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#!/bin/sh
# Copyright 1994, 1998, 2008  Patrick Volkerding, Moorhead, Minnesota USA 
# Copyright 2003  Slackware Linux, Inc.  Concord, CA USA
# Copyright 2009  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.
#
# Sun Apr  5 21:23:26 CDT 2009
# Support .tgz, .tbz, .tlz, and .txz packages.  <volkerdi>
#
# Wed Mar 18 15:32:33 CST 1998
# Patched to avoid possible symlink attacks in /tmp.

CWD=$(pwd)

TAR=tar-1.13
umask 022
$TAR --help 1> /dev/null 2> /dev/null
if [ ! $? = 0 ]; then
  TAR=tar
fi
if [ ! "$(LC_MESSAGES=C $TAR --version)" = "tar (GNU tar) 1.13

Copyright (C) 1988, 92,93,94,95,96,97,98, 1999 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Written by John Gilmore and Jay Fenlason." ]; then
  echo "WARNING: pkgtools are unstable with tar > 1.13."
  echo "         You should provide a \"tar-1.13\" in your \$PATH."
  sleep 5
fi

make_install_script() {
  COUNT=1
  LINE="$(sed -n "$COUNT p" $1)"
  while [ ! "$LINE" = "" ]; do
   LINKGOESIN="$(echo "$LINE" | cut -f 1 -d " ")" 
   LINKGOESIN="$(dirname $LINKGOESIN)" 
   LINKNAMEIS="$(echo "$LINE" | cut -f 1 -d ' ')"
   LINKNAMEIS="$(basename "$LINKNAMEIS")"
   LINKPOINTSTO="$(echo "$LINE" | cut -f 3 -d ' ')"
   echo "( cd $LINKGOESIN ; rm -rf $LINKNAMEIS )"
   echo "( cd $LINKGOESIN ; ln -sf $LINKPOINTSTO $LINKNAMEIS )"
   COUNT=$(expr $COUNT + 1)
   LINE="$(sed -n "$COUNT p" $1)"
  done
}

usage() {
  cat << EOF

Usage: makepkg package_name.tgz
       (or: package_name.tbz, package_name.tlz, package_name.txz)

Makes a Slackware compatible package containing the contents of the current
and all subdirectories.  If symbolic links exist, they will be removed and
an installation script will be made to recreate them later. This script will
be called "install/doinst.sh". You may add any of your own ash-compatible
shell scripts to this file and rebuild the package if you wish.

options:  -l, --linkadd y|n (moves symlinks into doinst.sh: recommended)
          -p, --prepend (prepend rather than append symlinks to an existing
                         doinst.sh.  Useful to link libraries needed by
                         programs in the doinst.sh script)
          -c, --chown y|n (resets all permissions to root:root 755
                           - not generally recommended)

If these options are not set, makepkg will prompt as appropriate.
EOF
}

TMP=/tmp # This can be a hole, but I'm going to be careful about file
         # creation in there, so don't panic. :^)

# Parse options
while [ 0 ]; do
  if [ "$1" = "--linkadd" -o "$1" = "-l" ]; then
    if [ "$2" = "y" ]; then
      LINKADD=y
    elif [ "$2" = "n" ]; then
      LINKADD=n
    else
      usage
      exit 2
    fi
    shift 2
  elif [ "$1" = "--chown" -o "$1" = "-c" ]; then
    if [ "$2" = "y" ]; then
      CHOWN=y
    elif [ "$2" = "n" ]; then
      CHOWN=n
    else
      usage
      exit 2
    fi
    shift 2
  elif [ "$1" = "-p" -o "$1" = "--prepend" ]; then
    PREPEND=y
    shift 1
  elif [ "$1" = "-h" -o "$1" = "-H" -o "$1" = "--help" -o $# = 0 ]; then
    usage
    exit 0
  else
    break
  fi
done

PACKAGE_NAME="$1"
TARGET_NAME="$(dirname $PACKAGE_NAME)"
PACKAGE_NAME="$(basename $PACKAGE_NAME)"

