#!/bin/bash
#
# Distrowatch packages update checker
# Copyright (c) 2004-2009 by Silvan Calarco <silvan.calarco@mambasoft.it>
#

. /etc/sysconfig/openmamba-central
DISTROMATIC_PREFIX=/distribution/distromatic.html?
DISTROMATIC_REPOSITORY=devel
DISTDB=/etc/autodist/distdb
DISTDBDIR=/etc/autodist/distdb.d

[ -r $DISTDB ] && {
   . $DISTDB
   [ -d $DISTDBDIR ] && \
      for f in `ls $DISTDBDIR/*.db`; do
         . $f
      done
}

[ -r $PKGLIST_FILE ] || {
   echo "Error: file $PKGLIST_FILE cannot be read; aborting." >&2
   exit 1
}

[ -r $ALIASES_DB ] || {
   echo "Error: file $ALIASES_DB cannot be read; aborting." >&2
   exit 1
}

function usage() 
{
   echo "openmamba-dw-checklist [-h|-m][-r repository]"
   echo
   echo " -h: generate distromatic HTML output"
   echo " -m: show missing packages only"
   echo " -r repository: specify the repository (default: devel)"
   echo " -o repository: specify the repository for output data (default: devel-autodist)"
   echo  
}
echo "openmamba-dw-checklist - distrowatch packages update status file creator" >&2

get_job_vector() {
   local JNAME=$1

   # resolve JOB_NAME from distdb
   # note: if JOB_NAME contains a "-" it can't be a distdb JOB, so skip it
   if [ "${JNAME/-/}" = "${JNAME}" ]; then
      local jobtmpfile=`tempfile`
      # hack to get an array variable named as $j assigned to the JOB array
      echo "echo \${$JNAME[*]}" > $jobtmpfile
      JOB=(`. $jobtmpfile`)
      rm -f $jobtmpfile
   else
      JOB=()
   fi

   if [ ${#JOB[*]} -eq 0 ]; then
       # create a default job with given JOB_NAME
       JOB=($JNAME "" "")
   elif [ ${#JOB[*]} -eq 1 ]; then
       # no variables defined, add an empty job
       JOB=(${JOB[*]} "" "")
   fi
   JOB_PKGS=(${JOB[0]//,/ })
   JOB_VARNAMES=(${JOB[1]//,/ })
}

function version_compare()
{
   local A B
   A=$1
   B=$2

   if [ ${A/[a-zA-Z_]*} -gt ${B/[a-zA-Z_]*} ]; then
      return 1
   elif [ ${A/[a-zA-Z_]*} -lt ${B/[a-zA-Z_]*} ]; then
      return 2
   else
      if [[ "$A" > "$B" ]]; then
         return 1
      elif [[ "$A" < "$B" ]]; then
         return 2
      fi
   fi
   return 0
   
}

function version_find_bigger()
{
   local VER1 VER2 FPOS CUTVER1 CUTVER2
   
   VER1=$1
   VER2=$2
   FPOS=1
   while true; do
      CUTVER1=`echo $VER1. | cut -d. -f $FPOS`
      CUTVER2=`echo $VER2. | cut -d. -f $FPOS`
      if [ "$CUTVER1" -a ! "$CUTVER2" ]; then
         return 1
      elif [ "$CUTVER2" -a ! "$CUTVER1" ]; then
         return 2
      elif [ ! "$CUTVER1" -a "$CUTVER2" ]; then
         return 0
      else
         version_compare $CUTVER1 $CUTVER2
         case $? in
            1) return 1 ;;
	    2) return 2 ;;
         esac
      fi
      FPOS=`expr $FPOS + 1`
   done
   return 0
}

while [ "$1" ]; do
   case $1 in
      -h) distromatic_html=1 ;;
      -m) if [ "$distromatic_html" ]; then
             echo "Error: options -h and -m cannot be used together."
	     usage
	     exit 1
	  else
             missing_only=1 
	  fi ;;
      -r) [ "$2" ] || {
             echo "Error: option -r requires repository name as parameter"
	     usage
	     exit 1
          }
	  DISTROMATIC_REPOSITORY=$2
	  shift
	  ;;
      *) echo "Error: invalid option $1."; usage; exit 1 ;;  
   esac
   shift
done

