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#!/bin/bash
# $Id$
# Copyright 2013, 2014, 2015, 2016, 2017  Eric Hameleers, Eindhoven, NL
# All rights reserved.
#
#   Permission to use, copy, modify, and distribute this software for
#   any purpose with or without fee is hereby granted, provided that
#   the above copyright notice and this permission notice appear in all
#   copies.
#
#   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
#   WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#   MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
#   IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
#   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
#   USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
#   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
#   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
#   OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
#   SUCH DAMAGE.
#
# -----------------------------------------------------------------------------
#
# Slackware SlackBuild script 
# ===========================
# By:          Eric Hameleers <alien@slackware.com>
# For:         chromium
# Descr:       Open Source version of Chrome Web Browser
# URL:         http://www.chromium.org/
# Build needs: - multilib gcc & glibc for compiling the Native Client (64-bit);
#              - libelf with '-D_FILE_OFFSET_BITS=64' added to CFLAGS (32-bit);
#              - libtinfo (provides symlinks required by downloaded clang);
#              - ninja;
#              - nodejs;
#              - gcc >= 5.4.0 unless you compile using clang
#              - Internet access (for downloading the nacl/pnacl toolchain bins)
# Needs:       
# Changelog:   
# 31.0.1650.57-1:
#              18/nov/2013 by Eric Hameleers <alien@slackware.com>
#              * Initial build.
# 31.0.1650.63-1:
#              18/Nov/2013 by Eric Hameleers <alien@slackware.com>
# 31.0.1650.67-1:
#              19/dec/2013 by Eric Hameleers <alien@slackware.com>
#              * Update comes with several security fixes.
# 32.0.1700.77-1:
#              14/jan/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with several security fixes.
# 32.0.1700.102-1:
#              29/jan/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with several security fixes.
# 32.0.1700.107-1:
#              04/feb/2014 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 33.0.1750.117-1:
#              21/feb/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with several security fixes.
# 33.0.1750.146-1:
#              04/mar/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with several security fixes.
# 33.0.1750.149-1:
#              11/mar/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with several security fixes.
# 33.0.1750.152-1:
#              18/mar/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with several security fixes.
# 34.0.1847.116-1:
#              09/apr/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with several security fixes.
# 34.0.1847.132-1:
#              25/apr/2014 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 34.0.1847.137-1:
#              14/may/2014 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 35.0.1916.114-1:
#              20/may/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with several security fixes.
# 35.0.1916.153-1:
#              10/jun/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with several security fixes.
# 36.0.1985.125-1:
#              16/jun/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with several security fixes.
#                We can no longer download the toolchain binaries in advance,
#                so the build will now require internet connectivity.
# 36.0.1985.143-1:
#              12/aug/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with security fixes, Chrome also comes with an
#                updated Flash plugin: 14.0.0.177.
# 37.0.2062.94-1:
#              27/aug/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with security fixes, New: an embedded PDF viewer.
# 37.0.2062.120-1:
#              09/sep/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with security fixes, Chrome also comes with an
#                updated Flash plugin: 15.0.0.152.
# 38.0.2125.101-1:
#              08/oct/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with security fixes.
# 38.0.2125.104-1:
#              18/oct/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with security fixes. Chrome also updates its
#                Flash plugin to 15.0.0.189.
# 38.0.2125.111-1:
#              28/oct/2014 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 38.0.2125.122-1:
#              11/nov/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with security fixes. Chrome also updates its
#                Flash plugin to 15.0.0.223.
# 39.0.2171.65-1:
#              17/nov/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with security fixes.  See
#                http://googlechromereleases.blogspot.nl/2014/11/stable-channel-update_18.html
# 39.0.2171.71-1:
#              26/nov/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with security fixes. Chrome also updates its
#                Flash plugin to 15.0.0.239.
# 39.0.2171.95-1:
#              09/dec/2014 by Eric Hameleers <alien@slackware.com>
#              * Update comes with security fixes. Chrome also updates its
#                Flash plugin to 16.0.0.235.
# 39.0.2171.95-2:
#              01/jan/2015 by Eric Hameleers <alien@slackware.com>
#              * Add support for the WIdevine CDM plugin (i.e. Netflix playback)
# 39.0.2171.99-1:
#              14/jan/2015 by Eric Hameleers <alien@slackware.com>
#              * New release accompanied by pepperflash 16.0.0.257. 
# 40.0.2214.91-1:
#              21/jan/2015 by Eric Hameleers <alien@slackware.com>
#              * New release.
# 40.0.2214.111-1:
#              06/feb/2015 by Eric Hameleers <alien@slackware.com>
# 41.0.2272.76-1:
#              05/mar/2015 by Eric Hameleers <alien@slackware.com>
#              * First release of Chromium 41 stable.
# 41.0.2272.118-1:
#              02/apr/2015 by Eric Hameleers <alien@slackware.com>
#              * Security update.
# 42.0.2311.90-1:
#              15/apr/2015 by Eric Hameleers <alien@slackware.com>
#              * First release of Chromium 42 stable.
