#!/bin/bash
#
# common.sh: common functions for simplepkg
# feedback: rhatto at riseup.net | gpl
#
# Uses some functions from pkgtools, which license is:
#
# Copyright 1999  Patrick Volkerding, Moorhead, Minnesota, USA 
# Copyright 2001, 2002, 2003  Slackware Linux, Inc., Concord, California, 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.
#

BASE_CONF="/etc/simplepkg"
CONF="$BASE_CONF/simplepkg.conf"
JAIL_LIST="$BASE_CONF/jailist"

# pkgtool stuff
function package_name {

  STRING=`basename $1 .tgz`
  # Check for old style package name with one segment:
  if [ "`echo $STRING | cut -f 1 -d -`" = "`echo $STRING | cut -f 2 -d -`" ]; then
    echo $STRING
  else # has more than one dash delimited segment
    # Count number of segments:
    INDEX=1
    while [ ! "`echo $STRING | cut -f $INDEX -d -`" = "" ]; do
      INDEX=`expr $INDEX + 1`
    done
    INDEX=`expr $INDEX - 1` # don't include the null value
    # If we don't have four segments, return the old-style (or out of spec) package name:
    if [ "$INDEX" = "2" -o "$INDEX" = "3" ]; then
      echo $STRING
    else # we have four or more segments, so we'll consider this a new-style name:
      NAME=`expr $INDEX - 3`
      NAME="`echo $STRING | cut -f 1-$NAME -d -`"
      echo $NAME
    fi
  fi

}

function package_version {

  # get VERSION from a package name
  local file pack version
  file="`basename $1`"
  pack="`package_name $1`"
  version="`echo $file | sed -e "s/^$pack-//" | cut -d "-" -f 1`"
  echo $version

}

function package_arch {

  # get ARCH from a package name
  local file pack arch
  file="`basename $1`"
  pack="`package_name $1`"
  arch="`echo $file | sed -e "s/^$pack-//" | cut -d "-" -f 2`"
  echo $arch

}

function package_build {

  # get BUILD from a package name
  local file pack build
  file="`basename $1 .tgz`"
  pack="`package_name $1`"
  build="`echo $file | sed -e "s/^$pack-//" | cut -d "-" -f 3`"
  echo $build

}

function install_packages {

  # check if is time to clean the local repository
  if [[ "$SIMPLARET_CLEAN"  == "1" ]]; then
    ARCH=$ARCH VERSION=$VERSION $SIMPLARET --purge
  elif [[ ! -z "$SIMPLARET_PURGE_WEEKS" ]] && [[ "$SIMPLARET_PURGE_WEEKS" != "0" ]]; then
    ARCH=$ARCH VERSION=$VERSION $SIMPLARET --purge -w $SIMPLARET_PURGE_WEEKS
  fi

  # now tries to install each package listed in the template
  for pack in `cat $TEMPLATE | grep -v -e "^#" | cut -d : -f 1`; do

    package_downloaded="0"

    if [ "$SIMPLARET" == "simplaret" ]; then
      extrafolder="$ARCH/$VERSION/"
      extraoptions=""
    else
      unset extrafolder
      extraoptions="-a"
    fi

    # first search the package in the patches folder
    for file in `find $PATCHES_DIR/$extrafolder -name $pack*tgz`; do
      if [[ "`package_name $file`" == "$pack" ]]; then
        package_downloaded="1"
        package_file="$file"
        break
      fi
    done

    # then search the package in the standard packages folder
    if [[ "$package_downloaded" != "1" ]]; then
      for file in `find $STORAGE/$extrafolder -name $pack*tgz`; do
        if [[ "`package_name $file`" == "$pack" ]]; then
          package_downloaded="1"
          package_file="$file"
          break
        fi
      done
    fi

    # if the package wasnt found, try to donwload it
    if [[ "$package_downloaded" != "1" ]]; then
      ARCH=$ARCH VERSION=$VERSION $SIMPLARET --get $pack $extraoptions

      # it can be stored at the patches folder
      for file in `find $PATCHES_DIR/$extrafolder -name $pack*tgz`; do
        if [[ "`package_name $file`" == "$pack" ]]; then
          package_file="$file"
          break
        fi
      done

      # or it can be stored at the standard packages folder
      if [ -z "$package_file" ]; then
        for file in `find $STORAGE/$extrafolder -name $pack*tgz`; do
          if [[ "`package_name $file`" == "$pack" ]]; then
            package_file="$file"
            break
          fi
        done
      fi

    fi

    # now tries to install the package, if available
    if [ -z "$package_file" ]; then
      echo error: could not install package $pack
    else
      installed_packs="`ls /$JAIL_ROOT/$server/var/log/packages/$pack* 2> /dev/null`"
      if [ ! -z "$installed_packs" ]; then
        for installed in $installed_packs; do
          if [[ "$pack" == "`package_name $installed.tgz`" ]]; then
            echo "package $pack already installed in $JAIL_ROOT/$server ($installed)"
            package_installed="1"
            break
          fi
          if [[ "$package_installed" != "1" ]]; then
            installpkg -root /$JAIL_ROOT/$server $package_file
            unset package_installed
            if [ ! -z "$SIMPLARET_DELETE_DURING" ] && [ "$SIMPLARET_DELETE_DURING" != "0" ]; then
              SILENT=1 ARCH=$ARCH VERSION=$VERSION $SIMPLARET --purge
            fi
            break
          fi
        done
      else
        installpkg -root /$JAIL_ROOT/$server $package_file
        if [ ! -z "$SIMPLARET_DELETE_DURING" ] && [ "$SIMPLARET_DELETE_DURING" != "0" ]; then
          SILENT=1 ARCH=$ARCH VERSION=$VERSION $SIMPLARET --purge
        fi
      fi
    fi

    unset package_file

  done

  # purge packages, if needed
  if [[ "$SIMPLARET_DELETE_DOWN" == "1" ]]; then
    ARCH=$ARCH VERSION=$VERSION $SIMPLARET --purge
  fi

