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####################################################################################################

# This is a class action script for the replace class 

# For each file in this class it will replace any replace tags in that file as it copies it to dest.

# It searches the src file for <REPLACETAG-XXX> and for each one it

#    Looks for Environment var XXX and if it exists it is used to replace the tag in the file

#    otherwise it prints a warning if the Var does not exist.

# If no tags are found in the file it is simply copied to dest

# These environment vars are setup by pkginfo or request script

# Just need to make sure that these vars match the XXX portion of the REPLACETAG

####################################################################################################

getList()

{

    sed -n '

    :start

    /<REPLACETAG/{

        :leading

        /^<REPLACETAG/!{

            # while replace tag not at beginning of line remove leading chars

            s/^<\{0,1\}[^<]*//

            b leading

        }

        # we now should have replace tag at start of line

        # save line

        h

        # print 1st REPLACETAG, ie remove all after tag and print line

        s/^<\(REPLACETAG[^>]*\)>.*$/\1/p

        #restore orignial line & remove printed replace & jump to start to see if any more on same line

        x

        s/^<REPLACETAG[^>]*>\(.*\)$/\1/

        b start

    }' $1 | sort | uniq | awk 'BEGIN { ORS=" " } { print $0 }'

}

Warn=

while read src dest

do  

    if [ "$src" != "/dev/null" ]; then

        # Get list of REPLACETAG- in current file

        LIST=`getList $src`

        Msg=

        sedArgs=

        for tag in $LIST

        do

            # Remove REPLACETAG- from front of tag to get the enviroment var name

            var=`echo $tag | sed 's|^REPLACETAG-||'`

            # now eval the name and expand the var to get contents into repl

            repl=`eval echo \\$$var`

            if [ -n "$repl" ]; then

                Msg="$Msg    [$tag=$repl]\n"

                sedArgs="$sedArgs -e 's|<$tag>|$repl|g'"

            else

                Warn="$Warn===>WARNING: Install Environment Var [$var] does not exist for replacement in [$dest]\n"

            fi

        done

        installf -c replace $PKGINST $dest f

        if [ -n "$sedArgs" ]; then

            printf "$dest <Replacements as follows>\n$Msg"

            eval sed $sedArgs $src > $dest

        else

            printf "$dest <No Replacements Found>\n$Msg"

            cp $src $dest

        fi

    fi

done

if [ "$1" = "ENDOFCLASS" ]; then

#   Dont do the -f option here as it stops the package from setting the modtimes of the

#   resultant files to the value in the pkgmap file. 

#   The files are already in pkgmap and pkgadd will do its own finalise on completion

#    installf -f -c replace $PKGINST

    echo "Replacements Completed"

    if [ -n "$Warn" ]; then

        printf "$Warn"

    fi

fi