#!/bin/bash

# Copyright 2008, 2009, 2010, 2011, 2012, 2014, 2015, 2017, 2018, 2020  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=ntp
VERSION=${VERSION:-$(echo $PKGNAM-*.tar.?z* | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-9}

# 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 [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
else
  SLKCFLAGS="-O2"
fi

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

rm -rf $PKG
mkdir -p $TMP $PKG
cd $TMP
rm -rf ntp-${VERSION}*
tar xvf $CWD/ntp-${VERSION}*.tar.?z* || exit 1
cd ntp-${VERSION}* || exit 1

zcat $CWD/ntp.nano.diff.gz | patch -p1 --verbose || exit 1

# glibc-2.34+ fix from from https://www.linuxfromscratch.org/blfs/view/svn/basicnet/ntp.html
zcat $CWD/ntp.glibc-2.34.diff.gz | patch -p1 --verbose || exit 1

chown -R root:root .
find . \
  \( -perm 2777 -o -perm 2755 -o -perm 2775 \) \
  -exec chmod u+rwx,g-sw,g+rx,o-w,o+rx {} \+ -o \
  \( -perm 777 -o -perm 775 -o -perm 774 -o -perm 711 -o -perm 555 -o -perm 511 \) \
  -exec chmod u+rwx,g-sw,g+rx,o-w,o+rx {} \+ -o \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \+

CFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --localstatedir=/var \
  --sysconfdir=/etc \
  --bindir=/usr/sbin \
  --sbindir=/usr/sbin \
  --mandir=/usr/man \
  --docdir=/usr/doc/ntp-$VERSION \
  --htmldir=/usr/doc/ntp-$VERSION \
  --enable-ipv6 \
  --with-crypto \
  --enable-ntp-signd \
  --program-prefix= \
  --program-suffix= \
  --build=$ARCH-slackware-linux || exit 1

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

# KDE Plasma 5 seems to want ntpdate in /usr/bin unless you have systemd:
mkdir -p $PKG/usr/bin
( cd $PKG/usr/bin
  ln -sf ../sbin/ntpdate .
)

# This should be empty.  Try to remove it, and error out if it's not actually empty:
rmdir $PKG/usr/libexec || exit 1

# Install default conf and keys files:
mkdir -p $PKG/etc
cat $CWD/ntp.conf > $PKG/etc/ntp.conf.new
cat $CWD/ntp.keys > $PKG/etc/ntp.keys.new
chown root:ntp $PKG/etc/ntp.keys.new
chmod 640 $PKG/etc/ntp.keys.new

# Location for the drift and stats files:
mkdir -p $PKG/var/lib/ntp
chown ntp:ntp $PKG/var/lib/ntp
chmod 0775 $PKG/var/lib/ntp

# This is deprecated and no longer used by anything:
#touch $PKG/etc/ntp/step-tickers

mkdir -p $PKG/etc/logrotate.d
cat $CWD/ntp.logrotate > $PKG/etc/logrotate.d/ntp.new

mkdir -p $PKG/etc/rc.d
cat $CWD/rc.ntpd > $PKG/etc/rc.d/rc.ntpd.new

mv $PKG/usr/doc/ntp-$VERSION/*.html $PKG/usr/doc/ntp-$VERSION/html || exit 1
cp -a \
  COPYRIGHT NEWS README* TODO WHERE-TO-START \
  *.y2kfixes clockstuff conf scripts \
  $PKG/usr/doc/ntp-$VERSION
mkdir $PKG/usr/doc/ntp-$VERSION/util
cp -a util/README $PKG/usr/doc/ntp-$VERSION/util
mkdir $PKG/usr/doc/ntp-$VERSION/ntpdate
cp -a ntpdate/README $PKG/usr/doc/ntp-$VERSION/ntpdate
( cd $PKG/usr/doc/ntp-$VERSION
  find . -name ".deps*" -exec rm -rf "{}" \+ 2> /dev/null
)

# If there's a ChangeLog, installing at least part of the recent history
# is useful, but don't let it get totally out of control:
if [ -r ChangeLog ]; then
  DOCSDIR=$(echo $PKG/usr/doc/${PKGNAM}-$VERSION)
  cat ChangeLog | head -n 1000 > $DOCSDIR/ChangeLog
  touch -r ChangeLog $DOCSDIR/ChangeLog
fi

# Strip binaries:
( 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
)

# Compress and link manpages, if any:
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

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
zcat $CWD/doinst.sh.gz > $PKG/install/doinst.sh

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