# 42.0.2311.135-1:
#              30/apr/2015 by Eric Hameleers <alien@slackware.com>
#              * Security update.
# 43.0.2357.65-1:
#              20/may/2015 by Eric Hameleers <alien@slackware.com>
#              * Security update, first 43 version.
# 43.0.2357.81-1:
#              29/may/2015 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 43.0.2357.124-1:
#              09/jun/2015 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 43.0.2357.125-1:
#              12/jun/2015 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 43.0.2357.125-2:
#              19/jun/2015 by Eric Hameleers <alien@slackware.com>
#              * Disable "OK Google" hotwording completely.
# 43.0.2357.130-1:
#              22/jun/2015 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 43.0.2357.130-2:
#              25/jun/2015 by Eric Hameleers <alien@slackware.com>
#              * Fix broken password manager in KDE.
# 43.0.2357.132-1:
#              08/jul/2015 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 43.0.2357.134-1:
#              15/jul/2015 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 44.0.2403.89-1:
#              22/jul/2015 by Eric Hameleers <alien@slackware.com>
#              * Update - first 44 release.
# 44.0.2403.107-1:
#              25/jul/2015 by Eric Hameleers <alien@slackware.com>
#              * Update - emergency bugfix release.
# 44.0.2403.155-1:
#              11/aug/2015 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 44.0.2403.157-1:
#              21/aug/2015 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 45.0.2454.85-1:
#              02/sep/2015 by Eric Hameleers <alien@slackware.com>
#              * Update - first 45 release.
# 45.0.2454.93-1:
#              16/sep/2015 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 45.0.2454.101-1:
#              25/sep/2015 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 46.0.2490.71-1:
#              14/oct/2015 by Eric Hameleers <alien@slackware.com>
#              * First 46 release.
# 46.0.2490.86-1:
#              22/nov/2015 by Eric Hameleers <alien@slackware.com>
#              * Security update.
# 47.0.2526.73-1:
#              03/dec/2015 by Eric Hameleers <alien@slackware.com>
#              * First 47 release.
# 48.0.2564.82-1:
#              24/jan/2016 by Eric Hameleers <alien@slackware.com>
#              * First 48 release.
# 48.0.2564.97-1:
#              31/jan/2016 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 48.0.2564.109-1:
#              13/feb/2016 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 49.0.2623.75-1:
#              05/mar/2016 by Eric Hameleers <alien@slackware.com>
#              * First 49 release.  Binary plugins such as widevine and
#                pepperflash are no longer available for 32-bit since
#                Google stopped providing binaries for 32-bit Chrome.
# 49.0.2623.108-1:
#              25/feb/2016 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 49.0.2623.112-1:
#              08/apr/2016 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 50.0.2661.75-1:
#              14/apr/2016 by Eric Hameleers <alien@slackware.com>
#              * First 50 release.
# 50.0.2661.94-1:
#              29/apr/2016 by Eric Hameleers <alien@slackware.com>
#              * Security update.
# 50.0.2661.102-1:
#              12/may/2016 by Eric Hameleers <alien@slackware.com>
#              * Security update.
# 51.0.2704.63-1:
#              26/may/2016 by Eric Hameleers <alien@slackware.com>
#              * First 51 release.
# 51.0.2704.84-1:
#              07/jun/2016 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 51.0.2704.103-1:
#              17/jun/2016 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 52.0.2743.82-1:
#              24/jul/2016 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 52.0.2743.116-1:
#              04/aug/2016 by Eric Hameleers <alien@slackware.com>
#              * Update.
# 53.0.2785.92-1:
#              06/sep/2016 by Eric Hameleers <alien@slackware.com>
#              * First 53 release.
# 53.0.2785.92-2:
#              12/sep/2016 by Eric Hameleers <alien@slackware.com>
#              * Apply patch required for Slackware 14.1.
# 54.0.2840.90-1:
#              03/nov/2016 by Eric Hameleers <alien@slackware.com>
#              * First 54 release. Build system changed from gyp to gn.
# 54.0.2840.100-1:
#              17/nov/2016 by Eric Hameleers <alien@slackware.com>
#              * Updated. Security fix. Removed the VAAPI patch because
#                several people have issues with it.
# 55.0.2883.75-1:
#              12/dec/2016 by Eric Hameleers <alien@slackware.com>
#              * First 55 release.
# 56.0.2924.76-1:
#              30/jan/2017 by Eric Hameleers <alien@slackware.com>
#              * First 56 release.
# 56.0.2924.76-2:
#              25/feb/2017 by Eric Hameleers <alien@slackware.com>
#              * Built for Slackware 14.1 with some additional patches.
# 57.0.2987.98-1:
#              14/mar/2017 by Eric Hameleers <alien@slackware.com>
#              * First 57 release.
# 58.0.3029.96-1:
#              04/may/2017 by Eric Hameleers <alien@slackware.com>
#              * Update to 58.
# 59.0.3071.86-1:
#              06/jun/2017 by Eric Hameleers <alien@slackware.com>
#              * Update to 59.
# 60.0.3112.78-1:
#              25/jun/2017 by Eric Hameleers <alien@slackware.com>
#              * Update to 60.
# 61.0.3163.79-1:
#              11/sep/2017 by Eric Hameleers <alien@slackware.com>
#              * Update to 61.
# 61.0.3163.100-1:
#              25/sep/2017 by Eric Hameleers <alien@slackware.com>
#              * Security update.
# 62.0.3202.62-1:
#              18/oct/2017 by Eric Hameleers <alien@slackware.com>
#              * Update to 62.
# 62.0.3202.75-1:
#              27/oct/2017 by Eric Hameleers <alien@slackware.com>
#              * Update, switch compiler to clang instead of gcc.
# 
# -----------------------------------------------------------------------------
# 
# Run 'sh chromium.SlackBuild' to build a Slackware package.
# The package (.txz) and .txt file as well as build logs are created in /tmp .
# Install it using 'installpkg'. 
#
# -----------------------------------------------------------------------------

