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#!/bin/sh

# PURPOSE :
#
# this script converts a non-threaded control file to a threaded one
# by extending appropriate names with -mt as extension
#
# eg abc.control becoms abc-mt.control
#

#
# make sure that the depends expression has enough spaces
# expression can contian : , ( ) || && 
#
tokenize() {
    sed "s/,/ & /g" | sed "s/)/ & /g" | sed "s/(/ & /g" |  sed "s/|/ & /g" | sed "s/&/ & /g"
}

#
# function converts package name to threaded equivalend IF the
# package file HAS a threaded version
#
findthreadedequiv() {
      local isin i
      for i in $*
      do
        isin=`grep "^$i\$" "$ALLTHREADEDPKGSFILE"`
        if [ -z "$isin" ]
        then
          # no threaded package
          echo -n "$i "
        else
          # threaded package
          echo -n "${isin}-mt " 
        fi
      done
      echo 
}

#
# signature of binary files
# currently obsolete
#
# ISBINARY="*ELF*LSB*"

usage() {
      echo "Usage : tothreaded <controlfile> <ALLPackages file>"
      exit 2
}

. scripts/SpecialMTFiles

#
# get the name of the controlfile to check for threading
#
if [ -z "$1" ]
then
    usage
fi
controlfile=$1
shift

case $controlfile in
  *-mt.control)
    #already threaded
    echo $controlfile
    exit 0;
    ;;
esac

#
# file containing list of all known threaded packages
#
if [ -z "$1" ]
then
    usage
fi
ALLTHREADEDPKGSFILE=$1
shift

#
# strip out the name of the package
#
packagename=${controlfile##*/}  # path
packagename=${packagename%.control} # extension

#
# generate new control file
#
newcontrolfile=${controlfile/\.control/-mt\.control}

#
# read all lines in original control file
#
while read line
do
  case $line in
    # convert some files to threaded equivalent
    "Files:"*)
       files=${line#Files:}
       # thread-converted files
       T_files=`ConvertSpecialFiles "$files"`
       echo "Files: $T_files"
       ;;
     "Package: "*)
       T_package=`findthreadedequiv ${line#Package: }`
       echo "Package: ${T_package}"
       ;;
     "Depends: "*)
       depends=`echo "${line#Depends: }" | tokenize`
       T_depends=`findthreadedequiv ${depends}`
       echo "Depends: $T_depends"
       ;;
     "Provides: "*)
       T_provides=`findthreadedequiv ${line#Provides: }`
       echo "Provides: $T_provides"
       ;;
     "Conflicts: "*)
       conflicts=`echo "${line#Conflicts: }" | tokenize`
       T_conflicts=`findthreadedequiv ${conflicts}`
       echo "Conflicts: $T_conflicts"
       ;;
     *":"*) 
       echo "$line"
       ;;
     *) # al other lines
       echo " $line"
       ;;
  esac
done < $controlfile > $newcontrolfile

echo $newcontrolfile