#!/bin/sh

# Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2013, 2014, 2015, 2016, 2017, 2018  Patrick J. Volkerding, Sebeka, MN, 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.


cd $(dirname $0) ; CWD=$(pwd)

PKGNAM=mesa
VERSION=${VERSION:-18.0.1}
DEMOVERS=${DEMOVERS:-8.4.0}
BUILD=${BUILD:-1}

NUMJOBS=${NUMJOBS:--j7}

# Be sure this list is up-to-date:
DRI_DRIVERS="i915,i965,nouveau,r200,radeon,swrast"
GALLIUM_DRIVERS="nouveau,r300,r600,svga,radeonsi,swrast,virgl"
EGL_PLATFORMS="drm,x11,wayland"

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i586 ;;
    arm*) export ARCH=arm ;;
       *) export ARCH=$( uname -m ) ;;
  esac
fi

# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PKGNAM-$VERSION-$ARCH-$BUILD.txz"
  exit 0
fi

TMP=${TMP:-/tmp}
PKG=$TMP/package-mesa

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
  # I've heard some reports as of late 2016 that Vulkan has some issues on
  # 32-bit, but we'll try it anyway and see if anything is reported:
  VULKAN=" --with-vulkan-drivers=intel,radeon "
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
  VULKAN=" --with-vulkan-drivers=intel,radeon "
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

rm -rf $PKG
mkdir -p $TMP $PKG
cd $TMP
rm -rf ${PKGNAM}-${VERSION}

tar xvf $CWD/${PKGNAM}-${VERSION}.tar.xz || exit 1
cd ${PKGNAM}-$VERSION || exit 1

# Let's kill the warning about operating on a dangling symlink:
rm -f src/gallium/state_trackers/d3d1x/w32api

# Make sure ownerships and permissions are sane:
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 {} \;

# Apply patches from git (and maybe elsewhere):
# Patches obtained by:
#   git checkout origin/17.2
#   git format-patch 93c2beafc0a7fa2f210b006d22aba61caa71f773 # 17.2.6 release
if /bin/ls $CWD/patches/*.patch 1> /dev/null 2> /dev/null ; then
  for patch in $CWD/patches/*.patch ; do
    patch -p1 < $patch || exit 1 ;
  done
fi

# This doesn't fully do the trick.  See below.  ;-)
#./autogen.sh

# Fix detection of libLLVM when built with CMake
sed -i 's/LLVM_SO_NAME=.*/LLVM_SO_NAME=LLVM/' configure.ac

# Seems to need this to avoid tripping over a different libtool version:
autoreconf -fi

CFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --sysconfdir=/etc \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --mandir=/usr/man \
  --docdir=/usr/doc/${PKGNAM}-$VERSION \
  --with-dri-driverdir=/usr/lib${LIBDIRSUFFIX}/xorg/modules/dri \
  --with-dri-drivers="$DRI_DRIVERS" \
  --with-gallium-drivers="$GALLIUM_DRIVERS" \
  --with-egl-platforms="$EGL_PLATFORMS" \
  $VULKAN \
  --enable-llvm \
  --enable-llvm-shared-libs \
  --enable-egl \
  --enable-texture-float \
  --enable-shared-glapi \
  --enable-xa \
  --enable-nine \
  --enable-osmesa \
  --enable-dri \
  --enable-dri3 \
  --enable-gbm \
  --enable-glx \
  --enable-glx-tls \
  --enable-gles1 \
  --enable-gles2 \
  --enable-vdpau \
  --enable-opencl \
  --enable-opencl-icd \
  --build=$ARCH-slackware-linux || exit 1

# This is autodetected anyway:
#  --enable-va \

make $NUMJOBS || make || exit 1
make install DESTDIR=$PKG || exit 1

# Don't ship .la files:
rm -f $PKG/{,usr/}lib${LIBDIRSUFFIX}/*.la

# Install /etc/drirc as a .new file:
mv $PKG/etc/drirc $PKG/etc/drirc.new

# Now build/install a small subset of the demos:
export CWD SLKCFLAGS NUMJOBS PKG
( cd $TMP
  rm -rf mesa-demos-$DEMOVERS
  tar xvf $CWD/mesa-demos-$DEMOVERS.tar.?z* || exit 1
  cd mesa-demos-$DEMOVERS
  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 {} \;
  CFLAGS="$SLKCFLAGS" \
  ./configure \
    --prefix=/usr \
    --build=$ARCH-slackware-linux || exit 1
  make $NUMJOBS || exit 1
  # Install all the demos (including the pointless ones) at first, in a
  # temporary location:
  make install DESTDIR=$PKG/cruft || exit 1
  # Install gears and glinfo, as well as a few other demos:
  mkdir -p $PKG/usr/bin
  for demo in gears glinfo glthreads glxcontexts glxdemo glxgears \
    glxgears_fbconfig glxheads glxinfo glxpbdemo glxpixmap ; do
    mv --verbose $PKG/cruft/usr/bin/$demo $PKG/usr/bin
  done
  # Remove cruft:
  rm -rf $PKG/cruft
) || exit 1

# Strip binaries:
find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null

find $PKG/usr/man -type f -exec gzip -9 {} \;
for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done

# Compress info files, if any:
if [ -d $PKG/usr/info ]; then
  rm -f $PKG/usr/info/dir
  gzip -9 $PKG/usr/info/*
fi

mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION/html
cp -a \
  docs/COPYING* docs/relnotes/relnotes-${VERSION}*.html docs/README* docs/GL* \
  $PKG/usr/doc/$PKGNAM-$VERSION
cp -a docs/*.html $PKG/usr/doc/$PKGNAM-$VERSION/html
rm -f $PKG/usr/doc/$PKGNAM-$VERSION/html/relnotes*.html

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/doinst.sh > $PKG/install/doinst.sh

cd $PKG
/sbin/makepkg -l y -c n $TMP/${PKGNAM}-$VERSION-$ARCH-$BUILD.txz