GDK-application-names.patch"
  patch -Np1 -i ../0001-Use-remoting-name-for-GDK-application-names.patch

  cat >../mozconfig <<END
ac_add_options --enable-application=browser
mk_add_options MOZ_OBJDIR=${PWD@Q}/obj

ac_add_options --prefix=/usr
ac_add_options --enable-release
ac_add_options --enable-hardening
ac_add_options --enable-optimize
ac_add_options --enable-rust-simd
ac_add_options --enable-linker=lld
ac_add_options --disable-elf-hack
export CC='clang --target=x86_64-unknown-linux-gnu'
export CXX='clang++ --target=x86_64-unknown-linux-gnu'
export AR=llvm-ar
export NM=llvm-nm
export RANLIB=llvm-ranlib

# Branding
ac_add_options --disable-official-branding
ac_add_options --with-branding=browser/branding/iceweasel
ac_add_options --enable-update-channel=release
ac_add_options --with-distribution-id=nu.parabola
ac_add_options --with-unsigned-addon-scopes=app,system
ac_add_options --allow-addon-sideload
export MOZ_APP_REMOTINGNAME=${pkgname//-/}
export MOZ_TELEMETRY_REPORTING=
export MOZ_REQUIRE_SIGNING=

# System libraries
ac_add_options --with-system-nspr
ac_add_options --with-system-nss

# Features
ac_add_options --enable-alsa
ac_add_options --enable-jack
ac_add_options --disable-crashreporter
ac_add_options --disable-updater
ac_add_options --disable-tests
ac_add_options --disable-eme
END


  ## [ARCH-SPECIFIC CONFIG] ##

  case ${CARCH} in
    armv7h)
      sed -i '
        /--enable-hardening/d
        /--enable-optimize/d
        /--enable-rust-simd/d
      ' ../mozconfig

      cat >>../mozconfig <<END
export CC=clang
export CXX=clang++
ac_add_options --disable-webrtc
ac_add_options --disable-elf-hack

# https://bugzilla.redhat.com/show_bug.cgi?id=1641623
ac_add_options --disable-av1
ac_add_options --enable-optimize="-g0 -O2"
END
# mk_add_options MOZ_MAKE_FLAGS=${MAKEFLAGS} # from archlinuxarm

      # mozbuild.configure.options.InvalidOptionError: --disable-eme is not available in this configuration
      # EME is disabled anyway in the built package, but better check if it exists for ARM each new release.
      sed -i 's|ac_add_options --disable-eme||' ../mozconfig

      echo "applying arm.patch"
      patch -p1 -i ../arm.patch
      echo "applying build-arm-libopus.patch"
      patch -p1 -i ../build-arm-libopus.patch
    ;;
    i686)
      # disable LTO and use gcc toolchain (clang has issues on IA32)
      # disable SIMD (SSE20 for i686)
      export MOZ_SOURCE_CHANGESET="DEVEDITION_${pkgver//./_}_RELEASE"
      cat >>../mozconfig <<END
ac_add_options --disable-linker=lld
ac_add_options --enable-linker=bfd
ac_add_options --disable-lto
ac_add_options --disable-rust-simd
export CC=gcc
export CXX=g++
export AR=gcc-ar
export NM=gcc-nm
export RANLIB=gcc-ranlib
END

      # readelf: Error: Unable to seek to 0x801db328 for section headers
      echo "applying avoid-libxul-OOM-python-check.patch"
      patch -p1 -i "$srcdir"/avoid-libxul-OOM-python-check.patch

      # test failure in rust code (complaining about network functions) when PGO is used,
      # see https://bugzilla.mozilla.org/show_bug.cgi?id=1565757
      echo "applying rust-static-disable-network-test-on-static-libraries.patch"
      patch -p1 -i "$srcdir"/rust-static-disable-network-test-on-static-libraries.patch
    ;;
    x86_64)
    ;;
    *) echo "no [ARCH-SPECIFIC CONFIG] for arch: ${CARCH}" ; return 1 ;
    ;;
  esac


  ## branding ##

  echo "applying parabola branding"
  local brandingsrcdir="${srcdir}/${pkgname}-${_brandingver}"
  local brandingdestdir=browser/branding/${pkgname}
  rm -rf -- ${brandingdestdir}
  cp -aT -- ${brandingsrcdir}/branding ${brandingdestdir}
  # TODO: dont know what aboutlogins.svg is supposed to be or where it is presented
  #         but it seems to be essential
  tee "${brandingdestdir}/content/aboutlogins.svg" \
      "${brandingdestdir}/content/about-logo.svg" < ${brandingdestdir}/iceweasel_logo.svg >/dev/null

