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#!/bin/bash
#
# lspkg v0.4: view installed and contents of slackware packages
#
# feedback: rhatto at riseup.net | gpl
#
#  Lspkg is free software; you can redistribute it and/or modify it under the
#  terms of the GNU General Public License as published by the Free Software
#  Foundation; either version 2 of the License, or any later version.
#
#  Lspkg is distributed in the hope that it will be useful, but WITHOUT ANY
#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
#  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License along with
#  this program; if not, write to the Free Software Foundation, Inc., 59 Temple
#  Place - Suite 330, Boston, MA 02111-1307, USA
#

COMMON="/usr/libexec/simplepkg/common.sh"
PKG_LIST_DIR="var/log/packages"

if [ -f "$COMMON" ]; then
    source $COMMON
else
    echo "error: file $COMMON not found, check your `basename $0` installation"
    exit 1
fi

function head_line {
    echo "usage: [ROOT=/otherroot] `basename $0` [option expression]"
}

function usage {
    head_line
    echo "
options are:

   -v, --view: view installed package contents
   -p, --print: print the contents of a package file
   -r, --remove: remove matching packages
   -s, --search: search a file under installed packages
   -d, --description: show matching packages' descriptions
"
}

# -----------------------------------------------------
#                       lspkg
# -----------------------------------------------------

if [ $# -eq 2 ]; then
  pack=$2
elif [ $# -eq 1 ]; then
  pack=$1
else
  pack=""
fi

if [ ! -z "$pack" ]; then
  if echo $pack | grep -q "*"; then
    LIST_PKGS="`ls -1 /$ROOT/$PKG_LIST_DIR/$pack 2> /dev/null`"
  else
    pack="`echo $pack | sed -e 's/\+/\\\+/'`"
    LIST_PKGS=`eval "ls -1 /$ROOT/$PKG_LIST_DIR/ 2> /dev/null | grep -E '^$pack-[^-]+-[^-]+-[^-]+$'"`
  fi
else
  LIST_PKGS="`ls /$ROOT/$PKG_LIST_DIR/ 2> /dev/null`"
fi

LIST_PKGS="`slash $LIST_PKGS`"

case $1 in
    "-h"|"--help")
        usage
    ;;
    "-v"|"--view")
        if [ ! -z "$2" ]; then
            if [ ! -z "$LIST_PKGS" ]; then
                for file in $LIST_PKGS; do
                    less /$PKG_LIST_DIR/$file
                done
            else
                if [ ! -z "$ROOT" ]; then
                    echo "$2: package not found on /$ROOT/$PKG_LIST_DIR"
                    exit 1
                else
                    echo "$2: package not found on /$PKG_LIST_DIR"
                    exit 1
                fi
            fi
        else
            head_line
            exit 1
        fi
    ;;
    "-p"|"--print")
        if [ -f "$2" ]; then
            tar ztvf $2
        else
            echo $2: file not found
        fi
    ;;
    "-r"|"--remove")
        if [ ! -z "$2" ]; then
            if [ ! -z "$LIST_PKGS" ]; then
                removepkg /$ROOT/$PKG_LIST_DIR/$1-[0-9]*
            fi
        fi
    ;;
    "-s"|"--search")
        if [ ! -z "$2" ]; then
            eval "grep -l '\/$2$' /$ROOT/$PKG_LIST_DIR/*"
        fi
    ;;
    "-d"|"--description")
        if [ ! -z "$2" ]; then
            for file in $LIST_PKGS; do
                pack="`package_name $file`"
                echo -e " Package description for $file:\n"
                sed -n "/^$pack:/ { s/$pack://; p; }" $file
            done
        else
            head_line
            exit 1
        fi
    ;;
    *)
        if [ ! -z "$LIST_PKGS" ]; then
            for pack in $LIST_PKGS; do
              echo $pack
            done
        else
            if [ ! -z "$ROOT" ]; then
                echo "$1: package not found on /$ROOT/$PKG_LIST_DIR"
                exit 1
            else
                echo "$1: package not found on /$PKG_LIST_DIR"
                exit 1
            fi
        fi
    ;;
esac