SRCNAM=chromium
SRCEXT=${SRCEXT:-""}             # could be "-dev" for development build
PRGNAM=${SRCNAM}${SRCEXT}        # chromium or chromium-dev
VERSION=${VERSION:-62.0.3202.75}
BUILD=${BUILD:-1}
TAG=${TAG:-alien}

# Differentiate between stable and development releases:
if [ "x$SRCEXT" = "x-dev" ]; then
  CRFLAGS="CHROMIUM_DEV_FLAGS"
  CRUSERFLAGS="CHROMIUM_DEV_USER_FLAGS"
else
  CRFLAGS="CHROMIUM_FLAGS"
  CRUSERFLAGS="CHROMIUM_USER_FLAGS"
fi

# If pulseaudio is installed we support it unless you explicitly disable it:
if /usr/bin/pkg-config --exists libpulse 2>/dev/null ; then
  USE_PA=${USE_PA:-1}
else
  USE_PA=${USE_PA:-0}
fi

# By default the ffmpeg library is built statically into the chromium binary.
# You can also build a shared library libffmpeg.so (formerly libffmpegsumo.so):
USE_FFMPEG=${USE_FFMPEG:-shared} # other option is "static"

# You can build without NaCl (native client) if you set USE_NACL to "0",
# but you'll lose some Chrome functionality like using in-browser applications.
# Note that NaCl is only supported on 64bit, and will be obsoleted in 2018
# in favor of WebAssembly:
USE_NACL=${USE_NACL:-1}

# Use the clang compiler. Results in faster build and smaller binaries.
# This default to "1" (on) because gcc support is getting stale
# and the gcc of Slackware 14.2 is already too old.
# This script will compile google's modified clang from source, so that 32bit
# can be supported (Google offers only 64bit pre-built clang for download0:
USE_CLANG=${USE_CLANG:-1}

# If you don't want to enable support for Widevine CDM
# (content decryption module) say "0" here.
USE_CDM=${USE_CDM:-1}

# If you are OK with the "OK Google" hotwording feature which will
# automatically download a binary blob with proprietary code, set this to "1".
# Some people object to a download without consent so it is disabled by default:
USE_HOTWORD=${USE_HOTWORD:-0}

DOCS="AUTHORS BUILD.gn CODE_OF_CONDUCT.md DEPS LICENSE* OWNERS WATCHLISTS README*"

# Where do we look for sources?
SRCDIR=$(cd $(dirname $0); pwd)

# Place to build (TMP) package (PKG) and output (OUTPUT) the program:
TMP=${TMP:-/tmp/build}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

# Visible directory listing of anything Chrome related is:
#   http://gsdview.appspot.com/
# Official location (non-browsable) of the above is:
#   https://commondatastorage.googleapis.com/

# This package is built with Alien's Google API keys for Chromium.
# The keys are contained in the file "chromium_apikeys".
# If you want to rebuild this package, you can use my API keys, however:
# you are not allowed to re-distribute these keys!!
# You can also obtain your own, see:
#   http://www.chromium.org/developers/how-tos/api-keys
# Or else you can simply compile without API keys. This will disable stuff like
# browser sync and other functionality which accesses Google APIs. 
# The following variables must be set:
#   _google_api_key
#   _google_default_client_id
#   _google_default_client_secret
if [ -f ${HOME}/.chromium_apikeys ]; then
  . ${HOME}/.chromium_apikeys
elif [ -f ${SRCDIR}/chromium_apikeys ]; then
  . ${SRCDIR}/chromium_apikeys
else
  _google_api_key=" "
  _google_default_client_id=" "
  _google_default_client_secret=" "
  cat <<EOT
No values were defined for the following variables:
   _google_api_key
   _google_default_client_id
   _google_default_client_secret
Please supply your own Google API keys for Chromium!
Press Ctrl-C to abort this script or wait 10 seconds to continue anyway.
EOT
sleep 10
fi