  # custom new tab page
  # FIXME: the newtab page (aka "Start Page") has changed significantly
  #        the new upstream start page ('activity-streams') is an add-on now
  #        it must be forked and customized externally, then copied into the browser tree
  #        see: the branding-dev-build/ dir on the '68.0' branch of the branding git repo
  #        that will also be useful for creating a replacement 'mozilla-searchplugins' package
  #        some of the branding components above and commented out below may no longer be used
  #        the following section aims to restore something similar
  #          to the previous parabola-branded "start page"
  #        once it is working well, all of these comments should be removed
  #          and any unused branding components may be deleted from the branding package
  # Put "Start Page" branding images in the source code
  #install -m644 -t browser/base/content/abouthome -- \
  #  "${brandingsrcdir}/branding"/{drm-free,gnu_headshadow,parabola-banner}.png
  #install -m644 -t browser/extensions/onboarding/content/img -- \
  #   "${brandingsrcdir}/branding/watermark.svg"

  # produce icons
  for i in 16 22 24 32 48 64 128 192 256 384; do
    rsvg-convert -w $i -h $i "${brandingsrcdir}/branding/${pkgname}_icon.svg" \
      -o "${brandingdestdir}/default$i.png"
  done

  # apply branding patches
  export QUILT_PATCHES="${brandingsrcdir}"/patches
  export QUILT_REFRESH_ARGS='-p ab --no-timestamps --no-index'
  export QUILT_DIFF_ARGS='--no-timestamps'
  quilt push -av


  ## libre patching ##

  # Remove remaining non-free bits
  echo "applying libre.patch"
  patch -Np1 -i "$srcdir/libre.patch"

  # Disable various components at the source level
  sed -i 's/;1/;0/' toolkit/components/telemetry/components.conf
  sed -Ei 's/((MOZ_SERVICES_HEALTHREPORT|MOZ_NORMANDY).+)True/\1False/' browser/moz.configure
  #sed -i 's/;1/;0/' browser/experiments/Experiments.manifest
  #sed -i '/pocket/d'          browser/extensions/moz.build
  #sed -i '/activity-stream/d' browser/extensions/moz.build

  # Load custom searchplugins
  # FIXME: no longer applicable - replace with (broken) replacement fo libre/mozilla-searchplugins
  #        https://git.parabola.nu/packages/iceweasel.git/tree/branding-dev-build/mozilla-searchplugins?h=68.0
#   rm -rvf -- browser/components/search/searchplugins/{*.xml,images/}
#   cp -av -- /usr/lib/mozilla/searchplugins/* browser/components/search/searchplugins/

  # Patch search-engines config
  # FIXME: custom searchplugins ID per new format above ("ddg" is standard)
  #        browser/components/search/extensions/<ID>/
#   local _remove_engines_sed='s|.*oogle.*|          "ddg", "duckduckgo-html", "duckduckgo-lite", "internet-archive", "parabola-labs", "parabola-packages", "parabola-wiki-en", "searx", "wikipedia", "yacy"|g'
  local _remove_engines_sed='s|.*oogle.*|          "ddg", "wikipedia"|g'
  echo "applying libre-searchengines.patch"
  patch -Np1 -i "$srcdir/libre-searchengines.patch"

  pushd browser/components/search/extensions
  sed -i "${_remove_engines_sed}" list.json
  sed -i 's|https://duckduckgo.com/|https://html.duckduckgo.com/html/|' ddg/manifest.json

  # Sanity-check search-engines patching
  _removed_engines_regex='Bing|Google|Seznam|Twitter|Yahoo|Yandex|Яндекс|amazon|bing|google|ebay|twitter'
  _err_msg="search-engines patch needs re-working"
  ! grep -E ${_removed_engines_regex} list.json > /dev/null || ! echo "${_err_msg}"

  find -mindepth 1 -maxdepth 1 \
    -not -name ddg \
    -not -name wikipedia \
    -not -name list.json \
    -exec rm -rf {} \;
  popd

  # Removing What's New tab from Developer Tools, usages are removed by libre.patch
  rm -rf devtools/client/whats-new

  # Upstream tarball can contain some ignored cruft,
  # including binaries (for example, python3).
  echo 'Removing files specified in .gitignore...'
  git init && git clean -dfX \
    -e '!ipc/chromium/src/third_party/libevent/evconfig-private.h' \
    -e '!toolkit/crashreporter/google-breakpad/src/third_party/lss/' \
    -e '!third_party/python/**/*.egg-info/'
  rm -rf .git
}

_check_build_config() {
  echo "Checking build configuration..."

