#!/bin/sh

# Copyright 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016  Patrick J. Volkerding, Sebeka, Minnesota, USA
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 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 AUTHOR 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.

# Thanks to the folks at the Mozilla Foundation for permission to
# distribute this, and for all the great work!  :-)

VERSION=$(basename $(ls firefox-*.tar.?z* | cut -d - -f 2 | rev | cut -f 3- -d . | rev) .source)
RELEASEVER=$(echo $VERSION | cut -f 1 -d r | cut -f 1 -d b | cut -f 1 -d e)
BUILD=${BUILD:-2_slack14.1}

# Specify this variable for a localized build.
# For example, to build a version of Firefox with Italian support, run
# the build script like this:
#
# MOZLOCALIZE=it ./mozilla-firefox.SlackBuild
#
MOZLOCALIZE=${MOZLOCALIZE:-}

# Without LANG=C, building the Python environment may fail with:
# "UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 36: ordinal not in range(128)"
LANG=C

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i486 ;;
    arm*) export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( uname -m ) ;;
  esac
fi

# Use PGO?  Doubles the time and drive space requirements for the build,
# but should provide a performance increase.  How much depends on which
# benchmarks you believe, but I've typically seen around 2.5%.  I've also
# seen some which say it can be negligably (a fraction of a percent) slower
# with this enganged.  The anecdotal reports usually say there's a noticable
# improvement in overall responsiveness.  Seems like a good bet if you have
# the time and your system is able to handle it.  Set the variable to
# anything else prior to the build to compile Firefox in less time (but
# without the possible benefits of Profile-Guided Optimization).
#
# NOTE:  The 23.0 release fails to compile with a GLib assert error if PGO
# is enabled, so it is being disabled by default.  I can't say I ever noticed
# a lot of difference with this anyway (other than a much, much longer compile
# time.  But pass PGO=yes to the SlackBuild if you want to try it.
#if [ "$ARCH" = "x86_64" ]; then
#  PGO=${PGO:-yes}
#else
#  # 32-bit systems have problems compiling with PGO, as the per-process
#  # memory requirements are too large.  Possibly compiling with a 64-bit
#  # kernel could be a workaround for this, but for now we will default to
#  # using PGO only for x86_64.
#  PGO=${PGO:-no}
#fi
#
# PGO is disabled by default:
PGO=${PGO:-no}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS=""
  LIBDIRSUFFIX=""
  OPTIMIZE=" --enable-optimize=-O2 "
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
  OPTIMIZE=" --enable-optimize=-O2 "
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
  OPTIMIZE=" --enable-optimize=-O2 "
elif [ "$ARCH" = "arm" ]; then
  SLKCFLAGS="-O2 -march=armv4 -mtune=xscale"
  LIBDIRSUFFIX=""
  OPTIMIZE=" --enable-optimize=-O2 "
elif [ "$ARCH" = "armel" ]; then
  SLKCFLAGS="-O2 -march=armv4t"
  LIBDIRSUFFIX=""
  OPTIMIZE=" --enable-optimize=-O2 "
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
  OPTIMIZE=" --enable-optimize=-O2 "
fi

# Link using gold.  This avoids running out of memory on 32-bit systems, and
# avoids a recurring build failure with GNU ld on other systems.
PATH="$(pwd)/gold:$PATH"
export CC="gcc -B$(pwd)/gold"
export CXX="g++ -B$(pwd)/gold"

# Firefox 52.x seems unstable with --enable-optimize on Slackware 14.1,
# so we will disable it:
unset OPTIMIZE

CWD=$(pwd)
TMP=${TMP:-/tmp}
PKG=$TMP/package-mozilla-firefox

# If not specified, figure out if this is a beta or a release
MOZVERS=${MOZVERS:-release}
if echo $VERSION | grep -q b ; then MOZVERS=beta ; fi

NUMJOBS=${NUMJOBS:-" -j7 "}

rm -rf $PKG
mkdir -p $TMP $PKG/usr/lib${LIBDIRSUFFIX}

# We need to use the incredibly ancient autoconf-2.13 for this  :/
( cd $CWD/autoconf ; ./autoconf.build )
PATH=/tmp/autoconf-tmp/usr/bin:$PATH

cd $TMP
rm -rf firefox-$VERSION
# Unpack this in a subdirectory to prevent changing permissions on /tmp:
rm -rf firefox-unpack
mkdir firefox-unpack
cd firefox-unpack
tar xvf $CWD/firefox-$VERSION.source.tar.?z* || exit 1
mv * ..
cd ..
rm -rf firefox-unpack
cd firefox-$VERSION || exit 1