# Identify package extension:
if [ ! "$(basename $PACKAGE_NAME .tgz)" = "$PACKAGE_NAME" ]; then
  EXTENSION="tgz"
elif [ ! "$(basename $PACKAGE_NAME .tar.gz)" = "$PACKAGE_NAME" ]; then
  # .tar.compression is also supported, although the resulting "packages" will
  # not be installable by installpkg without the correct 3 letter extension
  # instead.
  EXTENSION="tar.gz"
elif [ ! "$(basename $PACKAGE_NAME .tbz)" = "$PACKAGE_NAME" ]; then
  EXTENSION="tbz"
elif [ ! "$(basename $PACKAGE_NAME .tar.bz2)" = "$PACKAGE_NAME" ]; then
  EXTENSION="tar.bz2"
elif [ ! "$(basename $PACKAGE_NAME .tlz)" = "$PACKAGE_NAME" ]; then
  EXTENSION="tlz"
elif [ ! "$(basename $PACKAGE_NAME .tar.lzma)" = "$PACKAGE_NAME" ]; then
  EXTENSION="tar.lzma"
elif [ ! "$(basename $PACKAGE_NAME .txz)" = "$PACKAGE_NAME" ]; then
  EXTENSION="txz"
elif [ ! "$(basename $PACKAGE_NAME .tar.xz)" = "$PACKAGE_NAME" ]; then
  EXTENSION="tar.xz"
else
  EXTENSION="$(echo $PACKAGE_NAME | rev | cut -f 1 -d . | rev)"
  echo "ERROR:  Package extension .$EXTENSION is not supported."
  exit 1
fi

TAR_NAME="$(basename $PACKAGE_NAME .$EXTENSION)"

# Sanity check -- we can't make the package in the current directory:
if [ "$CWD" = "$TARGET_NAME" -o "." = "$TARGET_NAME" ]; then
  echo "ERROR: Can't make output package in current directory."
  exit 2
fi

# Make sure external compression utility is available:
case $EXTENSION in
'tgz' | 'tar.gz' )
  if ! which gzip 1> /dev/null 2> /dev/null ; then
    echo "ERROR:  gzip compression utility not found in \$PATH."
    exit 3
  fi
  ;;
'tbz' | 'tar.bz2' )
  if ! which bzip2 1> /dev/null 2> /dev/null ; then
    echo "ERROR:  bzip2 compression utility not found in \$PATH."
    exit 3
  fi
  ;;
'tlz' | 'tar.lzma' )
  if ! which lzma 1> /dev/null 2> /dev/null ; then
    echo "ERROR:  lzma compression utility not found in \$PATH."
    exit 3
  fi
  ;;
'txz' | 'tar.xz' )
  if ! which xz 1> /dev/null 2> /dev/null ; then
    echo "ERROR:  xz compression utility not found in \$PATH."
    exit 3
  fi
  ;;
esac

echo
echo "Slackware package maker, version 3.14159."
echo
echo "Searching for symbolic links:"
# Get rid of possible pre-existing trouble:
INST=$(mktemp $TMP/makepkg.XXXXXX)
# This requires the ls from coreutils-5.0 (or newer):
find . -type l -exec ls -l --time-style=long-iso {} \; | while read foo ; do echo $foo ; done | cut -f 8- -d ' ' | cut -b3- | tee $INST
if [ ! "$(cat $INST)" = "" ]; then
  echo
  echo "Making symbolic link creation script:"
  make_install_script $INST | tee doinst.sh
fi
echo
if [ ! "$(cat $INST)" = "" ]; then
  if [ -r install/doinst.sh ]; then
    echo "Unless your existing installation script already contains the code"
    echo "to create these links, you should append these lines to your existing"
    echo "install script. Now's your chance. :^)"
    echo
    echo "Would you like to add this stuff to the existing install script and"
    echo -n "remove the symbolic links ([y]es, [n]o)? "
  else
    echo "It is recommended that you make these lines your new installation script."
    echo
    echo "Would you like to make this stuff the install script for this package"
    echo -n "and remove the symbolic links ([y]es, [n]o)? "
  fi
  if [ ! "$LINKADD" ]; then
    read LINKADD;
    echo
  else
    echo $LINKADD
    echo
  fi
  if [ "$LINKADD" = "y" ]; then
    if [ -r install/doinst.sh ]; then
      UPDATE="t"
      if [ "$PREPEND" = "y" ]; then
        touch install/doinst.sh
        mv install/doinst.sh install/doinst.sh.shipped
        cat doinst.sh > install/doinst.sh
        echo "" >> install/doinst.sh
        cat install/doinst.sh.shipped >> install/doinst.sh
        rm -f install/doinst.sh.shipped
      else
        cat doinst.sh >> install/doinst.sh
      fi
    else
      mkdir -p install
      cat doinst.sh > install/doinst.sh
    fi
    echo
    echo "Removing symbolic links:"
    find . -type l -exec rm -v {} \;
    echo
    if [ "$UPDATE" = "t" ]; then
      if [ "$PREPEND" = "y" ]; then
        echo "Updating your ./install/doinst.sh (prepending symlinks)..."
      else
        echo "Updating your ./install/doinst.sh..."
      fi
    else
      echo "Creating your new ./install/doinst.sh..."
    fi
  fi
else
  echo "No symbolic links were found, so we won't make an installation script."
  echo "You can make your own later in ./install/doinst.sh and rebuild the"
  echo "package if you like."
fi
rm -f doinst.sh $INST
echo
echo "This next step is optional - you can set the directories in your package"
echo "to some sane permissions. If any of the directories in your package have"
echo "special permissions, then DO NOT reset them here!"
echo 
echo "Would you like to reset all directory permissions to 755 (drwxr-xr-x) and"
echo -n "directory ownerships to root.root ([y]es, [n]o)? "
if [ ! "$CHOWN" ]; then
  read CHOWN;
  echo
else
  echo $CHOWN
  echo
fi
if [ "$CHOWN" = "y" ]; then
  find . -type d -exec chmod -v 755 {} \; 
  find . -type d -exec chown -v root.root {} \;
fi

