#!/bin/bash

# Copyright 2009, 2010, 2011, 2018, 2019, 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.

# Originally written by Menno Duursma

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

PKGNAM=libcap
VERSION=${VERSION:-$(echo $PKGNAM-*.tar.xz | cut -d - -f 2 | rev | cut -f 3- -d . | rev)}
BUILD=${BUILD:-1}

# Building Go support is currently disabled until something actually needs it:
GOSUPPORT=${GOSUPPORT:-no}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i686 ;;
    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

# Recent versions haven't worked well with -j:
#NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}

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"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

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

rm -rf $PKG
mkdir -p $TMP $PKG/lib${LIBDIRSUFFIX}
cd $TMP 
rm -rf $PKGNAM-$VERSION
tar xvf $CWD/$PKGNAM-$VERSION.tar.xz || exit 1
cd $PKGNAM-$VERSION || 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 {} \+

# Put the pkgconfig files in the proper location:
zcat $CWD/libcap.pkgconfig.path.diff.gz | patch -p1 --verbose || exit 1

# Set the CFLAGS
sed -i "s/^\(DEBUG =\).*/\1$SLKCFLAGS/" Make.Rules

# Disable broken gperf support:
sed -i 's@^BUILD_GPERF@#\0@' Make.Rules

make DYNAMIC=yes GOLANG=$GOSUPPORT || exit 1
make install RAISE_SETFCAP=no GOLANG=$GOSUPPORT DESTDIR=$PKG man_prefix=/usr || exit 1
chmod 755 $PKG/lib${LIBDIRSUFFIX}/libcap.so*

# Don't ship the static libcap.a. Leave libpsx.a alone, though - there's no
# dynamic equivalent for that one:
rm -f $PKG/lib*/libcap.a

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

# Add included scripts
( cd contrib || exit 1
  for file in pcaps4convenience pcaps4server pcaps4suid0 ; do
    install -m 0755 -D $file $PKG/usr/sbin/$file
  done
)

# glibc already has the capget/capset manpage
rm -rf $PKG/usr/man/man2

# Compress the man pages
( cd $PKG/usr/man
  find . -type f -exec gzip -9 {} \+
  for i in $(find . -type l) ; do ln -s $(readlink $i).gz $i.gz ; rm $i ; done
)

mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION
cp -a \
  CHANGELOG License README pgp.keys.asc doc/capability.notes \
  progs/quicktest.sh $CWD/capfaq-0.2.txt $CWD/README.SLACKWARE \
  $PKG/usr/doc/$PKGNAM-$VERSION
chown -R root:root $PKG/usr/doc
find $PKG/usr/doc -type f -exec chmod 644 {} \+

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

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