# Fetch localization, if requested
# https://bugzilla.mozilla.org/show_bug.cgi?id=1256955
if [ ! -z $MOZLOCALIZE ]; then
  LOC_URL="http://ftp.mozilla.org/pub/firefox/candidates/$VERSION-candidates/build1/l10n_changesets.txt"
  LOC_COMMIT=$(wget -q -O - $LOC_URL | grep ^$MOZLOCALIZE | cut -d\  -f2)
  hg clone https://hg.mozilla.org/l10n-central/$MOZLOCALIZE -r $LOC_COMMIT
fi

# Patch mimeTypes.rdf
# Uncomment this if you want to use the patch; otherwise, we overwrite the
# mimeTypes.rdf inside the package directory later
# zcat $CWD/mozilla-firefox-mimeTypes-fix.diff.gz | patch -p1 || exit 1

chown -R root:root .
find . \
  \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
  -exec chmod 755 {} \; -o \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \;

# Our building options, in a configure-like display ;)
OPTIONS="\
  --enable-official-branding \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --with-default-mozilla-five-home=/usr/lib${LIBDIRSUFFIX}/firefox-$RELEASEVER \
  --with-system-zlib \
  --enable-alsa \
  --disable-pulseaudio \
  --enable-application=browser \
  --enable-default-toolkit=cairo-gtk2 \
  --enable-startup-notification \
  $OPTIMIZE \
  --enable-strip \
  --enable-cpp-rtti \
  --disable-accessibility \
  --disable-crashreporter \
  --disable-debug"
# Complains about missing APNG support in Slackware's libpng:
# --with-system-png \
# This option breaks mozilla-12.0:
# --enable-system-cairo \
# NOTE:  It probably reduces bugs to use the bundled library versions,
# so in general we will not --enable-system-libraries.
# But since system zlib has been used for a long time and isn't a moving
# target, we'll leave that one as-is.
if [ ! -z $MOZLOCALIZE ]; then
  OPTIONS=$OPTIONS" \
  --enable-ui-locale=$MOZLOCALIZE
  --with-l10n-base=.."
  # There are no dictionaries in localized builds
  sed -i \
    -e "/@BINPATH@\/dictionaries\/\*/d" \
    -e "/@RESPATH@\/dictionaries\/\*/d" \
    browser/installer/package-manifest.in || exit 1
fi

export MOZILLA_OFFICIAL="1"
export BUILD_OFFICIAL="1"
export MOZ_PHOENIX="1"
export MOZ_PACKAGE_JSSHELL="1"
export CFLAGS="$SLKCFLAGS"
export CXXFLAGS="$SLKCFLAGS"
export MOZ_MAKE_FLAGS="$NUMJOBS"

# Clear some variables that could break the build
unset DBUS_SESSION_BUS_ADDRESS ORBIT_SOCKETDIR SESSION_MANAGER \
  XDG_SESSION_COOKIE XAUTHORITY MAKEFLAGS

# Assemble our .mozconfig, we use this method for building, seems
# needed for PGO.
echo ". \$topsrcdir/browser/config/mozconfig" > .mozconfig

# Mozilla devs enforce using an objdir for building
# https://developer.mozilla.org/en/Configuring_Build_Options#Building_with_an_objdir
mkdir obj
echo "mk_add_options MOZ_OBJDIR=$(pwd)/obj" >> .mozconfig

if [ "$MOZLOCALIZE" ]; then
  echo "mk_add_options MOZ_CO_LOCALES=\"$MOZLOCALIZE\"" >> .mozconfig
fi