CACHE_DIR=${local_ftp}/$DISTROMATIC_REPOSITORY/autoupdate/
PKGLIST_FILE=${local_ftp}/$DISTROMATIC_REPOSITORY/srcpkglist
BUILDLIST_FILE=$CACHE_DIR/distrowatch.in
CONFIG_DIR=$CACHE_DIR
DISTROWATCH_DB=$CACHE_DIR/distrowatch.db
ALIASES_DB=$CACHE_DIR/aliases
MANUALVER_DB=$CACHE_DIR/manualver

> $DISTROWATCH_DB
> $DISTROWATCH_DB.missing
> $BUILDLIST_FILE

lynx -width 300 -dump http://distrowatch.com/packages.php |
while read line; do
   [ "`echo $line | grep "Package Version Note"`" ] && start_print=1
   [ "`echo $line | grep "____________________"`" ] && unset start_print
   [ "$start_print" ] && {
      set -- $line
      pkg="${1/\[*\]/}" 
      ver="${2/\[*\]/}"
      alias=`grep "^$pkg " $ALIASES_DB`
      echo "$pkg $ver ${alias/* /}" >> $DISTROWATCH_DB
   }
done

while read pkg ver alias; do
   unset pkgline
   unset found_manual
   unset found_alias
   pkgline=`grep "^$pkg " $MANUALVER_DB` && found_manual=1
   if [ ! "$found_manual" ]; then
      if [ "$alias" ]; then
         get_job_vector $alias
         lastjob=${#JOB_PKGS[*]}
         pkgline=`grep "^${JOB_PKGS[$lastjob-1]} " $PKGLIST_FILE` && found_alias=1
      else
         get_job_vector $pkg
         lastjob=${#JOB_PKGS[*]}
         pkgline=`grep "^${JOB_PKGS[$lastjob-1]} " $PKGLIST_FILE`
      fi
   fi
   if [ "$pkgline" ]; then
      set -- $pkgline
      pkgname=$1
      pkgver=$2
      version_find_bigger $pkgver ${ver/-/.}
      vercmp=$?
      [ "$found_manual" ] && pkgname=$3
      if [ ! "$missing_only" ]; then
         if [ "$distromatic_html" = "1" ]; then
	    [ "$found_alias" -o "$found_manual" ] && nameadd="$pkg" || unset nameadd
	    unset veradd
	    [ ${vercmp} = 2 ] && veradd="<font color=red>$ver</font>"
	    [ ${vercmp} = 1 ] && veradd="$ver"
#	    [ "${ver/-/}" != "$pkgver" ] && veradd="<font color=red>$ver</font>" || unset veradd
	    [ "$veradd" -o "$nameadd" ] && {
   	       [ "$veradd" -a "$nameadd" ] && \
	          verappend="($nameadd;$veradd)" || 
	          verappend="(${nameadd}${veradd})"
	    } || unset verappend
            echo "<a href=\"${DISTROMATIC_PREFIX}tag=${DISTROMATIC_REPOSITORY}&pkg=${JOB_PKGS[0]}.source\">${JOB_PKGS[0]} $pkgver</a> $verappend<br>"
	    [ $vercmp = 2 ] && {
	       if [ "$found_alias" ]; then
	          echo "$alias +$ver 0" >> $BUILDLIST_FILE
	       else
	          echo "$pkg +$ver 0" >> $BUILDLIST_FILE
	       fi
	    }
         else
            echo "$pkg $pkgver ($ver)"
         fi
      fi
   else
      echo "$pkg ($ver)" >> $DISTROWATCH_DB.missing
   fi
done < $DISTROWATCH_DB