##
## --- with a little luck, you won't have to edit below this point --- ##
##

# Automatically determine the architecture we're building on:
MARCH=$( uname -m )
if [ -z "$ARCH" ]; then
  case "$MARCH" in
    i?86)    export ARCH=i586 ;;
    armv7hl) export ARCH=$MARCH ;;
    armv6hl) export ARCH=$MARCH ;;
    arm*)    export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
    *)       export ARCH=$MARCH ;;
  esac
fi

case "$ARCH" in
  i?86)      SLKCFLAGS="-O2 -march=${ARCH} -mtune=i686"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             RPMARCH="i386"
             DSSE="1"
             ;;
  x86_64)    SLKCFLAGS="-O2 -fPIC"
             SLKLDFLAGS="-L/usr/lib64"; LIBDIRSUFFIX="64"
             RPMARCH="x86_64"
             #DSSE="0"
             DSSE="1"
             ;;
  armv7hl)   SLKCFLAGS="-O2 -march=armv7-a -mfpu=vfpv3-d16"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             DSSE="1"
             # Widevine not supported (no binary library available):
             USE_CDM=0
             ;;
  armv6hl)   SLKCFLAGS="-O2 -march=armv6 -mfpu=vfp -mfloat-abi=hard"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             DSSE="1"
             # Widevine not supported (no binary library available):
             USE_CDM=0
             ;;
  *)         SLKCFLAGS=${SLKCFLAGS:-"O2"}
             SLKLDFLAGS=${SLKLDFLAGS:-""}; LIBDIRSUFFIX=${LIBDIRSUFFIX:-""}
             DSSE="1"
             # Widevine not supported by default:
             USE_CDM=0
             ;;
esac

case "$ARCH" in
    arm*)    TARGET=$ARCH-slackware-linux-gnueabi ;;
    *)       TARGET=$ARCH-slackware-linux ;;
esac

# Exit the script on errors:
set -e
trap 'echo "$0 FAILED at line ${LINENO}" | tee $OUTPUT/error-${PRGNAM}.log' ERR
# Catch unitialized variables:
set -u
P1=${1:-1}

# Save old umask and set to 0022:
_UMASK_=$(umask)
umask 0022

# Source locations:
SOURCE[0]="$SRCDIR/${SRCNAM}-${VERSION}.tar.xz"
SRCURL[0]="https://commondatastorage.googleapis.com/${SRCNAM}-browser-official/${SRCNAM}-${VERSION}.tar.xz"

SOURCE[1]="$SRCDIR/widevine-version.txt"
SRCURL[1]="https://redirector.gvt1.com/edgedl/widevine-cdm/current.txt"

# Create working directories:
mkdir -p $OUTPUT          # place for the package to be saved
mkdir -p $TMP/tmp-$PRGNAM # location to build the source
mkdir -p $PKG             # place for the package to be built
rm -rf $PKG/*             # always erase old package's contents
rm -rf $TMP/tmp-$PRGNAM/* # remove the remnants of previous build
rm -rf $OUTPUT/{configure,make,install,error,makepkg,patch}-$PRGNAM.log
                          # remove old log files

# Source file availability:
for (( i = 0; i < ${#SOURCE[*]}; i++ )) ; do
  if ! [ -f ${SOURCE[$i]} ]; then
    echo "Source '$(basename ${SOURCE[$i]})' not available yet..."
    # Check if the $SRCDIR is writable at all - if not, download to $OUTPUT
    [ -w "$SRCDIR" ] || SOURCE[$i]="$OUTPUT/$(basename ${SOURCE[$i]})"
    if [ -f ${SOURCE[$i]} ]; then echo "Ah, found it!"; continue; fi
    if ! [ "x${SRCURL[$i]}" == "x" ]; then
      echo "Will download file to $(dirname $SOURCE[$i])"
      wget --no-check-certificate -nv -T 20 -O "${SOURCE[$i]}" "${SRCURL[$i]}" || true
      if [ $? -ne 0 -o ! -s "${SOURCE[$i]}" ]; then
        echo "Fail to download '$(basename ${SOURCE[$i]})'. Aborting the build."
        mv -f "${SOURCE[$i]}" "${SOURCE[$i]}".FAIL
        exit 1
      fi
    else
      echo "File '$(basename ${SOURCE[$i]})' not available. Aborting the build."
      exit 1
    fi
  fi
done

if [ "$P1" == "--download" ]; then
  echo "Download complete."
  exit 0
fi

# --- PACKAGE BUILDING ---

echo "++"
echo "|| $PRGNAM-$VERSION"
echo "++"

# Find the version of Widevine:
WIDEVINE_VERSION="1.4.8.$(cat ${SOURCE[1]})"

cd $TMP/tmp-$PRGNAM
echo "Extracting the source archive(s) for $PRGNAM..."
tar -xf ${SOURCE[0]}
cd ${SRCNAM}-${VERSION}

