#!/bin/sh

methods="/usr/local/methods"
[ -z $SFX_METHODS_DIR ]||methods=$SFX_METHODS_DIR

[ `echo $1|grep -c tgz` -lt 1 ] && {
clear
cat <<!
'sfx' converts a gzipped tarball into a self-extracting file.
Copyright Benjamin Okopnik, (c) 2000 Released under the GNU GPL.

Hint: run 'tar cvzf <filename.tgz> file ...' to create the
archive, then run 'sfx' to make it self-extracting.

Syntax:  sfx <filename.tgz> [method]
         sfx <filename.tgz.sfx> [-]
    
 -        Convert <filename.tgz.sfx> back to <filename.tgz>.
 method   The type of action to be taken after extraction.
          If no method is specified, 'sfx' defaults to 'unzip'. 
          See the 'sfx' man page for the specifics of each method.
          The available methods are:

!

for n in $methods/*.met; do echo "          "$(basename $n .met); done
echo
echo
exit
}

[ ! -f $1 ] && {
echo
echo "Whatchu talkin' 'bout, Willis? I can't find any $1"'!'
echo
exit
}

if [ -n "$2" ]
then
    if [ x$2 == "x-" ]
    then
        L=`head -2 $1|tail -1|tail -c +3`

        if [ `head -1 $1` != '#!/bin/sh' ]
        then
            echo "This doesn't look like an SFX archive; can't convert."
            exit
        fi
        
        tail -c +$L $1 > ${1%.sfx}
        rm $1
        exit
    fi
    
    if [ `ls -1 $methods|grep -c $2` -lt 1 ]
    then
        echo
        echo "Not a valid method. Type 'sfx' to see the available methods."
        echo
        echo
        exit
    else
        cat $methods/$2.met $1 > $1.sfx; chmod +x $1.sfx; rm $1
    fi
else
    cat $methods/unzip.met $1 > $1.sfx; chmod +x $1.sfx; rm $1
fi