#!/bin/sh

# Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2013  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.

PKGNAM=mesa
VERSION=10.0.3
DEMOVERS=8.1.0
BUILD=${BUILD:-1}

NUMJOBS=${NUMJOBS:--j3}

# Be sure this list is up-to-date:
DRI_DRIVERS="i915,i965,r200,swrast"

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i486 ;;
    arm*) export ARCH=arm ;;
       *) export ARCH=$( uname -m ) ;;
  esac
fi

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

if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC -march=native"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

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

tar xvf $CWD/MesaLib-${VERSION}.tar.?z* || exit 1
cd Mesa-$VERSION

# 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/8.0
#   git format-patch 3d657b14b4cab98a2945904823e78cd8950944f4.. # 8.0.3 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

if [ ! -r configure ]; then
  autoreconf || exit 1
fi

# Running autogen to avoid problems if our autotools don't match upstream's:
./autogen.sh

CFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --sysconfdir=/etc \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --mandir=/usr/man \
  --docdir=/usr/doc/mesa-$VERSION \
  --with-dri-driverdir=/usr/lib${LIBDIRSUFFIX}/xorg/modules/dri \
  --with-dri-drivers="$DRI_DRIVERS" \
  --with-gallium-drivers=nouveau,r300,r600,svga \
  --enable-gallium-llvm \
  --enable-shared-glapi \
  --enable-xa \
  --enable-osmesa \
  --build=$ARCH-slackware-linux

# r300 requires llvm
# Other gallium drivers:
# galahad,i915,identity,llvmpipe,noop,nv50,nvc0,nvfx,rbug,softpipe,svga,trace

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

# Now install the demos
( 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
  # Build and install gears and glinfo, as well as a few other demos
  make -C src/demos gears glinfo
  make -C src/xdemos \
    glthreads glxcontexts glxdemo glxgears glxgears_fbconfig \
    glxheads glxinfo glxpbdemo glxpixmap
  mkdir -p $PKG/usr/bin
  cp -a src/demos/{gears,glinfo} $PKG/usr/bin
  for i in glthreads glxcontexts glxdemo glxgears glxgears_fbconfig \
      glxheads glxinfo glxpbdemo glxpixmap ; do
        cp -a src/xdemos/$i $PKG/usr/bin ;
  done
)
  
# 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 $PKG/usr/doc/Mesa-$VERSION/html
cp -a \
  docs/COPYING* docs/relnotes-${VERSION}*.html docs/README* docs/GL* \
  $PKG/usr/doc/Mesa-$VERSION
cp -a docs/*.html $PKG/usr/doc/Mesa-$VERSION/html
rm -f $PKG/usr/doc/Mesa-$VERSION/html/relnotes*.html

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

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