# Patches:
touch $OUTPUT/patch-${PRGNAM}.log
# Fix bootstrapping 'gn':
cat $SRCDIR/patches/chromium-gn-bootstrap-r17.patch | patch -p1 --verbose \
  2>&1 | tee -a $OUTPUT/patch-${PRGNAM}.log
# Fix compilation with gcc5:
cat $SRCDIR/patches/chromium_gcc5.patch | patch -p1 --verbose \
  2>&1 | tee -a $OUTPUT/patch-${PRGNAM}.log
# Fix compiling against glibc 2.26:
cat $SRCDIR/patches/chromium_glibc226.patch | patch -p1 --verbose \
  2>&1 | tee -a $OUTPUT/patch-${PRGNAM}.log
# Fix incorrect inclusion of <string_view> in modes other than >= C++17
cat $SRCDIR/patches/crc32c-string-view-check.patch \
  | patch -p1 --verbose -d third_party/crc32c/src \
  2>&1 | tee -a $OUTPUT/patch-${PRGNAM}.log
# When compiling google's clang on 32bit Slackware use 'i586' in the triplet.
# I am a python noob so this is clumsy, better implementation is welcome :-)
cp $SRCDIR/patches/clang.toolchains.i586.triple.diff .
cat $SRCDIR/patches/chromium_32bit_triplet.patch | patch -p0 --verbose \
  2>&1 | tee -a $OUTPUT/patch-${PRGNAM}.log
# When compiling google's clang, use the system cmake
# (prebuilt binary from google is only available as 64bit):
cat $SRCDIR/patches/chromium_use_system_cmake.patch | patch -p0 --verbose \
  2>&1 | tee -a $OUTPUT/patch-${PRGNAM}.log
# Don't crap out when gzip does not support '--rsyncable' (Slackware < 14.2):
if ! gzip --help |grep -q rsyncable ; then
  cat $SRCDIR/patches/chromium_no_rsyncable.patch | patch -p1 --verbose \
    2>&1 | tee -a $OUTPUT/patch-${PRGNAM}.log
fi
## Enable VAAPI hardware decoding on Linux platform:
#cat $SRCDIR/patches/chromium_vaapi.patch | patch -p1 --verbose \
#  2>&1 | tee -a $OUTPUT/patch-${PRGNAM}.log

# Also needed for Slackware <= 14.2:
if [ $(LC_ALL=C gcc -dumpversion |cut -d. -f1) -eq 4 ]; then
  cat $SRCDIR/patches/chromium56_gcc4.patch | patch -p1 --verbose \
    2>&1 | tee -a $OUTPUT/patch-${PRGNAM}.log
fi

# Explicitly use Python 2:
find . -name '*.py' -exec sed -i -r 's|/usr/bin/python$|&2|g' {} +

# The above does not solve every invocation of python:
mkdir -p $TMP/tmp-$PRGNAM/privatebin
ln -sf /usr/bin/python2 $TMP/tmp-$PRGNAM/privatebin/python

# Prevent a build failure (yes, 'x64' even on 32bit Slackware):
mkdir -p third_party/node/linux/node-linux-x64/bin
ln -s /usr/bin/node third_party/node/linux/node-linux-x64/bin/

if [ "$ARCH" != "x86_64" ]; then
  # For now, disable NaCl except on x86_64 because the precompiled toolchain is
  # only available for that architecture at the moment.
  echo "** Not building NaCL - architecture '$ARCH' is currently unsupported."
  USE_NACL=0
fi

if [ $USE_CDM -eq 1 ]; then
  # Add support for widevine cdm to this build.
  # Note that the resulting Slackware package will *not* include the
  # proprietary Widevine CDM, only the adapter library which is built from OSS.
  # To compile, we just add one #define - see https://crbug.com/473866
  sed '14i#define WIDEVINE_CDM_VERSION_STRING "'$WIDEVINE_VERSION'"' \
    -i third_party/widevine/cdm/stub/widevine_cdm_version.h
fi

if [ "x$SRCEXT" = "x-dev" ]; then
  # Save configuration in ~/.config/chromium-dev":
  sed -e "s|'filename': 'chromium-browser'|'filename': '${PRGNAM}'|" \
      -e "s|'confdir': 'chromium'|'confdir': '${PRGNAM}'|" \
      -i chrome/BUILD.gn
  sed -e 's|config_dir.Append("chromium")|config_dir.Append("'${PRGNAM}'")|' \
      -e 's|config_dir.Append("chrome-frame")|config_dir.Append("'chrome-frame$SRCEXT}'")|' \
      -i chrome/common/chrome_paths_linux.cc
fi

chown -R root:root .
chmod -R u+w,go+r-w,a+X-s .

echo Building ...