  # Configure produces mozinfo.json that reflects current configuration.
  # See build/docs/mozinfo.rst
  ./mach configure

  # In this test, jq collects values of the following keys of mozinfo.json into array,
  # and checks if any of them are not equal to false, in which case it returns "true".
  # E.g. if the value of any key is true or null (in case the key is missing from mozinfo.json),
  # that means the build configuration has to be reworked.
  local object_directory=$(./mach environment | sed -En '/object directory:/{n;s/^\s+//;p;}')
  local features_not_disabled=$(cat "$object_directory/mozinfo.json" \
   | jq -e '[.crashreporter, .datareporting, .healthreport, .normandy, .telemetry, .updater] | any(. != false)')
  if $features_not_disabled; then
    echo 'Some features are not disabled correctly in build configuration files, aborting.'
    return 1
  fi
}

build() {
  cd firefox-$pkgver

  export MOZ_NOSPAM=1
  export MOZBUILD_STATE_PATH="$srcdir/mozbuild"

  # LTO needs more open files
  ulimit -n 4096


  ## [ARCH-SPECIFIC BUILD ENV] ##

  case ${CARCH} in
    armv7h)
      # clang-9: error: unknown argument: '-fvar-tracking-assignments'
      CFLAGS="${CFLAGS/-fvar-tracking-assignments/}"
      CXXFLAGS="${CXXFLAGS/-fvar-tracking-assignments/}"

      export MOZ_DEBUG_FLAGS=" "
      export CFLAGS+=" -g0"
      export CXXFLAGS+=" -g0"
      export LDFLAGS+=" -Wl,--no-keep-memory"
      export RUSTFLAGS="-Cdebuginfo=0"
    ;;
    i686)
      # -fno-plt with cross-LTO -> LLVM ERROR: Function Import: link error
      CFLAGS="${CFLAGS/-fno-plt/}"
      CXXFLAGS="${CXXFLAGS/-fno-plt/}"

      # disable LTO (clang has issues on IA32)
      export RUSTFLAGS+=" -Cdebuginfo=0 -Clto=off"
      export LDFLAGS+=" -Wl,--no-keep-memory -Wl,--reduce-memory-overheads"

      # libvpx has some hard-coded compiler flags for MMX, SSE, SSE2, use the correct one
      # per CARCH (75.0 uses an intrisic _mm_empty now, which required the corresponding
      # architecture flag to be preset - before it was merely embedding some assembly
      # code with EMMS
      export CFLAGS+=" -mmmx"
      export CXXFLAGS+=" -mmmx"
    ;;
    x86_64)
      # -fno-plt with cross-LTO -> LLVM ERROR: Function Import: link error
      CFLAGS="${CFLAGS/-fno-plt/}"
      CXXFLAGS="${CXXFLAGS/-fno-plt/}"

      # clang-9 -> error: unknown argument: '-fvar-tracking-assignments'
      CFLAGS="${CFLAGS/-fvar-tracking-assignments/}"
      CXXFLAGS="${CXXFLAGS/-fvar-tracking-assignments/}"

      export CFLAGS
      export CXXFLAGS
    ;;
    *) echo "no [ARCH-SPECIFIC BUILD ENV] for arch: ${CARCH}" ; return 1 ;
    ;;
  esac


  ## [ARCH-SPECIFIC BUILD CONFIG] ##

  case ${CARCH} in
    armv7h)
    ;;
    i686)
      # avoid excessive debug symbols in rust leading to out-of-memory situations
      sed -i "s/debug_info = '\''2'\''/debug_info = '\''0'\''/" build/moz.configure/toolchain.configure
    ;;
    x86_64)
    ;;
    *) echo "no [ARCH-SPECIFIC BUILD CONFIG] for arch: ${CARCH}" ; return 1 ;
    ;;
  esac

  if (( $_should_skip_pgo ))
  then
    # skipping "3-tier PGO" "instrumented browser", to avoid OOM problems;
    # so we have the final .mozconfig now
    cp ../mozconfig .mozconfig
  else
    # Do 3-tier PGO
    echo "Building instrumented browser..."
    cat >.mozconfig ../mozconfig - <<END
ac_add_options --enable-profile-generate=cross
END
    _check_build_config
    ./mach build

