#!/bin/bash
# /usr/local/bin/diffpkg

# original script written by T3slider at
# https://www.linuxquestions.org/questions/slackware-14/listing-non-stock-slackware-packages-642787/

source /etc/functions-colors

# Get the Slackware file list
# wget http://slackware.osuosl.org/slackware-$VERSION/STOCKLIST.TXT
VERSION="`cat /etc/slackware-version | awk '{print $2}' | sed -e 's/.0//'`"
ROOTPATH="/home/public/slackware/$VERSION"
STOCKLIST="$ROOTPATH/FILELIST.TXT"

if [ ! -e "$ROOTPATH" ]; then
  if [ -n "$PS1" ] ; then
    # This shell is interactive
    echo -e "${BOLDRED}The directory ${BOLDWHITE}$ROOTPATH${BOLDRED} does not exist. Exiting.${COLOR_RESET}"
  else
    # This shell is not interactive
    echo "The directory $ROOTPATH does not exist. Exiting."
  fi
  exit 1
fi

PATCHESLIST="$ROOTPATH/patches/FILE_LIST"
EXTRALIST="$ROOTPATH/extra/FILE_LIST"

STOCKPGKS="$HOME/tmp/stockpackages.txt"
PATCHESPGKS="$HOME/tmp/patchpackages.txt"
EXTRAPGKS="$HOME/tmp/extrapackages.txt"
ALLPKGS="$HOME/tmp/allpackages.txt"

DIFFSTOCKPKGS="$HOME/tmp/diffstockpkgs.txt"
DIFFALLPKGS="$HOME/tmp/diffallpkgs.txt"
DIFFALLPKGS2="/home/public/tmp" # alternate storage location

# Parse the file list, isolating only the .tgz packages (and in this case
# only the core slackware packages, excluding extra/, pasture/, testing/ etc.
# The filenames are also isolated and parsed.
echo "Checking stock packages..."
for i in $(cat $STOCKLIST | grep .tgz$ | grep \/slackware\/ | \
awk '{ print $8 }'); do basename $i; done | sed 's/.tgz$//g' | \
sort > $STOCKPGKS

# Make a list of the installed packages and sort them just as the above
# file
ls -A /var/log/packages/ | sort > $ALLPKGS

# Show only the packages ADDED by you, INCLUDING the official Slackware
# patches
diff -U 0 $STOCKPGKS $ALLPKGS | grep -v \@\@$ | grep ^\+ | \
grep -v \+\+\+ | sed 's/^+//g' | sort > $DIFFSTOCKPKGS

# Get the patches file list
# wget http://slackware.osuosl.org/slackware-$VERSION/patches/FILE_LIST
# Parse the file list, isolating only the .tgz packages (and in this case
# only the packages, excluding the source
# The filenames are also isolated and parsed.
if [ -e "$PATCHESLIST" ]; then
  echo "Checking patches..."
  for i in $(cat $PATCHESLIST | grep .tgz$ | grep \/packages\/ | \
  awk '{ print $8 }'); do basename $i; done | sed 's/.tgz$//g' | \
  sort > $PATCHESPGKS
  # Show only
  diff -U 0 $PATCHESPGKS $DIFFSTOCKPKGS | grep -v \@\@$ | grep ^\+ | \
  grep -v \+\+\+ | sed 's/^+//g' | sort > $DIFFALLPKGS
else
  cp $DIFFSTOCKPKGS $DIFFALLPKGS
fi

# Get the extra file list
# wget http://slackware.osuosl.org/slackware-$VERSION/extra/FILE_LIST
# Parse the file list, isolating only the .tgz packages (and in this case
# only the packages, excluding the source
# The filenames are also isolated and parsed.
# if [ -e "$EXTRALIST" ]; then
#   echo "Checking extra..."
#   for i in $(cat $EXTRALIST | grep .tgz$ | grep \/packages\/ | \
#   awk '{ print $8 }'); do basename $i; done | sed 's/.tgz$//g' | \
#   sort > $EXTRAPGKS
#   # Show only
#   diff -U 0 $EXTRAPGKS $DIFFSTOCKPKGS | grep -v \@\@$ | grep ^\+ | \
#   grep -v \+\+\+ | sed 's/^+//g' | sort > $DIFFALLPKGS
# else
#   cp $DIFFSTOCKPKGS $DIFFALLPKGS
# fi

# the end
rm -f $DIFFSTOCKPKGS 2> /dev/null
rm -f $ALLPKGS 2> /dev/null
rm -f $PATCHESPGKS 2> /dev/null
rm -f $STOCKPGKS 2> /dev/null
rm -f $EXTRAPGKS 2> /dev/null
cp $DIFFALLPKGS $DIFFALLPKGS2
if [ -n "$PS1" ] ; then
  # This shell is interactive
  echo "A list of non-stock Slackware packages is available in:"
  echo -e "${BOLDGREEN}$DIFFALLPKGS${COLOR_RESET}"
  echo "and"
  echo -e "${BOLDGREEN}$DIFFALLPKGS2${COLOR_RESET}"
else
  # This shell is not interactive
  echo "A list of non-stock Slackware packages is available in:"
  echo "$DIFFALLPKGS"
  echo "and"
  echo "$DIFFALLPKGS2"
fi