[ ${USE_CLANG} -eq 1 ] && do_clang=true || do_clang=false
[ ${USE_CDM} -eq 1 ] && do_cdm=true || do_cdm=false
[ ${USE_HOTWORD} -eq 1 ] && do_hotword=true || do_hotword=false
[ ${USE_NACL} -eq 1 ] && do_nacl=true || do_nacl=false
[ ${USE_PA} -eq 1 ] && do_pa=true || do_pa=false

export -n LDFLAGS="$SLKLDFLAGS"
export -n CXXFLAGS="$SLKCFLAGS"
export -n CFLAGS="$SLKCFLAGS -Wno-unused-local-typedefs"
export PATH="$TMP/tmp-$PRGNAM/privatebin:$PATH"

_chromium_conf=(
    "clang_use_chrome_plugins=false"
    'enable_hangout_services_extension=true'
    'enable_hidpi=true'
    "enable_hotwording=${do_hotword}"
    'enable_glibc=false'
    "enable_nacl=${do_nacl}"
    "enable_nacl_nonsfi=${do_nacl}"
    'enable_pepper_cdms=true'
    'enable_swiftshader=false'
    'enable_webrtc=true'
    "enable_widevine=${do_cdm}"
    'exclude_unwind_tables=true'
    'fatal_linker_warnings=false'
    'ffmpeg_branding="Chrome"'
    "ffmpeg_component=\"${USE_FFMPEG}_library\""
    'fieldtrial_testing_like_official_build=true'
    "google_api_key=\"$_google_api_key\""
    "google_default_client_id=\"$_google_default_client_id\""
    "google_default_client_secret=\"$_google_default_client_secret\""
    "is_clang=${do_clang}"
    'is_debug=false'
    "linux_sandbox_path=\"/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/chrome_sandbox\""
    'linux_strip_binary=true'
    'linux_use_bundled_binutils=false'
    'linux_use_bundled_gold=false'
    'linux_use_gold_binary=false'
    'linux_use_gold_flags=false'
    'logging_like_official_build=true'
    'proprietary_codecs=true'
    'remove_webcore_debug_symbols=true'
    'treat_warnings_as_errors=false'
    "usb_ids_path=\"/usr/share/hwdata/usb.ids\""
    'use_allocator="none"'
    'use_cups=true'
    'use_custom_libcxx=false'
    'use_gconf=false'
    'use_gio=false'
    'use_gold=false'
    'use_kerberos=false'
    "use_pulseaudio=${do_pa}"
    'use_sysroot=false'
)

    # Change this back when CRBUG 592268 is fixed (error during final link:
    # undefined reference to `base::i18n::GetRawIcuMemory())
    # See https://bugs.chromium.org/p/chromium/issues/detail?id=592268
    # icu_use_data_file_flag=false

gn_system_libraries=(
  # 'bzip2'
  # 'ffmpeg'
  'flac'
  # 'harfbuzz'
  # 'icu'
  # 'libevent'
  # 'libjpeg'
  # 'libpng'
  # 'libxml'
  # 'libxslt'
  # 'opus'
  # 'snappy'
  'yasm'
  # 'zlib'
  )

# Unbundle the libraries which we use from the system.
# (taken from Arch Linux:)
# This *should* do what the remove_bundled_libraries.py script does,
# with the added benefit of not having to list all the remaining libraries:
echo "-- Unbundling system libraries from $PRGNAM sources."
for ULIB in ${gn_system_libraries[@]}; do
  find -type f -path "*third_party/$ULIB/*" \
    \! -path "*third_party/$ULIB/chromium/*" \
    \! -path "*third_party/$ULIB/google/*" \
    \! -regex '.*\.\(gn\|gni\|isolate\|py\)' \
    -delete
done

# Change bundled libraries to system ones:
echo "-- Change bundled to system libraries in $PRGNAM sources."
python2 build/linux/unbundle/replace_gn_files.py --system-libraries ${gn_system_libraries[@]}

# Do not make the build fail, see Chromium issue #386097:
python2 third_party/libaddressinput/chromium/tools/update-strings.py \
  2>&1 | tee $OUTPUT/update_strings-${PRGNAM}.log

# Use usb.ids at run time instead of compiling it in:
sed -i device/usb/BUILD.gn \
  -e 's|//third_party/usb_ids/usb.ids|/usr/share/hwdata/usb.ids|g'

# Do not make the build fail, see https://groups.google.com/a/chromium.org/d/topic/chromium-packagers/9JX1N2nf4PU/discussion :
touch chrome/test/data/webui/i18n_process_css_test.html

# Do not make the build fail:
if [ ! -f chrome/test/data/webui_test_resources.grd ]; then
cat <<EOF >chrome/test/data/webui_test_resources.grd
<?xml version="1.0" encoding="UTF-8"?>
<grit latest_public_release="0" current_release="1">
  <outputs>
    <output filename="chrome/test/data/grit/webui_test_resources.h" type="rc_header">
      <emit emit_type='prepend'></emit>
    </output>
    <output filename="webui_test_resources.pak" type="data_package" />
  </outputs>
  <release seq="1">
  </release>
</grit>
EOF
fi

