#!/bin/bash

# Copyright 2005-2018  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=iproute2
VERSION=${VERSION:-$(echo $PKGNAM-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-1}

#NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 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-$(echo $VERSION | tr - _)-$ARCH-$BUILD.txz"
  exit 0
fi

if [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=pentium4 -mtune=generic"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -march=x86-64 -mtune=generic -fPIC"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
else
  SLKCFLAGS=${SLKCFLAGS:-"-O2"}
  LIBDIRSUFFIX=${LIBDIRSUFFIX:-""}
fi

TMP=${TMP:-/tmp}
PKG=$TMP/package-iproute2

rm -rf $PKG
mkdir -p $TMP $PKG
cd $TMP
rm -rf iproute2-$VERSION
tar xvf $CWD/iproute2-$VERSION.tar.?z || exit 1
cd iproute2-$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 {} \+

./configure  # This is okay, really :-)

make \
  CCOPTS="$SLKCFLAGS" \
  LIBDIR=/usr/lib${LIBDIRSUFFIX} \
  CONF_ETC_DIR?=/etc/iproute2 \
  CONF_USR_DIR?=/usr/lib/iproute2 \
  DOCDIR=/usr/doc/iproute2-$VERSION \
  MANDIR=/usr/man \
  DBM_INCLUDE=/usr/include/db48 \
  $NUMJOBS || exit 1

make install \
  LIBDIR=/usr/lib${LIBDIRSUFFIX} \
  CONF_ETC_DIR?=/etc/iproute2 \
  CONF_USR_DIR?=/usr/lib/iproute2 \
  DOCDIR=/usr/doc/iproute2-$VERSION \
  MANDIR=/usr/man \
  DBM_INCLUDE=/usr/include/db48 \
  DESTDIR=$PKG || exit 1

mkdir -p $PKG/usr
make install LIBDIR=/usr/lib${LIBDIRSUFFIX} DESTDIR=$PKG/usr/ || exit 1

# Add a configuration override directory:
mkdir -p $PKG/etc/iproute2

# This stuff has always been installed under /sbin rather than
# /usr/sbin, as the latter could possibly be network-mounted, and
# these utilities may be needed to set up that network, so move
# them appropriately, but leave symlinks in /usr/sbin so that
# any scripts using absolute paths will work either way:
mkdir $PKG/sbin
mv $PKG/usr/sbin/* $PKG/sbin
( cd $PKG/usr/sbin
  for file in ../../sbin/* ; do
    ln -sf $file .
  done
)

# Don't clobber existing config files
for file in $PKG/usr/lib/iproute2/* ; do
  mv $file ${file}.new
done

# Remove junk:
[ -d $PKG/usr/usr ] && rm -r $PKG/usr/usr
[ -d $PKG/usr/var ] && rm -r $PKG/usr/var
[ -d $PKG/usr/etc ] && rm -r $PKG/usr/etc

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

# 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

mkdir -p $PKG/usr/doc/iproute2-$VERSION
cp -a COPYING RE* \
  $PKG/usr/doc/iproute2-$VERSION

# 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

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 $TMP/iproute2-$(echo $VERSION | tr - _)-$ARCH-$BUILD.txz