# Write in it the options above
for option in $OPTIONS; do echo "ac_add_options $option" >> .mozconfig; done

# https://developer.mozilla.org/en-US/docs/Building_with_Profile-Guided_Optimization
# Thanks to ArchLinux and Gentoo for the additional hints.
if [ "$PGO" = "yes" ]; then
  # Do a PGO build, double time and disk space but worth it.
  export MOZ_PGO=1
  echo "mk_add_options PROFILE_GEN_SCRIPT='EXTRA_TEST_ARGS=10 \$(MAKE) -C \$(MOZ_OBJDIR) pgo-profile-run'" >> .mozconfig
  export DISPLAY=:99
  # Launch Xvfb to let the profile scripts run in a X session.
  # Ugly note: if the build breaks you may want to do a "killall Xvfb".
  Xvfb -nolisten tcp -extension GLX -screen 0 1280x1024x24 $DISPLAY &
  dbus-launch --exit-with-session make -f client.mk build || exit 1
  kill $! || true
else
  # Do a normal build
  echo "ac_add_options --disable-tests" >> .mozconfig
  make -f client.mk build || exit 1
fi

make -f client.mk install DESTDIR=$PKG || exit 1

# We don't need these (just symlinks anyway):
rm -rf $PKG/usr/lib${LIBDIRSUFFIX}/firefox-devel-$RELEASEVER

# Nor these:
rm -rf $PKG/usr/include

( cd $PKG/usr/lib${LIBDIRSUFFIX}/firefox-$RELEASEVER
  #mv defaults/profile/mimeTypes.rdf defaults/profile/mimeTypes.rdf.orig || exit 1
  if [ -d defaults/profile ]; then
    zcat $CWD/mimeTypes.rdf > defaults/profile/mimeTypes.rdf || exit 1
  fi
  # OK, this patch is useless on 7.x.  We'll float without it and see what happens.
  # Perhaps it won't make a difference or should be worked around elsewhere.
  #zcat $CWD/firefox.moz_plugin_path.diff.gz \
  #  | sed -e "s#usr/lib#usr/lib${LIBDIRSUFFIX}#g" \
  #  | patch -p1 --verbose --backup --suffix=.orig || exit 1
  # Clean up if the above patch was successful:
  #rm -f firefox.orig
) || exit

mkdir -p $PKG/usr/lib${LIBDIRSUFFIX}/mozilla/plugins
mkdir -p $PKG/usr/share/applications
cat $CWD/mozilla-firefox.desktop > $PKG/usr/share/applications/mozilla-firefox.desktop

# These files/directories are usually created if Firefox is run as root,
# which on many systems might (and possibly should) be never.  Therefore, if we
# don't see them we'll put stubs in place to prevent startup errors.
( cd $PKG/usr/lib${LIBDIRSUFFIX}/firefox-$RELEASEVER
  if [ -d extensions/talkback\@mozilla.org ]; then
    if [ ! -r extensions/talkback\@mozilla.org/chrome.manifest ]; then
      echo > extensions/talkback\@mozilla.org/chrome.manifest
    fi
  fi
  if [ ! -d updates ]; then
    mkdir -p updates/0
  fi
)

# Need some default icons in the right place:
for i in 16 22 24 32 48 256; do
  install -m 0644 -D browser/branding/official/default${i}.png \
    $PKG/usr/share/icons/hicolor/${i}x${i}/apps/firefox.png
done
mkdir -p $PKG/usr/share/pixmaps
( cd $PKG/usr/share/pixmaps ; ln -sf /usr/share/icons/hicolor/256x256/apps/firefox.png . )
mkdir -p $PKG/usr/lib$LIBDIRSUFFIX/firefox-$RELEASEVER/chrome/icons/default
install -m 644 browser/branding/official/default16.png \
  $PKG/usr/lib$LIBDIRSUFFIX/firefox-$RELEASEVER/icons/
install -m 644 browser/branding/official/default16.png \
  $PKG/usr/lib$LIBDIRSUFFIX/firefox-$RELEASEVER/chrome/icons/default/

# Copy over the LICENSE
install -p -c -m 644 LICENSE $PKG/usr/lib${LIBDIRSUFFIX}/firefox-$RELEASEVER/

mkdir $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
if [ -z $MOZLOCALIZE ]; then
  /sbin/makepkg -l y -c n $TMP/mozilla-firefox-$VERSION-$ARCH-$BUILD.txz
else
  /sbin/makepkg -l y -c n $TMP/mozilla-firefox-$VERSION-$ARCH-${BUILD}_$MOZLOCALIZE.txz
fi