# Download the NaCL toolchains:
if [ ${USE_NACL} -eq 1 ]; then
  # We do not need arm_trusted on x86:
  echo "-- Downloading NaCL toolchains."
  python2 build/download_nacl_toolchains.py --packages nacl_x86_newlib,pnacl_newlib,pnacl_translator sync --extract \
    2>&1 | tee $OUTPUT/nacl_dl-${PRGNAM}.log
fi
# Download and compile google's clang sources if needed
# (clang is required for building NaCl):
if [ ${USE_CLANG} -eq 1 -o ${USE_NACL} -eq 1 ]; then
  # Build clang from source instead of downloading:
  echo "-- Building google's clang toolchain."
  python2 tools/clang/scripts/update.py \
    --force-local-build --gcc-toolchain=/usr --without-android \
    2>&1 | tee $OUTPUT/clang_build-${PRGNAM}.log
fi

# Generate the ninja build files:
echo "-- Bootstrapping 'gn'."
python2 tools/gn/bootstrap/bootstrap.py \
  -v --gn-gen-args "${_chromium_conf[*]}" \
  2>&1 | tee $OUTPUT/gyp-${PRGNAM}.log
echo "-- Generating ninja build files."
out/Release/gn gen out/Release -v --args="${_chromium_conf[*]}" \
  2>&1 | tee -a $OUTPUT/gyp-${PRGNAM}.log

# Compile everything:
echo "-- Compiling the lot."

if [ "$USE_CLANG" = "1" ]; then
  # clang_use_chrome_plugins=true fails with clang 3.5 - disable for now.
  export CC="clang"
  export CXX="clang++"
else
  # Be careful not to override CC and CXX (may have been set by gcc5):
  export CC=${CC:-"gcc"}
  export CXX=${CXX:-"g++"}
fi
export AS=as
export AR=ar

LC_ALL=C \
ninja -C out/Release \
  pdf chrome chrome_sandbox chromedriver widevinecdmadapter clearkeycdm \
  2>&1 | tee $OUTPUT/ninja-${PRGNAM}.log

# Manually install everything:
echo "-- Manually installing everything."

# The main binary:
install -D out/Release/chrome $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/${PRGNAM}

# The sandbox:
install -D -m4755 -o root -g root out/Release/chrome_sandbox \
  $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/chrome-sandbox

# The Chromium implementation of the WebDriver wire protocol
# (automated testing of web apps):
install -D out/Release/chromedriver $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/chromedriver

# Copy over the remaining binaries:
cp -a \
  out/Release/*.pak \
  $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/
if [ -f out/Release/libffmpeg*.so ]; then
  cp -a \
    out/Release/libffmpeg*.so \
    $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/
elif [ -f out/Release/lib/libffmpeg.so ]; then
  mkdir -p $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/lib/
  cp -a \
    out/Release/lib/libffmpeg.so \
    $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/lib/
fi
if [ -f out/Release/natives_blob.bin ]; then
  cp -a \
    out/Release/{natives_blob.bin,snapshot_blob.bin} \
    $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/
fi
if [ ${USE_NACL} -eq 1 ]; then
  # Native Client files:
  cp -a \
    out/Release/nacl_helper{,_bootstrap,_nonsfi} \
    out/Release/nacl_irt_*.nexe \
    $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/
fi
if [ $USE_CDM -eq 1 ]; then
  # Widevine and ClearKey CDM adapter:
  cp -a \
    out/Release/libwidevinecdmadapter.so \
    out/Release/libclearkeycdm.so \
    $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/
fi

# Manually strip binaries so that 'nacl_irt_*.nexe' is left intact
strip  --strip-unneeded \
  $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/{${PRGNAM},chrome-sandbox} \
  $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/chromedriver
if [ -f $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/libffmpeg*.so ]; then
  strip  --strip-unneeded \
    $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/libffmpeg*.so
elif [ -f $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/lib/libffmpeg*.so ]; then
  strip  --strip-unneeded \
    $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/lib/libffmpeg*.so
fi
if [ ${USE_NACL} -eq 1 ]; then
  strip  --strip-unneeded \
    $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/nacl_helper{,_bootstrap,_nonsfi}
fi
if [ ${USE_CDM} -eq 1 ]; then
  strip  --strip-unneeded \
    $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/libwidevinecdmadapter.so \
    $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/libclearkeycdm.so
fi

# Add locales:
cp -a out/Release/locales $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/
ln -s locales $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/remoting_locales

# Add resource files:
cp -a out/Release/resources $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/

# Install a man page:
install -D -m0644 out/Release/chrome.1 $PKG/usr/man/man1/${PRGNAM}.1

# Without this file, chromium refuses to start:
cp -a out/Release/icudtl.dat $PKG/usr/lib${LIBDIRSUFFIX}/${PRGNAM}/

# Install a wrapper script:
install -D -m0755 $SRCDIR/${PRGNAM}.sh $PKG/usr/bin/${PRGNAM}
sed \
    -e "s/@PRGNAM@/${PRGNAM}/g" \
    -e "s/@SRCEXT@/${SRCEXT}/g" \
    -e "s/@LIBDIRSUFFIX@/${LIBDIRSUFFIX}/g" \
    -e "s/@CRFLAGS@/${CRFLAGS}/g" \
    -e "s/@CRUSERFLAGS@/${CRUSERFLAGS}/g" \
    -i $PKG/usr/bin/${PRGNAM}

