#!/bin/bash

# Copyright 2008, 2009, 2010, 2018  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.

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

PKGNAM=db42
VERSION=4.2.52
BUILD=${BUILD:-4}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i586 ;;
    arm*) export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( 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-db42
rm -rf $PKG
mkdir -p $TMP $PKG

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
  CONFIGURE_ARGS=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
  CONFIGURE_ARGS=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
  # Needed as a workaround for:
  # "architecture lacks fast mutexes: applications cannot be threaded"
  CONFIGURE_ARGS="--with-mutex=x86/gcc-assembly"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
  CONFIGURE_ARGS=""
fi

cd $TMP
rm -rf db-$VERSION
tar xvf $CWD/db-$VERSION.tar.bz2 || exit 1
cd db-$VERSION || exit 1
zcat $CWD/patch.4.2.52.1.gz | patch -p0 --verbose || exit 1
zcat $CWD/patch.4.2.52.2.gz | patch -p0 --verbose || exit 1
zcat $CWD/patch.4.2.52.3.gz | patch -p0 --verbose || exit 1
zcat $CWD/patch.4.2.52.4.gz | patch -p0 --verbose || 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 {} \+

rm -rf build-dir
mkdir build-dir
cd build-dir
CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
../dist/configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --enable-shared \
  --enable-rpc \
  --enable-compat185 \
  $CONFIGURE_ARGS \
  --build=$ARCH-slackware-linux || exit 1

make -j3 || exit 1
make install DESTDIR=$PKG || exit 1

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

( cd $PKG
  find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
)
# Remove WAY TOO LARGE (and misplaced) docs:
rm -rf $PKG/usr/docs
mkdir -p $PKG/usr/doc/db-$VERSION
cp -a \
  ../LICENSE ../README \
  $PKG/usr/doc/db-$VERSION
cat << EOF > $PKG/usr/doc/db-$VERSION/README-DOCS

  For a ton of additional documentation (too large to include
  here) on writing source code that uses libdb42, please see
  the source tarball db-$VERSION.tar.bz2, which can be found
  in the Slackware source tree in source/l/db42/, or on
  Sleepycat's web site:  http://www.sleepycat.com.

EOF

# Put libdb-4.2.so into /lib${LIBDIRSUFFIX} since it might be needed
# before /usr is mounted.
mkdir -p $PKG/lib${LIBDIRSUFFIX}
mv $PKG/usr/lib${LIBDIRSUFFIX}/libdb-4.2.so $PKG/lib${LIBDIRSUFFIX}/libdb-4.2.so
( cd $PKG/usr/lib${LIBDIRSUFFIX}
  ln -sf /lib${LIBDIRSUFFIX}/libdb-4.2.so .
)

( cd $PKG/usr/include
  chmod 644 *
  mkdir db42
  mv db.h db_185.h db_cxx.h db42
  # Not any more... db-4.2 is on the way out.
  #ln -sf db42/db.h .
  #ln -sf db42/db_185.h .
  #ln -sf db42/db_cxx.h .
)

chmod 755 $PKG/usr/bin/*

( cd $PKG/usr/bin
  mv berkeley_db_svc berkeley_db42_svc
  for file in db_* ; do
    mv $file db42_`echo $file | cut -f 2- -d _`
  done
)

# Not the default DB version:
rm -f $PKG/usr/include/{db.h,db_185.h,db_cxx.h}
rm -f $PKG/usr/lib${LIBDIRSUFFIX}/libdb-4.so
rm -f $PKG/usr/lib${LIBDIRSUFFIX}/libdb.{a,so}
# We will not be linking statically against this, either.
# If you need to do that, drag up an old package from the Slackware 10.2 era...
rm -f $PKG/usr/lib${LIBDIRSUFFIX}/*.a

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

cd $PKG
makepkg -l y -c n $TMP/db42-$VERSION-$ARCH-$BUILD.txz