}

function remove_packages {

  for pack in `cat $TEMPLATE | grep -v -e "^#" | cut -d : -f 1`; do
    ROOT=/$JAIL_ROOT/$server removepkg $pack
  done

}

function eval_parameter {

  # usage: eval $1 parameter from $CONF
  # return the evaluated parameter if available or $2 $3 ... $n

  if grep -qe "^$1=" $CONF; then
    grep -e "^$1=" $CONF | cut -d = -f 2 | sed -e 's/"//g' -e "s/'//g" | awk '{ print $1 }'
  else
    shift
    echo $*
  fi

}

function eval_boolean_parameter {

  # get a boolean parameter from the configuration

  local value

  # get the value
  value="`eval_parameter $1 $2`"

  # force case insensitiveness
  value="`echo $value | tr '[:upper:]' '[:lower:]'`"

  # convert it to wheter 0 or 1
  if [ "$value" == "yes" ] || [ "$value" == "1" ]; then
    echo 1
  else
    echo 0
  fi

}

function eval_config {

  # simplepkg config file evaluation
  # usage: eval_config <program-name> [-u]

  if [ -f "$CONF" ]; then

    SIMPLARET="`eval_parameter SIMPLARET simplaret`"
    STORAGE="`eval_parameter STORAGE /var/simplaret/packages`"
    JAIL_ROOT="`eval_parameter JAIL_ROOT /vservers`"
    PATCHES_DIR="`eval_parameter PATCHES_DIR /var/simplaret/patches`"
    ROOT_PRIORITY="`eval_parameter ROOT_PRIORITY patches slackware extra testing pasture`"
    SIMPLARET_PURGE_WEEKS="`eval_parameter SIMPLARET_PURGE_WEEKS 0`"

    SIMPLARET_CLEAN="`eval_boolean_parameter SIMPLARET_CLEAN 1`"
    SIMPLARET_DELETE_DOWN="`eval_boolean_parameter SIMPLARET_DELETE_DOWN 1`"
    SIMPLARET_UPDATE="`eval_boolean_parameter SIMPLARET_UPDATE 0`"
    SIMPLARET_DELETE_DURING="`eval_boolean_parameter SIMPLARET_DELETE_DURING 0`"
    SIMPLARET_PURGE_PATCHES="`eval_boolean_parameter SIMPLARET_PURGE_PATCHES 0`"
    CONSIDER_ALL_PACKAGES_AS_PATCHES="`eval_boolean_parameter CONSIDER_ALL_PACKAGES_AS_PATCHES 0`"
    DOWNLOAD_EVEN_APPLIED_PATCHES="`eval_boolean_parameter DOWNLOAD_EVEN_APPLIED_PATCHES 0`"
    PASSIVE_FTP="`eval_boolean_parameter PASSIVE_FTP 0`"
    WARNING="`eval_boolean_parameter WARNING 0`"
    
    DEFAULT_ARCH="`eval_parameter DEFAULT_ARCH $(default_arch)`"
    DEFAULT_VERSION="`eval_parameter DEFAULT_VERSION $(default_version)`"

    # Enabling this option, jail-upgrade will look at your
    # standard repositories for new packages; if it find a package
    # with different version of your current installed package and
    # also this package isnt in the packages folder, then the new
    # package is apllied; if in doubt, just say no or leave blank.
    CONSIDER_ALL_PACKAGES_AS_PATCHES="`eval_boolean_parameter CONSIDER_ALL_PACKAGES_AS_PATCHES 0`"

    # now we place "patches" on the top of ROOT_PRIORITY
    ROOT_PRIORITY="patches `echo $ROOT_PRIORITY | sed -e 's/patches//'`"

  else
    echo $1 error: config file $CONFIG not found
    exit 1
  fi

  if [ ! -d "$STORAGE" ]; then
    mkdir -p $STORAGE
  fi

  if [ ! -d "$PATCHES_DIR" ]; then
    mkdir -p $PATCHES_DIR
  fi

  if [ -z "$ARCH" ]; then
    ARCH="$DEFAULT_ARCH" 
  fi

  if [ -z "$VERSION" ]; then
    VERSION="$DEFAULT_VERSION"
  fi

  if which $SIMPLARET &> /dev/null; then
    if [ "$SIMPLARET_UPDATE" == "1" ]; then
      if [ "$2" == "-u" ]; then
        echo "updating package database..."
        ARCH=$ARCH VERSION=$VERSION $SIMPLARET --update
      fi
    fi
  else
    echo "$SIMPLARET not found, please install it before run $0"
  fi

}

function default_version {

  # get version from /etc/slackware-version
  cat $1/etc/slackware-version | awk '{ print $2 }' | sed -e 's/.0$//'

}

function default_arch {

  # get arch from /etc/slackware-version

  local arch
  arch="`cat $1/etc/slackware-version | awk '{ print $3 }' | sed -e 's/(//' -e 's/)//'`"

  if [ -z "$arch" ]; then
    echo i386
  else
    echo $arch
  fi

}