#!/bin/bash
# Copyright 2001 BSDi, Inc. Concord, CA, USA
# Copyright 2004 Slackware Linux, Inc.  Concord, CA, USA
# Copyright 2007, 2008, 2009, 2010, 2013, 2016, 2018, 2019  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=ksh93
SRCNAM=att-ast
VERSION=${VERSION:-$(echo $SRCNAM-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-1}

# 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

NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "armv7hl" ]; then
  SLKCFLAGS="-O3 -march=armv7-a -mfpu=vfpv3-d16"
  LIBDIRSUFFIX=""
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

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

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

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

# A test script defaults to GCC, which doesn't make sense as we use clang
# to compile ksh93. This probably wouldn't be as much of a problem except
# that it fails with GCC9.
zcat $CWD/ksh93.use.clang.for.tests.diff.gz | patch -p1 --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 {} \;

# Configure, build, and install:
export CC=clang
export CFLAGS="$SLKCFLAGS"
mkdir build
cd build
meson setup \
  --prefix=/usr \
  --libdir=lib${LIBDIRSUFFIX} \
  --libexecdir=/usr/libexec \
  --bindir=/usr/bin \
  --sbindir=/usr/sbin \
  --includedir=/usr/include \
  --datadir=/usr/share \
  --mandir=/usr/man \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --buildtype=release \
  .. || exit 1
  ninja $NUMJOBS || exit 1
  DESTDIR=$PKG ninja install || exit 1
cd ..

# Stuff we don't ship:
rm -f $PKG/usr/bin/pty
rm -f $PKG/usr/bin/shcomp

# Move the shell into /bin:
mkdir -p $PKG/bin
mv --verbose $PKG/usr/bin/ksh $PKG/bin/ksh.new || exit 1
rmdir $PKG/usr/bin || exit 1
strip --strip-unneeded $PKG/bin/ksh.new
( cd $PKG/bin ; ln -sf ksh rksh )
if [ -r $PKG/usr/man/man1/ksh.1 ]; then
  gzip -9 $PKG/usr/man/man1/ksh.1
fi
( cd $PKG/usr/man/man1 ; ln -sf ksh.1.gz rksh.1.gz )

mkdir -p $PKG/usr/doc/ksh93-$VERSION
( cd src/cmd/ksh93
  cp -a COMPATIBILITY DESIGN OBSOLETE PROMO.mm README RELEASE* TYPES \
     $PKG/usr/doc/ksh93-$VERSION
)
mkdir -p $PKG/usr/doc/ksh93-$VERSION/LICENSE
cp -a lib/package/LICENSES/* $PKG/usr/doc/ksh93-$VERSION/LICENSE
find . -name "*.def" -exec cp -a "{}" $PKG/usr/doc/ksh93-$VERSION/LICENSE \;
find . -name "*.lic" -exec cp -a "{}" $PKG/usr/doc/ksh93-$VERSION/LICENSE \;

mkdir -p $PKG/install
cat <<EOF >> $PKG/install/doinst.sh
# Backup the old copy if we find one, move the new one in place
if [ -f bin/ksh ]; then
   mv bin/ksh bin/ksh.old
fi
mv bin/ksh.new bin/ksh
if [ -f bin/ksh.old ]; then
  rm -f bin/ksh.old
fi

# Add entries to /etc/shells if we need them
if [ ! -r etc/shells ] ; then
   touch etc/shells
   chmod 644 etc/shells
fi
 
if ! grep -q "/bin/ksh" etc/shells ; then
   echo "/bin/ksh" >> etc/shells
fi
EOF

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

cd $PKG
/sbin/makepkg -l y -c n /tmp/ksh93-$VERSION-$ARCH-$BUILD.txz