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#!/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.

# Slackware build script for tar

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

PKGNAM=tar
VERSION=1.30
BUILD=${BUILD:-2}

NUMJOBS=${NUMJOBS:--j7}

# Automatically determine architecture for build & packaging:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i586 ;;
    # 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-tar

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

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

# This old version is the only one that won't clobber symlinks, e.g.:
# someone moves /opt to /usr/opt and makes a symlink.  With newer
# versions of tar, installing any new package will remove the /opt
# symlink and plop down a new directory there.
# Well, there's a lot of other bugs (the remote stuff particularly I'm
# told is flaky) in tar-1.13, so it'll only be here now for use by the
# Slackware package utils.  And, we'll even let people remove it and
# the pkgutils will still try to work (but eventually they'll pay the
# price :)
#
# NOTE:  The latest versions of tar can supposedly work for the pkgtools,
# but some changes to add new options to the scripts might be required.
#
# Until tar-1.13 won't compile any more, it might be safer to keep using
# it, though.
cd $TMP
rm -rf tar-1.13
tar xvf $CWD/tar-1.13.tar.gz --no-same-owner || exit 1
cd tar-1.13 || exit 1
zcat $CWD/tar-1.13.bzip2.diff.gz | patch -p1 --verbose || exit 1
# The original config.{guess,sub} do not work on x86_64
cp -p --verbose /usr/share/libtool/build-aux/config.{guess,sub} .
chown -R root:root .
CFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --disable-nls \
  --build=$ARCH-slackware-linux || exit 1
make $NUMJOBS || make || exit 1
mkdir -p $PKG/bin
cat src/tar > $PKG/bin/tar-1.13
chmod 0755 $PKG/bin/tar-1.13
# End building of tar-1.13

cd $TMP
rm -rf tar-$VERSION
tar xvf $CWD/tar-$VERSION.tar.xz --no-same-owner || exit 1
cd tar-$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 {} \;

# The "A lone zero block at %s" messages also cause problems:
zcat $CWD/tar.nolonezero.diff.gz | patch -p1 --verbose || exit 1

FORCE_UNSAFE_CONFIGURE=1 \
CFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --infodir=/usr/info \
  --mandir=/usr/man \
  --docdir=/usr/doc/tar-$VERSION \
  --enable-backup-scripts \
  --build=$ARCH-slackware-linux || exit 1

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

( 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
)

mv $PKG/usr/bin/tar $PKG/bin
( cd $PKG/usr/bin ; ln -sf /bin/tar . )
( cd $PKG/bin ; ln -sf tar tar-$VERSION )

# Support "historic" rmt locations:
mkdir -p $PKG/{etc,sbin}
( cd $PKG/etc
  ln -sf /usr/libexec/rmt .
  cd $PKG/sbin
  ln -sf /usr/libexec/rmt .
)

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

# Compress info files, if any:
if [ -d $PKG/usr/info ]; then
  ( cd $PKG/usr/info
    rm -f dir
    gzip -9 *
  )
fi

mkdir -p $PKG/usr/doc/tar-$VERSION
cp -a \
  AUTHORS COPYING* NEWS PORTS README* THANKS TODO \
  $PKG/usr/doc/tar-$VERSION

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

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