#!/bin/sh
LIB=/usr/public/pkg/noweb/lib
# attempt to convert nuweb to noweb using sam

tmp=$($LIB/nwmktemp)
trap '/bin/rm -f $tmp; exit 1' 1 2 15	# clean up files
cp $1 $tmp || exit 1

notat='([^@]|\n)'
white='[ 	\n]'
sam -d $tmp << EOF
,x/\@\@/c/{{{the magic at sign}}}/
,x/<</c/{{{double left brackets}}}/
,x/>>/c/{{{double right brackets}}}/
,x/@m/c/\\nowebchunks/
,x/@u/c/\\nowebindex/
,x/\@[oO][^@]*$/x/ -[dit][a-zA-Z]*/v/..../d
,x/\@[dDoO|}]/i/\n/
,x/\n\n\@[dDoO|}]/s/\n\n/\n/
,x/\@[dDoO]${notat}*\@{/s/\n/ /g
,x/\@[dDoO]${notat}*\@{/{
s/\@[dDoO] */<</
s/\@{/>>=\n/
}
,s/\@</<</g
,s/\@>/>>/g
,x/<<[^>]*(>[^>][^>]*)*>>/s/[ 	][ 	]*/ /g
,x/<< | >>/s/ //
,x/\@\|$notat*\@}/x/\n/a/@ %def /
,x/\@ %def \@}/c/@ /
,x/\@\|/c/@ %def /
,s/\@}/@ /g
,x/\n\@ %def.*\n\@ *\n/x/\n\@ *\n/c/\n/
,x/^\@ %def.*$/s/[ 	]+/ /g
,x/{{{the magic at sign}}}/c/@/
,x/{{{double left brackets}}}/c/@<</
,x/{{{double right brackets}}}/c/@>>/
w
EOF
$LIB/markup $tmp | $LIB/disambiguate | $LIB/unmarkup
rm $tmp