echo "Creating Slackware package:  ${TARGET_NAME}/${TAR_NAME}.${EXTENSION}"
echo
rm -f ${TARGET_NAME}/${TAR_NAME}.${EXTENSION}
case $EXTENSION in
'tgz' | 'tar.gz' )
  $TAR cvf - . | gzip -9c > ${TARGET_NAME}/${TAR_NAME}.${EXTENSION}
  ERRCODE=$?
  if [ ! $? = 0 ]; then
    echo "ERROR:  gzip returned error code $? -- makepkg failed."
  fi
  ;;
'tbz' | 'tar.bz2' )
  $TAR cvf - . | bzip2 -9c > ${TARGET_NAME}/${TAR_NAME}.${EXTENSION}
  ERRCODE=$?
  if [ ! $ERRCODE = 0 ]; then
    echo "ERROR:  bzip2 returned error code $ERRCODE -- makepkg failed."
  fi
  ;;
'tlz' | 'tar.lzma' )
  $TAR cvf - . | lzma -c > ${TARGET_NAME}/${TAR_NAME}.${EXTENSION}
  ERRCODE=$?
  if [ ! $ERRCODE = 0 ]; then
    echo "ERROR:  lzma returned error code $ERRCODE -- makepkg failed."
  fi
  ;;
'txz' | 'tar.xz' )
  $TAR cvf - . | xz -c > ${TARGET_NAME}/${TAR_NAME}.${EXTENSION}
  ERRCODE=$?
  if [ ! $ERRCODE = 0 ]; then
    echo "ERROR:  xz returned error code $ERRCODE -- makepkg failed."
  fi
  ;;
esac

# Warn of zero-length files:
find . -type f -size 0c | while read file ; do
  echo "WARNING:  zero length file $(echo $file | cut -b3-)"
done

# Warn of corrupt or empty gzip files:
find . -type f -name '*.gz' | while read file ; do
  if ! gzip -t $file 1> /dev/null 2> /dev/null ; then
    echo "WARNING:  gzip test failed on $(echo $file | cut -b3-)"
  else
    if [ "$(gzip -l $file | tail -n 1 | tr -s ' ' | cut -f 3 -d ' ')" -eq 0 ]; then
      echo "WARNING:  $(echo $file | cut -b3-) is an empty gzipped file"
    fi
  fi
done

# Some more handy warnings:
if [ -d usr/share/man ]; then
  echo "WARNING:  /usr/share/man (with possibly not gzipped man pages) detected"
fi

if [ -d usr/share/info ]; then
  echo "WARNING:  /usr/share/info (with possibly not gzipped info pages) detected"
fi

if find . | grep site_perl 1> /dev/null ; then
  echo "WARNING:  site_perl directory detected (this is fine for a local package build)"
fi

echo
echo "Slackware package ${TARGET_NAME}/${TAR_NAME}.${EXTENSION} created."
echo