#!/bin/sh

# Copyright 2008, 2009, 2010  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.

BUILD=${BUILD:-1}

PKGNAM=git
VERSION=${VERSION:-$(echo $PKGNAM-*.tar.?z* | cut -d - -f 2 | rev | cut -f 3- -d . | rev)}
NUMJOBS=${NUMJOBS:-" -j7 "}

# 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

eval $(perl '-V:installvendorlib')
PERLDIR=$installvendorlib/$ARCH-linux-thread-multi/auto

if ls /var/log/packages/git-* 1> /dev/null 2> /dev/null ; then
  echo "Git is installed.  The package should be removed before"
  echo "building, or the new package might be missing some"
  echo "perl modules."
  echo
  echo "You'll be given a short time to consider this."
  sleep 3600
fi

if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
else
  SLKCFLAGS="-O2"
fi

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

rm -rf $PKG
mkdir -p $TMP $PKG

cd $TMP
rm -rf git-$VERSION
tar xvf $CWD/git-$VERSION.tar.?z* || exit 1
cd git-$VERSION

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 {} \;

mkdir -p $PKG/usr/doc/git-$VERSION
cp -a \
  COPYING* INSTALL README \
  Documentation \
  contrib \
  $PKG/usr/doc/git-$VERSION
( cd $PKG/usr/doc/git-$VERSION/Documentation ; rm *.1 *.3 *.7 )
( cd $PKG/usr/doc/git-$VERSION && find . -name ".git*" -exec rm -r "{}" \; )

make $NUMJOBS \
  prefix=/usr \
  mandir=/usr/man \
  CFLAGS="$SLKCFLAGS" \
  INSTALLDIRS=vendor \
  all doc || exit 1

make \
  prefix=/usr \
  mandir=/usr/man \
  "CFLAGS=$SLKCFLAGS" \
  INSTALLDIRS=vendor \
  install \
  install-doc \
  DESTDIR=$PKG || exit 1

mv $PKG/usr/share/man/man3 $PKG/usr/man
rmdir $PKG/usr/share/man

# Compress and if needed symlink the man pages:
if [ -d $PKG/usr/man ]; then
  ( cd $PKG/usr/man
    for manpagedir in $(find . -type d -name "man*") ; do
      ( cd $manpagedir
        for eachpage in $( find . -type l -maxdepth 1) ; do
          ln -s $( readlink $eachpage ).gz $eachpage.gz
          rm $eachpage
        done
        gzip -9 *.?
      )
    done
  )
fi

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

# Since Stuart Winter hates hard links.  ;-)
#
# Switch a hard link with a soft link:
( cd $PKG/usr/bin
  find . -links +1 -not -name git | while read gitfile ; do
    if [ git -ef $gitfile ]; then
      rm -vf $gitfile
      ln -vfs git $gitfile
    fi
  done
)

# This removes our DESTDIR from the packlist filenames, to keep perl's 
# internal inventories consistent and correct.
find $PKG -name .packlist | while read plist ; do
  sed -e "s%/share/man%/man%g" \
      -e "s%$PKG%%g" \
      -e "s%\.1$%\.1\.gz%g" \
      -e "s%\.2$%\.2\.gz%g" \
      -e "s%\.3$%\.3\.gz%g" \
      -e "s%\.3pm$%\.3pm\.gz%g" \
      -e "s%\.4$%\.4\.gz%g" \
      -e "s%\.5$%\.5\.gz%g" \
      -e "s%\.6$%\.6\.gz%g" \
      -e "s%\.7$%\.7\.gz%g" \
      -e "s%\.8$%\.8\.gz%g" \
      ${plist} > ${plist}.new
      mv -f ${plist}.new ${plist}
done

# This is junk:
eval $(perl '-V:privlib')
( cd $PKG$(dirname $privlib) && rm -rf 5.* )

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

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