# Make the chromedriver available in the $PATH :
ln -s ../lib${LIBDIRSUFFIX}/${PRGNAM}/chromedriver $PKG/usr/bin/chromedriver${SRCEXT}

# xdg-utils looks for "chromium-browser" so symlink it to the wrapper:
ln -s ${PRGNAM} $PKG/usr/bin/chromium-browser${SRCEXT}

# Install desktop icons:
for size in 16 32; do
  install -D -m0644 \
    chrome/app/theme/default_100_percent/chromium/product_logo_$size.png \
    $PKG/usr/share/icons/hicolor/${size}x${size}/apps/${PRGNAM}.png
    ln -s ${PRGNAM}.png \
      $PKG/usr/share/icons/hicolor/${size}x${size}/apps/chromium-browser${SRCEXT}.png
done
for size in 22 24 48 64 128 256; do
  install -D -m0644 \
    chrome/app/theme/chromium/product_logo_$size.png \
    $PKG/usr/share/icons/hicolor/${size}x${size}/apps/${PRGNAM}.png
    ln -s ${PRGNAM}.png \
      $PKG/usr/share/icons/hicolor/${size}x${size}/apps/chromium-browser${SRCEXT}.png
done

# Add a desktop file:
install -D -m0644 \
  $SRCDIR/${PRGNAM}.desktop $PKG/usr/share/applications/${PRGNAM}.desktop

# Move the 'default' file into place.
# This allows users to override command-line options:
mkdir -p $PKG/etc/${PRGNAM}
cat $SRCDIR/${PRGNAM}.default | sed \
  -e "s/@PRGNAM@/${PRGNAM}/g" \
  -e "s/@SRCEXT@/${SRCEXT}/g" \
  -e "s/@CRFLAGS@/${CRFLAGS}/g" \
  -e "s/@CRUSERFLAGS@/${CRUSERFLAGS}/g" \
  -e "s/@LIBDIRSUFFIX@/${LIBDIRSUFFIX}/g" \
  > $PKG/etc/${PRGNAM}/00-default.conf.new

# Add this to the doinst.sh:
mkdir -p $PKG/install
cat <<EOINS >> $PKG/install/doinst.sh
# Handle the incoming configuration files:
config() {
  for infile in \$1; do
    NEW="\$infile"
    OLD="\`dirname \$NEW\`/\`basename \$NEW .new\`"
    # If there's no config file by that name, mv it over:
    if [ ! -r \$OLD ]; then
      mv \$NEW \$OLD
    elif [ "\`cat \$OLD | md5sum\`" = "\`cat \$NEW | md5sum\`" ]; then
      # toss the redundant copy
      rm \$NEW
    fi
    # Otherwise, we leave the .new copy for the admin to consider...
  done
}

config etc/${PRGNAM}/00-default.conf.new

# Update the desktop database:
if [ -x usr/bin/update-desktop-database ]; then
  chroot . /usr/bin/update-desktop-database usr/share/applications > /dev/null 2>&1
fi

# Update hicolor theme cache:
if [ -d usr/share/icons/hicolor ]; then
  if [ -x /usr/bin/gtk-update-icon-cache ]; then
    chroot . /usr/bin/gtk-update-icon-cache -f -t usr/share/icons/hicolor 1> /dev/null 2> /dev/null
  fi
fi

# Update the mime database:
if [ -x usr/bin/update-mime-database ]; then
  chroot . /usr/bin/update-mime-database usr/share/mime >/dev/null 2>&1
fi

EOINS

# Add documentation:
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a $DOCS $PKG/usr/doc/$PRGNAM-$VERSION || true
cat $SRCDIR/$(basename $0) > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
chown -R root:root $PKG/usr/doc/$PRGNAM-$VERSION
find $PKG/usr/doc -type f -exec chmod 644 {} \;

# Compress the man page(s):
if [ -d $PKG/usr/man ]; then
  find $PKG/usr/man -type f -name "*.?" -exec gzip -9f {} \;
  for i in $(find $PKG/usr/man -type l -name "*.?") ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
fi

# Add a package description:
mkdir -p $PKG/install
cat $SRCDIR/slack-desc${SRCEXT} > $PKG/install/slack-desc

# Build the package:
cd $PKG
makepkg --linkadd y --chown n $OUTPUT/${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.${PKGTYPE:-txz} 2>&1 | tee $OUTPUT/makepkg-${PRGNAM}.log
cd $OUTPUT
md5sum ${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.${PKGTYPE:-txz} > ${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.${PKGTYPE:-txz}.md5
cd -
cat $PKG/install/slack-desc | grep "^${PRGNAM}" > $OUTPUT/${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.txt

# Restore the original umask:
umask ${_UMASK_}