    echo "Profiling instrumented browser..."
    ./mach package
    LLVM_PROFDATA=llvm-profdata \
      JARLOG_FILE="$PWD/jarlog" \
      xvfb-run -s "-screen 0 1920x1080x24 -nolisten local" \
      ./mach python build/pgo/profileserver.py

    stat -c "Profile data found (%s bytes)" merged.profdata
    test -s merged.profdata

    stat -c "Jar log found (%s bytes)" jarlog
    test -s jarlog

    echo "Removing instrumented browser..."
    ./mach clobber

    cat >.mozconfig ../mozconfig - <<END
ac_add_options --enable-lto=cross
ac_add_options --enable-profile-use=cross
ac_add_options --with-pgo-profile-path=${PWD@Q}/merged.profdata
ac_add_options --with-pgo-jarlog=${PWD@Q}/jarlog
END
  fi # $_skip_pgo


  ## sanity checks ##

  # each of the [ARCH-SPECIFIC BUILD CONFIG] branches above should have created .mozconfig
  [[ ! -f .mozconfig ]] && echo ".mozconfig file not found in source root" && return 1

  _check_build_config
  echo "Building optimized browser..."
  ./mach build

  echo "Building symbol archive..."
  ./mach buildsymbols
}

package() {
  cd firefox-$pkgver
  DESTDIR="$pkgdir" ./mach install

  local vendorjs="$pkgdir/usr/lib/$pkgname/browser/defaults/preferences/vendor.js"
  install -Dvm644 /dev/stdin "$vendorjs" <<END
// Use LANG environment variable to choose locale
pref("intl.locale.requested", "");

// Use system-provided dictionaries
pref("spellchecker.dictionary_path", "/usr/share/hunspell");

// Disable default browser checking.
pref("browser.shell.checkDefaultBrowser", false);

// Don't disable extensions in the application directory
pref("extensions.autoDisableScopes", 11);
END

  # Parabola additions to vendor.js
  local _shortver=$(cut -d. -f1,2 <<<"$pkgver")
  cat "${srcdir}"/vendor.js.in >> "$vendorjs"
  sed -i "s|@_SHORTVER_@|$_shortver|g" "$vendorjs"

  local distini="$pkgdir/usr/lib/$pkgname/distribution/distribution.ini"
  install -Dvm644 /dev/stdin "$distini" <<END
[Global]
id=parabola
version=1.0
about=Iceweasel for Parabola GNU/Linux-libre

[Preferences]
app.distributor=parabola
app.distributor.channel=$pkgname
app.partner.parabola=parabola
END

  local i
  for i in 16 22 24 32 48 64 128 192 256 384; do
    install -Dvm644 browser/branding/$pkgname/default$i.png \
      "$pkgdir/usr/share/icons/hicolor/${i}x${i}/apps/$pkgname.png"
  done
  install -Dvm644 "browser/branding/$pkgname/${pkgname}_icon.svg" \
    "$pkgdir/usr/share/icons/hicolor/scalable/apps/$pkgname.svg"

  install -Dvm644 ../$pkgname.desktop \
    "$pkgdir/usr/share/applications/$pkgname.desktop"

  # Install a wrapper to avoid confusion about binary path
  install -Dvm755 /dev/stdin "$pkgdir/usr/bin/$pkgname" <<END
#!/bin/sh
exec /usr/lib/$pkgname/$pkgname "\$@"
END


  ## [ARCH-SPECIFIC INSTALL] ##

  case ${CARCH} in
    armv7h)
    ;;
    i686)
      # libxul.so cannot find it's libraries
      install -dm 755 "${pkgdir}"/etc/ld.so.conf.d
      echo "/usr/lib/${pkgname}" > "${pkgdir}"/etc/ld.so.conf.d/${pkgname}.conf
    ;;
    x86_64)
    ;;
    *) echo "no [ARCH-SPECIFIC INSTALL] for arch: ${CARCH}" ; return 1 ;
    ;;
  esac

  # Replace duplicate binary with wrapper
  # https://bugzilla.mozilla.org/show_bug.cgi?id=658850
  ln -srfv "$pkgdir/usr/bin/$pkgname" "$pkgdir/usr/lib/$pkgname/$pkgname-bin"

  # Use system certificates
  local nssckbi="$pkgdir/usr/lib/$pkgname/libnssckbi.so"
  if [[ -e $nssckbi ]]; then
    ln -srfv "$pkgdir/usr/lib/libnssckbi.so" "$nssckbi"
  fi
}