#!/bin/sh

# Copyright 2008, 2009, 2010, 2011, 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.

BUILD=${BUILD:-1_slack14.0}

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 "The git package needs to be removed before building to ensure that"
  echo "the perl modules are included in the new package."
  echo
  echo "Removing the git package in 15 seconds, and then continuing with the build."
  sleep 15
  removepkg git
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 \
  ASCIIDOC8=YesPlease \
  all doc || exit 1

make \
  prefix=/usr \
  mandir=/usr/man \
  "CFLAGS=$SLKCFLAGS" \
  INSTALLDIRS=vendor \
  ASCIIDOC8=YesPlease \
  install \
  install-doc \
  DESTDIR=$PKG || exit 1

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

# Don't stomp on perl's file:
rm -f $PKG/usr/lib*/perl5/perllocal.pod

# 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